Naphthalene gypsum water reducer production device

Abstract

The utility model relates to the technical field of water reducing agent production equipment, and discloses a naphthalene gypsum water reducing agent production device which comprises a reaction kettle, a neutralization kettle, a screening machine and a finished product storage tank which are sequentially communicated through pipelines, valves and pumps, a discharge port of the reaction kettle is communicated to a feed port of the neutralization kettle, a discharge port of the neutralization kettle is communicated to a feed port of the screening machine, a discharge port of the screening machine is provided with a particle outlet and a finished product outlet, and the finished product outlet is communicated to a feed port of the finished product storage tank; a circulating pipe communicated with the upper part and the lower part of the kettle body is arranged outside the kettle body of the neutralization kettle; and a circulating pump is arranged at the lower part of the circulating pipe. The device disclosed by the utility model is simple in structure, and the quality of the naphthalene gypsum water reducer is improved, so that the strength of gypsum is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water reducing agent production equipment, in particular to a naphthalene-based gypsum water reducing agent production device. Background Art

[0002] Gypsum has the advantages of heat preservation, heat insulation, sound absorption, and fire prevention, and is increasingly favored by the construction industry. With the promotion of the national energy conservation and emission reduction policy, the application of gypsum products is becoming more and more extensive. However, the strength of building gypsum is generally low. By adding a water reducer, the amount of water used for gypsum mixing can be reduced while maintaining the same fluidity, which is an effective way to improve the strength of gypsum. In the field of gypsum, the most commonly used water reducers are naphthalene, aminosulfonic acid, sulfonated melamine, polycarboxylic acid, and lignin sulfonate. Among them, naphthalene-based water reducers are currently the most widely used high-efficiency water reducers in China, and the main products are FDN, NF, UNF, etc. Its molecular structure contains benzene rings and sulfonic acid groups, has a strong dispersing effect, a high water reduction rate, and is economical and colorless. However, the effect of naphthalene-based water reducers when used directly on gypsum is very poor. In addition to the differences in product properties of naphthalene-based water reducers due to different raw materials, the particles in the naphthalene-based water reducer products also have a great impact on the use effect. If the number of particles with a particle size greater than 5 mm is large, it will seriously affect the use effect of the product and increase the strength of the gypsum to a limited extent. Therefore, this problem needs to be overcome during the preparation process in order to improve the product quality of naphthalene-based water reducers, thereby effectively improving the strength of gypsum. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a naphthalene gypsum water reducing agent production device, which overcomes the defects of the prior art, has a simple device structure, improves the quality of the naphthalene gypsum water reducing agent, reduces the addition amount of the naphthalene gypsum water reducing agent in the production of gypsum boards, and thus improves the strength of the gypsum.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A naphthalene-based gypsum water-reducing agent production device comprises a reactor, a neutralization reactor, a screening machine and a finished product storage tank which are sequentially connected through pipelines, valves and pumps; the discharge port of the reactor is connected to the feed port of the neutralization reactor, the discharge port of the neutralization reactor is connected to the feed port of the screening machine, the discharge port of the screening machine is provided with a particle outlet and a finished product outlet, and the finished product outlet is connected to the feed port of the finished product storage tank; a circulating pipe which connects the upper part and the lower part of the reactor body is provided outside the neutralization reactor, and a circulating pump is provided at the lower part of the circulating pipe.

[0006] Preferably, the reactor is connected to the sulfuric acid tank, the naphthalene tank, the formaldehyde tank and the water tank respectively through pipelines, valves and pumps.

[0007] Preferably, the reactor is provided with a temperature control jacket and a stirring device.

[0008] Preferably, the neutralization kettle is connected to the caustic soda tank and the retarder tank respectively through pipelines, valves and pumps.

[0009] Furthermore, the bottoms of the sulfuric acid tank, naphthalene tank, formaldehyde tank, caustic soda tank, water tank and retarder tank are all provided with metering sensors, and the metering sensors and circulating pumps are electrically connected to an automatic control system; the automatic control system is a DCS automatic control system.

[0010] Preferably, the screening machine is a vibrating screening machine, and the aperture of the screen mesh is 5 mm, so that particles larger than 5 mm are screened out to ensure the quality of the water reducing agent.

[0011] Preferably, the particle outlet of the screening machine is connected to a particle storage tank through a pipeline, and the particles are collected and then incinerated.

[0012] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model provides a circulating pipe and a circulating pump outside the kettle body of the neutralizing kettle, which can prevent the occurrence of insufficient reaction and pipeline congestion caused by the aggregation and sedimentation of particles in the reaction liquid; a screening machine is arranged to screen out large particles, which can ensure the quality of the product; in addition, a retarder tank is added, and the coagulation reaction speed of the gypsum can be delayed by adding the retarder, so that the gypsum has a longer operating time, improves the fluidity and processability of the gypsum, and makes the gypsum easier to construct and shape.

[0014] In conclusion, the utility model has a simple structure, improves the quality of naphthalene-based gypsum water reducing agent, reduces the amount of additives in gypsum board production, reduces water consumption, and thus improves the strength of gypsum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0016] In the figure, 1. Reactor; 2. Neutralization kettle; 3. Screening machine; 4. Finished product storage tank; 5. Sulfuric acid tank; 6. Naphthalene tank; 7. Formaldehyde tank; 8. Water tank; 9. Caustic soda tank; 10. Retarder tank; 11. Circulation pipe; 12. Circulation pump; 13. Particle storage tank. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Embodiment 1

[0019] like Figure 1As shown, a naphthalene-based gypsum water-reducing agent production device comprises a reactor 1, a neutralization reactor 2, a screening machine 3 and a finished product storage tank 4 which are connected in sequence through a pipeline (not marked), a valve (not marked) and a pump (not marked); the reactor 1 is connected to a sulfuric acid tank 5, a naphthalene tank 6, a formaldehyde tank 7 and a water tank 8 respectively through a pipeline, a valve and a pump; the discharge port of the reactor 1 is connected to a feed port of the neutralization reactor 2, and the neutralization reactor 2 is connected to a caustic soda tank 9 and a retarder tank 10 respectively through a pipeline, a valve and a pump; the discharge port of the neutralization reactor 2 is connected to the feed port of the screening machine 3, and the discharge port of the screening machine 3 is provided with a particle outlet (not marked) and a finished product outlet (not marked), and the finished product outlet is connected to the feed port of the finished product storage tank 4; a circulation pipe 11 connecting the upper and lower parts of the reactor body is provided outside the neutralization reactor 2, and a circulation pump 12 is provided at the lower part of the circulation pipe.

[0020] The particle outlet of the screening machine 3 is connected to the particle storage tank 13 through a pipeline.

[0021] In actual production, 1200 parts of naphthalene solution are added to the reactor 1, heated to 130°C, 1200 parts of 98% concentrated sulfuric acid are slowly added, and the addition is completed within 0.75h, then the temperature in the reactor is raised to 160°C, and insulation is started; after insulation for 2 hours, the temperature is lowered to 110°C, and then 550 parts of water are added to the reactor 1 for hydrolysis, and the water is added within 20min, and the hydrolysis is carried out for 30min; then the temperature is lowered to 90°C, 700 parts of formaldehyde solution with a concentration of 38% are slowly added, and the addition is completed within 2 hours. After the formaldehyde solution is added, the motor current of the stirring motor is used as a judgment point. When the motor current increases by 1A, 200 parts of water are added to dilute until the motor current is reduced to the original current. Flow, then continue to react, when the motor current increases by 4A, add 400 parts of water to dilute until the motor current decreases to the original current, then continue to react, when the motor current increases by 10A, add water to dilute until the motor current decreases to the original current while heating; then the feed liquid is transported to the neutralization kettle 2, 33% concentration of caustic soda solution is added for neutralization, and 300 parts of retarder (sodium gluconate) are added to adjust the pH value to 9. During the neutralization process, the circulating pump 12 is turned on to keep the feed liquid circulating. After the neutralization is completed, the feed liquid is transported to a screening machine for screening, and particles larger than 5mm in the feed liquid are screened out to obtain a naphthalene-based gypsum water-reducing agent mother liquid; if it is necessary to prepare it into a solid, the mother liquid is dried and formed by a dryer.

[0022] 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 naphthalene-based gypsum water-reducing agent production device, characterized in that: It comprises a reactor, a neutralization reactor, a screening machine and a finished product storage tank which are connected in sequence through pipelines, valves and pumps; the discharge port of the reactor is connected to the feed port of the neutralization reactor, the discharge port of the neutralization reactor is connected to the feed port of the screening machine, the discharge port of the screening machine is provided with a particle outlet and a finished product outlet, and the finished product outlet is connected to the feed port of the finished product storage tank; the body of the neutralization reactor is provided with a circulation pipe connecting the upper and lower parts of the body, and the lower part of the circulation pipe is provided with a circulation pump.

2. The naphthalene-based gypsum water-reducing agent production device according to claim 1, characterized in that: The reactor is connected to a sulfuric acid tank, a naphthalene tank, a formaldehyde tank and a water tank respectively through pipelines, valves and pumps.

3. The naphthalene-based gypsum water-reducing agent production device according to claim 1, characterized in that: The reactor is provided with a temperature control jacket and a stirring device.

4. The naphthalene-based gypsum water-reducing agent production device according to claim 1, characterized in that: The neutralization kettle is connected to the caustic soda tank and the retarder tank respectively through pipelines, valves and pumps.

5. The naphthalene-based gypsum water-reducing agent production device according to claim 2, characterized in that: The tank bottoms of the sulfuric acid tank, the naphthalene tank, the formaldehyde tank and the water tank are all provided with metering sensors.

6. The naphthalene-based gypsum water-reducing agent production device according to claim 4, characterized in that: The tank bottoms of the caustic soda tank and the retarder tank are both provided with metering sensors.

7. The naphthalene-based gypsum water-reducing agent production device according to claim 1, characterized in that: The screening machine is a vibrating screening machine, and the aperture of the screen mesh is 5 mm.

8. The naphthalene-based gypsum water-reducing agent production device according to claim 1, characterized in that: The particle outlet of the screening machine is connected to the particle storage tank through a pipeline.

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