CN216236207U - Multistage flocculation and precipitation system suitable for landfill leachate preliminary treatment - Google Patents
Multistage flocculation and precipitation system suitable for landfill leachate preliminary treatment Download PDFInfo
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- CN216236207U CN216236207U CN202122898103.2U CN202122898103U CN216236207U CN 216236207 U CN216236207 U CN 216236207U CN 202122898103 U CN202122898103 U CN 202122898103U CN 216236207 U CN216236207 U CN 216236207U
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Abstract
The utility model discloses a multi-stage flocculation and precipitation system suitable for garbage leachate pretreatment, which comprises a water inlet pump, a water inlet pipe, a multi-stage flocculation and precipitation tank, a dosing system, a stirrer, a flow meter, a PLC (programmable logic controller) control system and a water outlet, wherein the water inlet pump supplies garbage leachate to the multi-stage flocculation and precipitation tank through the water inlet pipe; a dosing system, a stirrer and a water outlet are arranged on the multi-stage flocculation sedimentation tank, and the dosing system and the water inlet pump are controlled by a PLC control system; the flowmeter is arranged on the water inlet pipe. The flocculation sedimentation system designed by the utility model implements multi-stage flocculation and multi-stage sedimentation, so that the consumption of a flocculating agent can be reduced, and the flocculation sedimentation effect can be improved; the PLC control system realizes multi-party linkage, has high automation degree, is simple and convenient to operate and saves manpower; can simultaneously remove suspended matters, hardness, heavy metals and macromolecular organic matters in the leachate, and greatly reduces the full-quantization treatment difficulty of the leachate.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment sedimentation tanks, and particularly relates to a multistage flocculation sedimentation system suitable for pretreatment of landfill leachate.
Background
Flocculation is the most basic and important treatment process in the treatment of industrial water and domestic sewage, and by adding some medicaments (generally called flocculating agent and coagulant aid) into water, particles which are difficult to precipitate in the water can be polymerized with each other to form colloid, and then are combined with impurities in the water body to form larger floccules. The flocculating constituent has strong adsorption capacity, can adsorb suspended matters, and can adsorb partial bacteria and soluble substances. The flocs sink down by increasing their volume through adsorption. The application of the flocculation precipitation process in water treatment has been in history for hundreds of years, and compared with other physical and chemical methods, the flocculation precipitation process has the advantages of good effluent quality, stable and reliable process operation, economy, practicality, simplicity and convenience in operation and the like. However, the applicability of the existing flocculation sedimentation tank to landfill leachate pretreatment is poor, because landfill leachate pollutants are of various types and high in concentration, and the change of water quality and water quantity is large, the traditional flocculation sedimentation tank not only consumes more flocculants, but also has poor flocculation effect, so that the reduction interference factors of the pollutants of the subsequent processes are more, and the difficulty of full-quantification treatment is increased. Therefore, the special flocculation sedimentation tank for the landfill leachate is designed and researched, so that the pretreatment effect of the leachate is facilitated, and a foundation is laid for full-quantitative treatment of the landfill leachate.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a multistage flocculation and precipitation system suitable for pretreatment of landfill leachate.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a multi-stage flocculation and precipitation system suitable for landfill leachate pretreatment comprises a water inlet pump, a water inlet pipe, a multi-stage flocculation and precipitation tank, a dosing system, a stirrer, a flow meter, a PLC (programmable logic controller) control system and a water outlet, wherein the water inlet pump supplies garbage leachate to the multi-stage flocculation and precipitation tank through the water inlet pipe; the multistage flocculation sedimentation tank is provided with a dosing system, a stirrer and a water outlet, and the dosing system and the water inlet pump are controlled by a PLC control system; the flowmeter is arranged on the water inlet pipe.
Furthermore, the multistage flocculation sedimentation tank is formed by connecting a plurality of groups of reaction units in series; the reaction unit comprises a reaction tank, a precipitation tank and a partition plate, and the reaction tank and the precipitation tank are separated by the partition plate; the reaction tank is connected with a dosing system and is independently provided with a stirrer, and the number of reaction units can be selected and installed according to the condition of percolate.
Further, the baffle constitute by two wallboards, two wallboard dislocation mounting, wherein a wallboard is installed down, another piece is installed up, misplaces about both, liquid in the reaction tank flows to the precipitation tank from lower to upper from the gap between two wallboards.
Furthermore, the dosing system comprises a flocculant tank, a dosing pipe and a metering pump, wherein the flocculant tank is communicated with the reaction tanks through the dosing pipe, and the plurality of dosing pipes are connected to the flocculant tank and can provide flocculants for the plurality of reaction tanks; the dosing pipe is provided with a metering pump, and the metering pump is controlled by a PLC control system.
Furthermore, the PLC control system controls a plurality of metering pumps and a plurality of stirrers simultaneously, and the same control system controls the operation of the whole multistage flocculation and precipitation system.
Furthermore, multistage flocculation sedimentation tank adopt and push away STREAMING water inflow, can avoid promoting the energy consumption of sewage once more, can reduce the disturbance to the mixed liquid after flocculating again, increase the flocculation effect.
Further, the reaction tank and the sedimentation tank in the multistage flocculation sedimentation tank reduce the effective water depth along the liquid flowing direction in sequence, and the mixed liquid in the front tank and the rear tank is prevented from being mixed again to influence the treatment effect.
Furthermore, the volume of the reaction tank is smaller than that of the precipitation tank, the reaction tank is small, so that the flocculant and pollutants in the percolate can fully react to form nuclei, and the large floccule is formed by continuous reaction in the precipitation tank with a large space, so that rapid precipitation separation of mud and water is realized.
The device further comprises a liquid level meter, wherein the liquid level meter is arranged in the precipitation tank with the lowest liquid level; the liquid level meter is in telecommunication connection with the PLC control system, the PLC control system controls the work of the water inlet pump according to data monitored by the liquid level meter, the liquid level meter is used for monitoring the liquid level condition in the sedimentation tank, and the PLC control system carries out intelligent control on the water inlet pump, the metering pump and the stirrer through the data monitored by the liquid level meter.
Further, the liquid level meter is an ultrasonic liquid level meter, a floating ball liquid level meter or a press transmitter
The utility model has the advantages that: the flocculation sedimentation system designed by the utility model implements multi-stage flocculation and multi-stage sedimentation, so that the consumption of a flocculating agent can be reduced, and the flocculation sedimentation effect can be improved; and each reaction tank adopts a form of water inlet at the upper end and water outlet at the lower end, a flocculating agent is added from the upper end, and the treatment of the infiltration filtrate in two adjacent tank bodies is not interfered with each other; the PLC control system realizes multi-party linkage, has high automation degree, is simple and convenient to operate and saves manpower; can simultaneously remove suspended matters, hardness, heavy metals and macromolecular organic matters in the leachate, and greatly reduces the full-quantization treatment difficulty of the leachate.
Drawings
FIG. 1 is a schematic diagram of a multistage flocculation precipitation system suitable for landfill leachate pretreatment.
Detailed Description
The utility model is described in detail below with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the directions or positional relationships indicated by "left", "right", "upper", "lower", "left", "right", and the like are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships which are usually placed when the products of the present invention are used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to be referred to must have a specific direction, a specific direction configuration and operation, and thus, the present invention is not to be construed as being limited.
As shown in figure 1, a multistage flocculation and precipitation system suitable for landfill leachate preliminary treatment, including intake pump 1, inlet tube 2, multistage flocculation and precipitation pond, charge system, agitator 3, flowmeter 4, PLC control system 5, delivery port 6 and level gauge 13, whole multistage flocculation and precipitation pond is for strengthening the channel-section steel cell body, inside and outside coating anticorrosive material. The multi-stage flocculation sedimentation tank is formed by connecting a plurality of groups of reaction units in series; the reaction unit includes reaction tank 7, precipitation tank 8 and baffle 9, separates through baffle 9 between reaction tank 7 and the precipitation tank 8, and reaction tank 7 is located the left side, and precipitation tank 8 is located the right, and reaction tank 7's volume ratio precipitation tank 8 is small, and little reaction tank 7 can let impurity in the filtration liquid mix more fully with the flocculating agent, and the precipitation of the convenient flocculating constituent of big precipitation tank. The reaction tank 7 and the precipitation tank 8 are identical in size (length and height) except for their different widths (the lateral distance is the width and the vertical distance is the height in the figure). The partition plate 9 consists of two wall plates which are installed in a staggered mode, and liquid flows to the settling tank 8 from bottom to top under the action of the partition plate 9; the distance between the two wallboards is 5 cm. Reaction tank 7 on be connected with medicine system and independently install agitator 3, agitator 3 includes agitator motor and stirring leaf, agitator 3 installs the top at reaction tank 7 down. The water inlet pump 1 supplies garbage penetrating fluid for the multi-stage flocculation sedimentation tank through the water inlet pipe 2, and the flow meter 4 is arranged on the water inlet pipe 2. The upper portion of the reaction tank 7 on the left side that is leftmost is installed at multistage flocculation and precipitation pond is installed to inlet tube 2, delivery port 6 install the lower part that the right that is rightmost is the rightmost sedimentation tank at multistage flocculation and precipitation pond, liquid in multistage flocculation and precipitation pond flows from a left side to the right side. The multistage flocculation sedimentation tank adopts plug-flow type water inflow, the effective water depth is reduced in sequence along the flowing direction of liquid, the upper end water inflow and the lower end water outflow form are adopted, the water inflow is carried out automatically until the water outflow, and the flocculating agent is added from the upper end. And a liquid level meter 13 is installed on the upper part of the rightmost end precipitation tank 8, and the dosing system, the water inlet pump 1, the stirrer 3, the liquid level meter 13, the flowmeter 4 and the PLC control system 5 are electrically connected. The PLC control system 5 can control the water inlet pump 1 to stop working when the data monitored by the liquid level meter 13 is higher than a preset high water level, and control the water inlet pump 1 to start when the data is lower than a preset low water level.
The dosing system of this embodiment includes flocculating agent jar 10, adds pencil 11 and measuring pump 12, and flocculating agent jar 10 is through adding pencil 11 and reaction tank 7 intercommunication, and each reaction tank 7 possess solitary pencil 11 that adds. A metering pump 12 is arranged on the dosing pipe 11, and the dosing amount and the dosing time of the metering pump 12 are controlled by a PLC control system 5. The PLC control system 5 controls a plurality of metering pumps 12 simultaneously, and unified management control is achieved. PLC control system 5 can realize that intake pump 1 starts time measuring pump 12 and agitator 3 and all start, when intake pump 1 stopped, measuring pump 12 stopped, agitator 3 time delay certain time stops again. The PLC control system 5 can simultaneously control a plurality of metering pumps 12 and a plurality of stirrers 3, and the metering pumps 12 and the stirrers 13 can also be asynchronously controlled according to the requirements.
The water inlet pump 1 is a corrosion-resistant submersible pump or a self-priming centrifugal pump. The liquid level meter 13 is an ultrasonic liquid level meter, a floating ball liquid level meter or a press transmitter.
Although particular embodiments of the present invention have been described and illustrated in detail, it should be noted that various changes and modifications could be made to the above-described embodiments without departing from the spirit of the utility model and the scope of the appended claims.
Claims (10)
1. The multi-stage flocculation and precipitation system suitable for landfill leachate pretreatment is characterized by comprising a water inlet pump (1), a water inlet pipe (2), a multi-stage flocculation and precipitation tank, a dosing system, a stirrer (3), a flow meter (4), a PLC (programmable logic controller) control system (5) and a water outlet (6), wherein the water inlet pump (1) supplies landfill leachate to the multi-stage flocculation and precipitation tank through the water inlet pipe (2); the multistage flocculation sedimentation tank is provided with a dosing system, a stirrer (3) and a water outlet (6), and the dosing system and the water inlet pump (1) are controlled by a PLC control system (5); the flowmeter (4) is arranged on the water inlet pipe (2).
2. The multi-stage flocculation sedimentation system suitable for landfill leachate pretreatment of claim 1, wherein the multi-stage flocculation sedimentation tank is composed of a plurality of groups of reaction units connected in series; the reaction unit comprises a reaction tank (7), a precipitation tank (8) and a partition plate (9), wherein the reaction tank (7) is separated from the precipitation tank (8) through the partition plate (9); the reaction tank (7) is connected with a dosing system and is independently provided with a stirrer (3).
3. The multistage flocculation and precipitation system for the pretreatment of landfill leachate according to claim 2, wherein the partition (9) is composed of two wall panels, and the two wall panels are installed in a staggered manner.
4. The multistage flocculation and precipitation system suitable for landfill leachate pretreatment according to claim 3, wherein the dosing system comprises a flocculant tank (10), a dosing pipe (11) and a metering pump (12), the flocculant tank (10) is communicated with the reaction tank (7) through the dosing pipe (11); the dosing pipe (11) is provided with a metering pump (12).
5. The multistage flocculation and precipitation system for landfill leachate pretreatment of claim 4, wherein the PLC control system (5) controls a plurality of metering pumps (12) and a plurality of agitators (3) simultaneously.
6. The multi-stage flocculation and sedimentation system for landfill leachate pretreatment of claim 5, wherein the multi-stage flocculation and sedimentation tank adopts plug flow type influent water.
7. The multistage flocculation and precipitation system suitable for landfill leachate pretreatment of claim 6, wherein the effective water depth of the reaction tank (7) and the precipitation tank (8) in the multistage flocculation and precipitation tank is sequentially reduced along the liquid flowing direction.
8. The multistage flocculation and precipitation system for landfill leachate pretreatment of claim 7, wherein the volume of the reaction tank (7) is smaller than the volume of the precipitation tank (8).
9. The multistage flocculation and precipitation system suitable for landfill leachate pretreatment of any of claims 1-8, characterized in that, further comprising a liquid level meter (13), wherein the liquid level meter (13) is installed in the precipitation tank (8) with the lowest liquid level; the liquid level meter (13) is in telecommunication connection with the PLC control system (5), and the PLC control system (5) controls the work of the water inlet pump (1) according to data monitored by the liquid level meter (13).
10. The multistage flocculation and precipitation system suitable for landfill leachate pretreatment of claim 9, wherein the level meter (13) is an ultrasonic level meter, a floating ball level meter or a press transducer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122898103.2U CN216236207U (en) | 2021-11-24 | 2021-11-24 | Multistage flocculation and precipitation system suitable for landfill leachate preliminary treatment |
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| CN202122898103.2U CN216236207U (en) | 2021-11-24 | 2021-11-24 | Multistage flocculation and precipitation system suitable for landfill leachate preliminary treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772796A (en) * | 2022-05-25 | 2022-07-22 | 江苏明湖生物能源科技有限公司 | Multi-impurity sewage sedimentation promoting device and working method thereof |
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2021
- 2021-11-24 CN CN202122898103.2U patent/CN216236207U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772796A (en) * | 2022-05-25 | 2022-07-22 | 江苏明湖生物能源科技有限公司 | Multi-impurity sewage sedimentation promoting device and working method thereof |
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