A liquid slurry stabilizing feed device

Abstract

The utility model discloses a kind of liquid slurry stable feeding devices, including metering tank, the upper portion or top of metering tank is equipped with self-circulation inlet, the bottom of metering tank is equipped with liquid outlet, liquid outlet is connected with material circulating pump by first pipeline, material circulating pump is connected with self-circulation inlet by second pipeline, first pipeline is connected with first material conveying pipe on the position close to liquid outlet, second material conveying pipe is connected on second pipeline, first material conveying pipe and second material conveying pipe are communicated with second pipeline by four-way, first material conveying pipe and second material conveying pipe are vertically arranged with second pipeline. The utility model avoids the influence of bubble to flowmeter, avoids that slurry is settled and blocks pipeline or regulating valve due to insufficient power, guarantees that material flow is stable, accurate.

Description

Technical Field

[0001] This utility model relates to a stable feeding device for liquid slurry, and more particularly to a stable feeding device for accelerator M slurry used in the synthesis of accelerator DZ. Background Technology

[0002] Accelerator M is the raw material for the synthesis of accelerator DZ. In the reaction process, the slurry of accelerator M is generally reacted with dicyclohexylamine to generate accelerator DZ.

[0003] The slurry of accelerator M is typically a liquid with a solid content of 10%-35%. During the reaction, the slurry flows from a metering tank (high-level tank) into the DZ reactor (low-level tank) using the liquid level difference. The flow rate and feed volume are controlled by regulating valves and flow meters installed on the delivery pipeline. However, as the liquid level decreases, the pressure also decreases, and the flow rate of the accelerator M slurry gradually decreases, failing to meet production requirements. Furthermore, the reduced flow rate can cause the deposition of solid particles in the slurry, clogging the regulating valves and affecting flow stability. In addition, air bubbles are generated in the accelerator slurry during stirring or flow in the pipeline. These bubbles interfere with the flow meter, causing a deviation between the actual flow rate and the flow rate displayed by the flow meter. This results in the actual material entering the reactor not meeting expectations, affecting the reaction effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a stable feeding device for liquid slurry. This device is particularly suitable for the stable feeding of slurries that are prone to sedimentation, such as accelerator M. It can prevent the sedimentation of solid particles in the slurry from clogging pipes or regulating valves, and also avoid flow fluctuations caused by air bubbles, ensuring stable and accurate feeding of liquid slurry.

[0005] The specific technical solution of this utility model is as follows: A liquid slurry stabilizing feed device includes a metering tank, a self-circulating inlet at the top or top of the metering tank, and a liquid outlet at the bottom of the metering tank. The liquid outlet is connected to a transfer pump via a first pipe, and the transfer pump is connected to the self-circulating inlet via a second pipe. A first material conveying pipe is connected to the first pipe near the liquid outlet, and a second material conveying pipe is connected to the second pipe. The first material conveying pipe and the second material conveying pipe are connected to the second pipe via a four-way connector. The first material conveying pipe and the second material conveying pipe are arranged perpendicularly to the second pipe.

[0006] Furthermore, valves are provided on both the first pipeline and the first material conveying pipe to control the flow direction of the liquid slurry in the metering tank.

[0007] Furthermore, the valve of the first pipeline is located below the first material conveying pipe.

[0008] Furthermore, a valve is provided near the self-circulation inlet of the second pipe so that air bubbles in the pipe can enter the metering tank through the second pipe.

[0009] Furthermore, a pressure gauge is installed on the second pipe between the transfer pump and the four-way valve.

[0010] Furthermore, the second material conveying pipe is equipped with a flow meter and a regulating valve, which are interlocked. The flow meter controls the size of the regulating valve to achieve stable flow of the slurry. The flow meter and the regulating valve are interlocked via an electrical connection.

[0011] Furthermore, a sight glass is provided on the second material conveying pipe to observe the liquid slurry in the second material conveying pipe.

[0012] Furthermore, the second material conveying pipe is connected to the reactor, allowing the liquid slurry to enter the reactor at a stable and accurate flow rate for reaction.

[0013] Furthermore, a direct bypass is connected in parallel to both ends of the regulating valve, and a valve is installed on the direct bypass. This direct bypass can be used in an emergency when the regulating valve is damaged.

[0014] Furthermore, the metering tank is equipped with a stirring device.

[0015] This invention, through the design of the pipeline between the metering tank and the reaction vessel, allows air bubbles in the liquid slurry during transportation to flow back into the metering tank via a four-way valve. The slurry flowing through the flow meter is air-free, ensuring a stable and accurate flow rate into the reaction vessel and guaranteeing the accuracy of the reactant dosage. Furthermore, the use of a transfer pump to power the slurry transport prevents sedimentation and blockage of pipelines or regulating valves due to insufficient power, further ensuring stable slurry flow. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Among them, 1. Metering tank, 2. First pipeline, 3. Transfer pump, 4. Second pipeline, 5. First material conveying pipe, 6. Four-way valve, 7. Second material conveying pipe, 8. Flow meter, 9. Regulating valve, 10. Pressure gauge, 11. Sight glass, 12. Reactor. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions involving "first", "second", etc. in this utility model are only used for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] Example A liquid slurry stabilizing feed device, the structure of which is as follows: Figure 1 As shown, the device includes a metering tank 1, which is used to hold liquid slurry. The metering tank is equipped with a self-circulation inlet, a liquid outlet, and a liquid inlet. The liquid inlet and the self-circulation inlet are preferably located at the top or upper part of the metering tank. The liquid inlet is used to load the liquid slurry, and the liquid outlet and the self-circulation inlet are connected by a pipe to achieve self-circulation of the liquid slurry. The metering tank also includes a stirring device, such as a stirring paddle or stirring blade, for stirring the liquid slurry.

[0020] A first pipe 2 is connected to the outlet of the metering tank. The first pipe is connected to the inlet of a transfer pump 3, and the outlet of the transfer pump is connected to a second pipe 4. The second pipe is connected to a self-circulation inlet. Through the action of the first pipe, the second pipe, and the transfer pump, the liquid slurry in the metering tank can be discharged from the outlet and pumped in through the self-circulation inlet, realizing the self-circulation of the slurry. A tee is installed near the outlet of the first pipe. A first material conveying pipe 5 is connected to the first pipe through the tee. A four-way connector 6 is installed on the second pipe. One port of the four-way connector is connected to the first material conveying pipe, the other port is connected to the second material conveying pipe 7, and the other two ports are connected to the second pipe. The second pipe is vertically arranged, while the first and second material conveying pipes are horizontally arranged, and the second pipe is perpendicular to both the first and second material conveying pipes. Valves are installed on the first pipe, the second pipe, and the first material conveying pipe. The valve on the first pipe is located between the tee and the transfer pump, and the valve on the second pipe is located at the self-circulation inlet. A flow meter 8 and a regulating valve 9 are installed on the second material conveying pipe. The flow meter and the regulating valve are interlocked via an electrical connection, ensuring stable flow of the slurry. A direct bypass is connected in parallel to both ends of the regulating valve, and a valve is installed on the direct bypass. This direct bypass can be used in case the regulating valve fails. The other end of the second material conveying pipe is connected to the reactor 12, allowing the liquid slurry to enter the reactor stably and accurately for reaction.

[0021] Furthermore, a pressure gauge 10 is installed on the second pipe between the transfer pump and the four-way valve to facilitate the determination of the pressure inside the pipe.

[0022] Furthermore, a sight glass 11 is provided on the second material conveying pipe to observe the liquid slurry in the second material conveying pipe.

[0023] Furthermore, the elevation difference between the metering tank and the reaction vessel creates a level difference between the materials inside them. The metering tank is at a higher elevation, while the reaction vessel is at a lower elevation; this level difference allows the liquid slurry in the metering tank to automatically flow into the reaction vessel.

[0024] This invention relates to a stable feeding device suitable for conveying materials that are in slurry form, prone to sedimentation, and easily contain air bubbles during transport. It is particularly suitable for conveying liquid slurries containing accelerator M with a solids content of 10-35%. This invention utilizes the principle that air bubbles rise due to buoyancy to expel them during slurry transport, achieving simple gas-liquid separation. This eliminates the influence of air bubbles on the accuracy of the flow meter, allowing the slurry to flow steadily into the reaction vessel to react with other materials, thus achieving stable slurry feeding.

[0025] Taking accelerator M slurry as an example, the working process of this utility model is explained as follows: 1. Accelerator M slurry is loaded into the metering tank through the inlet. The valves on the first and second material delivery pipes are opened, the regulating valve is opened, the flow meter is set, and the valve on the first pipe is closed. The material in the metering tank flows into the reactor through the first and second material delivery pipes due to the liquid level difference. Quantitative feeding is achieved through the interlock between the regulating valve and the flow meter. Based on the principle of air bubbles rising due to buoyancy, when the material flows through the four-way valve, the air bubbles rise and enter the second pipe, then rise into the metering tank. Thus, the material entering the second material delivery pipe through the four-way valve is bubble-free. The bubble-free slurry enters the reactor through the flow meter and regulating valve, thereby avoiding the influence of air bubbles on the flow meter and ensuring the accuracy of the flow meter measurement and the stability of the feed flow rate.

[0026] 2. When the material in the metering tank is low, the pressure difference decreases, and the material flow rate slows down. At this point, close the valve on the first material conveying pipe, open the valve on the first pipeline, and start the transfer pump. Adjust the power of the transfer pump using a pressure gauge to ensure that the material continues to flow steadily into the reactor at the predetermined flow rate. The material enters the reactor through the first pipeline, the four-way valve, and the second material conveying pipe. Similarly, after passing through the four-way valve, the pressure at the four-way valve is balanced. Under the action of buoyancy, air bubbles rise along the four-way valve and continue to rise along the second pipeline into the metering tank. Material without air bubbles after passing through the four-way valve enters the second material conveying pipe, and then enters the reactor through the flow meter and regulating valve. Due to the action of the transfer pump, the pump outlet pressure is consistent, the slurry has sufficient kinetic energy, and it is not easy to clog the pipeline regulating valve, allowing the slurry to flow steadily into the reactor.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model. Those skilled in the art can make various similar representations under the guidance of the present utility model without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A liquid slurry stabilizing feed device, characterized in that: The device includes a metering tank, with a self-circulation inlet at the top or top and a liquid outlet at the bottom. The liquid outlet is connected to a transfer pump via a first pipe, and the transfer pump is connected to the self-circulation inlet via a second pipe. A first material conveying pipe is connected to the first pipe near the liquid outlet, and a second material conveying pipe is connected to the second pipe. The first and second material conveying pipes are connected to the second pipe via a four-way connector, and the first and second material conveying pipes are perpendicular to the second pipe.

2. The liquid slurry stabilizing feed device according to claim 1, characterized in that: Both the first pipeline and the first material conveying pipe are equipped with valves.

3. The liquid slurry stabilizing feed device according to claim 2, characterized in that: The valve of the first pipeline is located below the first material conveying pipe.

4. The liquid slurry stabilizing feed device according to claim 1, characterized in that: A valve is installed near the self-circulation inlet of the second pipeline.

5. The liquid slurry stabilizing feed device according to claim 1, characterized in that: A pressure gauge is installed on the second pipe between the transfer pump and the four-way valve.

6. The liquid slurry stabilizing feed device according to claim 1, characterized in that: The second material conveying pipe is equipped with a flow meter and a regulating valve, and an interlock is provided between the flow meter and the regulating valve.

7. The liquid slurry stabilizing feed device according to claim 6, characterized in that: The regulating valve has a direct bypass connected in parallel at both ends, and a valve is provided on the direct bypass.

8. The liquid slurry stabilizing feed device according to claim 1, characterized in that: The second material conveying pipe is equipped with a sight glass.

9. The liquid slurry stabilizing feeder according to claim 1, characterized in that: The second material conveying pipe is connected to the reactor.

10. The liquid slurry stabilizing feeder according to claim 1, characterized in that: The metering tank is equipped with a stirring device.

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