Solid-liquid separation device for high-concentration excrement and urine water

Abstract

The utility model discloses a solid-liquid separation device for high-concentration excrement and urine water. The solid-liquid separation device comprises a dosing mechanism, a flocculation mechanism and a filtering and separating mechanism which are sequentially arranged from top to bottom, the flocculation mechanism comprises a flocculation tank and a stirring assembly arranged in the flocculation tank; the dosing mechanism is used for feeding a flocculating agent into the flocculation tank; the filtering and separating mechanism comprises a separating tank, a filtering cylinder is arranged in the middle of the separating tank, filtering gaps are formed in the side wall of the filtering cylinder through annular screening strips, a sludge discharging opening is formed in the lower portion of the filtering cylinder, and the sludge discharging opening is connected with a sludge suction pump; an annular cavity formed between the filter cartridge and the outer wall of the separation tank is a separation liquid bin, a liquid outlet is formed in the bottom of the separation liquid bin, and the liquid outlet is communicated with a water-liquid suction pump. The solid-liquid separation device is higher in structural integration degree, convenient to automatically control and operate, and capable of effectively improving the solid-liquid separation effect of high-concentration excrement and urine water, relieving the pressure for subsequent sewage treatment and reducing the treatment cost.

Description

Technical Field

[0001] This utility model relates to the field of fecal and urine water treatment technology, specifically to a solid-liquid separation device for high-concentration fecal and urine water. Background Technology

[0002] Public toilets in suburban areas without sewage pipe networks, such as suburban parks, forest parks, and scenic areas, as well as toilets built as part of rural toilet renovation projects and toilets at railway checkpoints, generate high-concentration fecal wastewater. This wastewater is characterized by extremely high concentrations of chemical oxygen demand (COD), biochemical oxygen demand (BOD), and ammonia nitrogen (NH3-N), therefore it cannot be directly discharged and requires harmless treatment. An important step in the treatment process is solid-liquid separation, after which the wastewater and solid residue are further treated separately.

[0003] Existing solid-liquid separation technologies generally use filter bags or filter screens to directly filter the sewage. Due to the influence of filter screen density, particulate matter in the liquid during the separation process can clog the filter bags or filter screens, requiring continuous backwashing and even periodic chemical cleaning. This increases the number of steps and the cost of sewage solid-liquid separation treatment. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a solid-liquid separation device for high-concentration fecal and urine water, which can sequentially perform chemical dosing flocculation and filtration separation on high-concentration fecal and urine water, effectively improving the efficiency of solid-liquid separation, reducing the pressure on subsequent sewage treatment, and lowering treatment costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A solid-liquid separation device for high-concentration fecal and urine wastewater is designed, comprising a dosing mechanism, a flocculation mechanism, and a filtration separation mechanism arranged sequentially from top to bottom; the flocculation mechanism includes a flocculation tank, a stirring assembly disposed inside the flocculation tank, and a wastewater inlet disposed at the top of the flocculation tank; the dosing mechanism is used to deliver flocculant into the flocculation tank;

[0007] The filtration and separation mechanism includes a separation tank, a filter cylinder in the middle of the separation tank, filter gaps formed by annular screen bars on the side wall of the filter cylinder, a sludge discharge port at the bottom of the filter cylinder, and a sludge suction pump connected to the sludge discharge port; the annular cavity formed between the filter cylinder and the outer wall of the separation tank is a separation liquid chamber, a drain port at the bottom of the separation liquid chamber, and a water suction pump connected to the drain port; the feed inlet of the separation tank is located at the top of the filter cylinder and is connected to the discharge port of the flocculation tank.

[0008] In the above technical solution, a sewage lift pump is used to send the sewage to be treated into a flocculation tank through the inlet. A dosing mechanism delivers flocculant into the flocculation tank, and a stirring mechanism inside the flocculation tank thoroughly agitates the sewage. The fecal mixture undergoes thorough physical flocculation in the flocculation tank, forcing most of the suspended solids and water-soluble organic matter to be flocculated. The resulting flocculent sludge is suspended in the liquid under the action of agitation. The flocculated mixture then enters the filter cartridge of a separation tank. The flocculated sludge settles to the bottom of the separation tank under gravity, while the liquid flows through the filter gaps in the filter cartridge into the separation liquid chamber. After sedimentation and filtration, the liquid and sludge are separated. The liquid in the separation liquid chamber is pumped out through the drain port by a liquid suction pump and transported to the next treatment process for further treatment (such as electrocatalytic treatment). After the liquid is pumped out, a sludge suction pump removes the sludge settled at the bottom of the filter cartridge and sends it to a sludge collection point for subsequent treatment.

[0009] Preferably, the sidewall of the filter cylinder is formed by annular screen bars to create filter gaps; the cross-sectional shape of the screen bars is V-shaped, wedge-shaped, or semi-circular, and the protruding parts of the screen bars face the inside of the filter cylinder. The filter cylinder uses screen bars to form filter gaps, which is less prone to clogging. After the flocculated mixture enters the filter cylinder, the water flows through the filter gaps into the separation chamber, while the flocculent sludge remains in the filter cylinder, achieving both sedimentation and filtration.

[0010] Preferably, the filter cylinder is cylindrical, and a conical hopper may be provided at the bottom of the cylindrical filter cylinder to facilitate the sedimentation of flocculated sludge; or the filter cylinder is a cone with a gradually decreasing diameter, and the cone shape of the filter cylinder can further improve the filtration efficiency.

[0011] Preferably, the filter gap of the filter cylinder is less than 1 mm. The fecal mixture after physical flocculation forms flocculent sludge with a certain viscosity, and the particles of the flocculent sludge are larger than 1-1.2 mm. Therefore, setting the filter gap to less than 1 mm can fully separate the flocculated sludge and water, resulting in better solid-liquid separation.

[0012] Preferably, the dosing mechanism includes a dosing hopper and a screw feeder disposed at the lower part of the dosing hopper, the outlet of which is connected to the flocculation tank. The dosing hopper contains flocculant, which is fed into the flocculation tank by the screw feeder.

[0013] Preferably, the stirring assembly includes a stirring shaft, stirring blades mounted on the stirring shaft, and a stirring motor mounted on the upper part of the flocculation tank, with the output end of the stirring motor connected to the stirring shaft. The stirring motor may be a variable speed motor.

[0014] Preferably, two drain ports are symmetrically arranged on both sides of the bottom of the separation liquid tank, and the two drain ports are connected to the inlet of the water suction pump through drain pipes. The two drain ports can accelerate the discharge of water.

[0015] Preferably, a discharge valve is provided at the discharge port of the flocculation tank; a sludge discharge valve is provided at the sludge discharge port; both the discharge valve and the sludge discharge valve are electric ball valves.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention, by incorporating a top-down dosing mechanism, flocculation mechanism, and filtration separation mechanism, first flocculates the fecal and urine wastewater to be treated, causing the particulate matter in the mixture to form flocculated sludge. Then, sedimentation and filtration occur, with filter gaps formed by annular screen bars, allowing the flocculated particles to remain within the filter cartridge, thus achieving a better filtration and separation effect. This invention features a higher degree of equipment integration, facilitating automated control and operation. It effectively improves the solid-liquid separation effect of high-concentration fecal and urine wastewater, resulting in lower impurity and particulate matter content in the separated wastewater. This effectively simplifies subsequent wastewater treatment processes, reduces pressure on subsequent wastewater treatment, and lowers treatment costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a front view of the present invention;

[0020] Figure 3 This is a side view of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the separation tank;

[0022] Figure 5 This is a schematic diagram of another structure of the filter cartridge;

[0023] Figure 6 for Figure 5 A schematic diagram of the cross-section of the A-type screen bar.

[0024] The following are labeled in the diagram: 1 Flocculation tank, 2 Separation tank, 3 Filter cylinder, 4 Sludge inlet, 5 Sludge suction pump; 6 Separation liquid tank, 7 Drain outlet, 8 Water suction pump; 9 Dosing hopper, 10 Screw feeder, 11 Agitator motor, 12 Discharge valve, 13 Sludge discharge valve, 14 Sludge discharge port; 15 Screen bar. Detailed Implementation

[0025] The specific embodiments of this utility model will be described below with reference to the accompanying drawings and examples. However, the following examples are only used to illustrate the implementation of this utility model in detail and do not limit the scope of this utility model in any way.

[0026] Example 1: A solid-liquid separation device for high-concentration fecal and urine wastewater, see [link to example]. Figures 1-4 The system includes a dosing mechanism, a flocculation mechanism, and a filtration and separation mechanism, arranged sequentially from top to bottom. The flocculation mechanism includes a flocculation tank 1, a stirring assembly inside the flocculation tank 1, and a sludge inlet 4 at the top of the flocculation tank 1. The stirring assembly includes a stirring shaft and stirring blades mounted on the stirring shaft. A stirring motor 11 is mounted on the upper part of the flocculation tank 1, and the output end of the stirring motor 11 is connected to the stirring shaft. The stirring motor 11 can be a variable speed motor.

[0027] The dosing mechanism is used to feed flocculant into the flocculation tank 1; the dosing mechanism includes a dosing hopper 9 and a screw feeder 10 located at the bottom of the dosing hopper 9, the outlet of the screw feeder 10 being connected to the flocculation tank.

[0028] The filtration and separation mechanism includes a separation tank 2, a filter cylinder 3 in the middle of the separation tank 2, and a filter gap formed by annular screen bars 15 on the side wall of the filter cylinder 3. A sludge discharge port 14 is provided below the filter cylinder 3, and the sludge discharge port 14 is connected to a sludge suction pump 5. The annular cavity formed between the filter cylinder 3 and the outer wall of the separation tank 2 is a separation liquid chamber 6. A drain port 7 is provided at the bottom of the separation liquid chamber 6, and the drain port 7 is connected to a water suction pump 8. The feed inlet of the separation tank 2 is located at the top of the filter cylinder 3 and is connected to the discharge port of the flocculation tank 1.

[0029] A discharge valve 12 is installed at the discharge port of the flocculation tank 1; a sludge discharge valve 13 is installed at the sludge discharge port 14; both the discharge valve 12 and the sludge discharge valve 13 are electric ball valves.

[0030] In this embodiment, the filter cylinder 3 is a vertically arranged cylindrical shape, and the screen bars 15 forming the filter gaps are V-shaped or wedge-shaped, with the protruding part of the screen bars 15 facing the inside of the filter cylinder, and the filter gaps formed between the screen bars 15 are less than 1 mm.

[0031] The fecal mixture after physical flocculation forms flocculent sludge with a certain viscosity. The particles of the flocculent sludge are larger than 1-1.2 mm. Therefore, by setting the filter gap to less than 1 mm, the flocculated sludge and water can be fully separated. More than 99% of the flocculent sludge can be separated, resulting in a significant separation effect and high efficiency. The filter cartridge is not easily clogged during the separation process, and continuous online operation can be achieved.

[0032] Furthermore, two drain ports 7 are symmetrically arranged on both sides of the bottom of the separation liquid tank 6, and the two drain ports 7 are respectively connected to the inlet of the water suction pump 8 through drain pipes.

[0033] Example 2: A solid-liquid separation device for high-concentration fecal urine water, which differs from Example 1 in that, see [link to example 1]. Figure 5 , Figure 6 The filter cylinder 3 is a conical cylinder with a diameter that gradually decreases from top to bottom. The sieve bars 15 of the filter cylinder 3 are wedge-shaped, and the diameter of the sieve bars 15 also gradually decreases from top to bottom. The filtration gap is also less than 1 mm. This structure helps to improve the efficiency of sedimentation and filtration.

[0034] Example 3: A solid-liquid separation device for high-concentration fecal and urine water, which differs from Example 1 in that the cross-sectional shape of the screen bar 15 of the filter cylinder 3 is semi-circular. The semi-circular cross-sectional shape makes it less likely for flocculent matter to adhere to the inner wall of the filter cylinder 3, further reducing clogging.

[0035] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components.

[0036] The specific working method of this utility model's solid-liquid separation device for high-concentration fecal and urine wastewater is as follows: The wastewater to be treated is fed into a flocculation tank via a sewage lift pump. A screw feeder delivers flocculant from the dosing hopper into the flocculation tank. Simultaneously, a stirring motor drives the stirring assembly to agitate the wastewater in the flocculation tank, ensuring thorough flocculation of the fecal mixture. The flocculated mixture then enters the filter cylinder of the separation tank. The filtrate passes through the filter gaps in the filter cylinder into the separation liquid chamber. A water suction pump is activated to extract the separated water and send it to the next wastewater treatment process for further processing. After the water is completely extracted, the sludge discharge valve is opened, and a sludge suction pump extracts the separated flocculated sludge, sending it to a sludge collection point for further processing. This completes the solid-liquid separation of the high-concentration fecal and urine wastewater.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings and examples. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, changes or modifications can be made without departing from the spirit of the present invention.

Claims

1. A solid-liquid separation device for high-concentration fecal and urine water, characterized by comprising: The device comprises, from top to bottom, a dosing mechanism, a flocculation mechanism and a filtration and separation mechanism. The filtration and separation mechanism comprises a separation tank, a filter cylinder is arranged in the middle of the separation tank, filter slots are formed on the sidewall of the filter cylinder by annular screen strips, a sludge discharge outlet is arranged below the filter cylinder, and a sludge suction pump is connected to the sludge discharge outlet; an annular cavity formed between the filter cylinder and the outer wall of the separation tank is a separation liquid bin, a liquid discharge outlet is arranged at the bottom of the separation liquid bin, and a water suction pump is connected to the liquid discharge outlet; the feed inlet of the separation tank is located at the top of the filter cylinder and is in communication with the discharge outlet of the flocculation tank.

2. The high concentration fecal and urine water solid-liquid separation device according to claim 1, characterized by, The filter slots are formed on the sidewall of the filter cylinder by annular screen strips; the cross-sectional shape of the screen strips is V-shaped, wedge-shaped or semicircular, and the protruding part of the screen strips faces the inside of the filter cylinder.

3. The high concentration fecal and urine water solid-liquid separation device according to claim 2, characterized by, The filter cylinder is cylindrical or tapered in diameter.

4. The high concentration fecal and urine water solid-liquid separation device according to claim 2 or 3, characterized by, The filter slots of the filter cylinder are less than 1 mm.

5. The high concentration fecal and urine water solid-liquid separation device according to claim 1, characterized by, The dosing mechanism comprises a dosing hopper and a screw feeder arranged at the lower part of the dosing hopper, and the discharge outlet of the screw feeder is in communication with the flocculation tank.

6. The high concentration fecal and urine water solid-liquid separation device according to claim 1, characterized by, The stirring assembly comprises a stirring shaft and stirring blades arranged on the stirring shaft, a stirring motor is arranged at the upper part of the flocculation tank, and the output end of the stirring motor is connected to the stirring shaft.

7. The high concentration fecal and urine water solid-liquid separation device according to claim 1, characterized by, Two liquid discharge outlets are symmetrically arranged at the bottom of the separation liquid bin, and the two liquid discharge outlets are respectively in communication with the liquid inlets of the water suction pump through liquid discharge pipes.

8. The high concentration fecal and urine water solid-liquid separation device according to claim 1, characterized by, A discharge valve is arranged at the discharge outlet of the flocculation tank, and a sludge discharge valve is arranged at the sludge discharge outlet; both the discharge valve and the sludge discharge valve are electric ball valves.

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