Low-energy-consumption mother liquor circulating cooling device based on seed precipitation slurry waste heat recovery

Abstract

The utility model relates to the technical field of cooling devices, and provides a low-energy-consumption mother liquor circulation cooling device based on seed precipitation slurry waste heat recovery. An outlet of the seed precipitation slurry tank is communicated with an inlet of the circulating pump; the heat exchanger is provided with a first inlet, a second inlet and a first outlet, the first inlet is communicated with an outlet of the circulating pump, and the first outlet is communicated with an inlet of the seed precipitation slurry tank; the seed precipitation mother liquor tank is communicated with the second inlet, and the first inlet, the first outlet and the seed precipitation mother liquor tank are sequentially communicated. By means of the technical scheme, the technical problem that in the prior art, a large amount of heat needs to be discharged in a seed precipitation slurry cooling mode, and resources are wasted is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of cooling device technology, and more specifically, to a low-energy-consumption mother liquor circulation cooling device based on waste heat recovery from seed slurry. Background Technology

[0002] The seed slurry is mainly a mixture containing sodium aluminate solution and aluminum hydroxide seed crystals. Cooling causes the sodium aluminate solution to decompose on the seed crystal surface, precipitating aluminum hydroxide – a crucial step in aluminum hydroxide production. Currently, forced circulation cooling is commonly used for seed slurries. This involves installing a circulation pump within the slurry to circulate it between the decomposition tank and an external cooler. The cooler is typically a shell-and-tube or plate heat exchanger, with a cooling medium (chilled water or cooling water) flowing on the other side. The heat from the seed slurry is transferred to the cooling medium through the heat exchanger walls, achieving rapid cooling. However, this cooling method requires the production system to dissipate a significant amount of heat during the cooling process, resulting in resource waste. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a low-energy mother liquor circulation cooling device based on waste heat recovery of seed slurry, which solves the technical problem that the seed slurry cooling method in the prior art needs to discharge a large amount of heat, resulting in waste of resources.

[0004] According to one aspect, at least one embodiment of this disclosure provides a low-energy-consumption mother liquor circulating cooling device based on waste heat recovery from seed slurry, comprising:

[0005] Slurry tank;

[0006] A circulating pump, wherein the outlet of the slurry tank is connected to the inlet of the circulating pump;

[0007] The heat exchanger has a first inlet, a second inlet, a first outlet, and a second outlet. The first inlet leads to the outlet of the circulating pump, the first outlet leads to the inlet of the slurry tank, and the second outlet is used for discharging material.

[0008] A seed mother liquor tank, which leads to the second inlet.

[0009] For example, the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry provided in at least one embodiment of this disclosure further includes:

[0010] The evaporator unit, and the second outlet are connected to the evaporator unit in sequence.

[0011] For example, the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry provided in at least one embodiment of this disclosure further includes:

[0012] The pipeline has one end connected to the seed mother liquor tank and the other end connected to the second inlet, and the seed mother liquor tank is connected to the second inlet through the pipeline.

[0013] For example, in at least one embodiment of the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry provided in this disclosure, the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry further includes:

[0014] A first pump body is installed on the pipeline, and the first pump body is used to pump the seed mother liquor into the pipeline.

[0015] For example, in at least one embodiment of the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry provided in this disclosure, the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry further includes:

[0016] A second pump body is installed on the pipeline, and the first pump body and the second pump body are arranged sequentially along the direction of conveying the mother liquor.

[0017] For example, in at least one embodiment of the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry provided in this disclosure, the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry further includes:

[0018] A filter element has a filter inlet and a filter outlet, the filter inlet being connected to the pipe, the outlet being connected to the second inlet, and the pipe being connected to the second inlet of the heat exchanger through the filter element;

[0019] A sieve is disposed within the filter element, and the sieve is used to filter the mother liquor.

[0020] For example, in at least one embodiment of the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery from seed slurry provided in this disclosure, the screen has two parts, and the filter element includes:

[0021] A filter housing, wherein the top of the filter housing has a slide rail;

[0022] A partition is disposed inside the filter housing, the partition dividing the filter housing into a first filter chamber and a second filter chamber arranged horizontally, both the first filter chamber and the second filter chamber leading to the filter outlet, and the two screens being located above the first filter chamber and the second filter chamber respectively;

[0023] A slider is slidably disposed on the slide rail, and the filter inlet is located on the slider. After the slider slides, it drives the filter inlet to communicate with the first filter chamber and the second filter chamber respectively. The top of the partition plate abuts against the slider.

[0024] For example, in the low-energy-consumption mother liquor circulating cooling device based on waste heat recovery of seed slurry provided in at least one embodiment of this disclosure, the filter element further includes:

[0025] Two guide plates are respectively disposed in the first filter cavity and the second filter cavity, and the two guide plates and the partition plate respectively form the first filter cavity and the second filter cavity.

[0026] For example, in the low-energy mother liquor circulation cooling device based on waste heat recovery of seed slurry provided in at least one embodiment of this disclosure, there are two screens, both of which are movably disposed on the filter housing and are respectively located above the first filter chamber and the second filter chamber. The filter housing has two replacement ports, which are respectively connected to the first filter chamber and the second filter chamber. After the screen slides, it is used to move into or out of the replacement port.

[0027] For example, in the low-energy mother liquor circulation cooling device based on waste heat recovery of seed slurry provided in at least one embodiment of this disclosure, a sewage discharge chamber is formed between the guide plate and the filter shell, the guide plate has a brush, the brush is located in the sewage discharge chamber, and the brush is used to brush the screen after it has moved.

[0028] The beneficial effects of the embodiments disclosed herein are as follows:

[0029] In this disclosure, a circulating pump is started, and the seed slurry in the seed slurry tank flows out of its outlet and into the inlet of the circulating pump. After being pressurized by the circulating pump, it is transported from its outlet to the first inlet of the heat exchanger. The seed mother liquor tank stores the seed mother liquor, which is transported from the seed mother liquor tank to the second inlet of the heat exchanger. The seed slurry exchanges heat with the seed mother liquor in the heat exchanger, and the heat-exchanged seed slurry flows out from the first outlet and returns to the inlet of the seed slurry tank, completing one cycle. After absorbing heat from the seed slurry in the heat exchanger, the seed mother liquor continues the subsequent process.

[0030] By utilizing the waste heat of the seed slurry to heat the seed mother liquor, waste heat recovery is achieved, reducing energy waste and lowering overall energy consumption. A circulating pump ensures continuous heat exchange by circulating the seed slurry, improving heat exchange efficiency and thus reducing the energy consumption for cooling the mother liquor. This heat exchange cooling of the seed slurry not only achieves the required mother liquor temperature but also raises the mother liquor temperature, reducing subsequent steam usage. Using the mother liquor instead of cooling water conservancy saves water resources and reduces water waste. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0032] Figure 1 This is a schematic diagram of a low-energy mother liquor circulating cooling device based on waste heat recovery of seed slurry in one embodiment of the present disclosure.

[0033] Figure 2 for Figure 1 A cross-sectional schematic diagram of the filter element of the low-energy mother liquor circulation cooling device based on waste heat recovery of the slurry in the embodiment.

[0034] In the diagram: 1. Seeding slurry tank; 2. Circulating pump; 3. Heat exchanger; 31. First inlet; 32. Second inlet; 33. First outlet; 4. Seeding mother liquor tank; 34. Second outlet; 5. Evaporator unit; 6. Pipeline; 7. First pump body; 8. Second pump body; 9. Filter element; 91. Filter inlet; 92. Filter outlet; 10. Screen; 93. Filter housing; 931. Slide rail; 94. Baffle plate; 95. First filter chamber; 96. Second filter chamber; 11. Sliding block; 12. Guide plate; 97. Replacement port; 98. Drainage chamber; 121. Brush. Detailed Implementation

[0035] The present disclosure 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 disclosure and are not intended to limit the scope of the disclosure.

[0036] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0037] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0038] In this disclosure, unless otherwise expressly 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.

[0039] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0040] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] like Figure 1 As shown, it illustrates a low-energy-consumption mother liquor circulation cooling device based on waste heat recovery of seed slurry in one embodiment of the present disclosure, including a seed slurry tank 1; the outlet of the seed slurry tank 1 is connected to the inlet of the circulation pump 2; the heat exchanger 3 has a first inlet 31, a second inlet 32, a first outlet 33 and a second outlet 34, the first inlet 31 leads to the outlet of the circulation pump 2, the first outlet 33 leads to the inlet of the seed slurry tank 1; the seed mother liquor tank 4 leads to the second inlet 32, the first inlet 31, the first outlet 33 and the seed mother liquor tank 4 are connected in sequence, and the second outlet 34 is used for discharging material.

[0042] For example, such as Figure 1 As shown, the seed slurry tank 1 is used to store the seed slurry. When the circulation pump 2 is started, the seed slurry in the seed slurry tank 1 flows out from its outlet and into the inlet of the circulation pump 2. After being pressurized by the circulation pump 2, it is transported from its outlet to the first inlet 31 of the heat exchanger 3. The seed mother liquor tank 4 stores the seed mother liquor, which is transported from the seed mother liquor tank 4 to the second inlet 32 ​​of the heat exchanger 3. The seed slurry exchanges heat with the seed mother liquor in the heat exchanger 3. After the heat exchange, the seed slurry flows out from the first outlet 33 and returns to the inlet of the seed slurry tank 1, completing one cycle. The seed mother liquor absorbs heat from the seed slurry in the heat exchanger 3 and continues the subsequent process.

[0043] By utilizing the waste heat of the seed slurry to heat the seed mother liquor, waste heat recovery is achieved, reducing energy waste and lowering overall energy consumption. The seed slurry is circulated via circulating pump 2, ensuring continuous heat exchange, improving heat exchange efficiency, and thus reducing the energy consumption for cooling the mother liquor.

[0044] In some examples, the second outlet 34 leads to the evaporator unit 5 in sequence.

[0045] For example, such as Figure 1 As shown, the seed mother liquor enters the second inlet 32 ​​of the heat exchanger 3 from the seed mother liquor tank 4. After absorbing heat from the seed slurry in the heat exchanger 3, it flows out from the second outlet 34 and is then transported to the evaporator unit 5. In the evaporator unit 5, the seed mother liquor that has absorbed heat can perform evaporation operations more efficiently, thereby improving evaporation efficiency.

[0046] After being heated by waste heat recovery, the seed mother liquor enters evaporator unit 5, reducing the additional energy requirement of evaporator unit 5 and further lowering the overall system energy consumption. This also improves the operating efficiency of evaporator unit 5, as the preheated seed mother liquor shortens the evaporation time and increases production efficiency.

[0047] In some examples, one end of pipe 6 is connected to seed mother liquor tank 4, and the other end is connected to second inlet 32. Seed mother liquor tank 4 is connected to second inlet 32 ​​through pipe 6.

[0048] For example, such as Figure 1 As shown, one end of the pipe 6 is connected to the seed mother liquor tank 4, and the other end is connected to the second inlet 32 ​​of the heat exchanger 3. The seed mother liquor in the seed mother liquor tank 4 is transported to the second inlet 32 ​​of the heat exchanger 3 through the pipe 6, thereby realizing the transportation of the seed mother liquor.

[0049] Pipeline 6 provides a stable channel for the transport of seed mother liquor, ensuring that the seed mother liquor can be smoothly transported from seed mother liquor tank 4 to heat exchanger 3, thus ensuring the normal operation of the entire system.

[0050] In some examples, a first pump body 7 is provided on the pipe 6, and the first pump body 7 is used to pump the seed mother liquor into the pipe 6.

[0051] For example, such as Figure 1 As shown, a first pump body 7 is installed on the pipe 6. When the first pump body 7 is started, it generates suction to draw the seed mother liquor in the seed mother liquor tank 4 into the pipe 6 and provides power to make the seed mother liquor flow in the pipe 6, and finally deliver it to the second inlet 32 ​​of the heat exchanger 3.

[0052] The first pump body 7 provides power for the transport of the seed mother liquor, ensuring that the seed mother liquor can overcome the resistance of the pipeline 6 and be smoothly transported from the seed mother liquor tank 4 to the heat exchanger 3, thereby improving the transport efficiency of the seed mother liquor. The transport speed and pressure of the seed mother liquor can be controlled by adjusting the flow rate and head of the first pump body 7 to meet the needs of different operating conditions.

[0053] In some examples, the second pump body 8 is mounted on the pipe 6, and the first pump body 7 and the second pump body 8 are arranged sequentially along the direction of delivery of the mother liquor.

[0054] For example, such as Figure 1 As shown, a first pump body 7 and a second pump body 8 are installed sequentially on the pipeline 6, arranged along the direction of seed mother liquor delivery. When the first pump body 7 and the second pump body 8 are started, the first pump body 7 first draws the seed mother liquor from the seed mother liquor tank 4 into the pipeline 6, and then the second pump body 8 further pressurizes the seed mother liquor, so that the seed mother liquor is delivered to the second inlet 32 ​​of the heat exchanger 3 more quickly and stably.

[0055] The dual-pump configuration increases the power for transporting the seed mother liquor, overcoming longer pipeline distances and greater resistance, and ensuring stable transport of the seed mother liquor in long-distance or complex pipeline systems. Even if one pump fails, the other can still maintain a certain transport capacity, improving the system's reliability and stability.

[0056] In some examples, filter element 9 has a filter inlet 91 and a filter outlet 92, filter inlet 91 is connected to pipe 6, and the outlet is connected to a second inlet 32. Pipe 6 is connected to the second inlet 32 ​​of heat exchanger 3 through filter element 9. Screen 10 is disposed inside filter element 9 and is used to filter mother liquor.

[0057] For example, such as Figure 2 As shown, the filter inlet 91 of the filter element 9 is connected to the pipe 6, and the filter outlet 92 is connected to the second inlet 32 ​​of the heat exchanger 3. The seed mother liquor enters the filter inlet 91 of the filter element 9 from the pipe 6. Inside the filter element 9, the screen 10 filters the seed mother liquor to remove impurities. The filtered seed mother liquor flows out from the filter outlet 92 and enters the second inlet 32 ​​of the heat exchanger 3.

[0058] The screen 10 effectively filters impurities in the seed mother liquor, preventing them from entering the heat exchanger 3 and avoiding blockage or damage, thus extending its service life. It also improves the purity of the seed mother liquor entering the heat exchanger 3, ensuring effective heat exchange and increasing system operating efficiency.

[0059] In some examples, there are two screens 10, and the top of the filter housing 93 has a slide rail 931. A partition 94 is disposed inside the filter element 9, dividing the filter housing 93 into a first filter chamber 95 and a second filter chamber 96 arranged laterally. Both the first filter chamber 95 and the second filter chamber 96 are connected to the filter outlet 92. A slider 11 is slidably disposed on the slide rail 931, and a filter inlet 91 is located on the slider 11. After the slider 11 slides, it drives the filter inlet 91 to connect with the first filter chamber 95 and the second filter chamber 96 respectively. The longitudinal section of the slider 11 is I-shaped, and the slider 11 has an annular groove around its perimeter. The slider 11 is engaged with the slide rail 931 of the filter housing 93 through the annular groove, and the length of the slider 11 along its sliding direction is more than twice the length of the slide rail 931. The slider 11 keeps the slide rail 931 sealed during the sliding process. Both the inner wall of the filter housing 93 and the partition 94 have overlapping platforms. The screen 10 overlaps on the overlapping platforms, and the overlapping platform surface is lower than the contact surface between the partition 94 and the slider 11.

[0060] For example, such as Figure 2 As shown, the filter housing 93 of the filter element 9 has a slide rail 931 at its top, and the slider 11 can slide on the slide rail 931. The filter inlet 91 is located on the slider 11. The partition 94 divides the filter housing 93 into a first filter chamber 95 and a second filter chamber 96 arranged horizontally, and both the first filter chamber 95 and the second filter chamber 96 are connected to the filter outlet 92. When the slider 11 slides on the slide rail 931, it drives the filter inlet 91 to connect with the first filter chamber 95 and the second filter chamber 96 respectively. For example, when the screen 10 in the first filter chamber 95 needs to be cleaned or replaced, the slider 11 is slid to connect the filter inlet 91 with the second filter chamber 96, and the mother liquor enters the second filter chamber 96 for filtration. At the same time, the screen 10 in the first filter chamber 95 can be operated.

[0061] This system enables continuous filtration. When the screen 10 in one filter chamber needs cleaning or replacement, the entire filtration process does not need to be stopped; simply switch to another filter chamber for filtration. This improves system operating efficiency, extends the system maintenance cycle, reduces downtime caused by cleaning or replacing the screen 10, and enhances production continuity and stability.

[0062] In some examples, there are two guide plates 12, which are respectively disposed in the first filter cavity 95 and the second filter cavity 96, and the two guide plates 12 and the partition plate 94 respectively form the first filter cavity 95 and the second filter cavity 96.

[0063] For example, such as Figure 2As shown, guide plates 12 are respectively installed in the first filter chamber 95 and the second filter chamber 96. The guide plates 12 are inclinedly installed in the filter housing 93, with the lower end of the guide plate 12 close to the filter outlet 92. The upper end surfaces of the two guide plates 12 and the partition plate 94 respectively form the first filter chamber 95 and the second filter chamber 96. After the mother liquor enters the corresponding first filter chamber 95 and second filter chamber 96 from the filter inlet 91, it enters the heat exchanger 3 through the filter outlet 92 under the guidance of the guide plates 12 for heat exchange.

[0064] The guide plate 12 prevents the seed mother liquor from remaining inside the filter housing 93, thus reducing the residence time of the seed mother liquor in the first filter chamber 95 and the second filter chamber 96.

[0065] In some examples, there are two screens 10, both of which are movably disposed on the filter housing 93 and are located above the first filter chamber 95 and the second filter chamber 96, respectively. The filter housing 93 has two replacement ports 97, which are connected to the first filter chamber 95 and the second filter chamber 96, respectively. After the screen 10 slides, it is used to move into or out of the replacement ports 97.

[0066] For example, such as Figure 2 As shown, when the screen 10 needs to be replaced, slide the screen 10 along the filter housing 93 to remove it from the replacement port 97; when installing a new screen 10, move the screen 10 from the replacement port 97 into the corresponding filter chamber. The replacement port 97 facilitates the replacement and cleaning of the screen 10. Operators can operate the screen 10 directly through the replacement port 97 without disassembling the entire filter element 9, reducing maintenance difficulty and cost.

[0067] In some examples, a drain chamber 98 is formed between the guide plate 12 and the filter housing 93. The guide plate 12 has a brush 121 located inside the drain chamber 98. The brush 121 is used to scrub the screen 10 after it has moved.

[0068] For example, such as Figure 2 As shown, a drain chamber 98 is formed between the lower end face of the guide plate 12 and the filter housing 93, and the brush 121 on the guide plate 12 is located inside the drain chamber 98. The screen 10 can be moved out of the replacement port 97 first. When installing the screen 10, the screen 10 is tilted into the replacement port 97 and into the drain chamber 98. The friction between the screen 10 and the brush 121 is controlled to clean the screen 10. After cleaning, the screen 10 is moved out of the replacement port 97 and horizontally back into the replacement port 97 to complete the installation of the screen 10. The brush 121 can clean impurities on the screen 10, and the brushed-off impurities enter the drain chamber 98 for easy collection and treatment.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A low-energy consumption mother liquor circulating cooling device based on seed slurry waste heat recovery, characterized in that, Comprise: A kind of slurry tank (1); Recycle pump (2), the outlet of the slurry tank (1) is led to the inlet of the recycle pump (2); Heat exchanger (3) has first inlet (31), second inlet (32), first outlet (33) and second outlet (34), the first inlet (31) is led to the outlet of the recycle pump (2), the first outlet (33) is led to the inlet of the slurry tank (1), the second outlet (34) is used for discharging; A kind of slurry tank (4), the slurry tank (4) is used to be led to the second inlet (32).

2. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 1, characterized in that, Further comprise: Evaporation unit (5), the second outlet (34) is led to the evaporation unit (5).

3. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 1, characterized in that, Further comprise: Pipeline (6), one end is communicated the slurry tank (4), the other end is communicated the second inlet (32), the slurry tank (4) is led to the second inlet (32) by the pipeline (6).

4. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 3, characterized in that, The low-energy-consumption mother liquor circulating cooling device based on seed slurry waste heat recovery further comprises: First pump body (7) is arranged on the pipeline (6), and the first pump body (7) is used to extract seed slurry mother liquor into the pipeline (6).

5. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 4, characterized in that, The low-energy-consumption mother liquor circulating cooling device based on seed slurry waste heat recovery further comprises: Second pump body (8) is arranged on the pipeline (6), and the first pump body (7) and the second pump body (8) are sequentially arranged along the seed slurry mother liquor conveying direction.

6. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 3, characterized in that, The low-energy-consumption mother liquor circulating cooling device based on seed slurry waste heat recovery further comprises: Filtering member (9) has filtering inlet (91) and filtering outlet (92), the filtering inlet (91) is communicated with the pipeline (6), the outlet is communicated with the second inlet (32), the pipeline (6) is communicated with the second inlet (32) of the heat exchanger (3) by the filtering member (9); Screen (10) is arranged in the filtering member (9), and the screen (10) is used to filter the seed slurry mother liquor.

7. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 6, characterized in that, The screen (10) has two, and the filtering member (9) comprises: Filtering shell (93), the filtering shell (93) top has slide (931); Partition (94) is arranged in the filtering shell (93), and the partition (94) divides the filtering shell (93) into first filter cavity (95) and second filter cavity (96) arranged transversely, the first filter cavity (95) and the second filter cavity (96) are both communicated with the filtering outlet (92), and two screens (10) are located above the first filter cavity (95) and the second filter cavity (96) respectively; Slide block (11) is slidably arranged on the slide (931), the filtering inlet (91) is located on the slide block (11), and the slide block (11) is used to drive the filtering inlet (91) to be communicated with the first filter cavity (95) and the second filter cavity (96) respectively after sliding, and the top end of the partition (94) is abutted with the slide block (11).

8. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 7, characterized in that, The filtering member (9) further comprises: The guide plate (12) has two, which are arranged in the first filter cavity (95) and the second filter cavity (96) respectively, and the two guide plates (12) and the partition plate (94) form the first filter cavity (95) and the second filter cavity (96) respectively. 9.The low-energy consumption mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 7, characterized in that, The screen (10) has two, which are movably arranged on the filter shell (93) and are located above the first filter cavity (95) and the second filter cavity (96) respectively, the filter shell (93) has two replacement openings (97), the replacement openings (97) are communicated with the first filter cavity (95) and the second filter cavity (96) respectively, and the screen (10) is used to move into or out of the replacement opening (97) after sliding.

10. The low-energy mother liquor circulating cooling device based on seed slurry waste heat recovery according to claim 8, characterized in that, The guide plate (12) and the filter shell (93) form a blowdown chamber (98), the guide plate (12) is provided with a brush (121), the brush (121) is located in the blowdown chamber (98), and the brush (121) is used for brushing the screen (10) after movement.

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