Dosing device and sewage treatment system with same

Abstract

The utility model relates to a chemical feeding device and a sewage treatment system with the chemical feeding device, the chemical feeding device comprises a chemical barrel, the chemical barrel comprises a containing cavity for containing chemicals, and the upper part of the chemical barrel is provided with a liquid inlet and a feeding port which are communicated with the containing cavity; the stirring mechanism comprises a stirring piece capable of extending into the containing cavity and a driving assembly for driving the stirring piece; the output mechanism comprises an agent conveying pipeline communicated with the containing cavity and a conveying pump arranged on the agent conveying pipeline, and the output mechanism is used for outputting the agent in the agent barrel; the flushing mechanism is provided with a flushing pipeline communicated to the pesticide conveying pipeline and a first control valve for controlling the flushing pipeline to be opened and closed, and the flushing mechanism is used for flushing the pesticide conveying pipeline when the first control valve is opened; and the control unit is in communication connection with the stirring mechanism, the output mechanism and the flushing mechanism. The chemical adding device disclosed by the utility model is good in universality, has good adaptive capacity to chemicals which are high in viscidity and easy to precipitate, and can meet the chemical adding requirements of chemicals with different characteristics.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially, relate to a kind of dosing device and sewage treatment system with it. BACKGROUND

[0002] Sewage treatment refers to the treatment of production, sewage to make it reach the prescribed discharge standard, to solve the environmental pollution problem caused by direct discharge of sewage, which is one of the important measures to protect the environment. In the process of treatment, sewage treatment plant usually adds the prepared sewage treatment reagent to the sewage after filtering, to further improve water quality. In the existing various sewage treatment schemes, the use of flocculants, coagulants and other water purification reagents in terminal water treatment has become an indispensable auxiliary method. Therefore, the dosing device for adding reagent and improving dissolution efficiency has been widely used in water treatment system.

[0003] However, the existing dosing device has some problems. For example, common PAC flocculant dosing device, PAM flocculant dosing device, lime dosing device, etc. Due to the large difference in characteristics of different reagents, the same model of dosing device is difficult to meet the use requirements of different reagents. Specifically, the flocculant has large viscosity, and the corresponding dosing device needs to be equipped with a large power mixer. The lime dosing device is prone to precipitation in the dosing pipeline due to the low solubility of lime, so these problems need to be solved.

[0004] Therefore, it is necessary to provide an improved technical solution to solve the problem that the existing dosing device is difficult to adapt to reagents with different characteristics. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the technical problems existing in the prior art, and provides a dosing device to achieve the above utility model purposes. The specific design method is as follows.

[0006] A dosing device comprises: a reagent cylinder comprising a receiving cavity for receiving reagents, the upper part of the reagent cylinder is provided with a liquid inlet and a feeding port communicating with the receiving cavity; a stirring mechanism comprising a stirring member capable of extending into the receiving cavity and a driving assembly driving the stirring member; an output mechanism comprising a reagent conveying pipeline communicating with the receiving cavity and a conveying pump provided on the reagent conveying pipeline, for outputting the reagents in the reagent cylinder; a flushing mechanism having a flushing pipeline communicating with the reagent conveying pipeline and a first control valve controlling the on-off of the flushing pipeline, for flushing the reagent conveying pipeline when the first control valve is opened; a control unit in communication with the stirring mechanism, the output mechanism and the flushing mechanism.

[0007] As a further improvement of the utility model, the delivery pump is arranged between the medicine delivery pipeline and the medicine cylinder.

[0008] As a further improvement of the utility model, the output mechanism further has a check valve arranged at the outlet end of the delivery pump, and the medicine delivery pipeline is connected to the check valve.

[0009] As a further improvement of the utility model, the medicine adding device further has a liquid inlet pipeline connected to the liquid inlet and a second control valve for controlling the on-off of the liquid inlet pipeline, and the second control valve is communicatively connected to the control unit.

[0010] As a further improvement of the utility model, the medicine adding device further has a feeding control valve for controlling the opening and closing of the feeding port, and the feeding control valve is configured to be opened or closed in linkage with the second control valve.

[0011] As a further improvement of the utility model, the medicine adding device further has a liquid level detection mechanism for detecting the liquid level of the medicine in the medicine cylinder, and the liquid level detection mechanism is communicatively connected to the control unit; and the opening and closing of the second control valve is controlled by the detection signal of the liquid level detection mechanism: when the liquid level in the medicine cylinder is lower than a first preset value, the second control valve is opened; and when the liquid level in the medicine cylinder is higher than a second preset value, the second control valve is closed.

[0012] As a further improvement of the utility model, the feeding port is arranged on the top wall of the medicine cylinder, and the medicine adding device further has a feeding bin arranged outside the medicine cylinder, and the feeding bin is funnel-shaped and connected to the feeding port at the lower end.

[0013] As a further improvement of the utility model, the stirring mechanism comprises a fixing seat, a driving assembly and a stirring assembly; the fixing seat is fixedly arranged at the top of the medicine cylinder, the driving assembly comprises a driving motor mounted to the fixing seat and a rotating shaft extending from the output end of the driving motor to the inside of the receiving cavity, and the stirring assembly comprises a spiral belt fixed to the rotating shaft.

[0014] As a further improvement of the utility model, the medicine adding device further has a discharging port arranged at the bottom position of the medicine cylinder.

[0015] The utility model further provides a sewage treatment system, and the sewage treatment system has the above-mentioned medicine adding device.

[0016] The utility model has the advantages that the medicine adding device has good universality, has good adaptability to medicines with large viscosity and easy precipitation, can meet the medicine adding requirements of medicines with different characteristics, and can solve the problem that the same type of medicine adding device in the prior art is difficult to adapt to medicines with different characteristics. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 The diagram shown is a schematic representation of one embodiment of the dosing device of this utility model.

[0019] In the diagram, 100 is the reagent cylinder, 10 is the receiving cavity, 11 is the liquid inlet, and 12 is the feeding port; 200 is the stirring mechanism, 21 is the fixed base, 22 is the drive assembly, 221 is the drive motor, 222 is the rotating shaft, and 23 is the screw ribbon; 300 is the output mechanism, 31 is the drug delivery pipeline, 32 is the delivery pump, and 33 is the check valve; 400 is the flushing mechanism, 41 is the flushing pipeline, and 42 is the first control valve; 51 is the liquid inlet pipeline, and 52 is the second control valve; 600 is the liquid level detection mechanism, 601 is the upper ball valve, and 602 is the lower ball valve; 700 is the feeding bin; 81 is the discharge port, 82 is the discharge valve, and 83 is the receiving container; and 900 is the water supply pipeline. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] refer to Figure 1 The figure shows a schematic diagram of the structure of a dosing device according to this utility model. As shown in the figure, the dosing device involved in this embodiment includes a drug cylinder 100, a stirring mechanism 200, an output mechanism 300, a rinsing mechanism 400, and a control unit. The control unit is communicatively connected to the stirring mechanism 200, the output mechanism 300, and the rinsing mechanism 400, enabling intelligent control.

[0022] Specifically, referring to the figure, the reagent cylinder 100 involved in this embodiment has a receiving cavity 10 for containing reagents, and the upper part of the reagent cylinder 10 is provided with an inlet 11 and a feed inlet 12 communicating with the receiving cavity 10. It is easy to understand that the inlet 11 is usually used as an inlet for adding industrial water; the feed inlet 12 is usually used as an inlet for adding solid reagents. Specifically, the solid reagents can be commonly used wastewater treatment reagents such as polyacrylamide (PAM), polyaluminum chloride (PAC), lime, ferrous sulfate, or sodium carbonate.

[0023] The stirring mechanism 200 involved in this embodiment has a stirring element that extends into the receiving cavity 10 to perform stirring operations and a driving assembly that drives the stirring element. After adding industrial water and solid pharmaceutical agent into the receiving cavity 10 of the pharmaceutical cylinder 100, the stirring operation performed by the stirring mechanism 200 can promote the dissolution of the solid pharmaceutical agent, so that the pharmaceutical agent in the solution has a more uniform distribution concentration.

[0024] The output mechanism 300 involved in this embodiment has a delivery pipe 31 for discharging the medicine in the medicine cylinder 100. The output mechanism 300 includes a delivery pipe 31 communicating with the receiving cavity 10 and a delivery pump 32 disposed on the delivery pipe 31. In a specific wastewater treatment process, the dosing device adds medicine to the target location (such as a wastewater treatment tank in a certain stage) through the delivery pipe 31 of the output mechanism 300. It can be understood that, in order to facilitate the output of the solution in the medicine cylinder 100, the output port (not marked in the figure) of the medicine cylinder 100 is located at or near the bottom of the medicine cylinder 100, and the medicine solution in the medicine cylinder 100 enters the delivery pipe through the output port and is then added to the target location.

[0025] The flushing mechanism 400 involved in this embodiment has a flushing pipe 41 connected to the drug delivery pipe 31 and a first control valve 42 for controlling the opening and closing of the flushing pipe 41. The flushing mechanism 400 is used to flush the drug delivery pipe 31 when the first control valve 41 is open.

[0026] This utility model also provides a sewage treatment system, which has a dosing device with the structure shown in the figure.

[0027] It is understood that, based on the specific structure of the dosing device provided by this utility model, when the solid agent added to the dosing cylinder 100 is a high-viscosity agent such as polyacrylamide (PAM) or polyaluminum chloride (PAC), the dissolution rate of the agent can be accelerated by controlling the power of the stirring mechanism 200; when the solid agent added to the dosing cylinder 100 is a slightly soluble agent such as lime, after the agent is output from the dosing pipeline 31, the dosing pipeline 31 can be flushed by the flushing mechanism 400, thereby avoiding problems such as sedimentation in the dosing pipeline 31; at the same time, this dosing device can also adapt to the dosing operation of easily soluble and non-viscous agents.

[0028] In other words, the dosing device provided by this utility model has good versatility and is well adaptable to agents with high viscosity and easy precipitation. It can meet the dosing needs of agents with different characteristics and solve the problem that the same model of dosing device in the prior art is difficult to adapt to agents with different characteristics.

[0029] As a preferred embodiment of this utility model, refer to Figure 1 As shown, the delivery pump 32 is positioned between the drug delivery pipeline 31 and the drug cylinder 100. In the illustrated embodiment, the inlet end of the delivery pump 32 is connected to the outlet (not marked) of the drug cylinder 100. In practice, the inlet end of the delivery pump 32 can be connected to the outlet of the drug cylinder 100 via a pipeline.

[0030] In this embodiment, based on the delivery pump 32, when using a dosing device to perform dosing operations at the target location, the dosing speed can be increased, and the deposition of the drug in the delivery pipeline 31 due to the slow flow rate of the solution can be reduced.

[0031] As a further preferred embodiment of this invention, the output mechanism 300 also includes a check valve 33 disposed at the outlet end of the delivery pump 32, wherein the drug delivery pipeline 31 is connected to the check valve 33. It is understood that, in specific implementations, the inlet end of the check valve 33 can be connected to the outlet end of the delivery pump 32 via a pipeline, and the drug delivery pipeline 31 can be directly connected to the outlet end of the check valve 33.

[0032] In this embodiment, when the dosing device is used to dosing the drug at the target location, the check valve 33 does not affect the delivery pump 32 from outputting the drug to the delivery pipeline 31; and when the dosing device completes the dosing operation and the flushing mechanism 400 is used to clean the delivery pipeline 31, the check valve 33 can prevent the cleaning water from flowing back into the receiving cavity 10 of the drug cylinder 100.

[0033] In a specific embodiment of this utility model, reference is made to Figure 1 As shown, the dosing device also includes an inlet pipe 51 connected to the inlet port 11 and a second control valve 52 that controls the opening and closing of the inlet pipe 51. The second control valve 52 is communicatively connected to the control unit. It is easy to understand that when the second control valve 52 is open, the inlet pipe 51 is open, allowing industrial water to enter the receiving cavity 10 of the reagent cartridge 100 through the inlet pipe 51; when the second control valve 52 is closed, the inlet pipe 51 is blocked, stopping the industrial water from entering the receiving cavity 10 of the reagent cartridge 100.

[0034] In some more specific embodiments, the first control valve 42 and the second control valve 52 involved in this utility model are both pneumatic switching valves.

[0035] In some embodiments of this utility model, the dosing device also has a dosing control valve (not shown in the figure) for controlling the opening and closing of the dosing port 12, wherein the dosing control valve is configured to open or close in conjunction with the second control valve 52.

[0036] In other words, during the dosing process in the dosing device's reagent cylinder 100, when the second control valve 52 is opened to input industrial water, the dosing control valve will open in conjunction to add solid reagents; and when the second control valve 52 is closed to stop the input of industrial water, the dosing control valve will close in conjunction.

[0037] In the specific implementation process, the opening size of the feeding control valve can be controlled by the frequency converter, thereby controlling the amount of solid agent added, and thus controlling the concentration of the agent solution in the agent cylinder 100 of the final dosing device.

[0038] As a further preferred embodiment of the present invention, in some specific embodiments, the dosing device also has a liquid level detection mechanism 600 for detecting the liquid level in the drug cylinder 100. The liquid level detection mechanism 600 is communicatively connected to the control unit and is configured such that the opening and closing of the second control valve 52 is controlled by the detection signal of the liquid level detection mechanism 600: when the liquid level in the drug cylinder 100 is lower than the first preset value, the second control valve 52 is opened; when the liquid level in the drug cylinder 100 is higher than the second preset value, the second control valve 52 is closed.

[0039] In a specific application scenario, the first preset value can be set to 0.2m, and the second preset value can be set to 1m. When the liquid level detection mechanism 600 detects that the liquid level in the receiving cavity 10 is below 0.2m, the second control valve 52 and the feeding control valve automatically open to add industrial water and solid reagents. Conversely, when the liquid level detection mechanism 600 detects that the liquid level in the receiving cavity 10 is above 1m, the second control valve 52 and the feeding control valve automatically close to stop the addition of industrial water and solid reagents. During this process, the stirring mechanism 200 can be activated simultaneously to accelerate the dissolution of the reagents.

[0040] refer to Figure 1 As shown in the illustration, in this specific embodiment, the liquid level detection mechanism 600 is a liquid level gauge. In practice, the upper and lower ends of the liquid level gauge are connected to the reagent cylinder 100 via an upper ball valve 601 and a lower ball valve 602, respectively. The arrangement of the upper ball valve 601 and the lower ball valve 602 facilitates the maintenance of the dosing device.

[0041] Further reference Figure 1 As shown, in this specific embodiment, the feeding port is located on the top wall of the drug cylinder 100, and the drug dosing device also has a feeding bin 700 located outside the drug cylinder 100. Preferably, the feeding bin is funnel-shaped and its lower end is connected to the feeding port 12. Because the feeding bin 700 is funnel-shaped, the feeding of solid drugs can be made more convenient.

[0042] In some embodiments of this utility model, reference is made to Figure 1 As shown, the stirring mechanism includes a fixed base 21, a drive assembly 22, and a stirring assembly 23. The fixed base 21 is fixedly disposed on the top of the medicine cylinder 100. The drive assembly 22 includes a drive motor 221 mounted to the fixed base 21 and a rotating shaft 222 extending from the output end of the drive motor 221 into the receiving cavity 10. The stirring assembly 23 includes a screw belt fixed to the rotating shaft 222.

[0043] exist Figure 1 In the specific embodiment shown, two spiral stainless steel ribbons are arranged opposite each other on the rotating shaft 22 and fixed to the rotating shaft 22 by several stainless steel crossbars (not shown in the figure). The double spiral ribbons involved in this embodiment enable the material to circulate within the reagent cylinder 100 during stirring. Its function is mainly volumetric circulation, with minimal shearing action and good up-and-down tumbling effect. Based on this, the dosing device involved in this embodiment can effectively dissolve some highly viscous materials. The double spiral ribbon stirring is suitable for mixing various powders, granules, and flakes, and is particularly adaptable to materials with high viscosity, low density, and high specific gravity.

[0044] As a further preferred embodiment of this utility model, refer to Figure 1 As shown, the dosing device also has a discharge port 81 located at the bottom of the dosing cylinder. During actual use, if the dosing device malfunctions or other reasons necessitate discharging the agent from the dosing cylinder 100, the agent can be quickly discharged through the discharge port 81, facilitating maintenance.

[0045] In the specific implementation process, a discharge valve 82 that is kept in a normally closed state can be installed at the discharge port 81, and a receiving container 83 for holding the medicine discharged from the discharge port 81 is also provided at the corresponding discharge port 81.

[0046] Furthermore, it can be understood that in the specific application scenarios of this utility model's dosing device, the flushing pipe 41 and the liquid inlet pipe 51 are mainly used as industrial water supply pipes. To simplify pipe installation, refer to... Figure 1 As shown, in this specific embodiment, both the flushing pipe 41 and the liquid inlet pipe 51 are connected to the same water supply pipe 900.

[0047] To better understand this utility model, the following is combined with Figure 1The specific structure of the dosing device is shown, and its general dosing operation process is described as follows: First, the drug is prepared in the reagent cylinder 100. The second control valve 52 is opened to input industrial water, and the feeding control valve is opened in conjunction to add the solid drug. The stirring mechanism 200 is started to stir, and the liquid level detection mechanism 600 detects the liquid level in the reagent cylinder 100. When the liquid level reaches the set level, the second control valve 52 and the feeding control valve automatically close, and the delivery pump 32 starts to perform the dosing operation on the specific target. When dosing stops, the delivery pump 32 is turned off, the first control valve 42 is opened, and industrial water is used to flush the drug delivery pipeline 31 to prevent some high-viscosity, easily sedimented materials from forming sediment in the pipeline and avoiding blockage of the drug delivery pipeline 31.

[0048] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0049] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalents made without departing from the spirit of this utility model are valid.

Claims

1. A dosing device, characterized in that, include: The medicine cylinder (100) includes a receiving cavity (10) for containing medicine, and the upper part of the medicine cylinder (100) is provided with a liquid inlet (11) and a feeding port (12) communicating with the receiving cavity (10). The stirring mechanism (200) includes a stirring element capable of extending into the receiving cavity (10) and a driving assembly for driving the stirring element; The output mechanism (300) includes a drug delivery pipe (31) communicating with the receiving cavity (10) and a delivery pump (32) disposed on the drug delivery pipe (31) for outputting the drug in the drug cylinder (100); The flushing mechanism (400) has a flushing pipe (41) connected to the drug delivery pipe (31) and a first control valve (42) for controlling the opening and closing of the flushing pipe (41) to flush the drug delivery pipe (31) when the first control valve (42) is open. The control unit is communicatively connected to the stirring mechanism (200), the output mechanism (300), and the rinsing mechanism (400).

2. The dosing device according to claim 1, characterized in that, The delivery pump (32) is located between the drug delivery pipeline (31) and the drug cylinder (100).

3. The dosing device according to claim 2, characterized in that, The output mechanism also has a check valve (33) located at the outlet end of the delivery pump (32), and the drug delivery pipeline (31) is connected to the check valve (33).

4. The dosing device according to claim 1, characterized in that, The dosing device also has an inlet pipe (51) connected to the inlet (11) and a second control valve (52) for controlling the opening and closing of the inlet pipe (51), the second control valve (52) being communicatively connected to the control unit.

5. The dosing device according to claim 4, characterized in that, The dosing device also has a dosing control valve for controlling the opening and closing of the dosing port (12), and the dosing control valve is configured to open or close in conjunction with the second control valve (52).

6. The dosing device according to claim 4 or 5, characterized in that, The dosing device also has a liquid level detection mechanism (600) for detecting the liquid level of the drug in the drug cylinder (100), and the liquid level detection mechanism (600) is communicatively connected to the control unit.

7. The dosing device according to any one of claims 1-5, characterized in that, The feeding port (12) is located on the top wall of the drug cylinder (100). The drug dosing device also has a feeding bin (700) located outside the drug cylinder (100). The feeding bin (700) is funnel-shaped and its lower end is connected to the feeding port (12).

8. The dosing device according to any one of claims 1-5, characterized in that, The stirring mechanism (200) includes a fixed base (21), a drive assembly (22), and a stirring assembly (23); the fixed base (21) is fixedly disposed on the top of the medicine cylinder (100); the drive assembly (22) includes a drive motor (221) mounted on the fixed base (21) and a rotating shaft (222) extending from the output end of the drive motor (221) into the interior of the receiving cavity (10); the stirring assembly (23) includes a screw ribbon fixed to the rotating shaft.

9. The dosing device according to any one of claims 1-5, characterized in that, The dosing device also has a discharge port (81) located at the bottom of the drug cylinder (100).

10. A wastewater treatment system, characterized in that, The wastewater treatment system has a dosing device as described in any one of claims 1-9.

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