A type of sink cabinet

Abstract

This invention discloses a water tank cabinet, belonging to the technical field of laboratory equipment. The water tank cabinet includes a water tank and a cabinet body, with the water tank mounted above the cabinet body. A sedimentation device is installed inside the cabinet body, with an inlet and an outlet. The outlet of the water tank is connected to the inlet, wherein the residence time of the liquid in the sedimentation device is not less than the settling time of the solids. This invention achieves solid-liquid separation by adding a sedimentation device to a traditional water tank cabinet; simultaneously, because the volume of the sedimentation device is much larger than that of a commonly used U-bend, it avoids the problem of frequent pipe blockage.

Description

Technical Field

[0001] This invention belongs to the field of laboratory equipment technology, and in particular relates to a water tank cabinet. Background Technology

[0002] Laboratory sink cabinets are a relatively mature technology and are widely used in laboratories across various industries. They are used for draining laboratory waste, cleaning containers, and handling liquid-related operations. Most laboratory sink cabinets currently have an S-bend at the bottom. The S-bend holds water to prevent odors from the sewer. Simultaneously, the S-bend intercepts some solids, protecting the drainage pipes from blockage.

[0003] However, for powder industry laboratories, two problems arise when using conventional water tank cabinets: 1) The liquid poured into the water tank in the powder industry contains a large amount of dust, and the S-bend can only hold a small amount of powder, resulting in frequent blockage of the S-bend and a high cleaning frequency; 2) The ability to intercept powder in the liquid is limited, resulting in a large amount of powder entering the drain pipe, thereby blocking the drain pipe and making the subsequent treatment work cumbersome.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] This invention proposes a sink cabinet that can replace the existing S-bend to intercept and collect powder contained in the sink outlet water, and can effectively reduce the risk of solid blockage of the sewer.

[0006] The technical solution of the present invention is as follows:

[0007] A sink cabinet includes a sink and a cabinet body, wherein the sink is mounted on top of the cabinet body;

[0008] The cabinet is equipped with a sedimentation device, which has an inlet and an outlet. The outlet of the water tank is connected to the inlet. The residence time of the liquid in the sedimentation device is not less than the settling time of the solids.

[0009] The water tank can be made of stainless steel, PP, or other materials. The cabinet can be made of stainless steel, PP, or powder-coated carbon steel, or other materials. The cabinet countertop can be made of ceramic, epoxy resin board, or other materials. The sedimentation device can be made of stainless steel, PP, or other materials. The liquid inlet and outlet, as well as their connected inlet and outlet pipes, can be made of stainless steel, PP, flexible hoses, or other materials.

[0010] The working principle of this invention is as follows: When liquid containing particulate matter flows into the sedimentation device through the water tank, the liquid level in the sedimentation device continuously rises. When the liquid level reaches the height of the drain outlet, the liquid flows out of the sedimentation device and is discharged. During the liquid rise, the particulate matter, due to its higher specific gravity, settles to the bottom of the sedimentation device and continuously accumulates. When a certain amount of sediment is reached, the sedimentation device can be removed for cleaning. By adding the sedimentation device, and based on the principle that the residence time of the liquid in the sedimentation device is not less than the settling time of the solids, this invention can be understood as having a specific design for the inlet, outlet, shape, or volume of the sedimentation device. For example, the volume of the sedimentation device can be much larger than that of a commonly used water trap, thereby effectively achieving solid-liquid separation of liquids containing powder particles and avoiding the problem of frequent pipe blockage.

[0011] Preferably, to ensure that particles can settle within the time it takes for the liquid to flow through the sedimentation device, i.e., the residence time of the water in the sedimentation device is not less than the particle settling time, the volume of the sedimentation device satisfies Equation 1:

[0012]

[0013] Wherein, V is the volume of the sedimentation device; Q is the maximum liquid flow rate at the inlet; h is the height of the sedimentation device; and v is the settling velocity of the sediment particles.

[0014] The cross-section of the sedimentation device can be circular, rectangular, or other shapes, with a circular shape being preferred to facilitate sediment removal.

[0015] Preferably, the cross-sectional radius r of the sedimentation device satisfies Equation 2:

[0016]

[0017] Where Q is the maximum liquid flow rate at the inlet; v is the settling velocity of the precipitated particles; and π is pi. To ensure ease of periodic cleaning, the value of r should not be too large.

[0018] Preferably, to ensure the sedimentation effect, the precipitated particles in the liquid must have sufficient sedimentation time. In the sedimentation device, the sedimentation rate v of the precipitated particles satisfies Equation 3:

[0019]

[0020] Where d is the diameter of the solid; ρ s ρ is the density of the solid; g is the gravitational acceleration; μ is the adhesion coefficient of the liquid.

[0021] Since the liquid entering the precipitation device carries a certain amount of kinetic energy, this kinetic energy will form a vortex in the precipitation device, and the particulate matter carried by the liquid will move in the precipitation device along with the vortex, thus possibly entering the liquid discharge port without going through the precipitation process. To solve this problem, the present invention improves it by adjusting the position of the water inlet pipe of the precipitation device. That is, the height of the lower end of the liquid inlet of the precipitation device is lower than the height of the liquid discharge port of the precipitation device. The inertia of the fluid itself in the precipitation device will reduce the kinetic energy of the incoming liquid, thereby reducing the situation where the particles in the liquid enter the liquid discharge port without precipitation.

[0022] Preferably, the height of the liquid inlet of the precipitation device from the bottom of the precipitation device is h1, and the height of the liquid discharge port of the precipitation device from the bottom of the precipitation device is h2, where h1 < h2; preferably h1 ≤ h2 / 2.

[0023] Furthermore, to solve the vortex problem in the precipitation device, the present invention also provides a technical solution, that is, the precipitation device includes n nested precipitation chambers, where n is a natural number greater than or equal to 2, and the innermost precipitation chamber is the first-level precipitation chamber, and the outermost precipitation chamber is the n-level precipitation chamber; the liquid inlet is provided in the first-level precipitation chamber, the liquid discharge port is provided on the n-level precipitation chamber, and the residence time of the liquid in the n precipitation chambers is not less than the sedimentation time of the solid matter.

[0024] Preferably, the heights of the precipitation chambers from the inside to the outside in the n precipitation chambers decrease in turn, and overflow ports are provided at the tops of the first-level precipitation chamber to the (n - 1)-level precipitation chamber.

[0025] The liquid containing particulate matter flows into the first-level precipitation chamber via the water tank, and the liquid level continuously rises. During the rising process of the liquid, due to the relatively large specific gravity of the particulate matter, it precipitates to the bottom of the first-level precipitation chamber and continuously accumulates; when the liquid level reaches the height of the top of the first-level precipitation chamber, the liquid flows out of the first-level precipitation chamber and enters the next-level precipitation chamber on the relatively outer side; during the rising process of the liquid, due to the relatively large specific gravity of the particulate matter, it precipitates to the bottom of the next-level precipitation chamber on the relatively outer side and continuously accumulates, achieving the second solid-liquid separation; after multiple precipitations, the liquid flows into the liquid discharge port and is drained away.

[0026] Preferably, the height h of the n-level precipitation chamber n and the height h of the (n - 1)-level precipitation chamber n-1 satisfy Equation 4:

[0027] h n-1 >h n + d1 Equation 4

[0028] Wherein, d1 is the diameter of the drain outlet. This prevents liquid from bypassing the inner sedimentation chamber and directly entering the relatively outer sedimentation chamber.

[0029] Preferably, each sedimentation chamber within the nth stage sedimentation chamber can be disassembled independently, which facilitates subsequent sediment removal.

[0030] Preferably, a positioning device is provided between two adjacent sedimentation chambers.

[0031] Preferably, the positioning device can be an isolation ball disposed between the outer wall of the m-th stage sedimentation chamber and the inner wall of the (m+1)-th stage sedimentation chamber, the diameter of the isolation ball satisfying Equation 5:

[0032] R3≤0.5×(R1-R2) Equation 5

[0033] Where m is a natural number, and 1≤m≤n, R1 is the diameter of the (m+1)th stage sedimentation chamber; R2 is the diameter of the mth stage sedimentation chamber; and R3 is the diameter of the isolation sphere.

[0034] Preferably, the positioning device may also be a magnet disposed on the m-th stage precipitation chamber and / or the (m+1)-th stage precipitation chamber, wherein the m-th stage precipitation chamber and the (m+1)-th stage precipitation chamber are magnetically attracted to each other.

[0035] Maintaining a constant distance between adjacent sedimentation chambers can optimize the secondary sedimentation effect.

[0036] To increase the settling time and improve the settling effect of liquids containing particles, this invention also provides a technical solution: the settling device is a multi-stage settling chamber connected in series, with the drain port of the previous stage settling chamber connected to the inlet of the next stage settling chamber. Liquid containing particles flows into the previous stage settling chamber via the water tank, and the liquid level continuously rises. During the liquid rise, the particles, due to their higher specific gravity, settle to the bottom of the previous stage settling chamber and accumulate. When the liquid level reaches the drain port at the top of the previous stage settling chamber, the liquid flows out of the previous stage settling chamber and into the next stage settling chamber. During the liquid rise, the particles, due to their higher specific gravity, settle to the bottom of the next stage settling chamber and accumulate, achieving a second settling. After multiple settling processes, the liquid flows into the drain port and is discharged.

[0037] Multiple sedimentation processes can greatly increase the sedimentation effect and reduce the particulate matter content in the wastewater.

[0038] When regularly cleaning the sedimentation unit, the sediment, in the form of sludge, is difficult to clean and can easily pollute the surrounding environment. To address this issue, a sediment discharge system is connected to the lower part of the sedimentation unit. This system includes a sludge pump, a filter press, and a filter cake collector. The sludge pump extracts the sediment through a discharge port located at the bottom of the sedimentation unit. The filter press is connected to the sludge pump to pressurize and filter the sediment. The filter cake collector is connected to the filter press to collect the filter cake. By adding a filter press, the sediment is changed from a sludge state to a filter cake state, making the sediment easier to handle.

[0039] Preferably, a moving device is provided below the sedimentation device; more preferably, the moving device is a caster wheel.

[0040] Preferably, the sediment discharge system may further include a weight sensor located at the bottom of the sedimentation device.

[0041] Preferably, the filter cake collector is equipped with a level gauge on top to warn of the need for cleaning.

[0042] Laboratory wastewater enters the sedimentation device via a water tank. Heavier solids settle at the bottom of the device, while the liquid is discharged through the drain port. When the sedimentation device accumulates a certain amount of sediment, a weight sensor activates, opening the valve connecting the sedimentation device to the sludge pump. Simultaneously, the sludge pump starts, pumping the sludge to a filter press for filtration. When the weight in the sedimentation tank falls below a set value, the sludge pump shuts off, the valve closes, and the sedimentation device returns to normal sedimentation. The filter press continuously pressurizes and filters the sludge pumped in. The filtrate returns to the sedimentation device, while the filter cake enters the filter cake collector. When the filter cake collected in the collector reaches a set height, an alarm is triggered to remind staff to clean the collector.

[0043] This invention achieves solid-liquid separation by adding a sedimentation device to a traditional sink cabinet; at the same time, since the sedimentation device has a much larger volume than the commonly used U-bend, it also avoids the problem of frequent pipe blockage. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the water tank cabinet in Embodiment 1 of the present invention;

[0046] Figure 2 This is a schematic diagram of the precipitation device in Embodiment 1 of the present invention;

[0047] Figure 3 This is a schematic diagram of the precipitation device in Embodiment 2 of the present invention;

[0048] Figure 4 This is a schematic diagram of the water tank cabinet in Embodiment 3 of the present invention;

[0049] Figure 5 This is a schematic diagram of the water tank cabinet in Embodiment 4 of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1-Faucet; 2-Water tank; 3-Cabinet; 4-Sedimentation device; 401-Lower end of liquid inlet; 402-Top cover; 403-Fixing component; 404-Drain outlet; 405-Isolation ball; 406-Liquid inlet; 41-Secondary sedimentation chamber; 42-First-stage sedimentation chamber; 43-First-stage sedimentation chamber; 44-Secondary sedimentation chamber; 5-Wheel caster; 6-Liquid inlet pipe; 7-Drain pipe; 8-Sludge discharge port; 9-Electric valve; 10-Weight sensor; 11-Filter press; 12-Filter cake collection hopper; 13-Filter cake collector; 14-Sludge pump. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Example 1

[0054] A type of sink cabinet, such as Figure 1 and 2 As shown, the system includes a water tank 2 and a cabinet 3. A faucet 1 is located above the water tank 2, and the water tank 2 is mounted above the cabinet 3. A sedimentation device 4 is installed inside the cabinet 3. The sedimentation device 4 has an inlet 406 and an outlet 404. The outlet of the water tank 2 is connected to the inlet 406 via an inlet pipe 6, and an outlet pipe 7 is connected downstream of the outlet 404. A cover 402 is located above the sedimentation device 4, and the cover 402 and the inlet 406 are connected by a fastener 403. The residence time of the liquid in the sedimentation device 4 is not less than the settling time of the solids.

[0055] In this embodiment, the faucet 1 can be a stainless steel three-way gooseneck faucet, the sink 2 is made of stainless steel, the cabinet 3 is made of carbon steel with powder coating, the countertop of the cabinet 3 is made of ceramic, and the sedimentation device 4 is made of stainless steel. The inlet pipe 6 and the outlet pipe 7 are flexible hoses.

[0056] In a preferred embodiment of this invention, a movable device is provided below the sedimentation device 4 for easy periodic cleaning; the movable device is a stainless steel caster wheel 5.

[0057] Liquid containing particulate matter flows into sedimentation device 4 through water tank 2. The liquid level in sedimentation device 4 continuously rises, and when the liquid level reaches the height of drain port 404, the liquid flows out of sedimentation device 4 and is discharged. During the liquid rise, the particulate matter, due to its higher specific gravity, settles to the bottom of sedimentation device 4 and continuously accumulates. When a certain amount of sediment is reached, sedimentation device 4 can be removed for cleaning. By adding sedimentation device 4, solid-liquid separation is achieved; at the same time, because the volume of sedimentation device 4 is much larger than that of commonly used U-bends, the problem of frequent pipe blockage is avoided.

[0058] To ensure that particles settle within the time it takes for the liquid to flow through the sedimentation device 4, i.e., the residence time of the water in the sedimentation device 4 is not less than the particle settling time, the volume of the sedimentation device 4 must satisfy Equation 1:

[0059]

[0060] Wherein, V is the volume of the sedimentation device; Q is the maximum liquid flow rate at the inlet; h is the height of the sedimentation device; and v is the settling velocity of the sediment particles.

[0061] The cross-section of the sedimentation device 4 can be circular, rectangular, or other shapes; in this embodiment, it is circular to facilitate the removal of sediment. The cross-sectional radius r of the sedimentation device 4 satisfies Equation 2:

[0062]

[0063] Where Q is the maximum liquid flow rate at the inlet; v is the settling velocity of the precipitated particles; and π is pi. To ensure ease of periodic cleaning, the value of r should not be too large.

[0064] To ensure effective sedimentation, sufficient sedimentation time must be provided for the precipitated particles in the liquid. In sedimentation device 4, the sedimentation rate v of the precipitated particles satisfies equation 3:

[0065]

[0066] Where d is the diameter of the solid; ρ s ρ is the density of the solid; g is the gravitational acceleration; μ is the adhesion coefficient of the liquid.

[0067] Since the liquid entering the precipitation device 4 carries a certain amount of kinetic energy, this kinetic energy will form a vortex in the precipitation device 4, and the particulate matter carried by the liquid will move in the precipitation device 4 along with the vortex, so that it may enter the drain port 404 without going through the precipitation process. In this embodiment, improvement is made by adjusting the position of the water inlet pipe of the precipitation device 4 for precipitation. That is, the height of the lower end 401 of the liquid inlet of the precipitation device 4 is lower than the height of the drain port 404 of the precipitation device 4. The inertia possessed by the fluid itself in the precipitation device 4 will reduce the kinetic energy of the incoming liquid, thereby reducing the situation that the particles in the liquid enter the drain port without precipitation.

[0068] In the preferred embodiment of this embodiment, the height of the lower end 401 of the liquid inlet of the precipitation device 4 from the bottom of the precipitation device is h1, and the height of the drain port 404 of the precipitation device 4 from the bottom of the precipitation device 4 is h2, where h1 < h2; preferably h1 ≤ h2 / 2.

[0069] Embodiment 2

[0070] To solve the vortex problem in the precipitation device, this embodiment provides a sink cabinet different from Embodiment 1. Please refer to Figure 3 , the difference between this embodiment and Embodiment 1 is that the precipitation device 4 includes n nested precipitation chambers, where n is a natural number greater than or equal to 2, and the innermost precipitation chamber is the first-stage precipitation chamber, and the outermost precipitation chamber is the nth-stage precipitation chamber; the liquid inlet is provided in the first-stage precipitation chamber, the drain port is provided on the nth-stage precipitation chamber, and the residence time of the liquid in the n precipitation chambers is not less than the sedimentation time of the solid matter.

[0071] The heights of the precipitation chambers from the inside to the outside in the n precipitation chambers decrease in sequence, and overflow ports are provided at the tops of the first-stage precipitation chamber to the (n - 1)th-stage precipitation chamber.

[0072] The liquid containing particulate matter flows into the first-stage precipitation chamber via the water tank, and the liquid level continuously rises. During the rising process of the liquid, due to the relatively large specific gravity, the particulate matter precipitates to the bottom of the first-stage precipitation chamber and continuously accumulates; when the liquid level reaches the height of the top of the first-stage precipitation chamber, the liquid flows out of the first-stage precipitation chamber and enters the next-stage precipitation chamber on the relatively outer side; during the rising process of the liquid, due to the relatively large specific gravity, the particulate matter precipitates to the bottom of the relatively outer next-stage precipitation chamber and continuously accumulates, realizing the second solid-liquid separation; after multiple precipitations, the liquid flows into the drain port and is drained away.

[0073] In the preferred embodiment, the height h n of the nth-stage precipitation chamber and the height h n-1 of the (n - 1)th-stage precipitation chamber satisfy Equation 4:

[0074] hn-1 >h n +d1 Equation 4

[0075] Wherein, d1 is the diameter of the drain outlet. This prevents liquid from bypassing the inner sedimentation chamber and directly entering the next-level sedimentation chamber on the outer side.

[0076] In a preferred embodiment, each sedimentation chamber within the nth stage sedimentation chamber can be disassembled independently, which facilitates subsequent sediment removal.

[0077] In a preferred embodiment, a positioning device is provided between two adjacent sedimentation chambers.

[0078] In one embodiment, the positioning device may be an isolation ball disposed between the outer wall of the m-th stage sedimentation chamber and the inner wall of the (m+1)-th stage sedimentation chamber, wherein the diameter of the isolation ball satisfies Equation 5:

[0079] R3≤0.5×(R1-R2) Equation 5

[0080] Where m is a natural number, and 1≤m≤n, R1 is the diameter of the (m+1)th stage sedimentation chamber; R2 is the diameter of the mth stage sedimentation chamber; and R3 is the diameter of the isolation sphere.

[0081] In other embodiments, the positioning device may also be a magnet disposed on the m-th stage precipitation chamber and / or the (m+1)-th stage precipitation chamber, wherein the m-th stage precipitation chamber and the (m+1)-th stage precipitation chamber are magnetically attracted to each other.

[0082] In this embodiment, there are two stages of precipitation chambers, namely the first stage precipitation chamber 42 and the second stage precipitation chamber 41, as follows: Figure 3 As shown, liquid containing particulate matter flows into the first-stage sedimentation chamber 42 through the inlet 406 and the lower end of the inlet 401 of the water tank 2. As the liquid level rises, the particulate matter, due to its higher specific gravity, settles to the bottom of the first-stage sedimentation chamber 42 and accumulates. When the liquid level reaches the top of the first-stage sedimentation chamber 42, the liquid flows out of the first-stage sedimentation chamber 42 and enters the second-stage sedimentation chamber 41. As the liquid rises, the particulate matter, due to its higher specific gravity, settles to the bottom of the second-stage sedimentation chamber 41 and accumulates, achieving a second solid-liquid separation. After two sedimentation processes, the liquid flows into the drain 404 and is discharged.

[0083] In this embodiment, a plurality of isolation balls 405 are provided between the outer wall of the first-stage sedimentation chamber 42 and the inner wall of the second-stage sedimentation chamber 41 to keep the distance between the first-stage sedimentation chamber 42 and the second-stage sedimentation chamber 41 constant, which can optimize the secondary sedimentation effect.

[0084] Example 3

[0085] To increase the settling time and improve the settling effect of liquids containing particles, this embodiment provides a water tank cabinet different from that in Embodiment 1. Please refer to... Figure 4 The difference between this embodiment and embodiment 1 is that the cabinet 3 is provided with a series of multi-stage sedimentation chambers. The drain port of the upper sedimentation chamber is connected to the inlet of the lower sedimentation chamber, and the inlet of the upper sedimentation chamber is connected to the outlet of the water tank 2.

[0086] In this embodiment, the cabinet 3 is equipped with a primary sedimentation chamber 43 and a secondary sedimentation chamber 44 connected in series, such as... Figure 4 As shown, liquid containing particulate matter flows into the primary sedimentation chamber 43 via water tank 2. As the liquid level rises, the particulate matter, due to its higher density, settles to the bottom of the primary sedimentation chamber 43 and accumulates. When the liquid level reaches the drain port at the top of the primary sedimentation chamber 43, the liquid flows out of the primary sedimentation chamber 43 and into the secondary sedimentation chamber 44. During the liquid's rise, the particulate matter, due to its higher density, settles to the bottom of the secondary sedimentation chamber 44 and accumulates, achieving a second sedimentation. This process is repeated multiple times until the liquid is discharged. Multiple sedimentation stages significantly increase the sedimentation effect and reduce the particulate matter content in the wastewater.

[0087] Example 4

[0088] When regularly cleaning the sedimentation device, the sediment, in the form of sludge, is difficult to clean and can easily pollute the surrounding environment. To solve this problem, this embodiment provides a water tank cabinet different from Embodiment 1. Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that a sediment discharge system is also connected to the lower part of the sedimentation device 4. The sediment discharge system includes a sludge pump 14, a filter press 11, and a filter cake collector 13. The sludge pump 14 is connected to the sludge discharge port 8 at the lower part of the sedimentation device 4 via an electric valve 9. The filter press 11 is connected to the sludge pump 14 to pressurize and filter the sediment. The filter cake collector 13 is connected to the filter press 11 via a filter cake collection hopper 12 to collect the filter cake. By adding the filter press 11, the sediment is changed from a slurry state to a filter cake state, making the sediment easier to process.

[0089] In this embodiment, the sediment discharge system further includes a weight sensor 10 located at the bottom of the sedimentation device 4.

[0090] Laboratory wastewater enters sedimentation device 4 via water tank 2. Heavier solids settle at the bottom of sedimentation device 4, while the liquid is discharged through drain port 404. When the sediment collected in sedimentation device 4 reaches a certain amount, weight sensor 10 senses this and opens the electric valve 9 connecting sedimentation device 4 to sludge pump 14. Simultaneously, sludge pump 14 starts, pumping sludge to filter press 11 for filtration. When the weight in the sedimentation tank falls below a set value, sludge pump 14 shuts off, electric valve 9 closes, and sedimentation device 4 returns to normal sedimentation. Filter press 11 continuously pressurizes and filters the sludge pumped in by sludge pump 14. The filtrate can be returned to sedimentation device 4, while the filter cake enters filter cake collector 13 through filter cake collection hopper 12. When the filter cake collected in filter cake collector 13 reaches a set height, an alarm is triggered to remind staff to clean filter cake collector 13.

[0091] In a preferred embodiment, casters may be provided below the sedimentation device 4, and a level gauge may be provided on the top of the filter cake collector 13 to warn of the need to clean the filter cake collector 13.

[0092] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A water tank cabinet for use in the powder industry, comprising a water tank and a cabinet body, wherein the water tank is mounted on top of the cabinet body; Its features are, The cabinet is equipped with a sedimentation device, which has an inlet and an outlet. The outlet of the water tank is connected to the inlet through an inlet pipe, which is a flexible hose. The residence time of the liquid in the sedimentation device is not less than the settling time of the solids. The height of the lower end of the liquid inlet of the sedimentation device from the bottom of the sedimentation device is h1, and the height of the liquid outlet of the sedimentation device from the bottom of the sedimentation device is h2, where h1 <h2; The sedimentation device includes n nested sedimentation chambers, where n is a natural number greater than or equal to 2, and the innermost sedimentation chamber is the first-level sedimentation chamber, and the outermost sedimentation chamber is the nth-level sedimentation chamber; the liquid inlet is located in the first-level sedimentation chamber, the liquid outlet is located in the nth-level sedimentation chamber, and the residence time of the liquid in the nth-level sedimentation chamber is not less than the settling time of the solids; The height of each sedimentation chamber in the n-stage sedimentation chamber decreases sequentially from the inside to the outside, and an overflow port is provided at the top of each sedimentation chamber from the first stage to the (n-1)th stage. The sedimentation device is also connected to a sediment discharge system, which further includes a weight sensor located at the bottom of the sedimentation device. The height h of the nth stage precipitation chamber n The height h of the (n-1)th stage precipitation chamber n-1 Satisfying Equation 4: h n-1 >h n +d1 formula 4 Wherein, d1 is the diameter of the drain outlet; A positioning device is provided between two adjacent sedimentation chambers. The positioning device is an isolation ball disposed between the outer wall of the m-th sedimentation chamber and the inner wall of the (m+1)-th sedimentation chamber. The diameter of the isolation ball satisfies Equation 5: R3≤0.5×(R1-R2)Equation 5 Where m is a natural number, and 1≤m≤n, and R1 is the diameter of the (m+1)th stage precipitation chamber; R2 is the diameter of the m-th stage precipitation chamber; R3 is the diameter of the isolation sphere.

2. The sink cabinet according to claim 1, characterized in that, The volume of the precipitation device satisfies Equation 1: ≥ Formula 1 Wherein, V is the volume of the sedimentation device; Q is the maximum liquid flow rate at the inlet; h is the height of the sedimentation device; v is the settling velocity of the sediment particles.

3. The sink cabinet according to claim 1, characterized in that, The cross-section of the sedimentation device is circular, and the cross-sectional radius r of the sedimentation device satisfies Equation 2: r≥ Formula 2 Where Q is the maximum liquid flow rate of the inlet; v is the settling velocity of the precipitated particles; π is pi.

4. The sink cabinet according to claim 2 or 3, characterized in that, The settling velocity v of the precipitated particles satisfies Equation 3: Formula 3 Wherein, d is the diameter of the solid; ρ s ρ is the density of the solid; ρ is the density of the liquid; g is the acceleration due to gravity; μ is the adhesion coefficient of the liquid.

5. The sink cabinet according to claim 1, characterized in that, h1≤h2 / 2.

6. The sink cabinet according to claim 1, characterized in that, Each precipitation chamber located within the nth-stage precipitation chamber can be disassembled independently.

7. The sink cabinet according to claim 1, characterized in that, The sedimentation device is a series of multi-stage sedimentation chambers, in which the drain port of the upper sedimentation chamber is connected to the inlet port of the lower sedimentation chamber.

8. The sink cabinet according to claim 1, characterized in that, The sediment discharge system includes: A sludge pump extracts sediment through a sludge discharge port located at the bottom of the sedimentation device; A filter press, connected to the sludge pump, is used to pressurize and filter the precipitate; A filter cake collector, connected to the filter press, is used to collect the filter cake.

9. The sink cabinet according to claim 8, characterized in that, A moving device is provided below the sedimentation device.

10. The sink cabinet according to claim 9, characterized in that, The moving device is a swivel wheel.

11. The sink cabinet according to claim 8, characterized in that, The filter cake collector is equipped with a level gauge on top to warn of the need for cleaning.

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