Coal tar dehydration device

Abstract

The utility model discloses a coal tar dehydration device which comprises a distillation flask (3), a reflux condensate water collector (7) connected with the distillation flask (3), a first collection flask (11) connected with the lower part of the reflux condensate water collector (7), and a coiled pipe condenser (10) and a second collection flask (12) which are sequentially connected with the upper part of the reflux condensate water collector (7), and a flow guide fan blade (6) is arranged in the reflux condensate water collector (7). The coal tar dehydration device provided by the utility model has the characteristics of simplicity and convenience in installation and operation, thorough water separation, high dehydration efficiency and no discharge of irritant gas.

Description

Technical Field

[0001] The utility model relates to the field of coal tar pretreatment, in particular to a coal tar dehydration device. Background Art

[0002] Coal tar is a black or dark brown viscous liquid product with a pungent odor produced during the pyrolysis of coal. According to the different pyrolysis temperatures, coal tar can be divided into low-temperature coal tar, medium-temperature coal tar and high-temperature coal tar. Since the presence of water in coal tar will increase the system pressure during the tar distillation process, and the soluble substances contained in the water will corrode the system pipelines, coal tar must be dehydrated before processing.

[0003] At present, the small coal tar dehydration treatment device used in the laboratory often adopts the heating distillation dehydration method, which volatilizes the water in the coal tar by heating, and separates it from the coal tar after condensation. For example, the Chinese patent with the publication number CN107510950A discloses a distillation condensation reflux device, wherein the reflux condenser includes a distillation port, a distillation tube, a condenser, a receiver, a valve on the receiver, a valve below the receiver, and a reflux pipe. A serpentine condenser is arranged inside the condenser, and the lower end of the condenser is a condensed water inlet, and the upper end is a condensed water outlet. The distillation tube is a right-angle elbow, and the lower end is connected to the distillation port, and the upper end is connected to the lower end of the condenser. A distillation tube valve is arranged in the middle of the distillation tube, and a defoamer is arranged after the valve. The reflux pipe is a straight pipe, and the lower end is connected to the distillation pipe at the lower part of the distillation tube valve, and the upper end is connected to the straight pipe at the lower end of the condenser, and is located at the lower part of the distillation elbow and the upper part of the receiver upper valve. And the Chinese patent with the publication number CN205095821U discloses a distillation device for preventing condensed water from flowing back. It includes a cooling pipe outlet, a cooling spiral pipe, a cooling pipe inlet, a reflux water outlet, a condensate collecting tank, a bottleneck, a bottle body, and a heating furnace. The cooling pipe outlet is fixedly connected to the cooling spiral pipe, and the other end of the cooling spiral pipe is connected to the cooling pipe inlet. The condensate collecting tank is arranged on the inner wall of the bottleneck, and the reflux water outlet is connected to the condensate collecting tank.

[0004] In actual operation, due to the uneven heating of various parts of coal tar, it is difficult to ensure complete distillation of water in the tar when a large amount of tar is processed; and the distilled water vapor is difficult to effectively discharge out of the system, and part of it condenses in the bottle mouth or pipeline and refluxes into the distillation flask, making it difficult to completely remove the water. Utility Model Content

[0005] The utility model aims to provide a coal tar dehydration device, which has the characteristics of simple installation and operation, thorough water separation, high dehydration efficiency and no irritating gas discharge.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A coal tar dehydration device comprises a distillation flask, a reflux condensate collector connected to the distillation flask, a first collecting bottle connected to the bottom of the reflux condensate collector, a serpentine tube condenser and a second collecting bottle connected in sequence to the top of the reflux condensate collector, wherein the reflux condensate collector is provided with a guide fan blade.

[0008] The working process of the coal tar dehydration device provided by the utility model is as follows: the coal tar sample is heated in a distillation flask to distill out water vapor components, part of which is condensed on the wall surface of the reflux condensate collector and refluxed into the first collection flask; part of which enters the serpentine tube condenser through the guide fan blades to condense and enters the second collection flask.

[0009] In the utility model, the distillation bottle can be a round-bottom distillation flask.

[0010] Furthermore, the reflux condensate collector is connected to the second collecting bottle via a steam guide tube and a serpentine tube condenser.

[0011] Furthermore, the lower part of the reflux condensate collector is an annular condensate collection tank, one side of which is open for guiding condensate into the first collection bottle; the upper part of the reflux condensate collector is connected to the steam guide pipe. A rubber sealing ring is provided at the connection between the reflux condensate collector and the round-bottom flask, and the reflux condensate collector and the round-bottom flask are well sealed to ensure that no distilled components of the entire device leak out of the system. One side of the annular condensate collection tank is opened and connected to the first collection bottle through a pipeline.

[0012] By adopting the above technical solution, the water vapor condensed on the pipe wall will flow into the annular condensed water collecting groove and enter the collecting bottle through the pipe connected thereto, thereby effectively reducing the reflux of condensed water into the distillation flask.

[0013] Furthermore, the second collecting bottle is connected to an activated carbon adsorption device.

[0014] By adopting the above technical solution, the activated carbon adsorption device is used to adsorb uncondensed water vapor or light oil components. The liquid condensed in the serpentine tube flows into the collection bottle along the pipeline, and the uncondensed gas components are discharged from the device after being adsorbed by the activated carbon, thereby reducing the emission of uncondensed water or light oil components to the environment, and the whole device has no irritating gas discharge.

[0015] The distillation flask is provided with a foldable stirring paddle.

[0016] The foldable stirring paddle is coaxially connected with the guide blade, and the rotation speeds of the foldable stirring paddle and the guide blade are both controlled by the stirring motor.

[0017] The impeller, guide blades and shaft are all wrapped with polytetrafluoroethylene material, which can protect the device from corrosion.

[0018] By adopting the above technical solution, the stirring paddle can make the various parts of coal tar mix and heat evenly, accelerate the emulsion demulsification and dehydration process, and the distilled water vapor will be quickly discharged under the action of the guide blades and enter the condensation device, reducing the condensation and reflux of water vapor on the pipe wall. The stirring paddle is coaxially connected with the guide blades to achieve coaxial stirring, and the distilled gas is guided while stirring, and a micro-negative pressure distillation is created, which is conducive to the discharge of distilled water.

[0019] Furthermore, the coal tar dehydration device comprises an electric heating jacket, the upper part of the distillation flask is covered with thermal insulation cotton, and the distillation flask is provided with a thermocouple slot.

[0020] Thermocouple can measure the temperature of coal tar sample in the flask, and the auxiliary electric heating jacket can control the heating temperature. The upper part of the distillation flask is covered with insulation cotton to prevent water vapor from condensing and refluxing above the flask.

[0021] The connection between the serpentine tube condenser and the steam guide tube is sealed with a frosted glass surface. The inside of the serpentine tube of the serpentine tube condenser is a steam channel, and the outside of the tube is circulating cooling water. The circulating cooling water is introduced from the bottom and led out from the top, forming a countercurrent arrangement with the steam.

[0022] Furthermore, raw tape can be wrapped around the frosted surface or vacuum silicone grease can be applied to enhance the sealing effect. The serpentine tube condenser is a shell and tube heat exchanger, with a steam channel inside the serpentine tube and a circulating cooling water channel outside the tube. The steam flows from top to bottom, and the circulating cooling water flows from bottom to top, and the two are arranged in countercurrent.

[0023] By adopting the above technical solution, the distilled water vapor enters the serpentine tube condenser through the steam guide pipe and condenses into liquid under the action of circulating cooling water. The serpentine tube heat exchanger increases the flow resistance on the steam side, improves the condensation efficiency, and can effectively reduce the volume of the condenser, thereby facilitating installation and layout.

[0024] The main part of the device provided by the utility model is made of organic glass material.

[0025] The utility model innovatively proposes a design scheme of gas-liquid coaxial stirring and an annular condensed water collecting tank, the combined effect of which can further promote the rapid discharge of distillation components, reduce the reflux of condensed liquid, and improve the distillation efficiency.

[0026] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0027] (1) For tar raw materials with low water content and high viscosity, stirring and heating can enhance the mixing and heat exchange of each part, so that the water can be removed completely; (2) The guide fan blades can make the distilled water vapor quickly enter the condenser, reducing the condensation reflux at the bottle mouth; (3) After the water condensed and refluxed on the wall enters the annular condensation collection tank, it enters the collection bottle through the conduit, avoiding reflux into the flask and improving the distillation efficiency; (4) The circulating water condenser adopts a serpentine countercurrent arrangement to increase the flow resistance on the gas side and improve the condensation effect; (5) The outlet of the entire device is arranged with activated carbon adsorption balls, which can remove uncondensed gas components and reduce the discharge of irritating gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a coal tar dehydration device provided in an embodiment of the utility model.

[0029] Figure 1 In: 1-electric heating jacket; 2-insulation cotton; 3-round bottom distillation flask; 4-thermocouple slot; 5-foldable stirring paddle; 6-guide fan blade; 7-reflux condensate collector; 8-stirring motor; 9-steam guide pipe; 10-serpentine tube condenser; 11-first collecting bottle; 12-second collecting bottle; 13-activated carbon adsorption device. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] like Figure 1 As shown, the coal tar dehydration device provided in this embodiment includes, from bottom to top, an electric heating jacket 1, a round-bottom distillation flask 3, a reflux condensate collector 7 and a stirring motor 8; the upper half of the round-bottom distillation flask 3 is covered with thermal insulation cotton 2, and the round-bottom distillation flask 3 is provided with a thermocouple slot 4 for inserting a thermocouple; a foldable stirring paddle 5 is provided in the round-bottom distillation flask 3; the lower part of the reflux condensate collector 7 is an annular condensate collecting groove, and one side of the annular condensate collecting groove is open for introducing condensate into a first collecting bottle 11 through a pipeline; the upper part of the reflux condensate collector 7 is connected to the second collecting bottle 12 through a steam guide pipe 9 and a serpentine tube condenser 10 in turn, and the second collecting bottle 12 is connected to an activated carbon adsorption device 13; a guide fan blade 6 coaxially connected to the foldable stirring paddle 5 is provided in the reflux condensate collector 7.

[0032] Among them, there is a rubber sealing ring at the connection between the reflux condensate collector 7 and the round-bottom distillation flask 3; the connection between the serpentine tube condenser 10 and the steam guide tube 9 is sealed with a frosted glass surface (raw material tape can be wrapped around the frosted surface or vacuum silicone grease can be applied to enhance the sealing effect), the serpentine tube of the serpentine tube condenser 10 is a steam channel, and the outside of the tube is circulating cooling water, and the circulating cooling water is introduced from the bottom and drawn out from the top, forming a countercurrent arrangement with the steam;

[0033] The use process of the coal tar dehydration device provided in this embodiment is as follows:

[0034] The coal tar sample is filled into a round-bottom distillation flask 3 with a volume of 1 L, and the coal tar filling amount is 1 / 2 to 2 / 3 of the volume of the flask. According to the water content and viscosity of the coal tar, an appropriate amount of zeolite and demulsifier (optional) are added to the coal tar sample.

[0035] Place the round bottom distillation flask 3 on the electric heating jacket 1, insert the thermocouple into the thermocouple slot 4, and evenly apply the insulation cotton 2 of appropriate thickness on the upper part of the round bottom distillation flask 3. Adjust the height of the electric heating table so that the rubber ring at the connection between the bottle mouth of the round bottom distillation flask 3 and the reflux condensate collector 7 is well sealed, and the foldable stirring paddle 5 is immersed in the coal tar sample at an appropriate position.

[0036] The circulating cooling water inlet is connected to the lower interface of the serpentine tube condenser 10, and the outlet is connected to the upper interface to form a countercurrent arrangement, and the circulating cooling water is adjusted to a suitable flow rate.

[0037] Set the heating temperature to 100°C, adjust the stirring motor 8 to a suitable speed, and wait for the device to heat up. When the coal tar sample is heated to 100°C, adjust the speed of the stirring motor 8 according to the boiling condition of the coal tar sample.

[0038] During the distillation process, part of the water vapor component condenses on the wall of the reflux condensate collector 7, flows along the wall to the collection tank below the reflux condensate collector 7, and enters the first collection bottle 11 through the outlet on one side of the collection tank. The remaining water vapor components enter the serpentine tube condenser 10 along the steam guide pipe 9 under the action of the guide fan blade 6, condense in the serpentine tube, and enter the second collection bottle 12 along the pipeline. The uncondensed components enter the activated carbon adsorption device 13 from the outlet of the second collection bottle 12, and are discharged from the coal tar dehydration device after adsorption treatment.

[0039] When no more liquid flows into the first collection bottle 11 and the second collection bottle 12, and no water vapor condenses on the wall of the reflux condensate collector 7 and the serpentine condenser 10, the distillation process is finished, the heating power is turned off, and the speed of the stirring motor 8 is reduced. When the coal tar sample drops to a certain temperature, the stirring motor 8 and the circulating cooling water are turned off.

[0040] By adopting the above-mentioned coal tar dehydration device, the coal tar sample is heated in the round-bottom distillation flask 3 to distill out the water vapor component, part of which is condensed on the wall of the reflux condensate collector 7 and refluxed into the first collecting bottle 11; part of it enters the serpentine tube condenser 10 through the guide fan blades 6 to condense and enters the second collecting bottle 12, and the uncondensed components are discharged through the activated carbon adsorption device 13; it has the characteristics of complete water separation, high dehydration efficiency, and no irritating gas discharge.

[0041] The embodiments of this specific implementation method are preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Any equivalent changes made by technicians familiar with the technical field based on the structure, shape, and principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A coal tar dehydration device, characterized in that: The coal tar dehydration device comprises a distillation flask (3), a reflux condensate collector (7) connected to the distillation flask (3), a first collecting flask (11) connected to the bottom of the reflux condensate collector (7), a serpentine tube condenser (10) and a second collecting flask (12) connected in sequence to the top of the reflux condensate collector (7), and a guide fan blade (6) is provided in the reflux condensate collector (7).

2. The coal tar dehydration device according to claim 1, characterized in that: The reflux condensate collector (7) is connected to the second collecting bottle (12) via a steam guide tube (9) and a serpentine condenser (10).

3. The coal tar dehydration device according to claim 2, characterized in that: The lower part of the reflux condensate collector (7) is an annular condensate collecting groove, one side of which is open for guiding the condensate into the first collecting bottle (11); the upper part of the reflux condensate collector (7) is connected to the steam guide pipe (9).

4. The coal tar dehydration device according to claim 2, characterized in that: The second collecting bottle (12) is connected to an activated carbon adsorption device (13).

5. The coal tar dehydration device according to claim 1, characterized in that: The distillation flask (3) is provided with a foldable stirring paddle (5).

6. The coal tar dehydration device according to claim 5, characterized in that: The foldable stirring paddle (5) is coaxially connected to the guide blade (6), and the rotation speeds of the foldable stirring paddle (5) and the guide blade (6) are both controlled by a stirring motor (8).

7. The coal tar dehydration device according to claim 1, characterized in that: The coal tar dehydration device comprises an electric heating jacket (1), the upper part of the distillation flask (3) is covered with heat-insulating cotton (2), and the distillation flask (3) is provided with a thermocouple slot (4).

8. The coal tar dehydration device according to claim 1, characterized in that: The connection between the serpentine tube condenser (10) and the steam guide tube (9) is sealed with a frosted glass surface. The inside of the serpentine tube of the serpentine tube condenser (10) is a steam channel, and the outside of the tube is circulating cooling water. The circulating cooling water is introduced from the bottom and led out from the top, forming a countercurrent arrangement with the steam.

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