Intelligent dosing device for removing fluorine from waste water at tail end of power plant

Abstract

The utility model provides an intelligent dosing device for defluorination of waste water at the tail end of a power plant, which relates to the technical field of waste water treatment and sequentially comprises an adjusting tank, a first pipeline mixer, a coagulating basin, a second pipeline mixer and a flocculation basin according to a waste water passing sequence, meanwhile, the on-line flowmeter, the first on-line pH meter, the fluorine ion on-line detector and the second on-line pH meter are arranged and used for measuring wastewater data and transmitting the wastewater data to the intelligent control system, and then the intelligent control system regulates and controls the dosing amount according to the transmitted wastewater data, so that the purpose of intelligent dosing is achieved, and reaction conditions are effectively controlled. According to the utility model, the technical problem that the automatic dosing system in the prior art cannot control the reaction condition and flocculation reaction of the fluorine removal agent is solved, and the technical effects of effectively improving the use efficiency of the fluorine removal agent, avoiding the shortage or excess of the fluorine removal agent, and being good in fluorine removal effect and good in flocculation treatment are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an intelligent dosing device for defluoridating wastewater at the end of a power plant. Background Art

[0002] The prior art (CN202010128235.4) discloses an automatic dosing system for defluorinating agents, including: two online fluorine ion meters for analyzing the fluoride ion concentration in sewage before and after the addition of liquid defluorinating agents; a flow meter for measuring the amount of fluorine-containing sewage; a defluorinating agent storage tank for storing defluorinating agents, connected to a variable frequency dosing pump through a pipeline; a PLC controller for receiving the output signals of the online fluorine ion meter and the flow meter and outputting control signals; a touch screen for displaying, setting and modifying parameters of the PLC controller; and a variable frequency dosing pump for adjusting the dosage of the liquid defluorinating agent according to the control signal of the PLC controller. However, the above-mentioned automatic dosing system for defluorinating agents does not control the reaction conditions of the defluorinating agent, such as pH value and reaction time, and does not further explain the subsequent treatment process, such as the addition of flocculants.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model aims to provide an intelligent dosing device for defluoridating wastewater at the end of a power plant, which solves the technical problem that the automatic dosing system in the prior art cannot control the reaction conditions of the defluoridating agent and the flocculation reaction.

[0005] The intelligent dosing device for defluorination of wastewater at the end of a power plant provided by the utility model comprises a regulating tank, a first pipeline mixer, a coagulation tank, a second pipeline mixer and a flocculation tank in the order in which the wastewater passes;

[0006] An online flow meter and a first online pH meter are provided between the regulating tank and the first pipeline mixer, wherein the online flow meter is used to measure the wastewater inlet flow rate and transmit it to the intelligent control system, and the first online pH meter is used to measure the wastewater inlet pH value and transmit it to the intelligent control system, and the intelligent control system regulates the dosage of acid or alkali in the first pipeline mixer according to the inlet flow rate and the inlet pH value;

[0007] An online fluoride ion detector is provided between the first pipeline mixer and the coagulation tank, and the online fluoride ion detector is used to measure the fluoride ion content in the wastewater and transmit it to the intelligent control system, and the intelligent control system regulates the dosage of the defluoridation agent in the coagulation tank according to the fluoride ion content and the water volume;

[0008] A second online pH meter is provided between the coagulation tank and the second pipeline mixer. The second online pH meter is used to measure the pH value after the defluorination reaction and transmit it to the intelligent control system. The intelligent control system adjusts the amount of acid or alkali added in the second pipeline mixer according to the pH value after the defluorination reaction.

[0009] Furthermore, the flocculation tank regulates the dosage of the flocculant through an intelligent control system.

[0010] Furthermore, a stirring device is provided in the flocculation tank to allow the flocculant and sewage to be fully mixed and reacted.

[0011] Furthermore, a sludge hopper is provided at the tail of the flocculation tank to allow the fluoride-containing sludge to sink into the sludge hopper.

[0012] Furthermore, the fluoride-containing sludge in the sludge hopper is lifted to the sludge thickening tank by a sludge lifting pump.

[0013] Furthermore, the flocculation tank is connected to the biochemical tank so that the water treated in the flocculation tank can enter the biochemical tank for reaction.

[0014] Furthermore, a stirring device is provided in the coagulation tank to allow the defluorination agent and the wastewater to be fully mixed and reacted.

[0015] Furthermore, the intelligent control system regulates the dosage of the drug by controlling the flow rate of the drug delivery pump.

[0016] Furthermore, the regulating tank, the first pipeline mixer, the coagulation tank and the second pipeline mixer are independently connected through pipelines.

[0017] Furthermore, the online flow meter, the first online pH meter, the online fluoride ion detector and the second online pH meter are all independently arranged on the pipeline.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides an intelligent dosing device for defluoridation of wastewater at the end of a power plant, which includes a regulating tank, a first pipeline mixer, a coagulation tank, a second pipeline mixer and a flocculation tank in the order in which the wastewater passes; an online flow meter, a first online pH meter, an online fluoride ion detector and a second online pH meter are also provided to measure wastewater data and transmit them to the intelligent control system, which then adjusts the dosage of the corresponding agent according to the transmitted wastewater data, thereby achieving the purpose of intelligent dosing and effectively controlling the reaction conditions of each treatment stage. The utility model solves the technical problem that the automatic dosing system in the prior art cannot control the reaction conditions of the defluoridation agent and the flocculation reaction, and achieves the technical effects of effectively improving the use efficiency of the defluoridation agent, avoiding insufficient or excessive defluoridation agent, achieving good defluorination effect and good flocculation treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of an intelligent dosing device for defluoridating wastewater at the end of a power plant provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides an intelligent dosing device for defluoridation of wastewater at the end of a power plant, which comprises a regulating tank, a first pipeline mixer, a coagulation tank, a second pipeline mixer and a flocculation tank in the order in which the wastewater passes;

[0024] An online flow meter and a first online pH meter are provided between the regulating tank and the first pipeline mixer. The online flow meter is used to measure the wastewater inlet flow rate and transmit it to the intelligent control system. The first online pH meter is used to measure the wastewater inlet pH value and transmit it to the intelligent control system. The intelligent control system adjusts the dosage of acid or alkali in the first pipeline mixer according to the inlet flow rate and the inlet pH value.

[0025] An online fluoride ion detector is provided between the first pipeline mixer and the coagulation tank. The online fluoride ion detector is used to measure the fluoride ion content in the wastewater and transmit it to the intelligent control system. The intelligent control system adjusts the dosage of the defluoridation agent in the coagulation tank according to the fluoride ion content and the water volume;

[0026] A second online pH meter is provided between the coagulation tank and the second pipeline mixer. The second online pH meter is used to measure the pH value after the defluorination reaction and transmit it to the intelligent control system. The intelligent control system adjusts the amount of acid or alkali added in the second pipeline mixer according to the pH value after the defluorination reaction.

[0027] The intelligent dosing device provided by the utility model adjusts the dosage of the corresponding reagents in each treatment stage according to the transmitted wastewater data through the intelligent control system, which not only fully realizes the purpose of intelligent dosing, but also can effectively control the reaction conditions of each treatment stage, and solves the technical problem that the automatic dosing system in the prior art cannot control the reaction conditions and flocculation reaction of the defluorinating agent, and achieves the technical effects of effectively improving the use efficiency of the defluorinating agent, avoiding insufficient or excessive defluorinating agent, and achieving good defluorination effect and flocculation treatment.

[0028] In a preferred embodiment, the regulating tank, the first pipeline mixer, the coagulation tank and the second pipeline mixer can be independently connected by pipelines; wherein the online flow meter, the first online pH meter, the fluoride ion online detector and the second online pH meter can be independently arranged on the pipeline.

[0029] The operation process of the intelligent dosing device provided by the utility model includes the following steps:

[0030] (a) The wastewater first enters the regulating tank for homogenization and equalization, and then enters the first pipeline mixer through the pipeline. At the same time, the online flow meter and the first online pH meter arranged on the pipeline respectively measure the pipeline inlet flow rate and the inlet pH value, and transmit the inlet flow rate and the inlet pH value to the intelligent control system. The intelligent control system then adjusts the amount of acid or alkali added to the first pipeline mixer according to the inlet flow rate and the inlet pH value, so that the pH value of the wastewater in the first pipeline mixer is maintained between 8 and 9 (to achieve the best operating environment of the defluorination agent);

[0031] (b) The effluent from the first pipeline mixer enters the coagulation tank through the pipeline, and at the same time, the fluorine ion online detector installed on the pipeline measures the fluorine ion content in the wastewater, and transmits the fluorine ion content data to the intelligent control system, which then adjusts the amount of defluorinating agent added to the coagulation tank according to the fluorine ion content and the water volume, and at the same time can obtain the amount of defluorinating agent through feedback from the corresponding defluorinating agent flow meter, thereby avoiding insufficient or excessive addition of defluorinating agent, and a stirring device can be provided in the coagulation tank to enable the defluorinating agent to fully mix and react with the wastewater;

[0032] Among them, the retention time of the coagulation tank can be set to 8 to 12 minutes, which can ensure that the defluorination agent reacts thoroughly and avoids waste of agents; the addition ratio of the coagulation tank can be F - : Defluorination agent = 1: 0.03 ~ 0.05 mg / l;

[0033] (c) Since the pH value of the defluorination agent is relatively acidic, the pH value of the sewage will change after the defluorination agent is added for reaction. Therefore, the effluent from the coagulation tank enters the second pipeline mixer through the pipeline. At the same time, the second online pH meter installed on the pipeline measures the pH value of the effluent from the coagulation tank and transmits the pH value of the effluent from the coagulation tank to the intelligent control system. The intelligent control system then adjusts the amount of acid or alkali added to the second pipeline mixer according to the pH value of the effluent from the coagulation tank, so that the pH value of the sewage in the second pipeline mixer is maintained between 7 and 8, which is more convenient for the subsequent flocculation tank to carry out flocculation reaction.

[0034] In a preferred embodiment, the intelligent control system can regulate the dosage of the corresponding drug by controlling the flow rate of the corresponding drug delivery pump.

[0035] In a preferred embodiment, the flocculation tank can adjust the dosage of the flocculant through an intelligent control system; wherein, a stirring device can be provided in the flocculation tank to allow the flocculant and the sewage to be fully mixed and reacted.

[0036] The flocculant is added by an intelligent control system. The added flocculant can quickly precipitate the flocculated particles formed by the defluorination agent through adsorption and bridging effects. The stirring device installed in the flocculation tank can make the flocculant and sewage fully mixed and react. Among them, the residence time of the flocculation tank can be set to 10 to 15 minutes, which is more conducive to the full reaction of the flocculant.

[0037] In a preferred embodiment, a sludge hopper may be provided at the tail of the flocculation tank to allow the fluoride-containing sludge to sink into the sludge hopper; wherein the fluoride-containing sludge in the sludge hopper may be lifted to the sludge thickening tank by a sludge lifting pump.

[0038] A sludge hopper is provided at the tail of the flocculation tank, and the precipitated fluoride-containing sludge can sink into the sludge hopper and then be lifted to the sludge thickening tank by the sludge lifting pump for further treatment.

[0039] In a preferred embodiment, the flocculation tank can be connected to the biochemical tank, and the water treated in the flocculation tank then enters the biochemical tank for reaction.

[0040] Example 1

[0041] An intelligent dosing device for defluorination of wastewater at the end of a power plant, the schematic diagram of which is shown in Figure 1, including a regulating tank, a first pipeline mixer, a coagulation tank, a second pipeline mixer and a flocculation tank in the order in which the wastewater passes;

[0042] The regulating tank, the first pipeline mixer, the coagulation tank and the second pipeline mixer are connected by pipelines;

[0043] An online flow meter and a first online pH meter are provided on the pipeline between the regulating tank and the first pipeline mixer. The online flow meter is used to measure the wastewater inlet flow rate and transmit it to the intelligent control system. The first online pH meter is used to measure the wastewater inlet pH value and transmit it to the intelligent control system. The intelligent control system controls the dosing pump flow rate of the acid and alkali storage tank according to the inlet flow rate and the inlet pH value, thereby regulating the dosage of acid or alkali in the first pipeline mixer.

[0044] A fluoride ion online detector is provided on the pipeline between the first pipeline mixer and the coagulation tank. The fluoride ion online detector is used to measure the fluoride ion content in the wastewater and transmit it to the intelligent control system. The intelligent control system controls the flow rate of the dosing pump of the defluoridation agent storage tank according to the fluoride ion content and the water volume, thereby regulating the dosage of the defluoridation agent in the coagulation tank, and obtains the dosage through feedback from the corresponding flow meter to avoid insufficient or excessive defluoridation agent due to inaccurate dosing pumps;

[0045] A stirring device is provided in the coagulation tank to fully mix the defluorination agent with the wastewater. The retention time of the coagulation tank is set to 8 to 12 minutes to ensure that the defluorination agent can react completely and avoid waste of the agent.

[0046] A second online pH meter is provided on the pipeline between the coagulation tank and the second pipeline mixer. The second online pH meter is used to measure the pH value after the defluorination reaction and transmit it to the intelligent control system. The intelligent control system controls the flow rate of the dosing pump of the acid and alkali storage tank according to the pH value after the defluorination reaction, thereby regulating the dosage of the acid or alkali in the second pipeline mixer;

[0047] The flocculation tank uses an intelligent control system to regulate the dosage of flocculants, and the intelligent control system regulates the dosage of flocculants in the flocculation tank by controlling the flow rate of the dosing pump of the flocculant storage tank;

[0048] A stirring device is provided in the flocculation tank to allow the flocculant and sewage to fully mix and react. The retention time in the flocculation tank is set to 10 to 15 minutes to ensure that the flocculant fully reacts.

[0049] Example 2

[0050] This embodiment provides an intelligent dosing device for defluoridation of wastewater at the end of a power plant. The difference from Embodiment 1 is that a sludge hopper is provided at the tail of the flocculation tank to allow the fluoride-containing sludge to sink into the sludge hopper, and at the same time, the fluoride-containing sludge in the sludge hopper is lifted to the sludge thickening tank by a sludge lifting pump for treatment;

[0051] The rest are the same as in Example 1.

[0052] Example 3

[0053] This embodiment provides an intelligent dosing device for defluorination of wastewater at the end of a power plant. The difference from Embodiment 2 is that the flocculation tank is connected to the biochemical tank, and the water treated in the flocculation tank enters the biochemical tank for reaction;

[0054] The rest is the same as Example 2.

[0055] Comparative Example 1

[0056] This comparative example provides a dosing device, which is different from Example 1 in that an online flow meter and a first online pH meter are not provided on the pipeline between the regulating tank and the first pipeline mixer;

[0057] The rest are the same as in Example 1.

[0058] Compared with the intelligent dosing device of Example 1, this comparative example cannot realize intelligent regulation of the dosage of acid or alkali in the first pipeline mixer, which is not conducive to achieving the optimal reaction environment of the defluorination agent.

[0059] Comparative Example 2

[0060] This comparative example provides a dosing device, which is different from Example 1 in that no fluoride ion online detector is provided on the pipeline between the first pipeline mixer and the coagulation tank;

[0061] The rest are the same as in Example 1.

[0062] Compared with the intelligent dosing device of Example 1, this comparative example cannot accurately measure the fluoride ion content in the wastewater, and thus cannot timely adjust the dosage of the defluoridating agent in the coagulation tank. At the same time, insufficient or excessive addition of the defluoridating agent may occur, resulting in unsatisfactory defluoridation effect.

[0063] Comparative Example 3

[0064] This comparative example provides a dosing device, which differs from Example 1 in that no second online pH meter is provided on the pipeline between the coagulation tank and the second pipeline mixer;

[0065] The rest are the same as in Example 1.

[0066] Compared with the intelligent dosing device of Example 1, this comparative example cannot intelligently adjust the pH of the effluent from the coagulation tank to achieve the ideal reaction conditions required for flocculation, so it is not conducive to the smooth progress of the flocculation reaction.

[0067] In summary, the utility model sets an online flow meter and a first online pH meter on the pipeline to measure the inlet flow rate and the inlet pH value, and transmits them to the intelligent control system, thereby intelligently adjusting the dosage of the acid or alkali added to the first pipeline mixer, so that the pH value is maintained between 8 and 9, achieving the best operating environment of the defluoridation agent, and improving the use efficiency of the defluoridation agent; the utility model sets a fluoride ion online detector to accurately measure the fluoride ion content in the wastewater, and the intelligent control system adjusts the flow rate of the dosing pump of the fluoride ion storage tank according to the fluoride ion content and the water volume, and can timely adjust the dosage, and can obtain the dosage through the corresponding flow meter feedback. The amount of defluoridation agent can be adjusted according to the amount of the defluoridation agent, thereby avoiding the occurrence of insufficient or excessive addition of the defluoridation agent due to inaccurate dosing pump, and a stirring device is provided in the coagulation tank to enable the defluoridation agent and the wastewater to be fully mixed and reacted; in addition, the defluoridation agent is relatively acidic, causing the pH value after the defluoridation reaction to change, so the utility model arranges a second online pH meter on the pipeline, and arranges a second pipeline mixer to add medicine to adjust the pH between 7 and 8, which is more convenient for the flocculation reaction; after the flocculant is added, the flocculent particles formed by the defluoridation agent are quickly precipitated through the adsorption bridging effect, thereby completely removing the fluoride ions from the water, thereby improving the removal rate of the fluoride ions.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An intelligent dosing device for defluorination of wastewater at the end of a power plant, characterized in that: The wastewater sequentially includes a regulating tank, a first pipeline mixer, a coagulation tank, a second pipeline mixer and a flocculation tank; An online flow meter and a first online pH meter are provided between the regulating tank and the first pipeline mixer, wherein the online flow meter is used to measure the wastewater inlet flow rate and transmit it to the intelligent control system, and the first online pH meter is used to measure the wastewater inlet pH value and transmit it to the intelligent control system, and the intelligent control system regulates the dosage of acid or alkali in the first pipeline mixer according to the inlet flow rate and the inlet pH value; An online fluoride ion detector is provided between the first pipeline mixer and the coagulation tank, and the online fluoride ion detector is used to measure the fluoride ion content in the wastewater and transmit it to the intelligent control system, and the intelligent control system regulates the dosage of the defluoridation agent in the coagulation tank according to the fluoride ion content and the water volume; A second online pH meter is provided between the coagulation tank and the second pipeline mixer. The second online pH meter is used to measure the pH value after the defluorination reaction and transmit it to the intelligent control system. The intelligent control system adjusts the amount of acid or alkali added in the second pipeline mixer according to the pH value after the defluorination reaction.

2. The intelligent dosing device according to claim 1, characterized in that: The flocculation tank regulates the dosage of the flocculant through an intelligent control system.

3. The intelligent dosing device according to claim 2, characterized in that: The flocculation tank is provided with a stirring device to allow the flocculant and sewage to fully mix and react.

4. The intelligent dosing device according to claim 3, characterized in that: A sludge hopper is provided at the tail of the flocculation tank to allow the fluoride-containing sludge to sink into the sludge hopper.

5. The intelligent dosing device according to claim 4, characterized in that: The fluoride-containing sludge in the sludge hopper is lifted to the sludge thickening tank by a sludge lifting pump.

6. The intelligent dosing device according to claim 5, characterized in that: The flocculation tank is connected to the biochemical tank, and the water treated in the flocculation tank enters the biochemical tank for reaction.

7. The intelligent dosing device according to any one of claims 1 to 6, characterized in that: The coagulation tank is provided with a stirring device to fully mix and react the defluorination agent with the wastewater.

8. The intelligent dosing device according to any one of claims 1 to 6, characterized in that: The intelligent control system regulates the dosage of the medicine by controlling the flow rate of the medicine delivery pump.

9. The intelligent dosing device according to any one of claims 1 to 6, characterized in that: The regulating tank, the first pipeline mixer, the coagulation tank and the second pipeline mixer are independently connected through pipelines.

10. The intelligent dosing device according to claim 9, characterized in that: The online flow meter, the first online pH meter, the online fluoride ion detector and the second online pH meter are all independently arranged on the pipeline.

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