Pulse intermittent water vapor bottom blowing coupling mechanical stirring enhanced mixing device

Abstract

The invention relates to the technical field of chemical reaction equipment, in particular to a pulse intermittent water vapor bottom blowing coupling mechanical stirring enhanced mixing device which comprises a tank body, a sealing cover is mounted on the top surface of the tank body, a stirring assembly used for stirring the interior of the tank body is mounted on the sealing cover, the stirring assembly extends into the tank body, and the stirring assembly is connected with the tank body. An air outlet head is arranged at the bottom in the tank body, the air outlet head is communicated with a steam generation unit through an air supply pipe, and the steam generation unit is electrically connected with a pulse control unit used for sending variable frequency signals with adjustable pulse frequency to the steam generation unit. The steam injection frequency is controlled through the pulse control unit, the use amount of the steam is reduced, local high temperature generated by the system during continuous injection is avoided, the temperature is more uniform, meanwhile, convection can be further strengthened through nonlinear input, the periodic structure of the system is damaged, and the service life of the system is prolonged. And more chaotic flow regions are formed to enhance mixing and heat transfer efficiency, so that the production efficiency is improved, and the energy loss is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of chemical reaction equipment, in particular to a pulse intermittent water vapor bottom blowing coupled with mechanical stirring and intensified mixing device. Background Art

[0002] A reactor is a comprehensive reaction vessel, and its structure, functions, and accessories are designed according to the reaction conditions. The agitator in the reactor is a process-enhancing device widely used in chemical, metallurgical, and crystal growth fields. The main purpose of this operating unit is to mix materials evenly. In conventional industrial processes, the impeller's rotation speed is limited due to the agitator's component bearing capacity, which limits the mixing efficiency of mechanical agitation. As a result, the materials cannot be fully mixed during the agitation process. In response to a single agitation method, the industry has proposed a method of improving the mixing efficiency by injecting steam from the bottom while maintaining the system temperature. However, continuous steam injection results in low steam utilization, resulting in high energy consumption. At the same time, the single steam injection method coupled with a single agitation method may also form periodic motion within the system. Continuous steam injection can cause local overheating in the reactor, resulting in system imbalance. Therefore, there is an urgent need for a pulsed intermittent steam bottom blowing coupled with mechanical agitation to enhance mixing. This device can not only effectively reduce steam usage, but also effectively avoid the local high temperatures generated in the reactor during continuous steam injection, making the temperature in the reactor more balanced. Summary of the Invention

[0003] The purpose of the present invention is to provide a pulsed intermittent water vapor bottom blowing coupled with mechanical stirring and intensified mixing device to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: a pulse intermittent water vapor bottom blowing coupled mechanical stirring enhanced mixing device, comprising a tank body, a sealing cover is installed on the top surface of the tank body, a stirring assembly for stirring the interior of the tank body is installed on the sealing cover, the stirring assembly extends into the tank body, and an air outlet head is provided at the bottom of the tank body, the air outlet head is connected to a steam generating unit through an air supply pipe, and the steam generating unit is electrically connected to a pulse control unit for sending a variable frequency signal with adjustable pulse frequency to the steam generating unit.

[0005] Preferably, the stirring assembly includes a driving motor fixedly connected to the center of the top surface of the sealing cover, the output shaft of the driving motor is transmission-connected to a stirring shaft, and the stirring shaft extends into the tank body and is fixedly connected to a plurality of stirring paddles in the circumferential direction.

[0006] Preferably, the stirring shaft and the gas outlet head are arranged opposite to each other, and a gap is left between the stirring shaft and the gas outlet head.

[0007] Preferably, the air supply pipe extends into the tank body and is communicated with the air outlet head.

[0008] Preferably, the air outlet head is provided with a plurality of air outlet holes, one end of all the air outlet holes is connected to the tank body, and the other end of all the air outlet holes is connected to the air supply pipe.

[0009] Preferably, a plurality of the air outlet holes are arranged in a ring shape at equal intervals on the air outlet head.

[0010] Preferably, a cavity is formed on one end of the air outlet head facing the air supply pipe, and the cavity is communicated with the air supply pipe.

[0011] Preferably, the inner diameter of the cavity is adapted to the outer diameter of the air supply pipe.

[0012] Preferably, a mass flow meter for monitoring steam flow is installed on the steam generating unit.

[0013] The present invention discloses the following technical effects:

[0014] The present invention controls the steam blowing frequency through a pulse control unit, thereby reducing the amount of steam used, avoiding local high temperatures generated by the system during continuous blowing, and making the temperature more uniform. At the same time, nonlinear input can further enhance convection, destroy the periodic structure of the system, and form more chaotic flow areas to enhance mixing and heat transfer efficiency, improve production efficiency, and reduce energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the cylinder of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the gas outlet head from a top view of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the gas outlet head of the present invention when viewed from above;

[0020] Figure 5 This is the waveform diagram of the pulse frequency conversion function of the present invention;

[0021] Figure 6This is a schematic diagram of the top view of the gas outlet head according to the second embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the air outlet head in a bottom view according to the second embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the connection structure between the air outlet head and the air supply pipe in the second embodiment of the present invention;

[0024] Figure 9 This is a schematic cross-sectional view of the gas outlet head according to the second embodiment of the present invention;

[0025] Figure 10 Schematic diagram of the ring structure of the present invention;

[0026] Among them, 1. Cylinder; 2. Air outlet head; 3. Drive motor; 4. Stirring shaft; 5. Stirring paddle; 6. Steam generating unit; 7. Pulse control unit; 8. Mass flow meter; 11. Sealing cover; 21. Air supply pipe; 22. Air outlet hole; 23. Cavity; 24. Air supply groove; 25. Air outlet pipe; 26. Ring; 27. Slide groove. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] Reference Figure 1-Figure 5 The present invention provides a pulse intermittent water steam bottom blowing coupled mechanical stirring enhanced mixing device, including a tank body 1, a sealing cover 11 is installed on the top surface of the tank body 1, a stirring component for stirring the inside of the tank body 1 is installed on the sealing cover 11, the stirring component extends into the tank body 1, and an air outlet head 2 is provided at the bottom of the tank body 1, the air outlet head 2 is connected to a steam generating unit 6 through an air supply pipe 21, and the steam generating unit 6 is electrically connected to a pulse control unit 7 for sending a variable frequency signal with an adjustable pulse frequency to the steam generating unit 6.

[0031] The reactor is a comprehensive reaction vessel, and its structure, functions, and accessories can be designed according to the reaction conditions. From the initial feeding, reaction, and discharge, the pre-set reaction steps can be completed with a high degree of automation, and important parameters such as temperature, pressure, mechanical control (stirring, air blowing, etc.), and reactant / product concentrations can be strictly controlled during the reaction.

[0032] The reactor is usually composed of a reactor body (tank body 1), a reactor cover (sealing cover 11), a transmission device, a stirring device, a heating device, a cooling device, a sealing device; and corresponding auxiliary equipment: a distillation column, a condenser, a water separator, a collection tank, a filter, etc.

[0033] The kettle body and lid utilize gaskets or tapered surfaces in line contact with arc-shaped surfaces. Tightening the main nut compresses them against each other to achieve a good seal. When tightening the nut, apply force evenly and diagonally, gradually and repeatedly, and do not allow the lid to tilt to one side. To ensure a good seal, do not exceed the specified tightening torque range when tightening the main nut to prevent damage to the sealing surfaces or excessive wear. The sealing surfaces require special care. Before each installation, wipe the upper and lower sealing surfaces clean with a soft paper or cloth, taking special care to avoid scratching the sealing surfaces of the kettle body and lid. If handled properly, the kettle body and lid can be used for over 10,000 cycles. Damage to the sealing surfaces requires reprocessing and repair to achieve a good seal. When removing the lid, lift it up and down slowly to prevent the sealing surfaces between the kettle body and lid from colliding. If the seal is sealed with a gasket (PTFE, aluminum, copper, asbestos, etc.), tightening the main nut will achieve a good seal.

[0034] The Pulse Control Unit (PCU) is an electronic or automated device / module used to generate, regulate, or manage pulse signals. It is widely used in industrial control, communications, power electronics, medical equipment, laser technology, and other fields. It precisely controls the frequency, width, amplitude, and phase of pulses to achieve precise control of devices or systems.

[0035] The steam generating unit 6 is a mechanical device that utilizes the thermal energy of fuel or other energy sources to heat water and convert it into steam.

[0036] The pulse control unit 7 controls the input frequency of the steam generating unit 6 to achieve intermittent steam blowing.

[0037] The present invention controls the steam blowing frequency through the pulse control unit 7, thereby reducing the amount of steam used, avoiding local high temperatures generated by the system during continuous blowing, and making the temperature more uniform. At the same time, nonlinear input can further enhance convection, destroy the periodic structure of the system, and form more chaotic flow areas to enhance mixing and heat transfer efficiency, improve production efficiency, and reduce energy loss.

[0038] In a further optimized solution, the stirring assembly includes a drive motor 3 fixedly connected to the center of the top surface of the sealing cover 11. The output shaft of the drive motor 3 is drivingly connected to the stirring shaft 4. The stirring shaft 4 extends into the tank body 1 and is fixedly connected to a plurality of stirring paddles 5 on the circumference. The drive motor 3 drives the stirring shaft 4 to rotate, and the stirring shaft 4 drives the stirring paddles 5 to rotate, so that the stirring paddles 5 can mix the materials more thoroughly.

[0039] The stirring paddle 5 is a 45° axial flow paddle.

[0040] In a further optimized solution, the stirring shaft 4 is arranged opposite to the gas outlet head 2, and a gap is left between the stirring shaft 4 and the gas outlet head 2. The plurality of stirring paddles 5 above the gas outlet head 2 can fully mix the steam and the material.

[0041] According to a further optimized solution, the air supply pipe 21 extends into the tank body 1 and is connected to the air outlet head 2.

[0042] To further optimize the solution, a plurality of air outlet holes 22 are provided on the air outlet head 2 , one end of all the air outlet holes 22 is connected to the tank body 1 , and the other end of all the air outlet holes 22 is connected to the air supply pipe 21 .

[0043] In a further optimized solution, a plurality of air outlet holes 22 are equally spaced and arranged in a circular shape on the air outlet head 2. That is, the plurality of air outlet holes 22 adopt a circular multi-channel design, and the channels have the same diameter and the same spacing angle.

[0044] As a further optimization solution, a cavity 23 is formed at one end of the gas outlet head 2 facing the gas supply pipe 21, and the cavity 23 is connected to the gas supply pipe 21, so that the steam is sprayed vertically into the tank body 1.

[0045] In a further optimized solution, the inner diameter of the cavity 23 is adapted to the outer diameter of the air supply pipe 21 .

[0046] To further optimize the solution, a mass flow meter 8 for monitoring the steam flow is installed on the steam generating unit 6.

[0047] The mass flowmeter 8 is based on the Coriolis force. Inside the sensor, there are two parallel flow tubes, with a drive coil in the middle and detection coils at both ends. When the excitation voltage provided by the transmitter is applied to the drive coil, the vibrating tubes vibrate back and forth. The fluid medium from the industrial process flowing through the sensor's vibrating tubes generates a Coriolis effect on the tubes, causing the two tubes to vibrate torsionally. The detection coils installed at both ends of the tubes generate two signals with different phases. The phase difference between these two signals is proportional to the mass flow rate of the fluid passing through the sensor. A computer calculates the mass flow rate through the vibrating tubes. Different media flowing through the sensor have different main vibration frequencies of the vibrating tubes, which is used to calculate the medium density. A platinum resistor installed on the sensor's vibrating tubes indirectly measures the medium's temperature.

[0048] The mass flow meter 8 directly measures the mass flow of the medium passing through the flow meter, and can also measure the density of the medium and indirectly measure the temperature of the medium.

[0049] The mass flow meter 8 uses thermal measurement to measure the flow rate by measuring the molecular mass carried away by the split molecules. Because it uses thermal measurement, the measurement results will not be affected by changes in gas temperature and pressure.

[0050] The pulse control unit 7 is connected to the control system of the steam generating unit 6, and the pulse control unit 7 replaces the valve of the steam generating unit 6 to control the output frequency of steam. At the same time, a mass flow meter 8 is installed on the steam generating unit 6 to monitor the steam flow in real time.

[0051] Reference Figure 5 The steam generating unit 6 is controlled by a function waveform to regulate the steam blowing frequency; the water vapor bottom pulse coupled mechanical stirring is realized to enhance the mixing, and the periodic motion of the system is broken by the nonlinear input at the bottom, the chaotic area of the system is enhanced, and the material mixing is more complete.

[0052] The pulse control unit 7 controls the pulse based on a cycle, and the pulse duration of a single cycle is 50%.

[0053] The mass flow rate of pulse injection is consistent with that of continuous constant-speed injection, and the total duration of pulse injection is reduced by half compared with continuous injection.

[0054] The function pulse period in the pulse control unit 7 can be shortened, thereby reducing the time interval between single pulses.

[0055] The steam pulse injection method intermittently injects steam into the system within a cycle, and the injection time accounts for 50% of a single cycle. The maximum mass flow rate of intermittent steam injection is the same as the continuous injection mass flow rate, so the injection method of the present invention can effectively reduce the steam usage by half.

[0056] The present invention controls the input frequency of steam through the pulse control unit 7, reduces the amount of steam used, improves the utilization rate of steam, reduces the heat imbalance in some areas within the system, and avoids the formation of periodic motion through nonlinear input, thereby effectively improving the mixing efficiency.

[0057] Example 2

[0058] In order to increase the pressure of steam entering the tank body 1, the air outlet 22 adopts a tapered channel, with the end of the air outlet 22 with a smaller inner diameter facing the air supply pipe 21 and the end of the air outlet 22 with a larger inner diameter facing the inside of the tank body 1.

[0059] Example 3

[0060] A baffle is added to the wall of the tank 1 to enhance the axial strength of the system flow.

[0061] Example 4

[0062] Reference Figures 6-10 In order to improve the fluidity of steam ejected from the air outlet head 2, a number of air outlet pipes 25 are arranged at equal intervals in the circumferential direction of the air outlet head 2. All the air outlet pipes 25 are connected to an air supply groove 24. The air supply groove 24 is provided in the side wall of the tank body 1. The air supply groove 24 is connected to the air supply pipe 21 through the cavity 23. One end of the air supply pipe 21 extending into the cavity 23 is fixedly connected to a ring 26, and the ring 26 is slidably connected to a slide groove 27. The slide groove 27 is provided on the inner wall of the cavity 23. At the same time, one end face of the air supply pipe 21 extending into the cavity 23 is located between the slide groove 27 and the air supply groove 24, so that the loose steam in the air supply pipe 21 can effectively enter the air supply groove 24 and the air outlet 22.

[0063] When the steam is transported to the cavity 23 through the air supply pipe 21, part of the steam in the cavity 23 is sprayed into the tank body 1 through the air outlet 22, and the other part of the steam is sprayed out from the air outlet pipe 25 through the air supply groove 24. After the steam is sprayed out from the air outlet pipe 25, the thrust of the steam causes the air outlet head 2 to rotate. At this time, the slide groove 27 rotates along the ring 26, effectively improving the fluidity of the steam sprayed from the air outlet head 2.

[0064] The present invention couples mechanical stirring with intermittent pulse steam injection, and controls the intermittent input of steam through the pulse control unit 7, thereby destroying the periodic motion of the system, enhancing the chaos of the flow, and avoiding the formation of mixed isolation zones that lead to a decrease in mixing efficiency. At the same time, the intermittent steam injection method can reduce the system's demand for steam, thereby reducing the energy consumption of the steam generator and further reducing energy losses in the industrial production process; it is particularly suitable for mixing high-viscosity materials, gas-liquid-solid multiphase reactions and high-temperature and high-pressure working conditions.

[0065] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0066] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device, characterized by: The invention comprises a tank body (1), wherein a sealing cover (11) is installed on the top surface of the tank body (1), a stirring assembly for stirring the interior of the tank body (1) is installed on the sealing cover (11), the stirring assembly extends into the tank body (1), an air outlet head (2) is provided at the bottom of the tank body (1), the air outlet head (2) is connected to a steam generating unit (6) through an air supply pipe (21), and the steam generating unit (6) is electrically connected to a pulse control unit (7) for sending a variable frequency signal with an adjustable pulse frequency to the steam generating unit (6).

2. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 1, characterized in that: The stirring assembly comprises a driving motor (3) fixedly connected to the center of the top surface of the sealing cover (11); the output shaft of the driving motor (3) is drivingly connected to a stirring shaft (4); and the stirring shaft (4) extends into the tank body (1) and is fixedly connected to a plurality of stirring paddles (5) in the circumferential direction.

3. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 2, characterized in that: The stirring shaft (4) and the gas outlet head (2) are arranged opposite to each other, and a gap is left between the stirring shaft (4) and the gas outlet head (2).

4. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 1, characterized in that: The air supply pipe (21) extends into the tank body (1) and is connected to the air outlet head (2).

5. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 1, characterized in that: The air outlet head (2) is provided with a plurality of air outlet holes (22), one end of all the air outlet holes (22) is connected to the tank body (1), and the other end of all the air outlet holes (22) is connected to the air supply pipe (21).

6. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 5, characterized in that: A plurality of air outlet holes (22) are arranged in a ring-shaped manner at equal intervals on the air outlet head (2).

7. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 1, characterized in that: A cavity (23) is provided at one end of the air outlet head (2) facing the air supply pipe (21), and the cavity (23) is communicated with the air supply pipe (21).

8. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 7, characterized in that: The inner diameter of the cavity (23) is adapted to the outer diameter of the air supply pipe (21).

9. The pulsed intermittent steam bottom blowing coupled with mechanical stirring intensified mixing device according to claim 1, characterized in that: The steam generating unit (6) is provided with a mass flow meter (8) for monitoring the steam flow rate.

Images