Liquid flow velocity steady state control device

Abstract

The utility model discloses a liquid flow velocity steady state control device which comprises a liquid storage tank and a reaction kettle, the liquid storage tank is connected with a transfer liquid level control groove through a first pipeline, and the transfer liquid level control groove is connected with the reaction kettle through a second pipeline. Flow valves and flow pumps for controlling the flow of the pipelines are arranged on the first pipeline and the second pipeline; the transfer liquid level control tank is arranged between the liquid storage tank and the reaction kettle, and the flow of liquid entering the reaction kettle can be maintained in a relatively stable state only by controlling the liquid level of the transfer liquid level control tank within a certain range, so that the consistency of steady state control of fluid in the reaction kettle in a chemical reaction process is effectively improved; and stable-state co-precipitation reaction materials which are completely repeatable in reaction and extremely high in controllability can be obtained, so that the consistency of the materials is improved, the difference of subsequent processing is reduced, and the product quality is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to a liquid flow rate steady-state control device. Background Art

[0002] In the process of preparing zirconium oxide powder, coprecipitation is a commonly used method. This method adjusts the pH value of the reaction system to make metal ions react with the precipitant to form a precipitate, and then obtains the desired zirconium oxide powder through filtering, washing, drying and calcining. However, in actual operation, due to a series of technical problems in traditional coprecipitation devices, the consistency and performance of the prepared zirconium oxide powder are seriously affected.

[0003] First, in traditional co-precipitation devices, acid and alkali liquids are usually stored in high-level liquid storage tanks and flow into the reactor by gravity. As the reaction proceeds, the liquid level in the liquid storage tank gradually decreases, causing the flow rate of the acid and alkali liquid to continue to decrease. This change in flow rate not only affects the uniformity and stability of the precipitation reaction, but also increases the uncertainty during the operation.

[0004] Secondly, the temperature of the acid and alkali liquid also has an important influence on the precipitation reaction. Under different weather conditions, the temperature of the acid and alkali liquid may fluctuate greatly, especially in winter and summer. This temperature difference not only affects the viscosity of the liquid, but also affects the accuracy of the online pH meter, which further affects the state of the precipitated material and the performance of the final product.

[0005] In addition, the traditional co-precipitation device lacks the automatic control function of the flow rate and temperature of the acid and alkali liquids. Operators need to frequently manually adjust the control valves and temperature equipment to maintain the stability of the flow rate and temperature. This operation mode not only increases the workload and labor intensity, but also easily introduces human errors, resulting in unstable product quality.

[0006] That is, the traditional co-precipitation device has problems such as unstable flow rate, large temperature fluctuation and complicated operation in the process of preparing zirconium oxide powder, which seriously affect the consistency and performance of the product. Therefore, it is urgent to develop a device that can automatically control the flow rate and temperature of acid and alkali liquids, which is of great significance for improving the preparation quality of zirconium oxide powder. Utility Model Content

[0007] In order to overcome the deficiencies of the prior art, the utility model provides a liquid flow rate steady-state control device which can improve production stability and consistency.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a liquid flow rate steady-state control device, including a liquid storage tank and a reactor, the liquid storage tank is connected to a transfer liquid level control tank through a first pipeline, the transfer liquid level control tank is connected to the reactor through a second pipeline, and the first pipeline and the second pipeline are both provided with a flow valve and a flow pump for controlling the pipeline flow.

[0009] Preferably, a liquid level meter is installed in the transfer liquid level control tank.

[0010] Preferably, the liquid level gauge is an acid and alkali resistant double float liquid level gauge.

[0011] Preferably, a pipeline temperature controller and a thermometer are installed on the second pipeline.

[0012] Preferably, the thermometer is installed in a region of the second pipeline close to an outlet.

[0013] Preferably, the second pipeline is provided with a first branch and a second branch, the first branch and the second branch are connected in parallel, the first branch and the second branch are provided with the same pipe resistance and are arranged at the same height, the first branch is connected to a temporary liquid storage tank for temporarily storing unqualified liquid, the second branch is connected to the reactor, and the first branch and the second branch are both provided with control valves.

[0014] Preferably, the control valve is an acid and alkali resistant solenoid valve.

[0015] Preferably, a flow meter is provided on the second pipeline.

[0016] Preferably, the flow valve is an acid and alkali resistant solenoid valve.

[0017] Preferably, the flow pump is an acid and alkali resistant peristaltic pump.

[0018] The technical effect of the utility model is as follows: by setting a transfer liquid level control tank between the liquid storage tank and the reactor, the liquid flow entering the reactor can be maintained in a relatively stable state by only controlling the liquid level of the transfer liquid level control tank within a certain range, thereby effectively improving the consistency of the steady-state control of the fluid in the chemical reaction process in the reactor, and obtaining a completely repeatable and highly controllable steady-state co-precipitation reaction material, which improves the consistency of the material, reduces the differences in subsequent processing, and effectively improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] The main technical features in the figure are marked as follows: 1. liquid storage tank; 11. first pipeline; 2. transfer liquid level control tank; 21. second pipeline; 211. first branch; 212. second branch; 213. temporary liquid storage tank; 214. control valve; 3. reactor; 4. flow valve; 5. acid and alkali resistant peristaltic pump; 6. acid and alkali resistant double float level gauge; 7. temperature controller; 8. flow regulating valve; 9. flow meter; 10. thermometer. DETAILED DESCRIPTION

[0021] The present invention will be further described below through specific implementation modes and accompanying drawings.

[0022] like Figure 1 A liquid flow rate steady-state control device comprises a liquid storage tank 1 and a reactor 3. The discharge port at the bottom of the liquid storage tank 1 is connected to the feed port of the transfer liquid level control tank 2 through a first pipe 11. A flow valve 4 and an acid- and alkali-resistant peristaltic pump 5 are sequentially installed on the first pipe 11. The flow valve 4 is an acid- and alkali-resistant solenoid valve. The flow rate of the liquid can be accurately adjusted during the reaction process through the flow regulating valve 8. The flow rate of the adjusted pipeline 21 is precisely controlled by the transfer liquid level control tank 2 due to the initial liquid level, and the flow rate displayed by the flow meter 9 will not decrease or increase continuously with the passage of time.

[0023] Furthermore, an acid- and alkali-resistant double-float liquid level gauge 6 is installed in the transfer liquid level control tank 2; the discharge port of the transfer liquid level control tank 2 is connected to the feed port of the reactor 3 through the second pipeline 21, and the acid- and alkali-resistant peristaltic pump 5, pipeline temperature controller 7, flow regulating valve 8, flow meter 9 and thermometer 10 are installed on the second pipeline 21 in sequence, and the thermometer 10 is installed at one end of the second pipeline 21 close to the reactor 3, and the flow regulating valve 8 is an acid- and alkali-resistant solenoid valve; the flow control valve 4 and the acid- and alkali-resistant peristaltic pump are judged and controlled according to the liquid level feedback of the acid- and alkali-resistant double-float liquid level gauge 6 5 is switched on and off simultaneously to ensure that the liquid level difference in the transfer liquid level control tank 2 is within a very small range. According to the Bernoulli equation, we know that the flow rate of the fluid in the pipeline is affected by the initial reference liquid level. The higher the position, the faster the flow rate in the pipeline. Reducing the liquid level difference during the flow of the liquid can greatly stabilize the actual flow rate of the liquid in the pipeline. At the same time, the pipeline temperature controller 7 and the thermometer 10 are used to maintain the liquid in the pipeline at a precise temperature, and the flow control valve 8 is used to achieve true steady-state flow of the liquid to ensure controllable and consistent regulation of the conditions during the chemical reaction.

[0024] Further, two pipeline branches are provided on the discharge end of the second pipeline 21, and the two pipeline branches are a first branch 211 and a second branch 212. The first branch 211 and the second branch 212 are connected in parallel to the main line of the second pipeline 21, and both are provided with the same pipe resistance and have the same spatial height, wherein the first branch 211 is connected to the temporary liquid storage tank 213, and the second branch 212 is connected to the reactor 3, and the first branch 211 and the second branch 212 are both provided with a control valve 214, so that The control valve 214 is also an acid- and alkali-resistant solenoid valve; when the flow rate and temperature of the liquid in the pipeline are unstable, it can first enter the temporary liquid storage tank 213, so as to ensure that the switching of the solenoid valve will not cause excessive differences in the temperature and flow rate of the liquid in the pipeline; at the same time, the two branches are equivalent branches, which can ensure that after the fluid in the pipeline reaches a steady state of temperature and flow rate, when the control valve 214 on one branch is closed and the solenoid valve of the control valve 214 on the other branch is opened, the fluid in the pipeline will not lose the steady-state balance of temperature and flow rate.

[0025] The specific implementation process of the utility model is as follows: open the flow valve 4 and the pipeline acid and alkali resistant peristaltic pump 5 on the first pipeline 11, and pass the fluid from the liquid storage tank into the transfer liquid level control tank through the first pipeline, and then open the pipeline acid and alkali resistant peristaltic pump 5 on the second pipeline 21, and the fluid will pass into the reactor through the second pipeline;

[0026] At this time, the flow regulating valve 8 is adjusted according to the display of the flow meter 9 to adjust the flow rate of the fluid in the second pipeline to an appropriate flow range, and then the temperature controller 7 is turned on. According to the measurement result of the thermometer 10 on the pipeline, the temperature controller 7 is adjusted so that the liquid temperature in the second pipeline reaches a set range; according to the influence of the liquid temperature on the density, viscosity and flow rate, the above operation is repeated until the flow rate and temperature of the fluid entering the reactor 3 are adjusted to the set stable state.

[0027] At the same time, according to the upper and lower float liquid level feedback signals of the acid and alkali resistant double float liquid level gauge, the switch states of the flow valve 4 and the pipeline acid and alkali resistant peristaltic pump 5 of the first pipeline 11 are controlled and adjusted, that is, when the liquid level on the transfer liquid level control tank 2 is higher than the upper float of the acid and alkali resistant double float liquid level gauge, the flow valve 4 and the pipeline acid and alkali resistant peristaltic pump 5 of the first pipeline 11 are closed accordingly; when the liquid level on the transfer liquid level control tank 2 is lower than the lower float of the acid and alkali resistant double float liquid level gauge, the flow valve 4 and the pipeline acid and alkali resistant peristaltic pump 5 of the first pipeline 11 are opened accordingly.

[0028] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used on similar products. Any changes or modifications made by any technician in the field of the present invention are covered by the patent scope of the present invention.

Claims

1. A liquid flow rate steady-state control device, comprising a liquid storage tank (1) and a reaction kettle (3), characterized in that: The liquid storage tank is connected to a transfer liquid level control tank (2) via a first pipeline (11), and the transfer liquid level control tank (2) is connected to a reaction kettle (3) via a second pipeline (21). Both the first pipeline (11) and the second pipeline (21) are provided with a flow valve (4) and a flow pump for controlling pipeline flow.

2. A liquid flow rate steady-state control device according to claim 1, characterized in that: A liquid level meter is installed in the transfer liquid level control tank (2).

3. A liquid flow rate steady-state control device according to claim 2, characterized in that: The liquid level meter is an acid and alkali resistant double float liquid level meter (6).

4. A liquid flow rate steady-state control device according to claim 1, characterized in that: A pipeline temperature controller (7) and a thermometer (10) are installed on the second pipeline (21).

5. A liquid flow rate steady-state control device according to claim 4, characterized in that: The thermometer (10) is installed in a region of the second pipe (21) close to the outlet.

6. A liquid flow rate steady-state control device according to claim 1, characterized in that: The second pipeline (21) is provided with a first branch (211) and a second branch (212); the first branch (211) and the second branch (212) are connected in parallel; the first branch (211) and the second branch (212) have the same pipe resistance and are arranged at the same height; the first branch (211) is connected to a temporary liquid storage tank (213) for temporarily storing unqualified liquid; the second branch (212) is connected to the reactor (3); and control valves (214) are provided on both the first branch (211) and the second branch (212).

7. A liquid flow rate steady-state control device according to claim 6, characterized in that: The control valve (214) is an acid- and alkali-resistant solenoid valve.

8. A liquid flow rate steady-state control device according to claim 1, characterized in that: The second pipeline (21) is provided with a flow meter (9).

9. A liquid flow rate steady-state control device according to claim 1, characterized in that: The flow valve (4) is an acid and alkali resistant electromagnetic valve.

10. A liquid flow rate steady-state control device according to claim 1, characterized in that: The flow pump is an acid and alkali resistant peristaltic pump (5).

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