Energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device

Abstract

This invention belongs to the field of polycarboxylate mother liquor processing technology and discloses an energy-saving high-concentration polycarboxylate mother liquor synthesis reaction device, including a reaction vessel. Five first ultrasonic transducers are integrated at the bottom of the reaction vessel, forming a regular pentagon that covers the entire bottom area of ​​the vessel. Twenty second ultrasonic transducers are integrated on the side wall of the reaction vessel, arranged in a four-layer ring array. This invention integrates five first ultrasonic transducers at the bottom of the reaction vessel and twenty second ultrasonic transducers on the side wall. The first and second ultrasonic transducers convert ultrasonic energy into heat energy to heat the reactants. By using ultrasonic cavitation heat instead of traditional steam heating, not only can energy savings of ≥200 kWh be achieved per batch, but the reaction concentration is also increased from 50% to 80%, reducing logistics costs.

Description

Technical Field

[0001] This utility model belongs to the field of polycarboxylate mother liquor processing technology, specifically relating to an energy-saving high-concentration polycarboxylate mother liquor synthesis reaction device. Background Technology

[0002] Polycarboxylate mother liquor is a core intermediate product for preparing polycarboxylate-based high-performance water-reducing agents. It is widely used in concrete engineering, and its performance directly affects key indicators such as the fluidity, slump retention, and strength of concrete. Polycarboxylate mother liquor is a high molecular weight polymer aqueous solution produced by free radical polymerization of raw materials such as unsaturated carboxylic acids (such as acrylic acid) and polyether macromonomers (such as methyl allyl polyoxyethylene ether).

[0003] In the traditional synthesis process of polycarboxylate mother liquor, the reaction concentration is usually controlled at 40%-50%. If the concentration is further increased, the following problems will occur: Insufficient mixing: the traditional stirring mass transfer efficiency is low at high viscosity, the initiator is unevenly dispersed, and the reaction conversion rate decreases (<85%); The product has an excessively wide PDI (molecular weight distribution coefficient >2.0): the local reaction rate varies greatly, and the product performance is unstable; High energy consumption: it is necessary to rely on steam heating to maintain the reaction temperature (60-80℃), and the transportation cost is high (low concentration products contain more water). Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving high-concentration polycarboxylate mother liquor synthesis reaction device, comprising a reaction vessel, wherein five first ultrasonic transducers are integrated at the bottom of the reaction vessel, the five first ultrasonic transducers are arranged in a regular pentagon covering the entire area of ​​the bottom of the reaction vessel, and 20 second ultrasonic transducers are integrated on the side wall of the reaction vessel, the 20 second ultrasonic transducers are arranged in a four-layer ring array on the side wall of the reaction vessel, and each layer consists of five second ultrasonic transducers.

[0006] Preferably, the spacing between the second ultrasonic transducers in each layer is greater than 15cm.

[0007] Preferably, the total power of the 20 second ultrasonic transducers is 25 kHz, the power of each second ultrasonic transducer is 1-3 kW, and the amplitude is 30-50 μm.

[0008] Preferably, the total power of the five first ultrasonic transducers is 20kHz, the power of each first ultrasonic transducer is 2-5kW, and the amplitude is 50-80μm.

[0009] Preferably, a temperature sensor is inclinedly installed at the lower end of the reactor, and the temperature measuring end of the temperature sensor extends into the interior of the reactor. The temperature sensor is a PT100 temperature sensor.

[0010] Preferably, an ultrasonic generator is provided on one side of the reactor, and the ultrasonic generator is electrically connected to the first ultrasonic transducer and the second ultrasonic transducer respectively.

[0011] Preferably, a PLC control cabinet is provided on the other side of the reactor, and the PLC control cabinet is electrically connected to the temperature sensor and the ultrasonic generator respectively.

[0012] Preferably, a stirring motor is provided on the top of the reactor, and a stirring paddle is provided inside the reactor, with the output end of the stirring motor connected to the stirring paddle.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model integrates five first ultrasonic transducers at the bottom of the reactor, and the five first ultrasonic transducers cover the entire area of ​​the bottom of the reactor. It also integrates 20 second ultrasonic transducers on the side wall of the reactor. The ultrasonic energy is converted into heat energy through the first and second ultrasonic transducers to heat the reaction material. The ultrasonic cavitation heat is used to replace the traditional steam heating. Not only can the energy saving of ≥200kWh per batch be increased, but the reaction concentration is also increased from 50% to 80%, reducing the transportation of moisture and reducing logistics costs.

[0015] (2) The present invention has a compact structure. The first ultrasonic transducer and the second ultrasonic transducer are both integrated, requiring no additional space. Ultrasonic heating improves reaction efficiency, reduces the width of the product PDI, improves reaction conversion rate, and also improves the stability of product performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the distribution structure of the first ultrasonic transducer at the bottom of the reactor of this utility model;

[0018] Figure 3 This is a cross-sectional view of the layered arrangement of the second ultrasonic transducer on the side wall of the reactor of this utility model.

[0019] In the diagram: 1. Stirring motor; 2. Reactor; 3. Temperature sensor; 4. First ultrasonic transducer; 5. Ultrasonic generator; 6. PLC control cabinet; 7. Second ultrasonic transducer; 8. Stirring paddle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-3 As shown, this utility model provides a technical solution: an energy-saving high-concentration polycarboxylate mother liquor synthesis reaction device, including a reaction vessel 2. The reaction vessel 2 is provided with an inlet and an outlet to facilitate the entry and exit of reactants. Five first ultrasonic transducers 4 are integrated at the bottom of the reaction vessel 2. The five first ultrasonic transducers 4 are arranged in a regular pentagonal shape, covering the entire bottom area of ​​the reaction vessel 2. The total power of the five first ultrasonic transducers 4 is 20kHz, the power of each first ultrasonic transducer 4 is 2-5kW, and the amplitude is 50-80μm. The side wall of the reactor 2 is integrated with 20 second ultrasonic transducers 7. The 20 second ultrasonic transducers 7 are distributed in a four-layer ring array on the side wall of the reactor 2, and each layer consists of 5 second ultrasonic transducers 7. The spacing between the second ultrasonic transducers 7 in each layer is greater than 15cm. The total power of the 20 second ultrasonic transducers 7 is 25kHz, the power of each second ultrasonic transducer 7 is 1-3kW, and the amplitude is 30-50μm. The first ultrasonic transducer 4 and the second ultrasonic transducer 7 are both made of titanium alloy.

[0022] like Figure 3 As shown, a stirring motor 1 is installed on the top of the reactor 2, and a stirring paddle 8 is installed inside the reactor 2. The output end of the stirring motor 1 is connected to the stirring paddle 8. The stirring motor 1 drives the stirring paddle 8 to rotate, thereby stirring the reactants and promoting the mixing reaction rate of the materials.

[0023] like Figure 1 As shown, an ultrasonic generator 5 is installed on one side of the reactor 2. The ultrasonic generator 5 is electrically connected to the first ultrasonic transducer 4 and the second ultrasonic transducer 7. The ultrasonic generator 5 converts electrical energy into high-frequency alternating current and supplies the current to the ultrasonic transducer. After receiving the current, the ultrasonic transducer converts the electrical energy into high-frequency mechanical vibration and transmits it to the reactants, causing cavitation in the reactants. The cavitation effect is used to generate heat to heat the reactants.

[0024] A temperature sensor 3 is installed at the lower end of the reactor 2 at an angle. The temperature measuring end of the temperature sensor 3 extends into the interior of the reactor 2. The temperature sensor 3 is a PT100 temperature sensor. The temperature sensor 3 monitors the temperature of the reactants in real time and converts it into an electrical signal, which is then transmitted to the PLC control cabinet 6. The PLC control cabinet 6 converts this signal into a recognizable digital signal. Then, the program inside the PLC control cabinet 6 reads the digital signal and converts it into the actual temperature value.

[0025] On the other side of the reactor 2, there is a PLC control cabinet 6, which is electrically connected to the temperature sensor 3 and the ultrasonic generator 5 respectively. Through the linkage control of the temperature sensor 3 and the PLC, the reaction temperature is maintained at 30-70℃ by the heat of ultrasonic cavitation, so that only a short heating is needed during the start-up stage.

[0026] The working principle and usage process of this utility model are as follows: During use, the stirring motor 1 drives the stirring paddle 8 to rotate and stir the reaction materials inside the reaction vessel 2, which helps to promote the mixing and reaction rate of the materials. In the initial stage of the reaction, the viscosity of the materials is low. The circuit connected between the ultrasonic generator 5 and the first ultrasonic transducer 4 is controlled by the PLC control cabinet 6. The ultrasonic generator 5 converts electrical energy into high-frequency alternating current and supplies this current to the first ultrasonic transducer 4. After receiving the current, the first ultrasonic transducer 4 converts the electrical energy into high-frequency mechanical vibration and transmits it to the reaction materials, causing cavitation in the reaction materials. The cavitation effect generates heat to heat the reaction materials. In the middle and later stages of the reaction, the materials are in a high viscosity stage. At this time, the circuit connected between the ultrasonic generator 5, the first ultrasonic transducer 4, and the second ultrasonic transducer 7 is fully connected by the PLC control cabinet 6. At this time, both the first ultrasonic transducer 4 and the second ultrasonic transducer 7 are working to heat the reaction materials, which significantly increases the reaction concentration of the reaction materials. At the same time, the use of ultrasonic cavitation heat to replace external heating results in significant energy savings, a narrow PDI of the product, and a high conversion rate, making it suitable for industrial production.

[0027] Furthermore, during the reaction process, the temperature of the reactants is monitored in real time by the temperature sensor 3 and converted into an electrical signal, which is then transmitted to the PLC control cabinet 6. The PLC control cabinet 6 converts this signal into a recognizable digital signal. The internal program of the PLC control cabinet 6 reads the digital signal, converts it into the actual temperature value, compares it with the target temperature, and adjusts the vibration amplitude of the first ultrasonic transducer 4 and the second ultrasonic transducer 7 by controlling the output power of the ultrasonic generator 5. This adjusts the amount of mechanical energy absorbed by the reactants, thereby regulating the temperature of the reactants and maintaining the reaction temperature.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving high-concentration polycarboxylate mother liquor synthesis reaction device, comprising a reaction vessel (2), characterized in that, The bottom of the reactor (2) is integrated with 5 first ultrasonic transducers (4), which are arranged in a regular pentagon to cover the entire area of ​​the bottom of the reactor (2). The side wall of the reactor (2) is integrated with 20 second ultrasonic transducers (7), which are arranged in 4 layers of a ring array on the side wall of the reactor (2), and each layer consists of 5 second ultrasonic transducers (7).

2. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 1, characterized in that: The spacing between the second ultrasonic transducers (7) in each layer is greater than 15cm.

3. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 2, characterized in that: The total power of the 20 second ultrasonic transducers (7) is 25 kHz, and the power of each second ultrasonic transducer (7) is 1-3 kW with an amplitude of 30-50 μm.

4. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 1, characterized in that: The total power of the five first ultrasonic transducers (4) is 20kHz, and the power of each first ultrasonic transducer (4) is 2-5kW with an amplitude of 50-80μm.

5. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 1, characterized in that: A temperature sensor (3) is inclinedly installed at the lower end of the reactor (2). The temperature measuring end of the temperature sensor (3) extends into the interior of the reactor (2). The temperature sensor (3) is a PT100 temperature sensor.

6. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 5, characterized in that: An ultrasonic generator (5) is provided on one side of the reactor (2), and the ultrasonic generator (5) is electrically connected to the first ultrasonic transducer (4) and the second ultrasonic transducer (7).

7. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 6, characterized in that: A PLC control cabinet (6) is provided on the other side of the reactor (2), and the PLC control cabinet (6) is electrically connected to the temperature sensor (3) and the ultrasonic generator (5).

8. The energy-saving high-concentration polycarboxylic acid mother liquor synthesis reaction device according to claim 1, characterized in that: The top of the reactor (2) is equipped with a stirring motor (1), and the interior of the reactor (2) is equipped with a stirring paddle (8). The output end of the stirring motor (1) is connected to the stirring paddle (8).

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