Centrifugal pump heat exchange self-circulation system for lithium carbonate production

Abstract

The utility model relates to a centrifugal pump heat exchange self-circulation system for lithium carbonate production, which comprises a water tank communicated with a sealing cavity of a centrifugal pump through a water inlet pipe and a water return pipe, and an automatic water replenishing device for replenishing water to the water tank, and an impeller for guiding mechanical seal water to flow towards the water return pipe is arranged on a moving ring of the centrifugal pump. When the mechanical seal device is used and a centrifugal pump is used, the movable ring drives the impeller to rotate, the impeller conveys mechanical seal water into the water tank through the water return pipe, meanwhile, water in the water tank flows into the sealing cavity along the water inlet pipe, self-circulation of the mechanical seal water is achieved, and therefore the centrifugal pump is cooled; whether the mechanical seal water leaks or not is judged according to the condition of the supplementing water amount of the mechanical seal water in the automatic water supplementing device, and therefore whether the mechanical seal system of the centrifugal pump leaks or not can be conveniently detected.

Description

Technical Field

[0001] This utility model relates to the field of lithium carbonate production, and in particular to the field of centrifugal pump technology, specifically a centrifugal pump heat exchange self-circulation system for lithium carbonate production. Background Technology

[0002] In lithium carbonate production, centrifugal pumps are used in more than a dozen processes. Due to the material characteristics, most centrifugal pumps use double-end mechanical seals. Moreover, the materials transported by centrifugal pumps in each process are different, and the materials must not be mixed with each other and must not be contaminated by any external medium except for clean condensate.

[0003] When using a single mechanical seal cooling and protection system for simultaneous protection, leaks at the mechanical seal medium end are difficult to detect and locate. Mixing different material media severely impacts product quality and production efficiency. Existing centrifugal pump dual-end mechanical seal systems suffer from difficult-to-detect leaks, and traditional multi-stage independent systems are costly and impractical. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a centrifugal pump heat exchange self-circulation system for lithium carbonate production. While cooling the centrifugal pump, it replenishes the water supply to the machine casing via an automatic water replenishment device. The amount of water replenished to the mechanical seal is used to determine whether there is a leak in the mechanical seal water, thus facilitating the detection of leaks in the centrifugal pump mechanical seal system.

[0005] This utility model is achieved through the following technical solution: a centrifugal pump heat exchange self-circulation system for lithium carbonate production, including a water tank connected to the centrifugal pump sealing cavity through an inlet pipe and a return pipe, and an automatic water replenishment device for replenishing water to the water tank. The centrifugal pump is provided with an impeller on the moving ring to guide the sealing water to flow to the return pipe.

[0006] In use, the centrifugal pump operates by the rotating ring driving the impeller to rotate. The impeller sends the mechanical seal water to the water tank through the return water pipe. Simultaneously, the water in the water tank flows into the sealing cavity through the inlet pipe, achieving self-circulation of the mechanical seal water and thus cooling the centrifugal pump. When a leak occurs, the amount of mechanical seal water replenished by the automatic water replenishment device is used to determine whether there is a leak in the mechanical seal water system of the centrifugal pump.

[0007] Preferably, the automatic water replenishment device includes a water replenishment pipe inserted into the water tank, a float valve installed at the outlet of the water replenishment pipe, and a water flow indicator and a flow meter installed on the water replenishment pipe.

[0008] When this preferred solution is in use, if water is lost from the water tank and the liquid level drops, the float valve will drop and transmit a signal to the control console. The control console will then send water to the water tank through the water supply pipe, thereby achieving automatic water replenishment in the water tank. Under normal circumstances, there will be losses due to the loss of the mechanical seal water, so water needs to be replenished periodically. If the water tank level is automatically replenished multiple times within the cycle or if the amount of water replenished is large, leakage may occur, which will remind the staff to carry out timely maintenance.

[0009] Preferably, the inlet of the water supply pipe is connected to the plate heat exchanger. This preferred embodiment, through the use of the plate heat exchanger, facilitates further cooling of the mechanical seal water entering the water tank, thereby reducing the temperature of the mechanical seal water.

[0010] Preferably, a fan is also provided on the outside of the water tank to blow air into the water tank. This preferred solution facilitates physical cooling of the water sealed inside the water tank by means of a fan.

[0011] Preferably, a breathing tube is provided on the top surface of the water tank, a filter screen is provided at the opening of the breathing tube, and a breathing valve is provided inside the breathing tube.

[0012] This preferred solution maintains the pressure inside the water tank by using a breather tube, and reduces the amount of impurities entering the water tank by using a filter and a breather valve.

[0013] Preferably, the water tank is also equipped with a liquid level sensor and a temperature sensor. This preferred embodiment uses the liquid level sensor to better understand the water level of the mechanical seal water in the tank, and the temperature sensor to facilitate understanding the temperature of the mechanical seal water.

[0014] The beneficial effects of this utility model are as follows: When the centrifugal pump is in use, the moving ring drives the impeller to rotate, and the impeller sends the mechanical seal water to the water tank through the return water pipe. At the same time, the water in the water tank flows into the sealing cavity through the inlet water pipe to realize the self-circulation of the mechanical seal water, thereby cooling the centrifugal pump. When leakage occurs, the amount of mechanical seal water replenished by the automatic water replenishment device is used to determine whether there is a leak in the mechanical seal water, thus facilitating the detection of whether there is a leak in the centrifugal pump mechanical seal system. When the water in the water tank is lost and the liquid level drops, the float valve drops and transmits a signal to the control console. The control console sends water to the water tank through the water replenishment pipe, thereby realizing automatic water replenishment in the water tank. Under normal circumstances, there will be loss of mechanical seal water, so water is replenished periodically. When the water level in the water tank is automatically replenished multiple times within the cycle or when the amount of water replenished is large, leakage may occur, which will remind the staff to repair it in time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the moving ring and impeller.

[0017] As shown in the figure:

[0018] 1. Centrifugal pump, 2. Water tank, 3. Inlet pipe, 4. Return pipe, 5. Float valve, 6. Make-up pipe, 7. Breathing pipe, 8. Flow indicator, 9. Flow meter, 10. Plate heat exchanger, 11. Impeller, 12. Moving ring. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0020] See attached document Figure 1-2 This utility model discloses a centrifugal pump 1 heat exchange self-circulation system for lithium carbonate production, including a water tank 2 located above the centrifugal pump 1, and an automatic water replenishment device for replenishing water to the water tank 2. The water tank 2 is provided with an inlet pipe 3 and a return pipe 4 that are connected to the sealed cavity of the centrifugal pump 1. The water tank 2 is provided with a return water port connected to the return water pipe 4 and an inlet water port connected to the inlet pipe 3. The return water port is located above the inlet water port.

[0021] The centrifugal pump 1 has an impeller 11 on its rotating ring 12 that guides the flow of sealing water to the return water pipe 4. The impeller 11 is existing technology.

[0022] The automatic water replenishment device includes a water replenishment pipe 6 inserted into the water tank 2, a float valve 5 installed at the outlet of the water replenishment pipe 6, and a water flow indicator 8 and a flow meter 9 installed on the water replenishment pipe 6. The inlet of the water replenishment pipe 6 is connected to the plate heat exchanger 10.

[0023] The water tank 2 is also equipped with a fan on its outside to blow air into it. A breather tube 7, communicating with the inner cavity of the water tank 2, is located on the top surface of the water tank 2. A filter screen is installed at the opening of the breather tube 7, and a breather valve is installed inside the breather tube 7. The water tank 2 is also equipped with a liquid level sensor and a temperature sensor.

[0024] Float valve 5, water flow indicator 8, flow meter 9, level sensor, and temperature sensor are all electrically connected to the control panel.

[0025] In use, the centrifugal pump 1 operates with the rotating ring 12 driving the impeller 11 to rotate. The impeller 11 sends the mechanical seal water to the water tank 2 through the return water pipe 4. Simultaneously, the water in the water tank 2 flows into the sealing cavity through the inlet pipe 3, achieving self-circulation of the mechanical seal water and thus cooling the centrifugal pump 1. When leakage occurs, the automatic water replenishment device is used to determine whether the mechanical seal water is leaking, facilitating the detection of leaks in the mechanical seal system of the centrifugal pump 1. When water in the water tank 2 is lost and the liquid level drops, the float valve 5 descends and transmits a signal to the control console. The control console then sends water to the water tank 2 through the water replenishment pipe 6, thus achieving automatic water replenishment in the water tank 2. Under normal circumstances, there will be losses of mechanical seal water, so periodic water replenishment is necessary. When the water level in the water tank 2 is automatically replenished multiple times within the cycle or when the amount of water replenished is large, leakage may occur, prompting the staff to perform timely maintenance.

[0026] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A centrifugal pump heat exchange self-circulation system for lithium carbonate production, characterized in that: The water tank (2) is communicated with the sealing cavity of the centrifugal pump through the water inlet pipe (3) and the water return pipe (4), and an automatic water supplement device is arranged to supplement water to the water tank (2), and a impeller (11) is arranged on the rotating ring (12) of the centrifugal pump to guide the sealing water to flow to the water return pipe (4).

2. The centrifugal pump heat exchange self-circulation system for lithium carbonate production according to claim 1, characterized in that: The automatic water supplement device comprises a water supplement pipe (6) inserted into the water tank (2), a float ball valve (5) arranged at the water outlet of the water supplement pipe (6), and a water flow indicator (8) and a flow meter (9) arranged on the water supplement pipe (6).

3. The centrifugal pump heat exchange self-circulation system for lithium carbonate production according to claim 2, characterized in that: The water inlet of the water supplement pipe (6) is communicated with the plate heat exchanger (10).

4. The centrifugal pump heat exchange self-circulation system for lithium carbonate production according to claim 1, characterized in that: A fan is further arranged outside the water tank (2) to blow air to the water tank (2).

5. The centrifugal pump heat exchange self-circulation system for lithium carbonate production according to claim 1, characterized in that: A breathing pipe (7) is arranged on the top surface of the water tank (2), a filter screen is arranged at the pipe opening of the breathing pipe (7), and a breathing valve is arranged in the breathing pipe (7).

6. The centrifugal pump heat exchange self-circulation system for lithium carbonate production according to claim 1, characterized in that: A liquid level sensor and a temperature sensor are further arranged in the water tank (2).

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