Water quality stabilizing system for wastewater treatment

Abstract

The utility model discloses a water quality stabilizing system for wastewater treatment, which comprises a water inlet, a water outlet, an adsorption unit, a water passing unit and a control unit, the adsorption unit is connected with the water passing unit in parallel, the control unit is connected with the adsorption unit and the water passing unit in series, and the control unit comprises a refractive index monitor and a controller. The refractive index monitor is used for monitoring the refractive index of water discharged from the adsorption unit and / or the water passing unit on line and feeding back the refractive index to the controller, and the controller is used for regulating and controlling the flow ratio of the water discharged from the adsorption unit to the water discharged from the water passing unit. According to the water quality stabilizing system disclosed by the utility model, the control unit and the adsorption unit and the water passing unit which are connected in parallel are arranged, and the mixing ratio of water discharged by the adsorption unit to water discharged by the water passing unit is controlled, so that the final pollutant concentration in the effluent is kept within a controllable range, and the stability of the quality of the effluent at the rear end is ensured; the risk that the water quality exceeds the standard is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment devices, and particularly relates to a water quality stabilization system for wastewater treatment. Background Art

[0002] Existing sewage treatment facilities control the total amount of pollutants entering the biochemical treatment system by adjusting the water inflow, so as to achieve relatively stable operation of the system. However, when dealing with incoming water with high concentration and large water volume, the foregoing control method lacks effective management and control, and will also cause the incoming water to not be consumed in time, resulting in the situation of exceeding the water quality standard, and ultimately causing the front-end production equipment to be unable to produce. Content of the Utility Model

[0003] In view of this, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a water quality stabilization system for wastewater treatment, which can ensure that the concentration of pollutants in the effluent is within the tolerable range of the system, and there will be no large water quality changes, so as to achieve the stability of the influent water quality of the system.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A water quality stabilization system for wastewater treatment includes a water inlet, a water outlet, an adsorption unit, a water passing unit and a control unit. The adsorption unit is connected in parallel with the water passing unit, and the control unit is connected in series with both the adsorption unit and the water passing unit. The control unit includes a refractive index monitor and a controller. The refractive index monitor is used to on-line monitor the refractive index of the water discharged from the adsorption unit and / or the water passing unit and feed back the refractive index to the controller. The controller is used to adjust the flow ratio of the water discharged from the adsorption unit to the water discharged from the water passing unit.

[0006] By setting the parallel-connected adsorption unit and water passing unit, and setting the control unit, the effluent is on-line monitored by the refractive index monitor to test the content of target organic substances in the water. Through the linkage control between the refractive index monitor and the controller of the mixing ratio of the water discharged from the adsorption unit to the water discharged from the water passing unit, the concentration of pollutants in the final effluent is kept within a controllable range, so as to ensure the stability of the effluent water quality.

[0007] According to some preferred implementation aspects of the present utility model, the adsorption unit includes a first adsorption column, a second adsorption column, a first valve, a second valve, a third valve, and a fourth valve. A first pipeline is provided at the inlet of the first adsorption column, and a second pipeline is provided at the outlet of the first adsorption column. A third pipeline is provided at the inlet of the second adsorption column, and a fourth pipeline is provided at the outlet of the second adsorption column. In some embodiments of the present utility model, two adsorption columns are provided, and the second adsorption column is used as a backup. Moreover, the first adsorption column and the second adsorption column can be switched between series connection and parallel connection. Under normal circumstances, only the first adsorption column can be used to adsorb and treat the wastewater. When the adsorption capacity of the first adsorption column decreases, the first adsorption column and the second adsorption column can be connected in series by controlling the valves, that is, the effluent after adsorption treatment by the first adsorption column flows into the second adsorption column for further treatment, and finally flows to the control unit. When the first adsorption column has reached the adsorption saturation state, it can be replaced. At this time, only the second adsorption column can be used to adsorb and treat the wastewater.

[0008] According to some preferred implementation aspects of the present utility model, the first valve is located on the first pipeline, the second valve is located on the second pipeline, the third valve is located on the third pipeline, and the fourth valve is located on the fourth pipeline.

[0009] According to some preferred implementation aspects of the present utility model, one end of the fourth pipeline away from the second adsorption column is connected to the second pipeline.

[0010] According to some preferred implementation aspects of the present utility model, the water passing unit includes a water passing pipeline and a fifth valve provided on the water passing pipeline. The water passing pipeline is used to circulate the wastewater that has not been treated by the adsorption unit.

[0011] According to some preferred implementation aspects of the present utility model, one end of the first pipeline away from the first adsorption column is connected to the water passing pipeline, and one end of the third pipeline away from the second adsorption column is connected to the water passing pipeline.

[0012] According to some preferred implementation aspects of the present utility model, the control unit further includes a fifth pipeline. One end of the fifth pipeline is connected to the refractive index monitor, and a three-way valve is provided between the other end of the fifth pipeline and one end of the water passing pipeline away from the water inlet and one end of the second pipeline away from the first adsorption column.

[0013] According to some preferred implementation aspects of the present utility model, the controller is electrically connected to the refractive index monitor, and the second valve, the fourth valve, and the fifth valve are all electrically connected to the controller.

[0014] According to some preferred implementation aspects of the present utility model, the controller is used to regulate the opening degrees of the second valve and / or the fourth valve and the fifth valve, so that the DMF content in the water discharged from the water outlet is less than or equal to 1000 ppm. By detecting the refractive index of the discharged water through a refractive index monitor to calculate the solvent concentration, in some embodiments of the present utility model, through the linkage between the refractive index monitor and the controller, controlling the DMF content to be less than or equal to 1000 ppm can ensure the stability of the water quality of the discharged water.

[0015] According to some preferred implementation aspects of the present utility model, the water inlet is located upstream of the connection between the first pipeline and the water passing pipeline and the connection between the third pipeline and the water passing pipeline, and the water outlet is located downstream of the refractive index monitor.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: A water quality stabilization system for wastewater treatment of the present utility model, by setting an adsorption unit and a water passing unit in parallel and a control unit, enables the discharged water to be on-line monitored by a refractive index monitor to test the content of target organic matter in the water, and controls the mixing ratio of the water discharged from the adsorption unit and the water discharged from the water passing unit through the linkage between the refractive index monitor and the controller, so that the pollutant concentration in the final discharged water is kept within a controllable range, without restricting the water inflow at the water inlet, which is beneficial to ensuring the stability of the water quality of the rear-end discharged water and reducing the risk of water quality exceeding the standard. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a water quality stabilization system for wastewater treatment in a preferred embodiment of the present utility model.

[0019] Among them, the reference numerals are:

[0020] Adsorption unit - 1, first adsorption column - 10, second adsorption column - 11, first valve - 12, second valve - 13, third valve - 14, fourth valve - 15, first pipeline - 16, second pipeline - 17, third pipeline - 18, fourth pipeline - 19, water passing unit - 2, water passing pipeline - 21, fifth valve - 22, control unit - 3, refractive index monitor - 31, controller - 32, fifth pipeline - 33. Detailed Embodiments

[0021] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Referring to Figure 1 , the water quality stabilization system for wastewater treatment in this embodiment includes an inlet, an outlet, an adsorption unit 1, a water passing unit 2, and a control unit 3. The adsorption unit 1 is connected in parallel with the water passing unit 2, the control unit 3 is connected in series with the adsorption unit 1, the control unit 3 is also connected in series with the water passing unit 2, and the adsorption unit 1 is used for adsorbing and treating wastewater.

[0023] Furthermore, the adsorption unit 1 of this embodiment includes a first adsorption column 10, a second adsorption column 11, a first valve 12, a second valve 13, a third valve 14, and a fourth valve 15. A first pipeline 16 is provided at the inlet of the first adsorption column 10, a second pipeline 17 is provided at the outlet of the first adsorption column 10, a third pipeline 18 is provided at the inlet of the second adsorption column 11, and a fourth pipeline 19 is provided at the outlet of the second adsorption column 11. The first valve 12 is located on the first pipeline 16, the second valve 13 is located on the second pipeline 17, the third valve 14 is located on the third pipeline 18, and the fourth valve 15 is located on the fourth pipeline 19 and the end of the fourth pipeline 19 away from the second adsorption column 11 is connected to the second pipeline 17. By controlling the opening and closing of the first valve 12, the second valve 13, the third valve 14, and the fourth valve 15, the series-parallel switching between the first adsorption column 10 and the second adsorption column 11 can be realized, so that the adsorption unit 1 can choose to use the first adsorption column 10 alone, use the second adsorption column 11 alone, or use the first adsorption column 10 and the second adsorption column 11 simultaneously according to the actual situation.

[0024] Furthermore, the water passing unit 2 includes a water passing pipeline 21 and a fifth valve 22 provided on the water passing pipeline 21, and the water passing pipeline 21 is used for flowing wastewater that has not been treated by the adsorption unit 1. Among them, the end of the first pipeline 16 away from the first adsorption column 10 is connected to the water passing pipeline 21, and the end of the third pipeline 18 away from the second adsorption column 11 is also connected to the water passing pipeline 21; the inlet of the entire water quality stabilization system is located upstream of the connection between the first pipeline 16 and the water passing pipeline 21 and the connection between the third pipeline 18 and the water passing pipeline 21.

[0025] Further, the control unit 3 includes a refractive index monitor 31, a controller 32, and a fifth pipeline 33. One end of the fifth pipeline 33 is connected to the refractive index monitor 31, and a three-way valve is provided between the other end of the fifth pipeline 33 and the end of the water passing pipeline 21 away from the water inlet and the end of the second pipeline 17 away from the first adsorption column 10; the water outlet is located downstream of the refractive index monitor 31.

[0026] The controller 32 is electrically connected to the refractive index monitor 31, and the second valve 13, the fourth valve 15, and the fifth valve 22 are all electrically connected to the controller 32. The refractive index monitor 31 is used to online monitor the refractive index of the water discharged from the adsorption unit 1 and / or the water passing unit 2 and feedback the refractive index to the controller 32. After receiving the refractive index signal, the controller 32 will calculate the DMF content in the water according to the refractive index. If the DMF content is greater than 1000 ppm, the controller 32 will adjust the opening degrees of the second valve 13 and the fifth valve 22, the opening degrees of the fourth valve 15 and the fifth valve 22, or the opening degrees of the second valve 13, the fourth valve 15, and the fifth valve 22, so as to control the flow ratio of the water discharged from the adsorption unit 1 and the water discharged from the water passing unit 2, so as to control the DMF content to be less than or equal to 1000 ppm, and finally ensure the stability of the effluent quality and reduce the risk of water quality exceeding the standard.

[0027] The working process of the water quality stabilization system of this embodiment is described as follows:

[0028] After the wastewater enters from the water inlet, it is directly discharged through the water passing pipeline 21 first. The effluent is online and real-time monitored by the refractive index monitor 31. If it is detected that the refractive index of the effluent is relatively high (the DMF content in the converted effluent is greater than 1000 ppm), the first valve 12 and / or the third valve 14 are opened, so that part of the wastewater enters the adsorption unit 1 for adsorption treatment. After adsorption, the pollutant concentration in the wastewater is greatly reduced. After calculating the theoretical water passing ratio according to the built-in program and parameters of the controller 32, the opening degrees of the second valve 13 and / or the fourth valve 15 and the fifth valve 22 are adjusted, so that the refractive index of the effluent is within the normal range, and then they can be mixed and discharged.

[0029] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A water quality stabilization system for wastewater treatment, characterized in that, It includes a water inlet, a water outlet, an adsorption unit, a water passing unit and a control unit. The adsorption unit is connected in parallel with the water passing unit, and the control unit is connected in series with both the adsorption unit and the water passing unit. The control unit includes a refractive index monitor and a controller. The refractive index monitor is used to on-line monitor the refractive index of the water discharged from the adsorption unit and / or the water passing unit and feed back the refractive index to the controller. The controller is used to regulate the flow ratio of the water discharged from the adsorption unit to the water discharged from the water passing unit.

2. The water quality stabilization system according to claim 1, characterized in that, The adsorption unit includes a first adsorption column, a second adsorption column, a first valve, a second valve, a third valve and a fourth valve. A first pipeline is arranged at the inlet of the first adsorption column, and a second pipeline is arranged at the outlet of the first adsorption column. A third pipeline is arranged at the inlet of the second adsorption column, and a fourth pipeline is arranged at the outlet of the second adsorption column.

3. The water quality stabilization system according to claim 2, characterized in that, The first valve is located on the first pipeline, the second valve is located on the second pipeline, the third valve is located on the third pipeline, and the fourth valve is located on the fourth pipeline.

4. The water quality stabilization system according to claim 2, wherein One end of the fourth pipeline away from the second adsorption column is connected to the second pipeline.

5. The water quality stabilization system according to claim 2, wherein, The water passing unit includes a water passing pipeline and a fifth valve arranged on the water passing pipeline. The water passing pipeline is used to circulate the wastewater that has not been treated by the adsorption unit.

6. The water quality stabilization system according to claim 5, wherein, One end of the first pipeline away from the first adsorption column is connected to the water passing pipeline, and one end of the third pipeline away from the second adsorption column is connected to the water passing pipeline.

7. The water quality stabilization system according to claim 5, characterized in that, The control unit further includes a fifth pipeline. One end of the fifth pipeline is connected to the refractive index monitor. A three-way valve is arranged between the other end of the fifth pipeline and the end of the water passing pipeline away from the water inlet and the end of the second pipeline away from the first adsorption column.

8. The water quality stabilization system according to claim 7, characterized in that, The controller is electrically connected to the refractive index monitor, and the second valve, the fourth valve and the fifth valve are all electrically connected to the controller.

9. The water quality stabilization system according to claim 8, wherein, The controller is used to regulate the opening degrees of the second valve and / or the fourth valve and the fifth valve so that the DMF content in the water discharged from the water outlet is less than or equal to 1000 ppm.

10. The water quality stabilization system according to claim 7, wherein, The water inlet is located upstream of the connection between the first pipeline and the water passing pipeline and the connection between the third pipeline and the water passing pipeline, and the water outlet is located downstream of the refractive index monitor.

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