Corrosion-resistant polycarboxylate water-reducing agent compound tank

Abstract

The application discloses a corrosion-resistant polycarboxylate water-reducing agent compound tank, which comprises a tank body and a circulating device. The tank body adopts a three-layer composite structure, i.e. a carbon steel outer shell layer, an epoxy resin adhesive layer and a PP plastic inner lining layer, and has mechanical strength and strong acid corrosion resistance; a concave groove body and a convex tank top are arranged on the tank top, a stirring shaft driven by a motor and a circulating spraying assembly with a 45-degree inclination angle nozzle are integrated, and the circulating device at the tank bottom is switched between the discharge mode and the circulating mode through a three-way valve, and the pump is used to spray the material out of the ring pipe nozzle to form a vortex. The problems of excessive metal ions caused by corrosion of the traditional metal tank body, high cost of stainless steel, uneven stirring and stagnation of the tank wall are solved, and the product quality and the production efficiency are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, and in particular to a corrosion-resistant polycarboxylate superplasticizer compounding tank. Background Technology

[0002] The compounding of polycarboxylate superplasticizers requires a strongly acidic environment. Traditional metal tanks are prone to corrosion, leading to excessive metal ion levels in the product, while stainless steel tanks are expensive. Existing compounding tanks suffer from uneven mixing and the formation of a stagnant layer on the tank walls, affecting product quality. Therefore, a corrosion-resistant polycarboxylate superplasticizer compounding tank is provided to solve these problems. Utility Model Content

[0003] This application provides a corrosion-resistant polycarboxylate superplasticizer compounding tank, which solves the problems mentioned in the background art.

[0004] This application provides a corrosion-resistant polycarboxylate superplasticizer compounding tank, including a tank body and a circulation device.

[0005] Tank structure: The tank consists of a carbon steel outer shell, an epoxy resin adhesive layer, and a PP plastic inner lining layer, from the outside to the inside.

[0006] Tank top assembly: The top of the tank is provided with a concave groove, and a convex tank top is welded to the bottom of the concave groove. The top of the convex tank top is provided with a feed pipe and a power mechanism. The top of the feed pipe is provided with a detachable cover. The power mechanism includes a motor and a gearbox at its output end. The output end of the power mechanism is connected to a stirring shaft. Stirring blades are symmetrically welded to the side wall of the stirring shaft.

[0007] Circulating spray assembly: A ring tube is embedded in the side wall of the concave groove, and several nozzles with an inclination angle of 45° are provided at the bottom of the ring tube;

[0008] Circulation device: Located at the bottom of the tank, the discharge pipe is equipped with a circulation valve, a pump and a three-way valve in sequence from front to back. The first port of the three-way valve is connected to the discharge pipe, the second port is connected to the circulation pipe with a fixed seat, and the end of the circulation pipe is connected to the ring pipe.

[0009] Furthermore, the tank body is embedded with a transparent observation window with corrosion resistance, which consists of a tempered glass layer and a fluoroplastic sealing ring.

[0010] Furthermore, the bottom of the tank is equipped with multiple support legs.

[0011] Furthermore, the motor is a servo motor.

[0012] Furthermore, the gearbox is a D-type gearbox.

[0013] Furthermore, a mechanical seal is used at the contact point between the stirring shaft and the convex tank top. The mechanical seal includes a silicon carbide moving ring and a polytetrafluoroethylene stationary ring.

[0014] As can be seen from the above technical solutions, this application provides a corrosion-resistant polycarboxylate superplasticizer compounding tank:

[0015] Composite tank:

[0016] Carbon steel outer shell: 8mm thick, yield strength ≥235MPa;

[0017] Epoxy resin adhesive layer: 2mm thickness, shear strength ≥10MPa (GB / T 7124);

[0018] PP plastic inner lining: 12mm thick, acid resistance rating PH1 (ISO 175);

[0019] The top of the tank is equipped with a feed pipe and a detachable cover for its output end.

[0020] Stirring device:

[0021] The power mechanism consists of an electric motor and a gearbox, located on the top of the convex tank, to provide kinetic energy to the stirring mechanism. The stirring mechanism consists of a stirring shaft and stirring blades symmetrically welded on it, connected to the output end of the power mechanism, and stirs the materials inside the tank under the drive of the power mechanism.

[0022] Dynamic sealing structure:

[0023] The combination of the concave tank body and the convex tank top creates a hollow structure on the tank top, ensuring that the power unit is kept away from highly corrosive acid liquids;

[0024] The hole through which the stirring shaft passes through the top of the convex tank is sealed with a silicon carbide moving ring and a polytetrafluoroethylene stationary ring, which effectively prevents acid mist from corroding and damaging the power mechanism.

[0025] Circulating injection system:

[0026] The bottom of the tank is connected to a discharge pipe, and a circulation valve, a pump and a three-way valve are installed on the discharge pipe in sequence. The first port of the three-way valve is connected to the discharge pipe, and the second port is connected to the circulation pipe with a fixed seat.

[0027] The output end of the circulation pipe is connected to a PP plastic ring pipe embedded in the side wall of the concave groove.

[0028] Several nozzles are inclined at 45° at the bottom of the ring pipe, with a jet velocity of 3m / s (generating tangential shear force);

[0029] During the compounding process of polycarboxylate superplasticizer, the three-way valve channel is switched to the second port, and the pump drives the material to form a closed loop. After the polycarboxylate superplasticizer is compounded, the three-way valve channel is switched to the first port, and the pump drives the polycarboxylate superplasticizer to be discharged from the discharge pipe.

[0030] In summary, the beneficial effects of this application are as follows:

[0031] 1. The tank is made of PP plastic inner lining, epoxy resin adhesive layer and carbon steel outer shell layer from the inside to the outside. Compared with traditional metal tanks, it is more resistant to strong acid environment with pH≤2, which reduces the migration of metal ions by 90%. Compared with traditional stainless steel tanks, the cost is reduced by 60%.

[0032] 2. By adopting a combination of symmetrical stirring blades, a circulation device, and a circulating spray assembly, not only is efficient and uniform mixing achieved, but also, under the action of the inclined nozzle, directional flushing of the inner wall of the tank is achieved, effectively reducing the residual rate of material on the inner wall of the tank, thereby improving product quality and production efficiency. Attached Figure Description

[0033] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of this application.

[0035] Figure 2 This is a schematic diagram of the cross-sectional structure of the tank in this application.

[0036] Illustration:

[0037] Among them, 1-tank body, 11-carbon steel outer shell layer, 12-epoxy resin adhesive layer, 13-PP plastic inner lining layer, 14-ring pipe, 15-nozzle, 16-observation window, 17-support leg, 2-concave trough, 3-convex tank top, 4-feed pipe, 5-cover, 6-motor, 7-gearbox, 8-stirring shaft, 9-stirring blade, 10-discharge pipe, 101-circulation valve, 102-pump, 103-three-way valve, 104-discharge pipe, 105-fixed seat, 106-circulation pipe. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0039] From the above technical solutions, it can be seen that:

[0040] Example 1:

[0041] See Figure 1 , Figure 2 .

[0042] A corrosion-resistant polycarboxylate superplasticizer compounding tank includes a tank body and a circulation device.

[0043] Tank fabrication:

[0044] Carbon steel outer shell layer 11: made of 8mm thick Q235B steel plate rolled and welded, with a yield strength ≥235MPa;

[0045] Epoxy resin adhesive layer 12: formed by spraying 2mm thick E-51 epoxy resin onto the inner wall of carbon steel outer shell layer 11, with a shear strength ≥10MPa (GB / T 7124).

[0046] PP plastic inner lining layer 13: formed by hot pressing and bonding a 12mm thick PPH-1000 sheet to the inner wall of the epoxy resin adhesive layer 12, with an acid resistance rating of PH1 (ISO 175).

[0047] The top of the tank body 1 is equipped with a feed pipe 4 and a detachable cover 5 for its output end.

[0048] Stirring device:

[0049] The power mechanism consists of a motor 6 and a gearbox 7, which is located on the top of the convex tank top 3. It provides kinetic energy to the stirring mechanism and drives the stirring mechanism to rotate. The stirring mechanism consists of a stirring shaft 8 and stirring blades 9 symmetrically welded on it. It is connected to the output end of the power mechanism and stirs the material inside the tank 1 under the drive of the power mechanism. Combined with the circulating spray system, the material in the tank 1 is efficiently mixed.

[0050] Dynamic sealing structure:

[0051] The concave tank 2 and the convex tank top 3 combine to form a hollow structure on the tank top, ensuring that the power mechanism is kept away from corrosive strong acid liquids;

[0052] The hole through which the stirring shaft 8 passes through the top of the convex tank top 3 is sealed with a mechanical seal to effectively prevent acid mist from corroding and damaging the power mechanism.

[0053] Circulating injection system:

[0054] The bottom of tank 1 is connected to a discharge pipe 10. A circulation valve 101 (controlling the opening and closing of the internal channels of the discharge pipe 10) and a pump 102 (a kinetic energy output structure that outputs kinetic energy during the material circulation and mixing process) are sequentially installed on the discharge pipe 10. The pump 102 then outputs kinetic energy through the second port of a three-way valve 103 and the circulation pipe 106 to the ring pipe 14. The material pumped by the pump 102 is then sprayed out through a nozzle 15, flushed along the tank wall, and returned to the inside of tank 1, thus forming a material circulation and mixing process. Combined with a stirring device, this effectively improves the compounding efficiency of polycarboxylate superplasticizer. The efficiency is improved, and the residual rate of material on the inner wall of tank 1 is reduced, thereby achieving the purpose of improving product quality and production efficiency. After the polycarboxylate superplasticizer is compounded, the output kinetic energy is used to extract the compounded polycarboxylate superplasticizer inside tank 1 and discharge it into the equipment through the first port of the three-way valve 103 and the discharge pipe 104 to collect and store the compounded polycarboxylate superplasticizer. The three-way valve 103 controls the direction of the material delivered by the pump 102. The first port of the three-way valve 103 is connected to the discharge pipe 104, and the second port is connected to the circulation pipe 106 with a fixed seat.

[0055] The output end of the circulation pipe (106) is connected to the PP plastic ring pipe (14) embedded in the side wall of the concave groove (2);

[0056] Several nozzles (15) are inclined at 45° at the bottom of the ring pipe (14) with a jet velocity of 3m / s (forming tangential shear force);

[0057] During the compounding process of polycarboxylate superplasticizer, the three-way valve (103) is switched to the second port, and the pump (102) drives the material to form a closed loop. Combined with the stirring device, this improves the compounding efficiency of polycarboxylate superplasticizer and reduces the residual rate of material on the inner wall of tank 1. After the polycarboxylate superplasticizer is compounded, the three-way valve (103) is switched to the first port, and the pump (102) drives the polycarboxylate superplasticizer to be discharged from the discharge pipe (104) so ​​as to collect and store the compounded polycarboxylate superplasticizer.

[0058] As a preferred embodiment, the tank body 1 is embedded with a transparent observation window 16 with corrosion resistance. The observation window 16 is composed of a tempered glass layer and a fluoroplastic sealing ring, which facilitates the staff to monitor the compounding process of polycarboxylate superplasticizer.

[0059] In a preferred embodiment, the bottom of the tank 1 is provided with a plurality of support legs 17 to support the tank 1.

[0060] As a preferred embodiment, motor 6 is a servo motor, which realizes closed-loop control of speed and torque, overcomes the problem of stepper motor step loss, has strong overload resistance, and can withstand a load three times the rated torque. It meets the characteristics of instantaneous load fluctuation and rapid start-up requirements of the stirring mechanism, ensuring the normal operation of the equipment.

[0061] As a preferred embodiment, the gearbox 7 is a D-type gearbox, which takes advantage of the gearbox's high torque resistance and increases the gearbox's output torque by increasing the reduction ratio, thereby reducing the requirement for input torque and reducing the output power of the motor 6, thus achieving the purpose of energy saving.

[0062] In a preferred embodiment, the contact point between the stirring shaft 8 and the convex tank top 3 is treated with a mechanical seal device, which includes a silicon carbide moving ring and a polytetrafluoroethylene stationary ring.

[0063] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0064] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A corrosion-resistant polycarboxylate superplasticizer compounding tank, comprising a tank body (1) and a circulation device, characterized in that: Tank structure: The tank (1) consists of a carbon steel outer shell layer (11), an epoxy resin adhesive layer (12), and a PP plastic inner lining layer (13) from the outside to the inside. Tank top assembly: The tank body (1) has a concave groove (2) at the top, and a convex tank top (3) is welded to the bottom of the concave groove (2). The convex tank top (3) has a feed pipe (4) and a power mechanism at the top. The feed pipe (4) has a detachable cover (5) at the top. The power mechanism includes a motor (6) and a gearbox (7) at its output end. The output end of the power mechanism is connected to a stirring shaft (8). The stirring shaft (8) has stirring blades (9) symmetrically welded to its side wall. Circulating spray assembly: The concave groove (2) is provided with an embedded ring pipe (14) on its side wall, and the bottom of the ring pipe (14) is provided with several nozzles (15) with an inclination angle of 45°; Circulation device: Located at the bottom of the tank (1), including a discharge pipe (10). The discharge pipe (10) is provided with a circulation valve (101), a pump (102) and a three-way valve (103) in sequence from front to back. The first port of the three-way valve (103) is connected to the discharge pipe (104), and the second port is connected to the circulation pipe (106) with a fixed seat (105). The end of the circulation pipe (106) is connected to the ring pipe (14).

2. The corrosion-resistant polycarboxylate superplasticizer compound tank according to claim 1, characterized in that, The tank body (1) is embedded with a transparent observation window (16) with anti-corrosion properties. The observation window (16) is composed of a tempered glass layer and a fluoroplastic sealing ring.

3. The corrosion-resistant polycarboxylate superplasticizer compound tank according to claim 1, characterized in that, The tank (1) is provided with multiple support legs (17) at the bottom.

4. The corrosion-resistant polycarboxylate superplasticizer compound tank according to claim 1, characterized in that, The motor (6) is a servo motor.

5. The corrosion-resistant polycarboxylate superplasticizer compound tank according to claim 1, characterized in that, The gearbox (7) is a D-type gearbox.

6. The corrosion-resistant polycarboxylate superplasticizer compound tank according to claim 1, characterized in that, The contact point between the stirring shaft (8) and the convex tank top (3) is treated with a mechanical seal device, which includes a silicon carbide moving ring and a polytetrafluoroethylene stationary ring.

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