Condensation device for naphthalene water reducer production
By using an automatic control system to detect the current of the stirring motor and the viscosity of the reaction liquid in the production of naphthalene-based water reducing agents, the problems of inaccurate judgment of the end point of the condensation reaction and volatile formaldehyde pollution are solved, and the accurate control and safety of the reaction are achieved.
Patent Information
- Application Number
- CN202421026187.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-13
AI Technical Summary
In the production of naphthalene-based water reducing agents, the end point judgment of the condensation reaction relies on manual visual inspection or sampling detection, resulting in inaccurate end points and volatilization of formaldehyde and contamination, which makes it difficult to effectively control the existing processes.
A condensation device for naphthalene-based water reducing agent production with an automatic control system including an online thermometer, an online viscometer and a current sensor is designed. By detecting the changes in the current and viscosity of the stirring motor, the end point of the condensation reaction is automatically controlled.
The accurate end point judgment of the condensation reaction is achieved, manual operation errors and safety risks are reduced, the reaction is completed in the best state, and the production efficiency and safety are improved.
Smart Images
Figure CN222342870U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water reducing agent production equipment, in particular to a condensation device for producing naphthalene-based water reducing agent. Background Art
[0002] Naphthalene water-reducing agent is the most widely used high-efficiency water-reducing agent (accounting for more than 70% of water-reducing agent consumption) with the largest current production volume in my country. It is characterized in that the water reduction rate is higher, does not entrain air, has little effect on the setting time, is relatively good with cement adaptability, can be used in combination with other various admixtures, and is relatively cheap. At present, in the production of naphthalene water-reducing agent, generally all need to pass through sulfonation, hydrolysis, condensation and neutralization reaction, condensation reaction wherein is a relatively important step, reaction temperature is high, time is long, formaldehyde is more difficult to control in the used raw materials, volatilization can be produced in the reaction, if volatilization can produce harm to the environment and the human body, so existing production technology is selected to produce under a closed environment as far as possible, but the judgment of its reaction end point needs artificial visual estimation or sampling to judge by detecting viscosity and appearance appearance, this process can cause the end point to judge inaccurately, also can make formaldehyde volatilize, cause pollution, therefore need to solve this problem in the actual production process. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a condensation device for the production of naphthalene-based water-reducing agent, which overcomes the defects of the prior art and automatically controls the end point of the condensation reaction by detecting the change of the current of the stirring motor and the viscosity of the reaction liquid. The device has a simple structure, is easy to operate, reduces manual operation errors and safety risks, and has broad application prospects.
[0004] In order to solve the above technical problems, the technical solution of the utility model is:
[0005] A condensation device for producing a naphthalene-based water-reducing agent comprises a kettle body provided with a jacket, a heat exchange system is provided in the jacket, a feeding system, a discharging system and a stirring system are provided on the kettle body, and an online thermometer and an online viscometer are also provided on the top of the kettle body; a current sensor is provided on a stirring motor of the stirring system; the heat exchange system, the feeding system, the discharging system, the stirring system, the online thermometer, the online viscometer and the current sensor are all electrically connected to an automatic control system.
[0006] Preferably, the heat exchange system is a heat exchange coil, and both ends of the heat exchange coil are connected to the heat exchange medium supply device and the heat exchange medium recovery device respectively through solenoid valves. The solenoid valve is electrically connected to the automatic control system, which can better control the material temperature in the kettle.
[0007] Preferably, the feeding system includes a feeding pipe for conveying materials from the hydrolysis kettle, a formaldehyde dripping pipe for adding formaldehyde, and a steam input pipe for heating the reaction liquid; the above pipelines are all provided with solenoid valves and flow meters, and the solenoid valves and flow meters are electrically connected to the automatic control system.
[0008] Preferably, the discharge system is arranged at the bottom of the kettle body, and a discharge pump is arranged at the discharge port thereof, and the discharge pump is connected to the neutralization kettle through a pipeline to transport the mixed materials to the neutralization kettle for reaction.
[0009] Preferably, the stirring system comprises a stirring motor and a reducer arranged on the upper part of the kettle body, and a stirring shaft passing through the top of the kettle body and entering into the kettle body, wherein a stirring paddle is arranged on the stirring shaft.
[0010] Preferably, the probe of the online thermometer passes through the top of the kettle body and extends into the interior of the kettle body; the probe of the online viscometer passes through the top of the kettle body and extends into the reaction liquid; and the current sensor is arranged in the power distribution room.
[0011] Preferably, the online thermometer is a wzpk-240b model pt100 temperature sensor produced by Anhui Henry Instrument, the online viscometer is an APX401 model online viscometer produced by Shandong Aipxin Automation Instrument Co., Ltd., and the current sensor is a JD194-BS4I2 model current transmitter produced by Jiangsu Sfeir Electric Co., Ltd.
[0012] Preferably, the automatic control system is a DCS automatic control system.
[0013] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0014] 1. The utility model controls the reaction temperature through an online thermometer, so that the reaction temperature is carried out within the optimal range to ensure the efficiency of the condensation reaction;
[0015] 2. The automatic control system of the utility model automatically detects the change of the current on the stirring motor and the change of the viscosity of the reaction liquid, and automatically determines the endpoint of the reaction to ensure that the reaction is completed under the best conditions and the quality of the condensation reaction; at the same time, because it replaces the manual judgment of the reaction endpoint, it reduces manual operation errors and safety risks.
[0016] In short, the utility model has a simple structure, is easy to operate, reduces manual operation errors and safety risks, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0018] In the figure, 1, jacket; 2, kettle body; 3, online thermometer; 4, online viscometer; 5, stirring motor; 6, current sensor. DETAILED DESCRIPTION
[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0020] Embodiment 1
[0021] like Figure 1 As shown, a condensation device for producing a naphthalene-based water-reducing agent comprises a kettle 2 provided with a jacket 1, a heat exchange system (not shown) being provided in the jacket 1, a feeding system (not shown), a discharging system (not shown) and a stirring system (not shown) being provided on the kettle 2, an online thermometer 3 and an online viscometer 4 being provided on the top of the kettle 2; a current sensor 6 being provided on a stirring motor 5 of the stirring system; the heat exchange system, the feeding system, the discharging system, the stirring system, the online thermometer 3, the online viscometer 4 and the current sensor 6 are all electrically connected to an automatic control system (not shown).
[0022] In actual production, the material obtained from the previous hydrolysis reaction is added to the kettle body 2, the stirring motor 5 in the stirring system and the heat exchange system in the jacket 1 are started, and then formaldehyde is added dropwise through the formaldehyde dropping tube, and steam for heating the reaction liquid is input through the steam input tube to start the condensation reaction; at the same time, the online viscometer 4 and the current sensor 6 will monitor the viscosity of the reaction liquid and the current value of the stirring motor in real time, and transmit the data to the control system; during the reaction process, the automatic control system will automatically adjust the process parameters according to the reaction situation. When the reaction is completed, the automatic control system issues a command to control the reaction to stop, and the reaction liquid is transported to the subsequent process through the discharging system for subsequent processing, such as separation, purification, etc., to obtain the final naphthalene-based water reducer product.
[0023] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.
Claims
1. A condensation device for producing a naphthalene-based water-reducing agent, comprising a kettle body provided with a jacket, a heat exchange system provided in the jacket, a feeding system, a discharging system and a stirring system provided on the kettle body, characterized in that: An online thermometer and an online viscometer are also provided on the top of the kettle body; a current sensor is provided on the stirring motor of the stirring system; the heat exchange system, feeding system, discharging system, stirring system, online thermometer, online viscometer and current sensor are all electrically connected to the automatic control system.
2. The condensation device for producing naphthalene-based water-reducing agent according to claim 1, characterized in that: The heat exchange system is a heat exchange coil, and both ends of the heat exchange coil are connected to a heat exchange medium supply device and a heat exchange medium recovery device respectively through a solenoid valve, and the solenoid valve is electrically connected to an automatic control system.
3. The condensation device for producing naphthalene-based water-reducing agent according to claim 1, characterized in that: The feeding system comprises a feeding pipe for conveying materials from the hydrolysis kettle, a formaldehyde dripping pipe, and a steam input pipe.
4. The condensation device for producing naphthalene-based water-reducing agent according to claim 1, characterized in that: The discharging system is arranged at the bottom of the kettle body, and a discharging pump is arranged at the discharging port thereof.
5. The condensation device for producing naphthalene-based water-reducing agent according to claim 1, characterized in that: The stirring system comprises a stirring motor and a reducer arranged on the upper part of the kettle body, and a stirring shaft passing through the top of the kettle body and entering into the kettle body, wherein a stirring paddle is arranged on the stirring shaft.
6. The condensation device for producing naphthalene-based water-reducing agent according to claim 1, characterized in that: The automatic control system is a DCS automatic control system.