Sulfonating reaction device for naphthalene water reducer production
By using the main stirring paddle, secondary stirring paddle and baffle structure in the sulfonation reaction kettle and combining with the automatic acidity measurer, the problems of insufficient stirring and time-consuming judgment of the reaction end point are solved, and faster reactions and higher The yield of naphthalene-based water reducing agent ensures product quality.
Patent Information
- Application Number
- CN202421026194.8
- 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
The existing sulfonation reactors have insufficient stirring in the production of naphthalene-based water reducing agents, resulting in slow reaction speed, low production efficiency, and time-consuming and labor-intensive judgment of the reaction end point, affecting product yield and quality.
A sulfonation reaction device including a jacketed reactor, a temperature control device, an automatic acidity measurer, an agitating device and an inert gas supply system was designed. The main stirring paddle, a secondary stirring paddle and a baffle structure were used to form a vortex current, combined with automatic The acidity measurer detects the acidity in real time and determines the reaction end point in time.
It improves the mixing efficiency of materials, shortens the reaction time, improves the yield of naphthalene-based water reducing agent, and ensures product quality.
Smart Images
Figure CN222342871U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water reducing agent production equipment, in particular to a sulfonation reaction device for producing naphthalene-based water reducing agent. Background Art
[0002] Naphthalene-based water reducer is the most widely used and produced high-efficiency water reducer in my country (accounting for more than 70% of the water reducer usage). It is characterized by a high water reduction rate, no air entrainment, little effect on setting time, relatively good adaptability to cement, and can be used in combination with various other admixtures. It is also relatively cheap.
[0003] The production of naphthalene-based water reducer needs to go through melting, sulfonation reaction, hydrolysis reaction, condensation reaction and neutralization reaction to form a liquid naphthalene-based water reducer product. The sulfonation reaction process is a very important key process, which directly affects the yield and quality of the product. However, the existing sulfonation reactor has insufficient stirring, resulting in slow reaction speed and low production efficiency. At the same time, there are problems in judging the end point of the reaction. The prior art is to judge the end point of the sulfonation reaction by regular sampling and detection. This method is time-consuming and labor-intensive, often causing reaction timeout, which has a serious impact on the yield and quality of the product. Summary of the invention
[0004] The technical problem to be solved by the utility model is to provide a sulfonation reaction device for producing naphthalene series water reducing agent, which overcomes the defects of the prior art, has sufficient material mixing, can improve the reaction speed, save production time, and can timely judge the reaction end point to ensure the yield and quality of the product.
[0005] In order to solve the above technical problems, the technical solution of the utility model is:
[0006] A sulfonation reaction device for producing naphthalene-based water reducing agent comprises a reactor body provided with a jacket, a temperature control device is arranged in the jacket, a naphthalene feeding port, a pressure sensor and an automatic acidity tester are arranged on one side of the top of the reactor body, an air outlet and a liquid material feeding port are arranged on the other side, and an air inlet coil is arranged at the bottom of the inner cavity of the reactor body; a stirring device is arranged in the reactor body, the stirring device comprises two sets of upper and lower main stirring paddles and auxiliary stirring paddles, the main stirring paddle is an arched structure, and the auxiliary stirring paddle is an arc-shaped bracket fixed at the lower part of the main stirring paddle arched structure; a plurality of pairs of symmetrically arranged baffles are arranged between the stirring device and the side wall of the reactor body, the baffles comprise a main rod hanging from the top of the reactor body, and the main rod is provided with a plurality of baffle wings from top to bottom toward the side wall of the reactor body; a temperature sensor is arranged on the inner wall of the reactor body, and a discharge port is arranged at the bottom of the reactor body; the temperature control device, the automatic acidity tester, the stirring device, the pressure sensor and the temperature sensor are all electrically connected to an automatic control system.
[0007] Preferably, the lower part of the jacket is provided with a heat transfer oil inlet, and the top of the jacket is provided with a heat transfer oil outlet; the temperature control device is a temperature control coil, the oil inlet of which passes through the heat transfer oil inlet and is connected to the heat transfer oil supply device through the solenoid valve, and the oil outlet of which passes through the heat transfer oil outlet and is connected to the heat transfer oil recovery device. The solenoid valve is electrically connected to the automatic control system, and heat exchange is performed by the heat transfer oil running in the temperature control device.
[0008] Preferably, the automatic acidity meter is one of the PHS series automatic acidity meters produced by Qingdao Jinghong Environmental Protection Technology Co., Ltd.
[0009] Preferably, the two ends of the bow-shaped structure of the main stirring paddle are connected by a cross bar; the auxiliary stirring paddle has two arc-shaped brackets, which are symmetrically arranged at the lower part of the bow-shaped structure of the main stirring paddle.
[0010] Preferably, the surface of the air intake coil is provided with a plurality of vent holes, and the air intake coil is connected to an external inert gas supply device through a pipeline and a solenoid valve. The solenoid valve and the inert gas supply device are both electrically connected to an automatic control system; thus, the inert gas can be introduced into the reactor through valve control.
[0011] Preferably, a discharge pump is provided at the discharge port at the bottom of the kettle body, and the discharge pump is connected to the hydrolysis kettle through a pipeline to transport the mixed materials to the hydrolysis kettle for hydrolysis.
[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 adopts a main stirring paddle, an auxiliary stirring paddle and a baffle structure, which can form a vortex, so that the materials in the kettle are mixed more evenly and more quickly, and the mixing efficiency of the materials is improved;
[0015] 2. The utility model inputs inert gas from the bottom of the kettle body, so that the gas can drive the material in the kettle body to move when it rises, which is more conducive to mixing the materials;
[0016] 3. The utility model uses an automatic acidity meter to perform real-time detection of the acidity of the material, which can timely grasp the reaction situation and make timely judgments on the reaction endpoint, thus overcoming the previous defect of long time spent on manual detection, thereby improving the yield of the product and preventing the impact of excessive reaction on product quality.
[0017] In short, the device of the utility model mixes materials sufficiently, can improve the reaction speed, save production time, and can timely judge the reaction endpoint to ensure the yield and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0019] In the figure, 1, jacket; 2, kettle body; 3, pressure sensor; 4, automatic acidity tester; 5, air inlet coil; 6, main stirring paddle; 7, auxiliary stirring paddle; 8, baffle; 81, main rod; 82, baffle wing. DETAILED DESCRIPTION
[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] Embodiment 1
[0022] like Figure 1 As shown, a sulfonation reaction device for producing naphthalene-based water-reducing agent comprises a reactor body 2 provided with a jacket 1, a temperature control device (not shown) is arranged in the jacket 1, a naphthalene feeding port (not shown), a pressure sensor 3 and an automatic acidity tester 4 are arranged on one side of the top of the reactor body 2, an air outlet (not shown) and a liquid material feeding port (not shown) are arranged on the other side, and an air inlet coil 5 is arranged at the bottom of the inner cavity of the reactor body 2; a stirring device (not shown) is arranged in the reactor body 2, and the stirring device comprises two sets of upper and lower main stirring paddles 6 and auxiliary stirring paddles 7, the main stirring paddle 6 is an arched structure, and the auxiliary stirring paddle 7 is an arcuate structure. The paddle 7 is an arc-shaped bracket, fixed to the lower part of the arched structure of the main stirring paddle 6; a plurality of pairs of symmetrically arranged baffles 8 are provided between the stirring device and the side wall of the kettle body 2, and the baffles 8 include a main rod 81 hanging from the top of the kettle body 2, and the main rod 81 is provided with a plurality of baffle wings 82 from top to bottom toward the side wall of the kettle body 2; a temperature sensor (not marked) is provided on the inner wall of the kettle body 2, and a discharge port (not marked) is provided at the bottom of the kettle body 2; the temperature control device, the automatic acidity tester 4, the stirring device, the pressure sensor 3 and the temperature sensor are all electrically connected to the automatic control system (not marked).
[0023] During actual production, solid industrial naphthalene is first put into a naphthalene melting kettle, and the naphthalene melting kettle is heated until the industrial naphthalene melts; then the melted naphthalene is transported to the sulfonation reaction kettle from the naphthalene feed port; the temperature control device in the jacket is turned on to heat the kettle body 2, the stirring device is turned on to stir and the inert gas supply device is turned on to supply inert gas (to ensure the effect of the sulfonation reaction), and at the same time, the concentrated sulfuric acid with a concentration of 98% and a temperature of 120-130° C. is added dropwise according to the weight ratio of industrial naphthalene to concentrated sulfuric acid of 1:1; the dropping time is 0.5-1h, and then the temperature is kept at 160-165° C. for reaction, and the sulfonation reaction is kept at 2.0-2.5h for reaction, and when the automatic acidity meter 4 detects that the material acidity is 30% (optimal reaction conditions), the sulfonation reaction ends. Through the above reaction, the reaction time is reduced by about 30% compared with the existing sulfonation reaction time, and the yield of the naphthalene-based water reducer is increased by about 12%, and the beneficial effect is remarkable.
[0024] 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 sulfonation reaction device for producing naphthalene-based water reducer, characterized in that: The invention comprises a reactor body provided with a jacket, wherein a temperature control device is arranged in the jacket, a naphthalene feeding port, a pressure sensor and an automatic acidity tester are arranged on one side of the top of the reactor body, an air outlet and a liquid material feeding port are arranged on the other side, and an air inlet coil is arranged at the bottom of the reactor body cavity; a stirring device is arranged in the reactor body, and the stirring device comprises two sets of upper and lower main stirring paddles and auxiliary stirring paddles, wherein the main stirring paddle is an arched structure, and the auxiliary stirring paddle is an arc-shaped bracket fixed at the lower part of the arched structure of the main stirring paddle; a plurality of pairs of symmetrically arranged baffles are arranged between the stirring device and the side wall of the reactor body, wherein the baffles comprise a main rod hanging from the top of the reactor body, and the main rod is provided with a plurality of baffle wings from top to bottom toward the side wall of the reactor body; a temperature sensor is arranged on the inner wall of the reactor body, and a discharge port is arranged at the bottom of the reactor body; the temperature control device, the automatic acidity tester, the stirring device, the pressure sensor and the temperature sensor are all electrically connected to an automatic control system.
2. The sulfonation reaction device for producing naphthalene-based water reducer according to claim 1, characterized in that: A heat transfer oil inlet is arranged at the lower part of the jacket, and a heat transfer oil outlet is arranged at the top of the jacket; the temperature control device is a temperature control coil, whose oil inlet passes through the heat transfer oil inlet and is connected to the heat transfer oil supply device through a solenoid valve, and whose oil outlet passes through the heat transfer oil outlet and is connected to the heat transfer oil recovery device.
3. The sulfonation reaction device for producing naphthalene-based water reducer according to claim 1, characterized in that: The two ends of the bow-shaped structure of the main stirring paddle are connected by a crossbar; the auxiliary stirring paddle has two arc-shaped brackets, which are symmetrically arranged at the lower part of the bow-shaped structure of the main stirring paddle.
4. The sulfonation reaction device for producing naphthalene-based water reducer according to claim 1, characterized in that: The surface of the air intake coil is provided with a plurality of vent holes, and the air intake coil is connected with an external inert gas supply device through a pipeline and a solenoid valve.
5. The sulfonation reaction device for producing naphthalene-based water reducer according to claim 1, characterized in that: A discharge pump is provided at the discharge port at the bottom of the kettle body, and the discharge pump is connected to the hydrolysis kettle through a pipeline.
6. The sulfonation reaction device for producing naphthalene-based water reducer according to claim 1, characterized in that: The automatic control system is a DCS automatic control system.