Continuous dehydration unit for producing alkyl ketene dimer

Abstract

The utility model discloses a continuous dehydration device for producing alkyl ketene dimer, comprising a preheater, a feed pipe is provided on the top of the preheater, the preheater is connected with a dehydration assembly for producing alkyl ketene dimer, the dehydration assembly comprises: an evaporation member connected to the preheater and used for heating and dehydrating the alkyl ketene dimer, the evaporation member comprises a tower body fixedly connected to the discharge end of the preheater, and the utility model relates to the technical field of chemical dehydration. The continuous dehydration device for producing alkyl ketene dimer allows the motor, gear assembly, distribution plate, tube array, stirring rod, casing, bevel gear assembly, and fan blades to cooperate with each other, so that the steam ejected from the steam pipe is in full contact with a plurality of tube arrays, accelerating evaporation while improving the extraction efficiency of water vapor, thereby improving the dehydration efficiency and reducing waste, and making the concentration of alkyl ketene dimer in the storage shell uniform by stirring.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical dehydration, in particular to a continuous dehydration device for producing alkyl ketene dimer. Background Art

[0002] Alkyl ketene dimer is a papermaking sizing agent. During its production process, a corresponding continuous dehydration device is required to dehydrate its raw materials. The continuous dehydration device for producing alkyl ketene dimer disclosed in reference publication number CN208406125U includes a preheater, an evaporator, and a gas condenser. The outlet of the preheater is connected to the inlet of the evaporator through a pipeline to prevent the product from being in contact with water at high temperature for a long time, resulting in hydrolysis, thereby improving product quality. As described in the above patent, when the existing continuous dehydration device is used, its heating steam is only used to blow and heat several groups of fixed tubes. The heating efficiency of steam on the tubes is low, which leads to waste. In addition, the device fails to accelerate the extraction of evaporated water vapor, which is easy to affect subsequent dehydration operations. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a continuous dehydration device for producing alkyl ketene dimer, which solves the problem that the device fails to effectively handle the problem of low efficiency of tube heating evaporation, resulting in waste.

[0004] To achieve the above object, the utility model is implemented by the following technical scheme: a continuous dehydration device for producing alkyl ketene dimer, comprising a preheater, a feed pipe is provided on the top of the preheater, and the preheater is connected to a dehydration component for producing alkyl ketene dimer, and the dehydration component comprises:

[0005] An evaporator connected to the preheater and used for heating and dehydrating the alkyl ketene dimer, the evaporator comprising a tower body fixedly connected to the discharge end of the preheater, a motor is provided on the right side of the top of the tower body, a gear assembly is connected to the output end of the lower side of the motor, two groups of distribution plates coaxially and fixedly connected to the driven gear in the gear assembly are rotatably connected to the inner side of the tower body, a plurality of groups of tubes are provided between the two groups of distribution plates, a material storage shell is fixedly connected to the bottom of the tower body, an exhaust pipe assembly is connected to the upper right end of the tower body and the material storage shell, a stirring rod is coaxially and fixedly connected to the bottom of the distribution plate near the inner side of the material storage shell, and a steam guide driven by a motor is installed on the inner side of the tower body and the material storage shell near the left end of the exhaust pipe assembly;

[0006] The condenser is installed on the right side of the exhaust pipe assembly for liquefaction of water vapor; the discharge piece is installed at the bottom of the storage shell for the discharge treatment of alkyl ketene dimer; the steam pipe is installed on the left side of the tower body and located between the two sets of distribution plates for the introduction of heating steam; the liquid discharge pipe is installed on the lower left side of the tower body corresponding to the steam pipe for liquid discharge.

[0007] Preferably, a valve is provided at the bottom of the preheater, a connecting pipe fixedly connected to the tower body is installed at the lower end of the valve, and the output end of the motor is coaxially fixedly connected to the driving gear in the gear assembly.

[0008] Preferably, the distribution plate is cylindrical and has distribution holes near the tube ends, the inner ends of the tubes are hollow and connected to the distribution holes, and the lower inner edge of the storage shell is provided with a liquid concentration sensor electrically connected to an external controller.

[0009] Preferably, the steam guide part includes two groups of casings which are respectively fixedly connected to the tower body and the storage shell, the inner end of the casing is connected to a bevel gear assembly, the driving bevel gear in the bevel gear assembly is coaxially fixedly connected to the output end of the motor, the driven bevel gear in the bevel gear assembly is coaxially fixedly connected to the fan blades, and the fan blades are rotatably connected to the casing.

[0010] Preferably, the discharge component includes a solenoid valve installed at the bottom of the storage shell, a liquid pump is connected to the bottom of the solenoid valve, a three-way valve is fixedly connected to the discharge end of the liquid pump, the three-way valve is respectively fixedly connected to a discharge pipe and a reflux pipe, and the reflux pipe is fixedly connected to the top right end of the preheater.

[0011] Preferably, the right side of the liquid discharge pipe is located between two sets of distribution plates, and the driving gear and the driven gear in the gear assembly are meshed with each other.

[0012] Beneficial Effects

[0013] The utility model provides a continuous dehydration device for producing alkyl ketene dimer. Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The continuous dehydration device for producing alkyl ketene dimer has an evaporating element arranged in the device, and the motor, gear assembly, distribution plate, tube array, stirring rod, housing, bevel gear assembly, and fan blade cooperate with each other, so that the steam ejected from the steam pipe is fully in contact with a plurality of tube arrays, thereby accelerating evaporation and improving the extraction efficiency of water vapor, thereby improving the dehydration efficiency and reducing waste. Moreover, the concentration of alkyl ketene dimer in the storage shell is made uniform by stirring, which is helpful for the subsequent accurate detection of the concentration of alkyl ketene dimer.

[0015] (2) The continuous dehydration device for producing alkyl ketene dimer is provided with a discharge member in the device, and a liquid concentration sensor is used to monitor the concentration of alkyl ketene dimer. The electromagnetic valve, liquid pump, three-way valve, discharge pipe and reflux pipe cooperate with each other to realize the discharge or secondary dehydration of alkyl ketene dimer according to the concentration of alkyl ketene dimer in the storage shell, thereby improving the dehydration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the evaporation component and the discharge component of the utility model;

[0018] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0019] In the figure: 1. preheater; 2. feed pipe; 3. evaporator; 31. tower body; 32. motor; 33. gear assembly; 34. distribution plate; 35. tube array; 36. storage shell; 37. exhaust pipe assembly; 38. stirring rod; 39. steam guide; 391. casing; 392. bevel gear assembly; 393. fan blade; 4. condenser; 5. discharge part; 51. solenoid valve; 52. liquid pump; 53. three-way valve; 54. discharge pipe; 55. reflux pipe; 6. steam pipe; 7. liquid discharge pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-2 The first embodiment shown is a continuous dehydration device for producing alkyl ketene dimer, comprising a preheater 1, a feed pipe 2 is provided on the top of the preheater 1, and a dehydration component for producing alkyl ketene dimer is connected to the preheater 1, and the dehydration component comprises:

[0022] The evaporator 3 is connected to the preheater 1 and is used for heating and dehydrating the alkyl ketene dimer. The evaporator 3 includes a tower body 31 fixedly connected to the discharge end of the preheater 1. A motor 32 is provided on the right side of the top of the tower body 31. A gear assembly 33 is connected to the output end of the lower side of the motor 32. Two groups of distribution plates 34 coaxially and fixedly connected to the driven gear in the gear assembly 33 are rotatably connected inside the tower body 31. A plurality of groups of tubes 35 are provided between the two groups of distribution plates 34. A storage shell 36 is fixedly connected to the bottom of the tower body 31. The upper right ends of the tower body 31 and the storage shell 36 are both connected to an exhaust pipe assembly 37. A stirring rod 38 is coaxially and fixedly connected to the inner side of the storage shell 36 at the bottom of the distribution plate 34. A steam guide 39 driven by the motor 32 is installed near the left end of the exhaust pipe assembly 37 on the inner side of the tower body 31 and the storage shell 36.

[0023] Condenser 4, installed on the right side of exhaust pipe assembly 37 for water vapor liquefaction; discharge piece 5, installed at the bottom of storage shell 36 for alkyl ketene dimer discharge treatment; steam pipe 6, installed on the left side of tower body 31 and located between two sets of distribution plates 34 for heating steam introduction; liquid discharge pipe 7, corresponding to steam pipe 6, installed on the lower left side of tower body 31 for liquid discharge; a valve is provided at the bottom of preheater 1, and a connecting pipe fixedly connected to tower body 31 is installed at the lower end of the valve, and the output end of motor 32 is coaxially fixedly connected to the driving gear in gear assembly 33; distribution plate 34 is cylindrical and A distribution hole is provided near the end of the array tube 35, the inner end of the array tube 35 is hollow and connected to the distribution hole, and a liquid concentration sensor electrically connected to an external controller is provided at the lower end edge of the storage shell 36; the steam guide 39 includes two sets of housings 391 respectively fixedly connected to the tower body 31 and the storage shell 36, and a bevel gear assembly 392 is connected to the inner end of the housing 391, the driving bevel gear in the bevel gear assembly 392 is coaxially fixedly connected to the output end of the motor 32, the driven bevel gear in the bevel gear assembly 392 is coaxially fixedly connected to the fan blade 393, and the fan blade 393 is rotatably connected to the housing 391;

[0024] The right side of the liquid discharge pipe 7 is located between the two groups of distribution plates 34. The driving gear and the driven gear in the gear assembly 33 are meshed with each other, and the number of teeth of the driving gear is less than that of the driven gear. The motor 32, the gear assembly 33, the distribution plate 34, the array tubes 35, the stirring rod 38, the housing 391, the bevel gear assembly 392, and the fan blades 393 cooperate with each other to make the steam ejected from the steam pipe 6 fully contact with the plurality of array tubes 35, accelerate evaporation, improve the extraction efficiency of water vapor, and thus improve the dehydration efficiency. The concentration of alkyl ketene dimer in the storage shell 36 is made uniform by stirring.

[0025] like Figure 1-2 The second embodiment shown is mainly different from the first embodiment in that:

[0026] The discharge member 5 comprises a solenoid valve 51 installed at the bottom of the storage shell 36, a liquid pump 52 is connected to the bottom of the solenoid valve 51, a three-way valve 53 is fixedly connected to the discharge end of the liquid pump 52, a discharge pipe 54 and a reflux pipe 55 are respectively fixedly connected to the three-way valve 53, and the reflux pipe 55 is fixedly connected to the top right end of the preheater 1. The liquid concentration sensor monitors the concentration of the alkyl ketene dimer. When the water content of the alkyl ketene dimer reaches the required requirement, the solenoid valve 51 and the liquid pump 52 are opened, and the alkyl ketene dimer liquid is discharged to the recovery end through the solenoid valve 51, the liquid pump 52, the three-way valve 53, and the discharge pipe 54. If the water content of the alkyl ketene dimer does not meet the standard, the three-way valve 53 is reversed, and the solenoid valve 51 and the liquid pump 52 are opened. At this time, the liquid pump 52 guides the alkyl ketene dimer back to the preheater 1 through the three-way valve 53 and the reflux pipe 55, and the dehydration operation is repeated.

[0027] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0028] When in use, the user starts the preheater 1, the motor 32, the condenser 4, and the liquid concentration sensor, and allows the heating steam to be injected into the two sets of distribution plates 34 through the steam pipe 6, and the steam is cooled and liquefied and discharged through the drain pipe 7, and the alkyl ketene dimer solution to be dehydrated is introduced into the preheater 1 through the feed pipe 2. The preheater 1 performs heat treatment on the alkyl ketene dimer. After the alkyl ketene dimer solution reaches a suitable temperature, the valve at the lower end of the preheater 1 is opened, and the alkyl ketene dimer solution is introduced into the upper side of the tower body 31 through the connecting pipe. At the same time, the motor 32 is driven by the gear The wheel assembly 33 drives the distribution plate 34, the array of tubes 35, and the stirring rod 38 to rotate and make the bevel gear assembly 392 operate. The distribution plate 34 at the upper end of the tower body 31 first receives the alkyl ketene dimer solution, and the alkyl ketene dimer solution is introduced into the plurality of arrays of tubes 35 through the distribution holes on the distribution plate 34 and flows downward. The steam pipe 6 sprays the heating steam to evenly blow the rotating plurality of arrays of tubes 35 to achieve uniform heating. The alkyl ketene dimer solution flowing through the array of tubes 35 is heated by heat exchange to promote the evaporation of water in the alkyl ketene dimer.

[0029] Part of the evaporated water vapor gathers on the upper side of the tower body 31, and the other part of the evaporated water vapor gathers on the upper end of the storage shell 36, and the bevel gear assemblies 392 in the two sets of steam guide members 39 drive the fan blades 393 to rotate, so as to promote the water vapor gathered on the upper side of the tower body 31 and the storage shell 36 to be introduced into the condenser 4 through the exhaust pipe assembly 37, and the condenser 4 liquefies the water vapor, and the dehydrated alkyl ketene dimer gathers on the lower end of the storage shell 36, and the rotating stirring rod 38 stirs the alkyl ketene dimer to promote the uniform concentration of the alkyl ketene dimer, and the liquid concentration sensor monitors the concentration of the alkyl ketene dimer. When the water content of the alkyl ketene dimer reaches the required requirement, the solenoid valve 51 and the liquid pump 52 are opened, and the alkyl ketene dimer liquid is discharged to the recovery end through the solenoid valve 51, the liquid pump 52, the three-way valve 53, and the discharge pipe 54. Among them, the preheater 1, the condenser 4, and the liquid concentration sensor are all existing technologies, and their specific working principles are not repeated here.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous dehydration device for producing alkyl ketene dimer, comprising a preheater, characterized in that: The top of the preheater is provided with a feed pipe, and the preheater is connected with a dehydration assembly for the production of alkyl ketene dimer, and the dehydration assembly comprises: An evaporator connected to the preheater and used for heating and dehydrating the alkyl ketene dimer, the evaporator comprising a tower body fixedly connected to the discharge end of the preheater, a motor is provided on the right side of the top of the tower body, a gear assembly is connected to the output end of the lower side of the motor, two groups of distribution plates coaxially and fixedly connected to the driven gear in the gear assembly are rotatably connected to the inner side of the tower body, a plurality of groups of tubes are provided between the two groups of distribution plates, a material storage shell is fixedly connected to the bottom of the tower body, an exhaust pipe assembly is connected to the upper right end of the tower body and the material storage shell, a stirring rod is coaxially and fixedly connected to the bottom of the distribution plate near the inner side of the material storage shell, and a steam guide driven by a motor is installed on the inner side of the tower body and the material storage shell near the left end of the exhaust pipe assembly; The condenser is installed on the right side of the exhaust pipe assembly for liquefaction of water vapor; the discharge piece is installed at the bottom of the storage shell for the discharge treatment of alkyl ketene dimer; the steam pipe is installed on the left side of the tower body and located between the two sets of distribution plates for the introduction of heating steam; the liquid discharge pipe is installed on the lower left side of the tower body corresponding to the steam pipe for liquid discharge.

2. The continuous dehydration device for producing alkyl ketene dimer according to claim 1, characterized in that: A valve is provided at the bottom of the preheater, a connecting pipe fixedly connected to the tower body is installed at the lower end of the valve, and the output end of the motor is coaxially fixedly connected to the driving gear in the gear assembly.

3. The continuous dehydration device for producing alkyl ketene dimer according to claim 1, characterized in that: The distribution plate is cylindrical and has distribution holes near the tube ends. The inner ends of the tubes are hollow and connected to the distribution holes. The lower inner edge of the storage shell is provided with a liquid concentration sensor electrically connected to an external controller.

4. The continuous dehydration device for producing alkyl ketene dimer according to claim 1, characterized in that: The steam guide member includes two sets of casings respectively fixedly connected to the tower body and the storage shell, the inner end of the casing is connected to a bevel gear assembly, the driving bevel gear in the bevel gear assembly is coaxially fixedly connected to the output end of the motor, the driven bevel gear in the bevel gear assembly is coaxially fixedly connected to the fan blades, and the fan blades are rotatably connected to the casing.

5. The continuous dehydration device for producing alkyl ketene dimer according to claim 1, characterized in that: The discharge part includes a solenoid valve installed at the bottom of the storage shell, a liquid pump is connected to the bottom of the solenoid valve, a three-way valve is fixedly connected to the discharge end of the liquid pump, and the three-way valve is respectively fixedly connected to a discharge pipe and a reflux pipe, and the reflux pipe is fixedly connected to the right end of the top of the preheater.

6. The continuous dehydration device for producing alkyl ketene dimer according to claim 1, characterized in that: The right side of the liquid discharge pipe is located between two groups of distribution plates, and the driving gear and the driven gear in the gear assembly are meshed with each other.

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