Continuous water inlet and circulating water outlet efficient precipitation device

Abstract

The invention discloses a continuous water inlet and circulating water outlet efficient precipitation device, and relates to the technical field of water treatment.The continuous water inlet and circulating water outlet efficient precipitation device comprises a tank body, an inner cavity of the tank body is divided into a plurality of precipitation areas, water inlet pipes are arranged in the precipitation areas, and the tops of a plurality of sewage pipes are communicated with the water outlet end of an alternate water supply assembly; the settling zone is divided into a free settling zone, a flocculation settling zone, a layered settling zone and a compression settling zone from top to bottom, and water inlet port parts of a plurality of water inlet pipes are arranged between the layered settling zone and the compression settling zone; according to the invention, the plurality of settling zones and the plurality of water inlet pipes are correspondingly arranged, and the plurality of sewage pipes supply water in sequence by utilizing the adjustment of the alternate water supply assembly, so that the alternate use of each settling zone is realized, and the water inlet operation can be continuously carried out and cannot influence the settling operation; the whole system achieves the effects of continuous water feeding and circulating water discharging while achieving static precipitation.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a continuous water inlet, circulation and outlet high-efficiency sedimentation device. Background Art

[0002] Sedimentation tank is a commonly used equipment in the field of sewage treatment technology. It is mainly based on gravity sedimentation, that is, it uses the fact that the speed at which suspended impurity particles in the water flow settle downward is greater than the upward flow speed of the water flow, or the downward sedimentation time is less than the time it takes for the water to flow out of the sedimentation tank, so that the suspended particles can be separated from the water flow and water purification can be achieved.

[0003] When existing sedimentation tanks achieve a hydraulic surface load of 5m / h, they generally do so through air flotation or by adding fluidized carriers (such as micro-sand or magnetic powder, consumables). This method increases energy consumption and carrier usage; static sedimentation is the best and most reliable method, but it cannot achieve continuous water inflow and outflow; and the existing sedimentation tanks, whose water distribution points are usually located in the buffer zone or free sedimentation zone, cannot fully utilize the sludge's own filtering effect and tap the sedimentation potential. Therefore, the development of an efficient and compact solid-liquid separation device has become an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a continuous water inlet, circulating water outlet and efficient sedimentation device to solve the problems of low surface load, inability to achieve continuous water inlet and continuous water outlet and low treatment efficiency of the existing sedimentation tank treatment technology proposed in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-efficiency sedimentation device with continuous water inlet, circulation and outlet comprises a tank body, wherein a partition plate is fixedly connected to the inner wall of the tank body, wherein the partition plate divides the inner cavity of the tank body into a plurality of sedimentation areas, wherein a water inlet pipe is arranged in each of the plurality of sedimentation areas, an alternating water supply assembly for controlling water flow to different water inlet pipes for alternating water supply is fixedly installed on the top of the inner wall of the tank body, wherein the tops of the plurality of water inlet pipes are connected to the water outlet end of the alternating water supply assembly, wherein the water inlet end of the alternating water supply assembly is fixedly connected to a sewage pipe; a conical mud bucket is fixedly connected to the bottom of the inner wall of the tank body, an air weir is arranged on the top of each of the plurality of sedimentation areas, and a mud discharge pipe is arranged on the bottom of each of the plurality of sedimentation areas.

[0007] As a further solution of the present invention: the sedimentation zone is divided into a free sedimentation zone, a flocculation sedimentation zone, a stratified sedimentation zone, and a compression sedimentation zone from top to bottom according to the principle of suspended matter sedimentation in a static sedimentation state, and the water inlet ports of several water inlet pipes are all arranged between the stratified sedimentation zone and the compression sedimentation zone.

[0008] As a further solution of the present invention: a plurality of inclined concentric circular inclined plates are arranged on the upper part of the flocculation and sedimentation zone.

[0009] As a further solution of the present invention: sludge concentration meters are provided in both the stratified sedimentation zone and the compression sedimentation zone.

[0010] As a further solution of the present invention: the tank body has a height of 8-15m.

[0011] As a further solution of the present invention: the number of the precipitation zones is 2-6.

[0012] As a further solution of the present invention: the working method of the device comprises the following steps:

[0013] Step 1: water is distributed to a sedimentation area through a sewage pipe, and the sewage naturally settles at the bottom of the sedimentation area to form a sludge layer, and the upper clear liquid is discharged along the top air weir;

[0014] Step 2: The mud-water interface is continuously raised with the transportation of sewage. When the mud-water interface reaches the top of the sedimentation area, the water inlet of the water inlet pipe stops for static sedimentation, and the alternating water supply component switches the water inlet pipe, and the water inlet pipe in another sedimentation area is responsible for the water inlet operation;

[0015] Step 3: After a period of static sedimentation, the sludge layer and the supernatant in the sedimentation area are re-stratified, and then continue to wait for the alternating water supply component to switch the water inlet pipe to re-introduce water from the sedimentation area;

[0016] Step 4: Take the work from step 1 to step 3 as one cycle, repeat several cycles, and discharge the sludge by suction through the sludge discharge pipe.

[0017] As a further solution of the present invention: in step 4, the sludge concentration is detected by a sludge concentration meter and linked with the alternating water supply component to adjust the water flow rate of the water inlet pipe and the water inlet switching operation cycle.

[0018] As a further solution of the present invention: during the rising process of sewage in step 2, a vortex effect is formed by the concentric circular inclined plates to achieve secondary solid-liquid separation.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a plurality of sedimentation areas and correspondingly sets a plurality of water inlet pipes, and uses the adjustment of the alternating water supply assembly to make the plurality of sewage pipes supply water in sequence, thereby realizing the alternating use of each sedimentation area, so that the water inlet operation can be carried out continuously and the water inlet operation will not affect the sedimentation operation. The entire system satisfies static sedimentation while realizing continuous water inlet circulation and drainage, and has higher treatment efficiency;

[0020] The water inlet port of the water inlet pipe of the present invention is arranged between the stratified sedimentation zone and the compression sedimentation zone, so as to avoid disturbance of the bottom sludge and make full use of the filtering effect of the sludge to reduce the rising problem of suspended matter in the inlet water; the upper part of the flocculation sedimentation zone of the device is provided with a plurality of inclined concentric circular inclined plates, which form a vortex effect to achieve secondary solid-liquid separation, further increase the inlet load, and strengthen the solid-liquid separation effect, so that the surface load of the device is much higher than that of the traditional sedimentation tank, and there is no need to add micro-sand, magnetic powder and other carriers and sludge circulation to achieve the effect of the high-efficiency sedimentation tank, saving the cost of carrier loss and energy consumption;

[0021] The design of the present invention utilizes the water pressure formed by the height of the tank body itself in conjunction with the tapered mud hopper inclined at the top surface to enhance the compression sedimentation effect, so that the water content of the discharged sludge accumulated on the tapered mud hopper is lower. The steep mud hopper design eliminates the need for mechanical scraping equipment and also makes the sludge more compact. The sludge can be directly transported for dehydration without concentration, which can save the sludge concentration tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front cross-sectional view of the device structure of the present invention;

[0023] Figure 2 It is a bottom cross-sectional view of the device structure of the first embodiment of the present invention;

[0024] Figure 3 It is a bottom cross-sectional view of the device structure of the second embodiment of the present invention.

[0025] In the figure: 1. tank body; 2. partition plate; 3. sedimentation zone; 301. free sedimentation zone; 302. flocculation sedimentation zone; 303. layered sedimentation zone; 304. compression sedimentation zone; 4. alternating water supply assembly; 5. water inlet pipe; 6. conical mud bucket; 7. mud discharge pipe; 8. concentric circle inclined plate; 9. sludge concentration meter; 10. air weir; 11. outlet pipe; 12. sewage pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] For example, see Figure 1 In an embodiment of the present invention, a continuous water inlet, circulating water outlet and efficient sedimentation device comprises a tank body 1, which is designed as a vertical cylindrical body, so as to highly integrate the coagulation sedimentation and water outlet systems and reduce the equipment footprint;

[0028] See also Figure 2 The inner wall of the tank body 1 is fixedly connected with a partition plate 2, which divides the inner cavity of the tank body 1 into two sedimentation areas 3. Figure 1 , water inlet pipes 5 are provided in the two sedimentation areas 3, and an alternating water supply component 4 for controlling the water flow to different water inlet pipes 5 for alternating water supply is fixedly installed on the top of the inner wall of the tank body 1. The alternating water supply component 4 can be implemented by existing technical means, such as an intermediate water distribution bucket, which is used to control the alternating water inflow of the two water inlet pipes 5. The tops of the two water inlet pipes 5 are connected to the water outlet end of the intermediate water distribution bucket, and the water inlet end of the alternating water supply component 4 is fixedly connected with a sewage pipe 12; the present application sets up a plurality of sedimentation areas 3 and correspondingly sets a plurality of water inlet pipes 5, and uses the adjustment of the alternating water supply component 4 to make the two water inlet pipes 5 supply water in turn, thereby realizing the alternating use of the two sedimentation areas 3, so that the water inflow operation can be carried out continuously and the water inflow operation will not affect the sedimentation operation. The whole system satisfies the static sedimentation while achieving the effect of continuous water inflow, circulation and drainage.

[0029] The bottom of the inner wall of the tank body 1 is fixedly connected with a conical mud hopper 6, and the inclination angle of the conical mud hopper 6 is greater than or equal to 55 degrees. The water pressure formed by the height of the tank body 1 is used in conjunction with the conical mud hopper 6 inclined on the top surface to enhance the compression sedimentation effect, so that the water content of the discharged sludge accumulated on the conical mud hopper 6 is lower. The steep mud hopper design eliminates the need for mechanical scraping equipment and also makes the sludge more compact. The sludge can be directly transported for dehydration without concentration, which can save the sludge concentration tank.

[0030] An air weir 10 is provided at the top of each of the two sedimentation areas 3, and a water outlet of the air weir 10 is fixedly connected to a water outlet pipe 11 to achieve constant water level drainage of multiple sedimentation areas 3; a sludge discharge pipe 7 is provided at the bottom of each of the sedimentation areas 3, and the sludge discharge pipe 7 is connected to an external sludge suction treatment equipment.

[0031] When the sedimentation zone 3 is in a static sedimentation state, according to the suspended matter sedimentation principle, it is divided from top to bottom into a free sedimentation zone 301, a flocculation sedimentation zone 302, a stratified sedimentation zone 303, and a compression sedimentation zone 304. The water inlet ports of several water inlet pipes 5 are arranged between the stratified sedimentation zone 303 and the compression sedimentation zone 304, so as to avoid disturbing the bottom sludge and make full use of the filtering effect of the sludge to reduce the rising problem of the suspended matter in the inlet water.

[0032] A plurality of inclined concentric circular inclined plates 8 are arranged on the upper part of the flocculation sedimentation zone 302 to form a vortex effect, realize secondary solid-liquid separation, further increase the water inlet load and enhance the solid-liquid separation effect; the surface load of this device is much higher than that of the traditional sedimentation tank, and there is no need to add micro-sand, magnetic powder and other carriers and sludge circulation to achieve the effect of a high-efficiency sedimentation tank, saving the cost of carrier loss and energy consumption.

[0033] Sludge concentration meters 9 are provided in both the stratified sedimentation area 303 and the compression sedimentation area 3 to control the water inlet flow and the operation cycle by monitoring the sludge concentration, thereby ensuring high-quality effluent water quality.

[0034] When the device is working, sewage is first connected through the sewage pipe 12, and then enters the water inlet pipe 5 after being diverted by the alternating water supply component 4, and is sent to a sedimentation area 3 through the water inlet pipe 5. The sewage naturally settles at the bottom of the sedimentation area 3 to form a sludge layer, and the upper clear liquid is discharged along the top air weir 10 and enters the subsequent treatment equipment; during the rising process of the sewage, a vortex effect is formed by the concentric circular inclined plates 8 to achieve secondary solid-liquid separation; the mud-water interface (the separation interface between the sludge layer and the upper clear liquid) is continuously raised with the transportation of the sewage, and when the mud-water interface reaches the top of the sedimentation area 3 When the sludge concentration is greater than 5000 mg / L, the sludge concentration can be detected by the sludge concentration meter 9. When the detected sludge concentration is greater than 5000 mg / L, the alternating water supply component 4 can be linked to control so that the water inlet pipe 5 stops to be statically precipitated, and the alternating water supply component 4 switches the water inlet pipe 5 so that the water inlet pipe 5 in another sedimentation area 3 is responsible for the water inlet operation; the sedimentation area 3 in the static sedimentation state, after static sedimentation for a period of time, the sludge layer and the supernatant in the sedimentation area 3 are re-stratified, and then continue to wait for the alternating water supply component 4 to switch the water inlet pipe 5 until water is re-introduced from the sedimentation area 3;

[0035] When the equipment has been running for a period of time (the length of time is determined after actual operation tests), a certain amount of sludge accumulates in each sedimentation area 3. At this time, the external sludge extraction and discharge device is started to suck the sludge out of the sedimentation area 3 through the sludge discharge pipe 7.

[0036] Example 2: Please refer to Figure 3 The difference between this embodiment and the first embodiment is that the partition plate 2 of this embodiment divides the inner cavity of the tank body 1 into three sedimentation areas 3, and the water inlet pipe 5 is divided into three lines, which are respectively arranged in the three sedimentation areas 3;

[0037] When it is working, when the water inlet pipe 5 of one sedimentation area 3 is performing water intake operation, another sedimentation area 3 is performing natural sedimentation operation, and at this time the third sedimentation area 3 can perform mud discharge operation, thereby extending the sedimentation time of the sedimentation area 3 and improving the sedimentation separation effect.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A continuous water inlet and outlet high-efficiency sedimentation device, characterized in that: The invention comprises a tank body (1), wherein a partition plate (2) is fixedly connected to the inner wall of the tank body (1), wherein the partition plate (2) divides the inner cavity of the tank body (1) into a plurality of sedimentation areas (3), wherein each of the plurality of sedimentation areas (3) is provided with a water inlet pipe (5), wherein an alternating water supply assembly (4) is fixedly installed on the top of the inner wall of the tank body (1), wherein the tops of the plurality of water inlet pipes (5) are connected to the water outlet end of the alternating water supply assembly (4); wherein each of the plurality of sedimentation areas (3) is provided with an air weir (10) on the top, and each of the plurality of sedimentation areas (3) is provided with a mud discharge pipe (7) on the bottom.

2. A continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 1, characterized in that: The sedimentation zone (3) is divided into a free sedimentation zone (301), a flocculation sedimentation zone (302), a stratified sedimentation zone (303), and a compression sedimentation zone (304) from top to bottom, and the water inlet ports of the plurality of water inlet pipes (5) are all arranged between the stratified sedimentation zone (303) and the compression sedimentation zone (304).

3. A continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 1, characterized in that: The bottom of the inner wall of the tank body (1) is fixedly connected with a conical mud bucket (6).

4. A continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 2, characterized in that: A plurality of concentric circular inclined plates (8) are arranged at an angle on the upper part of the flocculation and sedimentation zone (302).

5. A continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 2, characterized in that: Sludge concentration meters (9) are provided in both the stratified sedimentation zone (303) and the compression sedimentation zone (3).

6. The continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 1 is characterized in that: The tank body (1) has a height of 8-15 m.

7. The continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 1 is characterized in that: The alternating water supply component (4) is an intermediate water distribution bucket.

8. The continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 1 is characterized in that: The number of the precipitation zones (3) is 2-6.

9. The continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 1 is characterized in that: The working method of the device comprises the following steps: Step 1: water is supplied to a sedimentation area (3) through a sewage pipe (12), the sewage naturally settles at the bottom of the sedimentation area (3) to form a sludge layer, and the upper clear liquid is discharged along the top air weir (10); Step 2: The mud-water interface is continuously raised as the sewage is transported. When the mud-water interface reaches the top of the sedimentation zone (3), the water inlet of the water inlet pipe (5) stops for static sedimentation, and the alternating water supply component (4) switches the water inlet pipe (5), and the water inlet pipe (5) in another sedimentation zone (3) is responsible for the water inlet operation; Step 3: After a period of settling, the sludge layer and the supernatant in the sedimentation zone (3) are re-stratified, and then the alternating water supply component (4) switches the water inlet pipe (5) to re-intake water from the sedimentation zone (3); Step 4: The work of steps 1 to 3 is regarded as one cycle. After a number of cycles, the sludge is discharged by suction through the sludge discharge pipe (7).

10. A continuous water inlet, circulating water outlet and efficient sedimentation device according to claim 9, characterized in that: In step 4, the sludge concentration is detected by a sludge concentration meter (9), and the alternating water supply component (4) is linked to control to adjust the water inlet switching cycle of the water inlet pipe (5).

Images