Isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid

Abstract

The utility model discloses an isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid, which relates to the technical field of isopropanol purification appliances and comprises a rectifying tower, a feeding pipe is arranged on the side wall of the middle of the rectifying tower, a supporting seat for supporting the rectifying tower is arranged at the lower part of the rectifying tower, and a condensing cylinder is arranged at the top of the rectifying tower. The tail end of a discharging pipe opening of the condensing cylinder is provided with a backflow device, the lower end of the backflow device is provided with an extraction cylinder, a plurality of tower plates are horizontally arranged in the rectifying tower, and the side end of the backflow device is provided with a backflow pipe extending to the rectifying tower. Continuous rising of the temperature in the rectifying tower is avoided, and a liquid phase on a tower plate is kept; and through the arrangement of the reboiler and the steam outlet pipe, steam can be fed to heat the organic waste liquid, so that light substances continuously rise to purify heavy substances.

Description

Technical Field

[0001] The utility model relates to the technical field of isopropanol purification appliances, in particular to an isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid. Background Art

[0002] Isopropanol is an organic compound with the chemical formula C3H8O. It is an isomer of n-propanol. It is a colorless transparent liquid with a smell similar to a mixture of ethanol and acetone. It is soluble in water and also soluble in most organic solvents such as alcohols, ethers, benzene, and chloroform.

[0003] Currently, most organic waste liquids are recovered by rectification. During the rectification process, when the rectification temperature fluctuates, the product will be doped with some impurities, resulting in insufficient relative purity of the extracted isopropanol and unable to meet the specified standards. Therefore, this application designs an isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art and propose an isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: an isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid, including a rectification tower. A feed pipe is provided on the middle side wall of the rectification tower. A support seat for supporting the rectification tower is provided at the lower part of the rectification tower. A condensation cylinder is provided at the top of the rectification tower. A reflux device is provided at the end of the discharge pipe orifice of the condensation cylinder. An extraction cylinder is provided at the lower end of the reflux device. Several trays are horizontally provided inside the rectification tower. A reflux pipe extending to the rectification tower is provided at the side end of the reflux device.

[0006] Preferably, a reboiler is provided at the lower side end of the rectification tower. A discharge pipe is provided at the bottom of the rectification tower. A first liquid inlet pipe for connecting the discharge pipe is provided under the reboiler. A steam outlet pipe extending into the inner cylinder of the rectification tower is provided at the top of the reboiler.

[0007] Preferably, a through hole is opened in the middle of the tray. Two baffles are symmetrically provided on both sides of the tray. Liquid discharge grooves are opened on both baffles.

[0008] Preferably, a partition plate is vertically inclined on the tray. Liquid discharge openings are symmetrically opened on both sides of the tray. Several flow guiding plates are equidistantly provided at the lower end of the baffle.

[0009] Preferably, a liquid outlet pipe for discharging high-temperature water liquid is provided at the upper end of the condensation cylinder. A water liquid inlet pipe for inputting low-temperature water liquid is provided at the lower end of the condensation cylinder. An electric heating coil for heating the organic waste liquid is provided inside the reboiler.

[0010] Preferably, a liquid discharge pipe is provided at the lower end of the extraction cylinder, a product pipe is provided in the middle of the extraction cylinder, a water inlet pipe is provided at the upper part of the extraction cylinder, an observation partition is provided on the side wall of the extraction cylinder, and a water-liquid sensor is provided inside the extraction cylinder at the side end of the observation partition.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the present utility model, through the setting of the refluxer and the reflux pipe, the liquid phase cooled by the condensation cylinder can be added to the top plate of the tower top, so as to maintain the temperature of the tower top, reduce the temperature fluctuation caused by the high-temperature accumulation of steam and the temperature reduction of the feed, make the types of condensed products more stable and the product purity higher. Through the setting of the reboiler and the steam outlet pipe, steam can be sent to heat the organic waste liquid, so that the light components continuously rise to purify the heavy components. Through the setting of the baffle and the lower liquid tank, the liquid layer can be kept at a certain height, so as to better contact and conduct heat with the gas phase. Through the setting of the partition, the liquid phase can flow more smoothly, making the contact and heat conduction between the gas phase and the liquid phase more stable. Through the setting of the electric heating coil on the reboiler, steam can be better sent to vaporize the product; the water-liquid sensor can send a specified electrical signal after the water medium reaches the specified position of the capacitor plate, so that when the stratification is located in the upper layer, the liquid discharge pipe discharges the liquid, and when the stratification is located in the lower layer, the product pipe discharges isopropanol. After a certain period of time, water is added to the water inlet pipe while the liquid discharge pipe discharges the water-liquid, avoiding the absorption of saturated acetone by the water-liquid and affecting the purification of isopropanol. Description of the Drawings

[0012] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0013] Figure 1 is a schematic overall three-dimensional structure diagram proposed by the present utility model;

[0014] Figure 2 is a schematic three-dimensional structure diagram of the distillation column proposed by the present utility model;

[0015] Figure 3 is a schematic overall sectional three-dimensional structure diagram proposed by the present utility model;

[0016] Figure 4 is a schematic three-dimensional structure diagram of the tray proposed by the present utility model;

[0017] Figure 5 is a schematic three-dimensional structure diagram of the condenser tube proposed by the present utility model;

[0018] Figure 6 is a schematic three-dimensional structure diagram of the extraction cylinder proposed by the present utility model.

[0019] Reference numerals in the figure: 1, support base; 2, rectification column; 3, condensation cylinder; 4, reflux device; 5, extraction cylinder; 6, reboiler; 7, steam outlet pipe; 8, feed pipe; 9, tray; 10, reflux pipe; 11, baffle; 12, deflector; 13, liquid outlet pipe; 14, observation partition; 15, water-liquid sensor. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Embodiment: Refer to Figure 1-6 , an isopropanol recovery tower for rectifying and separating hydrazine hydrate organic waste liquid in the present invention, includes a rectification column 2. A feed pipe 8 is provided on the middle side wall of the rectification column 2. A support base 1 for supporting the rectification column 2 is provided at the lower part of the rectification column 2. A condensation cylinder 3 is provided at the top of the rectification column 2. A reflux device 4 is provided at the end of the discharge pipe orifice of the condensation cylinder 3. An extraction cylinder 5 is provided at the lower end of the reflux device 4. Several trays 9 are horizontally arranged inside the rectification column 2. A reflux pipe 10 extending to the rectification column 2 is provided at the side end of the reflux device 4. Through the arrangement of the reflux device and the reflux pipe, the liquid phase cooled by the condensation cylinder can be added to the top plate of the tower top, so as to maintain the temperature of the tower top and reduce the temperature fluctuation caused by the high-temperature accumulation of steam and the temperature reduction of the feed, making the types of condensed products more stable and the product purity higher; A reboiler 6 is provided at the lower side end of the rectification column 2. A discharge pipe is provided at the bottom of the rectification column 2. A first liquid inlet pipe for connecting the discharge pipe is provided below the reboiler 6. A steam outlet pipe 7 extending to the inner cylinder of the rectification column 2 is provided at the top of the reboiler 6. Through the arrangement of the reboiler 6 and the steam outlet pipe 7, steam can be sent to heat the organic waste liquid, so that the light components continuously rise to purify the heavy components; A through hole is opened in the middle of the tray 9. Two baffles 11 are symmetrically provided on both sides of the tray 9. Liquid discharge grooves are opened on the baffles 11. Through the arrangement of the baffles 11 and the liquid discharge grooves, the liquid layer can be maintained at a certain height, so as to better contact and conduct heat with the gas phase.

[0022] In the present utility model, a partition board is vertically and obliquely arranged on the tray 9. Lower liquid outlets are symmetrically arranged on both sides of the tray 9. Several flow guiding plates 12 are equidistantly arranged at the lower end of the baffle 11. Through the arrangement of the flow guiding plates 12, the smooth descent of the liquid phase can be better guided. Through the arrangement of the partition board, the liquid phase can flow more smoothly, making the contact heat conduction between the gas phase and the liquid phase more stable; an outlet pipe 13 for discharging high-temperature water liquid is arranged at the upper end of the condensation cylinder 3, and a water liquid inlet pipe for inputting low-temperature water liquid is arranged at the lower end of the condensation cylinder 3. An electric heating coil for heating the organic waste liquid is arranged inside the reboiler 6. Through the arrangement of the electric heating coil on the reboiler 6, the steam vaporization product can be better fed; a drain pipe is arranged at the lower end of the extraction cylinder 5, a product pipe is arranged in the middle of the extraction cylinder 5, a water inlet pipe is arranged at the upper part of the extraction cylinder 5, an observation partition board 14 is arranged on the side wall of the extraction cylinder 5, and a water liquid sensor 15 is arranged inside the extraction cylinder 5 at the side end of the observation partition board 14. The water liquid sensor 15 can emit a specified electrical signal after the water medium reaches a specified position of the capacitor plate, so that when the stratification is in the upper layer, the drain pipe discharges the liquid, and when the stratification is in the lower layer, the product pipe discharges isopropanol. After a certain period of time, water is added through the water inlet pipe while the drain pipe discharges the water liquid, avoiding the water liquid from absorbing saturated acetone and affecting the purification of isopropanol.

[0023] Working principle: When the present utility model is in use, first pour the organic waste liquid into the rectification tower 2 from the feed pipe 8. At the same time, the reboiler 6 conveys steam into the rectification tower 2 through the steam outlet pipe 7. The input steam heats and vaporizes the product at the bottom of the kettle, so that the high-temperature gas phase continuously rises through the tray 9. The organic waste liquid and the liquid phase in the top reflux condenser 4 continuously fall until the bottom of the kettle. Subsequently, the gas phase enters the condensation cylinder 3 and liquefies in the condensation cylinder 3 and enters the reflux condenser 4. The water liquid sensor 15 can emit a specified electrical signal after the water medium reaches a specified position of the capacitor plate, so that when the stratification is in the upper layer, the drain pipe discharges the liquid, and when the stratification is in the lower layer, the product pipe discharges isopropanol. After a certain period of time, water is added through the water inlet pipe while the drain pipe discharges the water liquid, avoiding the water liquid from absorbing saturated acetone and affecting the purification of isopropanol.

[0024] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An isopropanol recovery tower for distillation separation of hydrazine hydrate organic waste liquid, comprising a distillation tower (2), characterized in that: A feed pipe (8) is provided on the middle side wall of the distillation tower (2), a support base (1) for supporting the distillation tower (2) is provided at the lower part of the distillation tower (2), a condenser (3) is provided on the top of the distillation tower (2), a reflux device (4) is provided at the end of the discharge pipe of the condenser cylinder (3), an extraction cylinder (5) is provided at the lower end of the reflux device (4), a plurality of trays (9) are horizontally provided inside the distillation tower (2), and a reflux pipe (10) extending to the distillation tower (2) is provided at the side end of the reflux device (4).

2. An isopropanol recovery tower for distillation separation of hydrazine hydrate organic waste liquid according to claim 1, characterized in that: A reboiler (6) is provided at the lower end of the distillation tower (2), a discharge pipe is provided at the bottom of the distillation tower (2), a first liquid inlet pipe for connecting to the discharge pipe is provided below the reboiler (6), and a steam outlet pipe (7) extending to the inner cylinder of the distillation tower (2) is provided at the top of the reboiler (6).

3. An isopropanol recovery tower for distillation separation of hydrazine hydrate organic waste liquid according to claim 1, characterized in that: An air hole is provided in the middle of the tower plate (9), two baffles (11) are symmetrically provided on both sides of the tower plate (9), and a lower liquid tank is provided on each of the baffles (11).

4. An isopropanol recovery tower for distillation separation of hydrazine hydrate organic waste liquid according to claim 3, characterized in that: A partition is vertically inclined on the tower plate (9), lower liquid ports are symmetrically provided on both sides of the tower plate (9), and a plurality of guide plates (12) are equidistantly provided at the lower end of the baffle plate (11).

5. An isopropanol recovery tower for distillation separation of hydrazine hydrate organic waste liquid according to claim 2, characterized in that: The upper end of the condensing cylinder (3) is provided with a liquid outlet pipe (13) for carrying out high-temperature liquid water, the lower end of the condensing cylinder (3) is provided with a liquid inlet pipe for inputting low-temperature liquid water, and the interior of the reboiler (6) is provided with an electric heating coil for heating the organic waste liquid.

6. An isopropanol recovery tower for distillation separation of hydrazine hydrate organic waste liquid according to claim 5, characterized in that: A liquid discharge pipe is provided at the lower end of the extraction cylinder (5), a product pipe is provided at the middle of the extraction cylinder (5), a water inlet pipe is provided at the upper part of the extraction cylinder (5), an observation partition (14) is provided on the side wall of the extraction cylinder (5), and a water sensor (15) is provided inside the extraction cylinder (5) at the side end of the observation partition (14).

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