Improved dosing device and full-automatic control system for municipal sewage plant

Abstract

The utility model discloses an improved dosing device and a full-automatic control system for a municipal sewage plant, and belongs to the technical field of sewage treatment. Comprising a solution box, a control cabinet and a dosage detection assembly arranged in a medicament adding pool, a chemical outlet of the solution tank is connected to an inlet of the chemical feeding pump, and an outlet of the chemical feeding pump is connected to the return pipeline and the dilution pipeline respectively; the dilution pipeline is provided with a dilution device, and a dilution water inlet of the dilution device is communicated to the reclaimed water pipe; and an outlet of the diluting device is communicated to the medicament adding tank through a medicament adding pipe. According to the full-automatic dosing system, the arrangement of process equipment is simplified, all the components are matched with one another to form the complete full-automatic dosing system, and the automatic operation degree is achieved; brand new design is made in the aspects of medicine dissolving efficiency, self-cleaning of a medicine adding pipeline and automatic control of a medicine adding system, and operation management work of a municipal sewage plant is more efficiently and conveniently facilitated; the medicament can be fully and quickly dissolved, and the problem of long medicament dissolving time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an improved dosing device and a full-automatic control system for a municipal sewage plant. Background Art

[0002] The dosing room equipment of municipal sewage treatment plants is generally divided into PAC dosing devices, PAM dosing devices, sodium acetate dosing devices, and sodium hypochlorite dosing devices. The existing dosing systems are all traditional dosing devices, and manual dosing has the following defects.

[0003] (1) During the drug preparation stage, manual operation is required, and the drug dissolution equipment is inefficient, incomplete, and takes a long time to dissolve. At the same time, the amount of liquid to be prepared depends on the operator's visual judgment, which has low accuracy. In addition, during this process, the operator cannot leave the site, which can easily cause economic losses or safety accidents to the factory.

[0004] (2) During the dosing process, the operator needs to determine the dosage based on the records of the drug concentration, which requires complex calculations. In addition, the dosage of the metering pump is manually determined based on the operator's experience. The dosage cannot be adjusted in time according to changes in the actual flow rate, which can easily cause the dosage to fluctuate.

[0005] (3) High labor intensity and large number of personnel; the amount of chemicals added to the sewage treatment plant needs to be manually controlled, and the dosing pipeline is prone to blockage when adding PAC and PAM. Utility Model Content

[0006] The purpose of the utility model is to solve the problems in the prior art, such as insufficient dissolution and long dissolution time, inaccurate manual dosing of drugs, low automation level and pipeline blockage, and to propose an improved dosing device and a fully automatic control system for a municipal sewage plant.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An improved dosing device and fully automatic control system for a municipal sewage treatment plant, comprising a solution tank, a control cabinet, and a dosage detection component arranged in a dosing tank; the drug outlet of the solution tank is connected to the inlet of a dosing pump, and the outlet of the dosing pump is respectively connected to a reflux pipeline and a dilution pipeline;

[0009] The dilution pipeline is provided with a dilution device, the dilution water inlet of the dilution device is connected to the reclaimed water pipe; the outlet of the dilution device is connected to the reagent dosing tank through the dosing pipe;

[0010] The inlet end of the dilution device is provided with an electromagnetic flowmeter; the solution tank is provided with a magnetic flap level meter; the magnetic flap level meter, the electromagnetic flowmeter, the dosing pump, and the dosage detection component are communicatively connected to the control cabinet.

[0011] A manual ball valve is arranged on the pipeline of the medicine outlet.

[0012] In some embodiments, a filter is provided at the inlet end of the dosing pump.

[0013] In some embodiments, the inlet end of the dilution device is provided with: a pulse damper, a manual ball valve, a pressure gauge, a back pressure valve, and an electromagnetic flow meter in sequence along the direction of the dosing water flow.

[0014] In some embodiments, the reflux line is connected to a reflux port of the solution tank;

[0015] The reflux pipeline is provided with a safety valve and a manual ball valve.

[0016] In some embodiments, the drug outlet of the solution tank is connected in parallel to the inlets of multiple drug-adding pumps through branch pipes;

[0017] Each branch pipe is provided with a manual ball valve.

[0018] In some embodiments, the overflow port and the drain port of the solution tank are connected to a drain pipe through an overflow pipe and a drain pipe respectively, and the drain pipe is connected to the factory drainage network;

[0019] The drain port is provided with a manual ball valve.

[0020] In some embodiments, the grey water outlet of the solution tank is connected to a grey water pipe;

[0021] The middle water inlet is provided with an electric ball valve, and the electric ball valve is communicatively connected to the control cabinet.

[0022] In some embodiments, a backwash pipeline is further provided between the reclaimed water pipe and the dosing pipe;

[0023] A high-pressure pump is arranged on the backwash pipeline.

[0024] In some embodiments, a stirring motor is disposed on the top of the solution tank, and a stirring blade is disposed on the output shaft of the stirring motor extending downward;

[0025] The inner wall of the solution tank is provided with a spoiler;

[0026] The top of the solution tank is provided with a drug outlet, a reflux outlet, a medium water outlet, and a drug adding outlet;

[0027] An overflow port and a drain port are arranged on the side of the solution tank.

[0028] In some embodiments, the spoiler 3 is an inclined plate inclined downwardly inwardly.

[0029] Compared with the prior art, the utility model provides an improved dosing device and a fully automatic control system for a municipal sewage plant, which have the following beneficial effects.

[0030] 1. The utility model has a streamlined layout of process equipment, and each component cooperates with each other to form a complete full-automatic dosing system to achieve the degree of automated operation; a dilution device f11 is added, and the program is set in the PLC control cabinet to control the dilution device to inject water into the dosing pipeline in proportion to adjust the concentration of the agent; a strong backwashing device is added to perform reverse backwashing on the dosing pipeline through a high-pressure pump.

[0031] 2. The utility model makes a new design in terms of drug dissolution efficiency, self-cleaning of dosing pipes, and automatic control of dosing systems, which is more efficient and convenient for the operation and management of municipal sewage treatment plants; it can fully and quickly dissolve the drugs and solve the problem of long dissolution time; the supporting intelligent system realizes the full automatic operation of the dosing device, and at the same time properly solves the problem of blockage in the dosing pipes; the overall structure is streamlined, the operation is simple, and the practicability is strong.

[0032] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a pipeline connection diagram of the utility model.

[0034] Figure 2 This is a pipeline connection diagram of the utility model.

[0035] Figure 3 It is a schematic diagram of the structure of the solution tank.

[0036] Figure 4 A top sectional view of the solution tank.

[0037] In the figure:

[0038] 1. Stirring motor; 2. Stirring blade; 3. Spoiler; 4. Magnetic flap level gauge; 5. Dosing pump;

[0039] f1, grey water pipe; f2, electric ball valve; f3, manual ball valve; f4, Y-type filter; f5, pulse damper; f6, pressure gauge; f7, back pressure valve; f8, electromagnetic flowmeter; f9, safety valve; f10, dosing pipe; f11, dilution device; f12, backwash pipeline. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0041] Reference Figure 1-4 The invention discloses an improved dosing device and a fully automatic control system for a municipal sewage treatment plant, comprising a solution tank, a PLC control cabinet, and a dosage detection component arranged in a dosing tank of the sewage treatment plant.

[0042] The dosage detection component is set according to the type of drug to be added. For example, taking sodium hypochlorite dosing as an example; the agent dosing pool is the sodium hypochlorite dosing pool of the sewage treatment plant, and a residual chlorine meter is installed in the pool to transmit the residual chlorine content to the PLC control cabinet in real time; the PLC control cabinet adjusts the working frequency of the sodium hypochlorite dosing device in real time according to the residual chlorine content to achieve the degree of automatic operation.

[0043] In some embodiments, the drug outlet 11 of the solution tank is connected to the inlet of the dosing pump 5, and the dosing pump 5 is adjusted in real time through a PLC control cabinet; at the same time, the outlet of the dosing pump 5 is respectively connected to the reflux pipeline and the dilution pipeline.

[0044] Specifically, the dilution pipeline is provided with a dilution device f11, which is a container in the form of a dilution chamber, a dilution cylinder, etc.; the dilution water inlet of the dilution device f11 is connected to the reclaimed water pipe f1, which is used to add reclaimed water and dilute the drug solution to match the actual dosing needs; at the same time, the outlet of the dilution device f11 is connected to the drug dosing tank through the dosing pipe f10.

[0045] Furthermore, an electromagnetic flowmeter f8 is provided at the inlet end of the dilution device f11 to measure the flow rate in real time; when it deviates from the working flow rate of the dosing pump 5, part of the drug solution flows back to the solution tank through the reflux pipeline; based on its deviation value, it can be judged that the pipeline is blocked.

[0046] At the same time, a magnetic flap level meter 4 is provided on the solution tank; the magnetic flap level meter 4, the electromagnetic flow meter f8, the dosing pump 5, and the dosage detection component are communicatively connected to the PLC control cabinet; the current solution tank liquid level change is obtained according to the electrical signal of the magnetic flap level meter 4, and the dosing and water replenishment in the solution tank are controlled in combination with the pumping volume of the dosing pump 5 and the metering of the electromagnetic flow meter f8.

[0047] It should be noted that the dosing pump 5 is a variable frequency dosing pump, which can adjust its operating frequency and flow rate in real time; the motor inverter and electromagnetic flowmeter f8 on the variable frequency dosing pump are connected to the PLC control cabinet; the PLC control cabinet is a small industrial computer, which can receive measurement signals from various instruments or external artificial electrical signals, perform corresponding operations according to the operating relationship set in the program, and output the operation results to various valves, motors, etc. for corresponding work.

[0048] It is understandable that a manual ball valve f3 is provided on the pipeline of the medicine outlet 101; it is usually in an open state and is closed during maintenance.

[0049] In some embodiments, a Y-type filter f4 is provided at the inlet end of the dosing pump 5 to remove impurities in the drug solution.

[0050] In some embodiments, the inlet end of the dilution device f11 is provided with: a pulse damper f5, a manual ball valve f3, a pressure gauge f6, a back pressure valve f7, and an electromagnetic flow meter f8 in sequence along the direction of the dosing water flow.

[0051] In some embodiments, the reflux pipeline is connected to the reflux port 12 of the solution tank; accordingly, a safety valve f9 and a manual ball valve f3 are provided on the reflux pipeline.

[0052] In some embodiments, the drug outlet 11 of the solution tank is connected in parallel to the inlets of multiple drug adding pumps 5 through branch pipes.

[0053] like Figure 2 As shown, a multi-channel dosing pump 5 can be provided for coordinated operation.

[0054] Correspondingly, a manual ball valve f3 is provided on each branch pipe to control the on-off of each route respectively.

[0055] In some embodiments, the overflow port 13 and the drain port 14 of the solution tank are connected to a drain pipe through an overflow pipe and a drain pipe respectively, and the drain pipe is connected to the factory drainage network.

[0056] Preferably, the overflow pipe is connected downwardly to the drain pipe and then to the drain pipe.

[0057] It can be understood that a manual ball valve f3 is provided at the drain port 14 .

[0058] In some embodiments, the medium water inlet 15 of the solution tank is connected to the medium water pipe f1 for adding water into the solution tank.

[0059] Correspondingly, the middle water inlet 15 is provided with an electric ball valve f2, and the electric ball valve f2 is communicatively connected to the PLC control cabinet to realize automatic water adding operation.

[0060] In some embodiments, a backwashing pipeline f12 is further provided between the reclaimed water pipe f1 and the dosing pipe f10; correspondingly, a high-pressure pump is provided on the backwashing pipeline f12.

[0061] like Figure 1 , 2 As shown; a manual valve f3 is provided near the end of the dosing pipe f10; when backwashing is required, it is closed; high-pressure water is reversely delivered to the dosing pipe f10 through the backwashing pipeline f12 to flush the pipeline.

[0062] It should be noted that all the manual ball valves f3 in the aforementioned embodiments can be replaced by electric ball valves f2; and unified control is performed through a PLC control cabinet to further enhance the overall degree of automation.

[0063] In some embodiments, a stirring motor 1 is disposed on the top of the solution tank, and a stirring blade 2 is disposed on the output shaft of the stirring motor 1 extending downward; a spoiler 3 is disposed on the inner wall of the solution tank.

[0064] Wherein, the stirring blade 2 is provided with multiple layers; Figure 3 As shown, three layers of stirring blades are configured; preferably, the structure of the stirring blade 2 adopts a large-area circular impeller; in conjunction with the spoiler 3, the solid medicine is more fully dissolved and the dissolution time is reduced.

[0065] Preferably, the spoiler 3 is an inclined plate inclined downwardly inwardly.

[0066] At the same time, the magnetic flap level gauge transmits the liquid level in real time, and can automatically alarm and replenish the agent when the liquid level is low; preferably, the solution tank is installed on the mounting plate.

[0067] In addition, a drug outlet 11, a reflux port 12, a medium water port 15, and a drug adding port 16 are arranged on the top of the solution tank; an overflow port 13 and an emptying port 14 are arranged on the side of the solution tank.

[0068] In the utility model, the process equipment is streamlined, and each component cooperates with each other to form a complete fully automatic dosing system. Taking the PAC and PAM dosing devices as an example, the motor inverter and electromagnetic flowmeter f8 on the variable frequency dosing pump are connected to the PLC control cabinet; the PLC control cabinet receives the real-time flow of the sewage plant's influent, performs corresponding calculations according to the operating relationship set in the program, and outputs the calculation results to the variable frequency dosing pump to determine the dosing flow. Taking the sodium hypochlorite dosing device as an example, a residual chlorine meter is installed in the sodium hypochlorite dosing pool of the sewage plant to transmit the residual chlorine content to the PLC control cabinet in real time. The PLC control cabinet adjusts the working frequency of the sodium hypochlorite dosing device metering pump in real time according to the residual chlorine content to achieve the degree of automated operation.

[0069] In the utility model, in order to solve the problem that the concentration of the original solution of the medicine is inconsistent with the actual required concentration, a dilution device f11 is added; by setting the program in the PLC control cabinet, the dilution device can be controlled to inject water into the dosing pipe in proportion to adjust the concentration of the medicine, which is highly practical.

[0070] In the utility model, in order to solve the problem of blockage in the dosing pipeline, a strong backwash device (backwash pipeline f12) is added to the pipeline system; when the PLC control cabinet detects that the deviation between the working flow of the dosing pump and the real-time flow of the electromagnetic flowmeter is greater than 10%, the strong backwash mode is turned on, and the reclaimed water is used by the high-pressure pump to reversely backwash the dosing pipeline.

[0071] In the utility model, a new design is made in terms of drug dissolution efficiency, self-cleaning of the drug dosing pipeline, and automatic control of the drug dosing system, which is more efficient and convenient for the operation and management of the municipal sewage treatment plant; it can fully and quickly dissolve the drug and solve the problem of long drug dissolution time; the supporting intelligent system realizes the full automatic operation of the drug dosing device, and at the same time the problem of blockage of the drug dosing pipeline is properly solved; the overall structure is streamlined, the operation is simple, and the practicability is strong.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An improved dosing device and fully automatic control system for a municipal sewage plant, comprising a solution tank, a PLC control cabinet, and a dosage detection component arranged in a dosing tank; characterized in that: The drug outlet (11) of the solution tank is connected to the inlet of the drug dosing pump (5), and the outlet of the drug dosing pump (5) is connected to the reflux pipeline and the dilution pipeline respectively; The dilution pipeline is provided with a dilution device (f11), the dilution water inlet of the dilution device (f11) is connected to the reclaimed water pipe (f1); the outlet of the dilution device (f11) is connected to the reagent dosing tank through the dosing pipe (f10); The inlet end of the dilution device (f11) is provided with an electromagnetic flowmeter (f8); the solution tank is provided with a magnetic flap level meter (4); the magnetic flap level meter (4), the electromagnetic flowmeter (f8), the dosing pump (5), and the dosage detection component are communicatively connected to the PLC control cabinet.

2. The improved dosing device and fully automatic control system for municipal sewage treatment plants according to claim 1 is characterized in that: The inlet end of the dosing pump (5) is provided with a Y-type filter (f4).

3. The improved dosing device and fully automatic control system for municipal sewage treatment plants according to claim 1 is characterized in that: The inlet end of the dilution device (f11) is provided with: a pulse damper (f5), a pressure gauge (f6), a back pressure valve (f7), and an electromagnetic flow meter (f8) in sequence along the direction of the dosing water flow.

4. The improved dosing device and fully automatic control system for a municipal sewage treatment plant according to claim 1 is characterized in that: The reflux pipeline is connected to the reflux port (12) of the solution tank; A safety valve (f9) is provided on the return pipeline.

5. The improved dosing device and fully automatic control system for municipal sewage treatment plants according to claim 1 is characterized in that: The drug outlet (11) of the solution tank is connected in parallel to the inlets of a plurality of drug adding pumps (5) via branch pipes.

6. The improved dosing device and fully automatic control system for municipal sewage treatment plants according to claim 1 is characterized in that: The overflow port (13) and the drain port (14) of the solution tank are connected to the drain pipe via an overflow pipe and a drain pipe respectively.

7. The improved dosing device and fully automatic control system for a municipal sewage treatment plant according to claim 1 is characterized in that: The medium water inlet (15) of the solution tank is connected to the medium water pipe (f1); The middle water inlet (15) is provided with an electric ball valve (f3), and the electric ball valve (f3) is communicatively connected to the PLC control cabinet.

8. The improved dosing device and fully automatic control system for municipal sewage treatment plants according to claim 1 is characterized in that: A backwash pipeline is also provided between the intermediate water pipe (f1) and the dosing pipe (f10); A high-pressure pump is arranged on the backwash pipeline.

9. The improved dosing device and fully automatic control system for municipal sewage treatment plants according to any one of claims 1 to 8, characterized in that: A stirring motor (1) is arranged on the top of the solution tank, and a stirring blade (2) is arranged on the output shaft of the stirring motor (1) extending downward; The inner wall of the solution tank is provided with a spoiler (3).

10. The improved dosing device and fully automatic control system for a municipal sewage treatment plant according to claim 9 is characterized in that: The spoiler (3) is an inclined plate arranged to be inclined downwardly and inwardly.

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