Parallel-connection cleaning pipeline structure of multiple flash tanks

Abstract

The utility model relates to the technical field of chemical equipment, and provides a multi-flash-tank parallel cleaning pipeline structure which comprises flash tanks, a mixing tank and a connecting assembly. Wherein the plurality of flash tanks are arranged, and the inlets of the flash tanks are used for being connected with the output ends of the reaction kettles; the mixing tank is used for mixing materials; a plurality of groups of connecting assemblies are arranged in one-to-one correspondence with the plurality of flash tanks, each group of connecting assembly comprises a discharge pipeline and a drainage pipeline, the outlets of the flash tanks can be selectively communicated with the mixing tank through the discharge pipelines or communicated with the water collecting tank through the drainage pipelines, and the water collecting tank is used for containing hot water. Thus, materials in the multiple flash tanks can be collected and mixed in the mixing tank, when a plurality of flash tanks need to be cleaned, other flash tanks can continue to work, and hot water discharged from the cleaned flash tanks can be discharged into the water collecting tank and is prevented from being mixed with the materials in the mixing tank.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a parallel cleaning pipeline structure for multiple flash tanks. Background Technology

[0002] With the booming development of my country's new energy vehicle industry and the gradual depletion of my country's high-quality nickel and cobalt ore resources, the industry's demand for Ni, Co, and Mn metals in new energy ternary materials is increasing. Developing laterite nickel ore with large reserves but low nickel grades has gradually become a hot topic in the industry. The hydrometallurgical route of sulfuric acid leaching under high temperature and high pressure is currently one of the mainstream smelting processes for laterite nickel ore. Before entering the next solid-liquid separation process, the leached material must undergo cooling and depressurization treatment, and the flash tank is the main equipment for this treatment.

[0003] Flash evaporation involves transferring high-pressure materials from a reaction vessel into a lower-pressure container. The sudden pressure drop transforms these materials into saturated water vapor and saturated solids. Since the boiling point of a substance is proportional to its pressure, this process allows high-pressure, high-temperature materials to undergo decompression, lowering their boiling point before flash evaporation. Patent CN1136935C discloses a parallel flash evaporation process for terephthalic acid mother liquor. This involves adding a second flash evaporator and its associated pump to an existing mother liquor flash evaporator, allowing the two flash evaporators to serve as backups for each other. Both can operate independently and perform separate alkaline washing, ensuring the safe and stable operation of the main system.

[0004] During normal production, materials from multiple flash tank units are transported to the mixing tank in the next process for mixing before further processing. This structure has the following problems: a large amount of hot water generated during the shutdown, maintenance, and cleaning of one flash tank unit also enters the mixing tank, severely impacting the performance of other flash tank units in normal production and hindering the control of the next process.

[0005] Therefore, there is an urgent need for a multi-flash tank parallel cleaning pipeline structure to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to propose a parallel cleaning pipeline structure for multiple flash tanks, which can solve the technical problem in the prior art where a large amount of hot water generated during the shutdown and maintenance cleaning of one flash tank also enters the mixing tank, seriously affecting the indicators of other flash tanks in normal production and hindering the control of the next process.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The parallel cleaning pipeline structure of the multi-flash steam bath includes:

[0009] Flash tanks, multiple flash tanks are provided, and the inlet of the flash tanks is used to connect to the output end of the reactor;

[0010] The aforementioned mixing tank is used for mixing materials;

[0011] The connection assembly is provided in multiple sets, each corresponding to one of the aforementioned flash tanks. Each set of the connection assembly includes a discharge pipe and a drain pipe. The outlet of the flash tank can be selectively connected to the mixing tank through the discharge pipe or to the water collection tank through the drain pipe. The water collection tank is used to hold hot water.

[0012] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of multiple flash tanks, the connection assembly further includes an output pipe, the input end of which is connected to the outlet of the flash tank, and the output end of which is connected to the input end of the discharge pipe.

[0013] As a preferred technical solution of the above-mentioned parallel cleaning pipeline structure of multiple flash tanks, a discharge valve, a material pump and a regulating valve are installed sequentially on the output pipeline along the flow direction of the material. The discharge valve is used to switch the on / off state of the output pipeline, the material pump is used to drive the material or hot water in the flash tank to be discharged along the output pipeline, and the regulating valve is used to regulate the flow rate of the output pipeline.

[0014] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of multiple flash tanks, the flash tanks are provided with multiple outlets, and the output pipelines are provided in a one-to-one correspondence with the outlets of the flash tanks.

[0015] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of the multi-flash evaporator, the discharge pipeline is provided with a first feeding valve, which is used to switch the on / off state of the discharge pipeline.

[0016] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of multiple flash tanks, the above-mentioned connection assembly also includes a circulation pipeline, and the above-mentioned output pipeline can be connected to the circulation inlet of the above-mentioned flash tank through the circulation pipeline.

[0017] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of multiple flash evaporators, the above-mentioned circulation pipeline is equipped with a second feeding valve, and the above-mentioned drainage pipeline is equipped with a third feeding valve.

[0018] As a preferred technical solution of the above-mentioned parallel cleaning pipeline structure of multiple flash tanks, the drainage pipeline includes a first input end and a second input end. The first input end is connected to the outlet of the flash tank, the second input end is used to connect to a water source, a hot water delivery valve is installed at the second input end, and a third feed valve is installed at the first input end.

[0019] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of multiple flash evaporators, a temperature sensor is also installed on the output pipeline to detect the temperature of the material.

[0020] As a preferred technical solution for the above-mentioned parallel cleaning pipeline structure of multiple flash tanks, each of the above-mentioned flash tanks is equipped with a pressure sensor to detect the pressure value inside the flash tank.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a multi-flash tank parallel cleaning pipeline structure, including flash tanks, mixing tanks, and connecting assemblies. Multiple flash tanks are provided, with their inlets connected to the output end of a reaction vessel. The mixing tank is used to mix materials. Multiple sets of connecting assemblies are provided, each corresponding to one of the flash tanks. Each set of connecting assemblies includes a discharge pipe and a drain pipe. The outlet of each flash tank can selectively connect to the mixing tank via the discharge pipe or to a water collection tank via the drain pipe. The water collection tank is used to hold hot water.

[0023] Specifically, during normal operation, the inlet of the flash tank is connected to the output end of the reactor to receive the material discharged from the reactor and to cool and depressurize it. The material then exits the flash tank and enters the mixing tank through a discharge pipe for mixing. When the flash tank needs cleaning, hot water is injected into it. For example, hot water is used. After exiting the flash tank, the hot water is discharged into a collection tank through a drain pipe and can be reused. In this embodiment, multiple flash tanks are provided, and these multiple flash tanks are relatively independent, connected in parallel between the reactor and the mixing tank, and each is connected to a collection tank. In this way, the materials in the multiple flash tanks can be collected and mixed in the mixing tank. When some of the flash tanks need cleaning, the others can continue operating, and the hot water discharged from the cleaning flash tanks can be discharged into the collection tank to prevent mixing with the materials in the mixing tank. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the parallel cleaning pipeline structure of the multi-flash tank provided in this embodiment of the solution;

[0026] Figure 2This is a schematic diagram of the connection between a flash tank and the connecting assembly in the multi-flash tank parallel cleaning pipeline structure provided in this embodiment.

[0027] In the picture:

[0028] 10. Flash evaporator; 11. Inlet; 12. Outlet; 13. Circulating feed inlet;

[0029] 20. Mixing tank;

[0030] 31. Discharge pipe; 311. First feed valve; 32. Drainage pipe; 321. Hot water transfer valve; 322. First pipe; 323. Second pipe; 324. Third feed valve; 33. Output pipe; 331. Discharge valve; 332. Material pump; 333. Regulating valve; 34. Circulation pipe; 341. Second feed valve;

[0031] 40. Water collection tank. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figure 1 and Figure 2 As shown, this utility model provides a multi-flash tank parallel cleaning pipeline structure, including flash tanks 10, mixing tanks 20, and connecting assemblies. Multiple flash tanks 10 are provided, with their inlets 11 connected to the output end of the reactor. The mixing tanks 20 are used to mix materials. Multiple sets of connecting assemblies are provided, each corresponding to one of the flash tanks 10. Each set of connecting assemblies includes a discharge pipe 31 and a drain pipe 32. The outlet 12 of the flash tank 10 can selectively connect to the mixing tank 20 via the discharge pipe 31 or to a water collection tank 40 via the drain pipe 32. The water collection tank 40 is used to hold hot water.

[0037] Specifically, during normal operation, the inlet 11 of the flash tank 10 is connected to the output end of the reactor to receive the material discharged from the reactor and to cool and depressurize the material. The material is then discharged from the flash tank 10 and enters the mixing tank 20 through the discharge pipe 31 for mixing. When the flash tank 10 needs cleaning, hot water is injected into it. The hot water is discharged from the flash tank 10 and drained into the collection tank 40 through the drain pipe 32 for reuse. In this embodiment, multiple flash tanks 10 are provided, and these multiple flash tanks 10 are relatively independent, connected in parallel between the reactor and the mixing tank 20, and each is connected to the collection tank 40. Thus, the material in the multiple flash tanks 10 can be collected and mixed in the mixing tank 20. When some of the flash tanks 10 need cleaning, the other flash tanks 10 can continue operating, and the hot water discharged from the cleaning flash tanks 10 can be discharged into the collection tank 40 to prevent mixing with the material in the mixing tank 20.

[0038] It should be noted that the reuse of hot water is not limited to cleaning the flash tank 10.

[0039] In other embodiments, hot water may be replaced with other cleaning liquids.

[0040] Preferably, the flash evaporator 10 is provided with three sets. Optionally, the connection assembly also includes an output pipe 33, the input end of which is connected to the outlet 12 of the flash evaporator 10, and the output end of which is connected to the input end of the discharge pipe 31.

[0041] With this setup, when the pipe between the flash tank 10 and the mixing tank 20 becomes blocked, the output pipe 33 and the discharge pipe 31 can be inspected and repaired in sections, making replacement easier.

[0042] Furthermore, in this embodiment, the drain pipe 32 is connected to the flash tank 10 via the output pipe 33. Thus, when cleaning the flash tank 10, the hot water discharged from the flash tank 10 can sequentially pass through the output pipe 33 and the drain pipe 32 before entering the water collection tank 40. The hot water also cleans the output pipe 33, reducing the risk of blockage.

[0043] Optionally, along the material flow direction, the output pipe 33 is sequentially equipped with a discharge valve 331, a material pump 332, and a regulating valve 333. The discharge valve 331 is used to switch the on / off state of the output pipe 33, the material pump 332 is used to drive the material or hot water in the flash tank 10 to be discharged along the output pipe 33, and the regulating valve 333 is used to regulate the flow rate of the output pipe 33. This configuration allows for relatively precise control of the output of the output pipe 33.

[0044] Optionally, the flash tank 10 has multiple outlets 12, and multiple output pipes 33 are provided corresponding to the outlets 12 of the flash tank 10.

[0045] Thus, during operation, several outlets 12 can be opened as needed to increase the discharge rate of material or hot water in the flash tank 10. Alternatively, some outlets 12 and output pipes 33 can be designed as redundancy. That is, among the multiple outlets 12, there are regular outlets and backup outlets. The output pipe 33 connected to the regular outlet is the regular output pipe, and the output pipe 33 connected to the backup outlet is the backup output pipe. Under normal operation, the backup outlet and backup output pipe are normally closed, while the regular outlet and its connected regular output pipe are open. When some of the regular outlets and / or regular output pipes fail, the corresponding number of backup outlets and backup pipes are activated. This ensures continuous operation of the flash tank 10.

[0046] Optionally, the discharge pipe 31 is equipped with a first feed valve 311, which is used to switch the on / off state of the discharge pipe 31. For example, when cleaning the flash tank 10, the first feed valve 311 is closed, blocking the connection between the mixing tank 20 and the flash tank 10, so that the hot water discharged from the flash tank 10 flows into the water collection tank 40 along the drain pipe 32.

[0047] Optionally, the connection assembly also includes a circulation pipe 34, through which the output pipe 33 can be connected to the circulation inlet 13 of the flash tank 10.

[0048] With this configuration, the material or hot water discharged from the flash tank 10 can be returned to the flash tank 10 through the circulation pipe 34, allowing the flash tank 10 to perform multiple depressurization and cooling treatments on the same batch of material, and to repeatedly clean the flash tank 10 using the same stream of hot water.

[0049] Optionally, a second feed valve 341 is installed on the circulation pipe 34, and a third feed valve 324 is installed on the drainage pipe 32.

[0050] With this setup, when the flash tank 10 finishes cleaning, the second feed valve 341 closes and the third feed valve 324 opens, allowing hot water to be discharged into the water collection tank 40 through the drain pipe 32. If it is necessary to repeatedly rinse the flash tank 10, the second feed valve 341 is opened and the third feed valve 324 is closed, allowing hot water to flow back into the flash tank 10 through the circulation pipe 34.

[0051] Optionally, a temperature sensor is also installed on the output pipe 33 to detect the temperature of the material.

[0052] When the temperature value obtained by the temperature sensor is greater than the preset temperature value, it is determined that the cooling treatment of the material in the flash tank 10 is not up to standard. Then, the first feed valve 311 is closed to block the connection between the flash tank 10 and the mixing tank 20, the third feed valve 324 is closed to block the connection between the flash tank 10 and the water collection tank 40, and the second feed valve 341 is opened so that the material can flow back to the flash tank 10 along the circulation pipe 34 for cooling treatment again until the temperature obtained by the temperature sensor is less than or equal to the preset temperature value. Then, the second feed valve 341 is closed and the first feed valve 311 is opened so that the material can enter the mixing tank 20 through the discharge pipe 31.

[0053] Optionally, each flash tank 10 is equipped with a pressure sensor to detect the pressure value inside the flash tank 10.

[0054] When the pressure value obtained by the pressure sensor is greater than the preset pressure value, it is determined that the depressurization treatment of the material in the flash tank 10 is not up to standard. Then, the first feed valve 311 is closed to block the connection between the flash tank 10 and the mixing tank 20, the third feed valve 324 is closed to block the connection between the flash tank 10 and the water collection tank 40, and the second feed valve 341 is opened so that the material can flow back to the flash tank 10 along the circulation pipe 34 for another cooling treatment until the pressure obtained by the pressure sensor is less than or equal to the preset pressure value. Then, the second feed valve 341 is closed and the first feed valve 311 is opened so that the material can enter the mixing tank 20 through the discharge pipe 31.

[0055] Optionally, the drainage pipe 32 includes a first input end and a second input end. The first input end is connected to the outlet 12 of the flash evaporator 10, and the second input end is used to connect to a water source. A hot water delivery valve 321 is installed at the second input end, and a third feed valve 324 is installed at the first input end. When the flash evaporator 10 is in normal operation and the water collection tank 40 needs to be filled with hot water, the hot water delivery valve 321 is opened to connect the water source and the water collection tank 40, and the third feed valve 324 is closed, allowing the water source to supply water to the water collection tank 40. When the flash evaporator 10 is being cleaned, the hot water delivery valve 321 is closed, and the third feed valve 324 is opened, allowing hot water to flow from the flash evaporator 10 into the water collection tank 40.

[0056] Furthermore, the drainage pipe 32 includes a first pipe 322 and a second pipe 323. The input end of the first pipe 322 is the first input end of the drainage pipe 32, which is connected to the outlet 12 of the flash tank 10 through a portion of the circulation pipe 34. The output end of the first pipe 322 is connected to the middle of the second pipe 323, and the input end of the second pipe 323 is the second input end of the drainage pipe 32, used for connecting to a water source. The output end of the second pipe 323 is the output end of the drainage pipe 32, which is connected to the water collection tank 40. A hot water delivery valve 321 is installed between the output end of the first pipe 322 and the water source, and a third feed valve 324 is installed on the first pipe 322.

[0057] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A multi-flash evaporator parallel cleaning pipeline structure, characterized in that, include: Flash tank (10), multiple flash tanks (10) are provided, and the inlet (11) of the flash tank (10) is used to connect to the output end of the reactor; A mixing tank (20) for mixing materials; The connection assembly is provided in multiple sets corresponding to the multiple flash tanks (10). Each set of the connection assembly includes a discharge pipe (31) and a drain pipe (32). The outlet (12) of the flash tank (10) can be selectively connected to the mixing tank (20) through the discharge pipe (31) or to the water collection tank (40) through the drain pipe (32). The water collection tank (40) is used to hold hot water.

2. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 1, characterized in that, The connection assembly also includes an output pipe (33), the input end of which is connected to the outlet (12) of the flash tank (10), and the output end of which is connected to the input end of the discharge pipe (31).

3. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 2, characterized in that, Along the flow direction of the material, the output pipe (33) is sequentially equipped with a discharge valve (331), a material pump (332), and a regulating valve (333). The discharge valve (331) is used to switch the on / off state of the output pipe (33). The material pump (332) is used to drive the material or hot water in the flash tank (10) to be discharged along the output pipe (33). The regulating valve (333) is used to regulate the flow rate of the output pipe (33).

4. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 2 or 3, characterized in that, The flash tank (10) has multiple outlets (12), and the output pipes (33) are arranged in multiple ways corresponding to the outlets (12) of the flash tank (10).

5. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 4, characterized in that, The discharge pipe (31) is equipped with a first feeding valve (311), which is used to switch the on / off state of the discharge pipe (31).

6. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 2, characterized in that, The connection assembly also includes a circulation pipe (34), and the output pipe (33) can be connected to the circulation inlet (13) of the flash tank (10) through the circulation pipe (34).

7. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 6, characterized in that, The circulation pipe (34) is equipped with a second feed valve (341), and the drainage pipe (32) is equipped with a third feed valve (324).

8. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 7, characterized in that, The drainage pipe (32) includes a first input end and a second input end. The first input end is connected to the outlet (12) of the flash tank (10). The second input end is used to connect to a water source. A hot water delivery valve (321) is installed at the second input end. The third feed valve (324) is installed at the first input end.

9. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 6, characterized in that, A temperature sensor is also provided on the output pipe (33) to detect the temperature of the material.

10. The parallel cleaning pipeline structure of the multi-flash evaporator according to claim 6, characterized in that, Each of the flash tanks (10) is equipped with a pressure sensor to detect the pressure value inside the flash tank (10).

Images