Preparation device of polysilicic acid

Abstract

The utility model discloses a preparation device of polysilicic acid, which relates to the technical field of polysilicic acid preparation, and comprises a polymerization reaction tank provided with a water inlet, a dilute acid inlet and a sodium silicate solution inlet respectively; the water inlet is connected to production water through a water electric valve; the dilute acid storage tank is connected with the dilute acid inlet through a dilute acid metering pump; the sodium silicate solution storage tank is connected with the sodium silicate solution inlet through a sodium silicate pumping pump; the stirrer is used for stirring a solution in the polymerization reaction tank; a PLC (programmable logic controller); a turbidity meter is further arranged on the polymerization reaction tank, and the PLC is used for receiving detection data of the turbidity meter. By adopting the scheme, quick blending of the polysilicic acid can be realized on site, the preparation process is controllable, and the problem that the polymerization degree and the activation time of the polysilicic acid are difficult to master in the preparation process is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of polymeric silicic acid preparation technology, and specifically relates to a polymeric silicic acid preparation device. BACKGROUND

[0002] Polymeric silicic acid can accelerate the coagulation process, improve the flocculation structure, and promote the formation of large and dense flocculation in the water treatment process. Polymeric silicic acid has a unique treatment effect on low-temperature and low-turbidity water. It can further adsorb and bridge on the basis of forming small alum flowers with inorganic salt coagulants, increase the size of flocculation, and also can be added before filtration to strengthen filtration and prevent impurities from penetrating the filter tank, thereby playing a filtering aid role.

[0003] However, the use effect of polymeric silicic acid is quite different in actual application. This is because the degree of polymerization and activation time of sodium silicate are difficult to control in the activation process, and gel is easy to appear and lose activity. Polymeric silicic acid is obtained by adding acid to water glass solution, continuously releasing neutral silicic acid monomers and producing polycondensation, and forming anionic inorganic polymer through hydroxyl and oxygen bridges. It is an intermediate product in the polymerization process. If the polymerization is insufficient, the coagulation aid effect is poor, and if the polymerization is excessive, the gel is formed and loses effectiveness. Under strong acid and strong alkali conditions, activated silicic acid does not produce polymerization, the solution does not freeze, and does not have water purification effect. In the neutral and alkaline range, activated silicic acid produces polymerization, and the final solution can gel into a frozen state. Therefore, polymeric silicic acid can only be prepared on site, and the preparation is difficult and requires high requirements, which limits its popularization and application. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to solve the technical problems of prior art, the purpose is to provide a kind of polymeric silicic acid preparation device, using this scheme, polymeric silicic acid can be rapidly deployed on site, and the configuration process is controllable, solve the problem that degree of polymerization and activation time are difficult to master in the preparation process of polymeric silicic acid.

[0005] The utility model discloses the following technical scheme realizes:

[0006] A polymeric silicic acid preparation device, comprising:

[0007] A polymerization reactor is provided with a water inlet, a dilute acid inlet and a sodium silicate solution inlet respectively; the water inlet is connected to the production water by a water motor valve;

[0008] A dilute acid storage tank is connected to the dilute acid inlet by a dilute acid metering pump;

[0009] A sodium silicate solution storage tank is connected to the sodium silicate solution inlet by a sodium silicate pumping pump;

[0010] A blender is used to stir the solution inside the polymerization reactor;

[0011] A PLC controller is used for controlling the opening and closing and flow of the water motor valve, dilute acid metering pump and sodium silicate pumping pump respectively, and controlling the opening and closing and stirring speed of the stirrer;

[0012] The polymeric reaction tank is further provided with a turbidimeter, and the PLC controller is used for receiving the detection data of the turbidimeter.

[0013] In the prior art, the preparation of polymeric silicic acid is difficult and requires high requirements. The utility model provides a preparation device of polymeric silicic acid, which can realize the rapid preparation of polymeric silicic acid on site, and the preparation process is controllable, and the problem that the polymerization degree and activation time are difficult to control during the preparation of polymeric silicic acid is solved. In the specific scheme, a polymeric reaction tank, a dilute acid storage tank and a sodium silicate solution storage tank are included, the dilute acid storage tank is used for conveying dilute acid solution into the polymeric reaction tank through a dilute acid metering pump and a dilute acid inlet, the sodium silicate solution storage tank is used for conveying sodium silicate solution into the polymeric reaction tank through a sodium silicate pumping pump and a sodium silicate solution inlet, and a water inlet is used for conveying external production water into the polymeric reaction tank. During the above conveying process, each electric control component is interlocked and controlled by a PLC controller. For example, according to the set component ratio, the input flow of production water, dilute acid and sodium silicate solution is controlled respectively, and the stirring speed of the stirrer is controlled, so that the mixed solution in the polymeric reaction tank is uniformly stirred. In the actual control process, the turbidity of the mixed solution in the polymeric reaction tank is fed back in real time by a turbidimeter, that is, the polymerization degree of polymeric silicic acid is detected online. In this way, the polymerization degree of polymeric silicic acid required can be quickly controlled according to the preparation of the mixed solution, so that the best use effect is achieved. When the polymerization degree of polymeric silicic acid reaches the best, water is used to dilute it to terminate the polymerization, thereby prolonging the use time of the product and ensuring the use effect of the product. In the actual preparation of polymeric silicic acid, aluminum sulfate can be used instead of sulfuric acid. A colorimeter can also be used instead of a turbidimeter. In addition, the above stirrer is a conventional stirring device and is subjected to corrosion-resistant treatment.

[0014] Further optimization is made to feed back the output flow of production water, dilute acid and sodium silicate solution in real time, so that the component ratio of the mixed solution in the polymeric reaction tank is controlled. A water inlet flow meter is further arranged between the water inlet and the water motor valve. A sodium silicate metering instrument is further arranged between the sodium silicate pumping pump and the sodium silicate solution inlet. The PLC controller is used for receiving the metering data of the water inlet flow meter, sodium silicate metering instrument and dilute acid metering pump respectively.

[0015] Further optimization is made to feed back the PH value of the mixed solution in the polymeric reaction tank in real time. A PH online detector is further arranged on the polymeric reaction tank. The PLC controller is used for receiving the detection data of the PH online detector.

[0016] Further optimization, for real-time feedback of the liquid level and total volume of the mixed solution inside the polymerization tank, the polymerization tank is also provided with a liquid level transmitter, and the PLC controller is used to receive the detection data of the liquid level transmitter.

[0017] Further optimization, for intelligent control of the mixed solution inside the polymerization tank, the bottom of the polymerization tank is also provided with an outlet, and the outlet is provided with a liquid discharge electric valve, and the PLC controller is used to control the opening and closing of the liquid discharge electric valve.

[0018] Further optimization, for convenient observation of the inside of the polymerization tank, the top of the polymerization tank is also provided with an observation hole.

[0019] Further optimization, for convenient realization of the rapid assembly and cleaning of the polymerization tank, the polymerization tank comprises a tank body and a flange cover, the flange cover and the tank body are connected by flange sealing at the top opening, and the water inlet, dilute acid inlet and sodium silicate solution inlet are all arranged on the flange cover. In this scheme, the top of the tank body is open, and the flange sealing connection is realized by the flange cover. After the configuration is completed, the flange cover can be removed to realize the cleaning of the inside of the tank body, the stirrer and the interfaces. The stirrer is installed on the flange cover.

[0020] Further optimization, in the prior art, the pipeline is usually extended into the bottom of the solution to realize the transportation of the solution, but at this time part of the solution enters the inside of the extended part of the pipeline, thereby affecting the stirring effect of the whole solution, so the outlet of the pipeline is arranged above the liquid level to ensure the uniform stirring of the mixed solution as a whole. It is provided that: it further comprises a lifting motor, the lifting motor is fixed inside the flange cover, the output end of the lifting motor extends into the inside of the tank body and is connected with a mounting plate, a plurality of through holes are formed in the mounting plate; the water inlet, dilute acid inlet and sodium silicate solution inlet are all installed with inlet pipelines, a plurality of inlet pipelines are respectively communicated with one through hole in the mounting plate through telescopic pipelines, and the telescopic direction of the telescopic pipeline is the same as the lifting direction of the lifting motor. In this scheme, each inlet pipeline is respectively communicated with one through hole in the mounting plate, so that various liquids transported to the polymerization tank can enter the bottom of the tank body through the communicated through hole, and the lifting height of the lifting motor is controlled by the PLC controller, so that the PLC can gradually lift the height of the mounting plate according to the liquid level height fed back by the liquid level transmitter, while always ensuring that the outlets of the pipelines are above the liquid level, the distance between the outlets of the pipelines and the liquid level is as small as possible, and the range of liquid falling is avoided to cause a large amount of spatter.

[0021] As a redundancy scheme, the telescopic pipeline adopts a corrosion-resistant telescopic hose.

[0022] Further optimization, for the convenience of staff observation, the tank is made of corrosion-resistant transparent material.

[0023] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0024] 1. The utility model provides a preparation device of polymeric silicic acid adopts this scheme, can realize the quick deployment of polymeric silicac in the field, and the configuration process is controllable, solves the problem that the degree of polymerization and activation time are difficult to grasp in the preparation process of polymeric silicic acid.

[0025] 2. The utility model provides a preparation device of polymeric silicic acid adopts turbidimeter online detection polymeric silicic acid's degree of polymerization, can control polymeric silicic acid's degree of polymerization fast and simply, makes it reach the best use effect, when polymeric silicic acid's degree of polymerization reaches the best, immediately dilutes with water and makes it terminate polymerization, prolongs the product's use time, ensures product use effect. In addition, the silica content of water glass solution can be controlled at 1-5%, which is convenient for controlling the degree of polymerization of polymeric silicic acid. If the silica content is too high, the polymerization will be too fast, which may form gel and lose activity. If the silica content is too low, the polymerization will be too slow, which will take a long time to prepare. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model, constitute a part of the application and do not constitute a limitation to the embodiments of the utility model. In the drawings:

[0027] Figure 1 The schematic diagram of the connection of the components of the preparation device provided by the utility model is shown in the figure.

[0028] Figure 2 The schematic diagram of the internal structure of the polymerization reactor provided by the utility model is shown in the figure.

[0029] The marks in the drawings and the corresponding names of the components are as follows:

[0030] 1-polymerization reactor, 101-flange cover, 2-mixer, 3-level transmitter, 4-viewing hole, 5-water inlet, 6-dilute acid inlet, 7-sodium silicate solution inlet, 8-PH online detector, 9-turbidimeter, 10-liquid discharge electric valve, 11-sodium silicate solution storage tank, 12-sodium silicate pumping pump, 13-sodium silicate metering instrument, 14-dilute acid storage tank, 15-dilute acid metering pump, 16-water electric valve, 17-water flow meter, 18-PLC controller, 19-lifting motor, 20-mounting plate, 21-inlet pipeline, 22-telescopic pipeline. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0032] Example 1

[0033] This embodiment 1 provides an apparatus for preparing polymeric silica, such as... Figure 1 As shown, it includes:

[0034] The polymerization reactor 1 is equipped with a water inlet 5, a dilute acid inlet 6, and a sodium silicate solution inlet 7; the water inlet 5 is connected to the production water via a water-electric valve 16.

[0035] A dilute acid storage tank 14 is connected to the dilute acid inlet 6 via a dilute acid metering pump 15.

[0036] Sodium silicate solution storage tank 11, wherein the sodium silicate solution storage tank 11 is connected to sodium silicate solution inlet 7 via sodium silicate pumping pump 12;

[0037] Mixer 2, the mixer 2 being used to stir the solution inside the polymerization reaction tank 1;

[0038] PLC controller 18 is used to control the opening and closing of the water electric valve 16, the dilute acid metering pump 15 and the sodium silicate pump 12 and their flow rates, and to control the opening and closing of the mixer 2 and its mixing speed.

[0039] The polymerization reactor 1 is also equipped with a turbidimeter 9, and the PLC controller 18 is used to receive the detection data of the turbidimeter 9.

[0040] The utility model discloses a preparation device of polymeric silicic acid, which can realize rapid deployment of polymeric silicic acid on site, and the configuration process is controllable, solving the problem that the degree of polymerization and activation time of polymeric silicic acid are difficult to control during the preparation process. In the specific scheme, the polymeric silicic acid preparation device comprises a polymerization reaction tank 1, a dilute acid storage tank 14 and a sodium silicate solution storage tank 11. The dilute acid storage tank 14 is used to deliver dilute acid solution into the polymerization reaction tank 1 through a dilute acid metering pump 15 and a dilute acid inlet 6. The sodium silicate solution storage tank 11 is used to deliver sodium silicate solution into the polymerization reaction tank 1 through a sodium silicate pumping pump 12 and a sodium silicate solution inlet 7. A water inlet 5 is used to deliver external production water into the polymerization reaction tank 1. During the delivery process, each electric control component is interlocked and controlled by a PLC controller 18. For example, according to the set component ratio, the input flow rates of production water, dilute acid and sodium silicate solution are controlled respectively, and the stirring speed of a stirrer 2 is controlled, so that the mixed solution in the polymerization reaction tank 1 is stirred uniformly. During actual control, the turbidity of the mixed solution in the polymerization reaction tank 1 is fed back by a turbidimeter 9 in real time, that is, the degree of polymerization of polymeric silicic acid is detected online. Therefore, according to the deployment of the mixed solution, the degree of polymerization of polymeric silicic acid can be controlled quickly to reach the required degree of polymerization, so that the best use effect is achieved. When the degree of polymerization of polymeric silicic acid reaches the best, water is used to dilute it immediately to terminate the polymerization, thereby prolonging the use time of the product and ensuring the use effect of the product. In the actual preparation of polymeric silicic acid, aluminum sulfate can be used to replace sulfuric acid. A colorimeter can also be used to replace the turbidimeter 9. In addition, the stirrer 2 is a conventional stirring device and is subjected to corrosion-resistant treatment.

[0041] In the embodiment, the water inlet 5 and the water electrodynamic valve 16 are further provided with a water flow meter 17 to feed back the output flow rates of production water, dilute acid and sodium silicate solution in real time, so that the component ratio of the mixed solution in the polymerization reaction tank 1 can be controlled conveniently. The sodium silicate pumping pump 12 and the sodium silicate solution inlet 7 are further provided with a sodium silicate metering instrument 13. The PLC controller 18 is used to receive the metering data of the water flow meter 17, the sodium silicate metering instrument 13 and the dilute acid metering pump 15 respectively.

[0042] In the embodiment, the polymerization reaction tank 1 is further provided with a PH online detector 8 to feed back the PH value of the mixed solution in the polymerization reaction tank 1 in real time. The PLC controller 18 is used to receive the detection data of the PH online detector 8.

[0043] In the embodiment, the polymerization reaction tank 1 is further provided with a liquid level transmitter 3 to feed back the liquid level and total amount of the mixed solution in the polymerization reaction tank 1 in real time. The PLC controller 18 is used to receive the detection data of the liquid level transmitter 3.

[0044] In this embodiment, the mixed solution in the polymerization tank 1 is controlled intelligently. The bottom of the polymerization tank 1 is also provided with an outlet, and a liquid discharge electric valve 10 is arranged at the outlet. The PLC controller 18 is used to control the opening and closing of the liquid discharge electric valve 10.

[0045] In this embodiment, the polymerization tank 1 is also provided with an observation hole 4 at the top for facilitating observation of the inside of the polymerization tank 1.

[0046] Embodiment 2:

[0047] In this embodiment, the polymerization tank 1 is further optimized based on the embodiment 1. As shown in the figure, a specific structure of the polymerization tank 1 is provided. Figure 2

[0048] In this embodiment, the polymerization tank 1 includes a tank body and a flange cover 101. The flange cover 101 is sealingly connected to the top opening of the tank body through a flange. The water inlet 5, the dilute acid inlet 6 and the sodium silicate solution inlet 7 are all arranged on the flange cover 101. In this scheme, the top of the tank body is open, and the flange cover 101 is sealingly connected through a flange. After the configuration is completed, the flange cover 101 can be removed to clean the inside of the tank body, the stirrer 2 and the interfaces. The stirrer 2 is installed on the flange cover 101.

[0049] In the prior art, the pipeline is usually extended into the bottom of the solution to realize the transportation of the solution. However, part of the solution enters the inside of the extended pipeline, which affects the stirring effect of the whole solution. Therefore, the outlet of the pipeline is arranged above the liquid level to ensure the uniform stirring of the mixed solution. The polymerization tank 1 further includes a lifting motor 19. The lifting motor 19 is fixed to the inner side of the flange cover 101. The output end of the lifting motor 19 extends into the inside of the tank body and is connected with a mounting plate 20. A plurality of through holes are arranged on the mounting plate 20. Inlet pipelines 21 are arranged at the water inlet 5, the dilute acid inlet 6 and the sodium silicate solution inlet 7. A plurality of the inlet pipelines 21 are respectively communicated with one of the through holes through telescopic pipelines 22. The telescopic direction of the telescopic pipeline 22 is the same as the lifting direction of the lifting motor 19. In this scheme, each inlet pipeline 21 is respectively communicated with one of the through holes on the mounting plate 20. Therefore, the various liquids transported into the polymerization tank 1 can enter the bottom of the tank body through the communicated through holes. The lifting height of the lifting motor 19 is controlled by the PLC controller 18. Therefore, the PLC can gradually increase the height of the mounting plate 20 according to the real-time feedback of the liquid level height by the liquid level transmitter 3. The outlet of each pipeline is always above the liquid level, and the distance between the outlet of each pipeline and the liquid level is as small as possible to avoid a large range of liquid falling and a large amount of splashing. ​

[0050] In this embodiment, the telescopic pipe 22 is made of corrosion-resistant telescopic hose.

[0051] In this embodiment, the tank is made of transparent corrosion-resistant material for the convenience of staff observation.

[0052] The above specific embodiments have further detailed the purposes, technical solutions and beneficial effects of the utility model, and it should be understood that the above only refers to specific embodiments of the utility model and is not used to limit the protection scope of the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An apparatus for the production of polymeric silicic acid, characterized in that It includes: Polymerization tank (1), the polymerization tank (1) respectively with water inlet (5), dilute acid import (6) and sodium silicate solution import (7) on; The water inlet (5) is connected to the water for production by water electric valve (16); Dilute acid storage tank (14), the dilute acid storage tank (14) is connected by dilute acid metering pump (15) and the dilute acid import (6); Sodium silicate solution storage tank (11), the sodium silicate solution storage tank (11) is connected by sodium silicate pumping pump (12) and sodium silicate solution import (7); Stirring machine (2), the stirring machine (2) is used for stirring the solution inside the polymerization tank (1); PLC controller (18), the PLC controller (18) is used for respectively controlling the opening and closing and flow of water electric valve (16), dilute acid metering pump (15) and sodium silicate pumping pump (12) and control the opening and closing and stirring speed of stirring machine (2); The polymerization tank (1) is also provided with turbidimeter (9), and the PLC controller (18) is used for receiving the detection data of the turbidimeter (9).

2. A device for the preparation of polysilicic acid according to claim 1, characterized in that The water inlet (5) and the water electric valve (16) are also provided with water inlet flow meter (17);The sodium silicate pumping pump (12) and sodium silicate solution import (7) are also provided with sodium silicate metering instrument (13);The PLC controller (18) is used for receiving the metering data of water inlet flow meter (17), sodium silicate metering instrument (13) and dilute acid metering pump (15) respectively.

3. The apparatus of claim 1, wherein the apparatus is configured to produce a polymerized silicic acid having a particle size of 0.1 to 1000 nm. The polymerization tank (1) is also provided with PH on-line detector (8), and the PLC controller (18) is used for receiving the detection data of the PH on-line detector (8).

4. The apparatus of claim 1, wherein The polymerization tank (1) is also provided with liquid level transmitter (3), and the PLC controller (18) is used for receiving the detection data of the liquid level transmitter (3).

5. The apparatus of claim 1, wherein The polymerization tank (1) bottom is also provided with outlet, and the outlet is provided with drainage electric valve (10), and the PLC controller (18) is used for controlling the opening and closing of the drainage electric valve (10).

6. The apparatus of claim 1, wherein The polymerization tank (1) top is also provided with observation hole (4).

7. The apparatus of claim 1, wherein the apparatus is configured to produce a polymerized silicic acid. The polymerization tank (1) includes tank body and flange cover (101), the flange cover (101) and the tank body top opening are connected by flange sealing;The water inlet (5), dilute acid import (6) and sodium silicate solution import (7) are all set up on the flange cover (101).

8. The apparatus of claim 7, wherein the apparatus is configured to produce a polymerized silicic acid having a particle size of 0.1 to 1000 nm. It also includes lifting motor (19), the lifting motor (19) is fixed to the inside of the flange cover (101), the output end of the lifting motor (19) extends to the inside of the tank body, and is connected with mounting plate (20), a plurality of through holes are opened on the mounting plate (20);The water inlet (5), dilute acid import (6) and sodium silicate solution import (7) are all installed with import pipeline (21), a plurality of import pipeline (21) are all communicated with one through hole through telescopic pipeline (22) respectively, and the telescopic direction of telescopic pipeline (22) is same with the lifting direction of lifting motor (19).

9. The apparatus of claim 8, wherein the apparatus is configured to produce a polymerized silicic acid having a particle size of 0.1 to 1000 nm. The telescopic pipeline (22) uses corrosion-resistant telescopic hose.

10. The apparatus of claim 7, wherein the apparatus is characterized by: The tank body is made of corrosion-resistant transparent material. The tank body is made of corrosion-resistant transparent material.

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