Electric flocculation sewage treatment system driven by wind power to generate power

Abstract

The utility model discloses an electric flocculation sewage treatment system driven by wind power to generate power. The sewage treatment system comprises a storage battery, a switched reluctance pulse generator system, a wind turbine, an electric flocculation device and a sewage circulating and separating system. The switched reluctance pulse generator system is used for outputting two paths of pulse electric energy, one path of pulse electric energy provides pulse voltage and current for the electric flocculation device, and the other path of pulse electric energy provides pulse current for the power supply system. The utility model provides an electric flocculation sewage treatment system driven by wind power to generate power, which solves the problems of high energy consumption and pole plate passivation of an electric flocculation system powered by direct current, can flexibly adapt to a sewage treatment repetition frequency pulse power generation working condition, and realizes long-time off-grid independent output of pulse electric energy of the system; through off-grid wind power generation, the demand of a power supply system for supplying power to an external power grid is reduced, the influence of new energy access on the power grid can be reduced, and the development trend of energy conservation, emission reduction and environmental protection is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wind driven power generation's electric flocculation sewage treatment system belongs to sewage treatment field. BACKGROUND

[0002] Electric flocculation technology is a kind of electrochemistry technology for sewage treatment, which is widely used, removes pollutants in water through flocculation, air floatation and oxidation-reduction, and is widely used in treating industrial wastewater, domestic sewage, drinking water and micro-polluted seawater, colority, grease, heavy metal and other pollutants.

[0003] At present, sewage treatment belongs to high energy consumption industry, and electric flocculation technology mainly uses direct current power supply, which has problems of high energy consumption and passivation of electrode plate caused by long-time power-on.

[0004] Wind energy is a common clean energy, and its development cost is low, so it is widely used in power supply field, and therefore wind power generation can be introduced into electric flocculation sewage treatment field to reduce energy consumption. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems that the prior art has shortcomings, provides a wind driven power generation's electric flocculation sewage treatment system, optimizes the problem of high energy consumption and passivation of electrode plate of direct current power supply electric flocculation system, can flexibly adapt to sewage treatment repeated frequency pulse power generation working condition, realizes long-time off-grid independent output pulse electric energy of system, reduces the demand of power supply system on external power grid power supply through off-grid wind power generation, and can reduce the influence of new energy access on power grid, meets the development trend of energy saving and emission reduction and green environmental protection.

[0006] In order to solve the above technical problems, the technical scheme of the utility model is:

[0007] The utility model provides a wind driven power generation's electric flocculation sewage treatment system, it includes battery, switch reluctance pulse generator system, wind turbine, electric flocculation device, sewage circulation and separation system;

[0008] The switch reluctance pulse generator system is used to output two-way pulse electric energy, one-way pulse electric energy provides pulse voltage and current to electric flocculation device, and the other way pulse electric energy provides pulse current to battery;

[0009] The wind turbine provides mechanical energy required for power generation for switch reluctance pulse generator system;

[0010] The electric flocculation device is used for removing pollutants in sewage;

[0011] The sewage circulation and separation system is used for circulating and separating sewage.

[0012] The battery is used for providing direct current power for the switched reluctance pulse generator system and the sewage circulation and separation system.

[0013] The switched reluctance pulse generator system comprises a switched reluctance generator, a double-channel pulse power main circuit and a control circuit, the wind turbine is connected with the switched reluctance generator, the switched reluctance generator is connected with the double-channel pulse power main circuit, the double-channel pulse power main circuit is connected with the metal electrode of the electric flocculation device and the battery respectively, and the control circuit is connected with the double-channel pulse power main circuit.

[0014] Further, the wind-driven electric flocculation sewage treatment system further comprises an AC / DC conversion power supply.

[0015] When the battery is insufficient in power and the switched reluctance pulse generator system is insufficient in output pulse power, the battery is charged by the AC / DC conversion power supply.

[0016] When the electric flocculation device stops working, the battery is charged by the switched reluctance pulse generator system.

[0017] Further, the double-channel pulse power main circuit adopts a double-tube flyback converter.

[0018] Further, the switched reluctance generator comprises a rotor and a stator, and a plurality of salient poles are arranged on the rotor and the stator.

[0019] Further, the wind turbine is connected with the rotor, and the wind turbine drives the rotor to rotate.

[0020] Further, the switched reluctance pulse generator system further comprises a position sensor, the position sensor is connected with the control circuit, the position sensor is installed on the rotor, and the position sensor feeds back a position signal of the rotor to the control circuit.

[0021] Further, the stator is provided with a primary excitation winding L1 and a secondary pulse winding L2, the primary excitation winding L1 and the secondary pulse winding L2 are arranged in a concentric manner, the primary excitation winding L1 and the secondary pulse winding L2 are arranged on the same salient pole of the stator, the primary excitation winding L1 is located in an inner layer, and the secondary pulse winding L2 is located in an outer layer of the primary excitation winding L1.

[0022] Further, the primary excitation winding L1 comprises two parallel excitation coil groups, and each excitation coil group comprises four series excitation coils.

[0023] Further, the secondary pulse winding L2 comprises eight parallel pulse coils.

[0024] Further, the sewage circulating and separating system comprises a motor driving system, a driving motor, a dirt separating device and a circulating water pump, the input end of the motor driving system is connected with a storage battery, the output end of the motor driving system is connected with the input end of the driving motor, the driving motor provides power for the circulating water pump, and the circulating water pump is used for pushing sewage to circulate and separate.

[0025] By adopting the technical scheme, the utility model has the following beneficial effects:

[0026] 1. The switch reluctance pulse generator system driven by wind power provided by the utility model provides pulse electric energy for the electric flocculation device, effectively optimizes the problems of large energy consumption and passivation of the polar plate when the direct current power supply is applied to the electric flocculation sewage treatment.

[0027] 2. The utility model adopts off-grid wind power generation, the switch reluctance pulse generator rotor is driven to rotate by the wind turbine, an additional prime mover is not needed to provide mechanical energy to the switch reluctance generator, and the switch reluctance pulse generator system can feed back electric energy to the storage battery. The system power supply has low demand for external power grid power supply, low operation cost, small influence of new energy access on the power grid, and meets the development trend of energy saving and emission reduction and green environmental protection.

[0028] 3. The utility model directly outputs pulse electric energy by the storage battery power supply when the wind turbine speed is low, converts magnetic energy and mechanical energy into pulse electric energy when the wind turbine speed is high, and outputs pulse electric energy from the switch reluctance pulse generator system to the power supply system to charge the storage battery when the electric flocculation sewage treatment stops, so that different pulse power generation conditions can be flexibly adapted.

[0029] 4. The utility model adopts the switch reluctance generator, has the advantages of simple and solid structure, strong fault tolerance and environmental adaptability, and flexible control. The utility model adopts the switch reluctance pulse generator system, and the stability and environmental adaptability of pulse power generation can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a principle block diagram of the electric flocculation sewage treatment system of the wind power driven power generation of the utility model;

[0031] Figure 2 It is a structure diagram of the double-winding single-phase 8 / 8 structure switch reluctance pulse generator of the utility model;

[0032] Figure 3 It is a connection schematic diagram of the double-channel pulse power main circuit and the double-winding of the utility model;

[0033] Figure 4The utility model discloses a wind driven power generation electric flocculation sewage treatment system's system composition block diagram.

[0034] Figure 5 The utility model discloses a wind driven power generation electric flocculation sewage treatment system's working method's flow chart.

[0035] Figure 6 The utility model discloses a switch reluctance pulse generator system's pulse power generation mode waveform schematic diagram.

[0036] Figure 7 The utility model discloses a switch reluctance pulse generator system's freewheeling mode waveform schematic diagram. DETAILED DESCRIPTION

[0037] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawing, the utility model is further detailed.

[0038] Embodiment one

[0039] As Figure 1 , 2 The utility model discloses a wind driven power generation electric flocculation sewage treatment system, it includes battery, switch reluctance pulse generator system, wind driven generator, electric flocculation device, sewage circulation and separation system.

[0040] Specifically, the battery is used for providing direct current energy Uin for the switch reluctance pulse generator system and the sewage circulation and separation system.

[0041] The wind driven generator provides the mechanical energy required for power generation for the switch reluctance pulse generator system, drives the switch reluctance pulse generator in the switch reluctance pulse generator system to rotate and generate electricity.

[0042] The switch reluctance pulse generator system converts magnetic energy and mechanical energy into two-way pulse electric energy output, one-way pulse electric energy provides pulse voltage Up1 and electric current Ip1 for the electric flocculation device, makes the sewage flocculate under the pulse discharge of the metal electrode of the electric flocculation device, has optimized the electrode plate passivation problem when direct current power supply, has improved sewage treatment efficiency.

[0043] The metal electrode of the electric flocculation device carries out pulse electric flocculation and is used for removing the pollutants in the sewage.

[0044] The sewage circulation and separation system is used for circulating and separating the sewage.

[0045] As Figure 1As shown, the wind-driven electric flocculation sewage treatment system of this embodiment also includes an AC / DC conversion power supply, the input end of which is connected to the AC mains, and the AC / DC conversion power supply converts the external AC mains into DC power.

[0046] When the battery is low and the pulse power output by the switched reluctance pulse generator system is insufficient, the AC-DC power supply charges the battery. When the battery is high and the pulse power output by the switched reluctance pulse generator system is sufficient, the AC-DC power supply does not contribute to the overall system power supply, thereby reducing the power demand from the external power grid.

[0047] When the electro-flocculation device stops working, the switched reluctance pulse generator system outputs pulse power to charge the battery. When the battery is fully charged, the battery provides DC power to the system when the electro-flocculation device next works, further reducing the power demand from the external power grid.

[0048] like Figure 1 As shown, the switched reluctance pulse generator system of this embodiment includes a switched reluctance generator, a dual-channel pulse power main circuit, a control circuit, and a position sensor. Specifically, the position sensor is connected to the control circuit, which is connected to the dual-channel pulse power main circuit, which is connected to the switched reluctance generator. The dual-channel pulse power main circuit is connected to the metal electrodes and battery of the electroflocculation device, respectively, and the wind turbine is connected to the switched reluctance generator.

[0049] The control circuit outputs control signals based on parameters such as sewage type and generator speed to control the on / off state of the power tubes in the dual-channel pulse power main circuit. When the power tubes are turned on, the windings are excited; when they are turned off, the freewheeling circuit is turned on, signaling the start of the pulse power generation phase. The control circuit adjusts the amplitude and frequency of the pulse voltage Up1 and current Ip1 by controlling parameters such as the turn-on angle, turn-off angle, duty cycle, and phase current chopping limit, flexibly adapting to various pulse power generation conditions.

[0050] like Figure 2 As shown, the switched reluctance generator of this embodiment includes a rotor and a stator, each of which is provided with multiple salient poles. The switched reluctance generator of this embodiment can be single-phase, two-phase, or multi-phase. The salient poles on the rotor and stator can adopt various stator and rotor salient pole tooth number combinations, such as 8 / 8, 6 / 4, and 12 / 8. In this embodiment, a single-phase 8 / 8 combination is preferred. The stator winding can be single-winding or dual-winding, with a dual-winding configuration being preferred in this embodiment.

[0051] Specifically, the stator of the embodiment is provided with a primary excitation winding L1 and a secondary pulse winding L2, and the primary excitation winding L1 and the secondary pulse winding L2 are arranged in a concentric manner. The primary excitation winding L1 and the secondary pulse winding L2 are wound on the same salient pole of the stator, the primary excitation winding L1 is located in the inner layer, the secondary pulse winding L2 is located in the outer layer of the primary excitation winding L1, and the two groups of windings are tightly coupled. The turn ratio of the primary excitation winding L1 and the secondary pulse winding L2 is set according to the voltage and load voltage ratio of the power supply, and the embodiment is selected as 18:150.

[0052] According to the voltage and current requirements of the specific pulse electrocoagulation, modifying the winding connection mode can change the voltage and current size of the pulse power generation mode output. As shown in Figure 3 , the primary excitation winding L1 of the embodiment is connected in 4 strings and 2 parallel, and the pulse winding is connected in 8 parallel. The primary excitation winding L1 includes two parallel excitation coil groups, and each excitation coil group includes four series excitation coils. The secondary pulse winding L2 includes eight parallel pulse coils.

[0053] As shown in Figure 3 , the double-channel pulse power main circuit of the embodiment can adopt different types of converters such as asymmetric half-bridge, C-dump, double-tube flyback, etc. The embodiment preferably adopts a double-tube flyback converter, and the topology has two power interfaces: one is connected to an input AC / DC conversion power supply or a storage battery, realizing bidirectional flow control of the switching reluctance pulse generator system excitation and power generation; the other is connected to the metal electrode pulse load of the electrocoagulation device, outputting pulse power energy.

[0054] Specifically, as shown in Figure 3 , the double-tube flyback converter includes a first excitation side power tube Q1, a second excitation side power tube Q2, a first excitation side freewheeling diode D1, a second excitation side freewheeling diode D2, and a pulse side diode D3.

[0055] As shown in Figure 3 , 4As shown in the figure, the specific connection mode of the switch reluctance pulse generator system of the embodiment is as follows: one end of the excitation winding L1 is connected with the drain of the second excitation side power tube Q2, the source of the second excitation side power tube Q2 is connected with the negative electrode of the storage battery, the positive electrode of the storage battery is connected with the drain of the first excitation side power tube Q1, and the source of the first excitation side power tube Q1 is connected with the other end of the excitation winding L1. The cathode of the first excitation side freewheeling diode D1 is connected with the source of the first excitation side power tube Q1, and the anode of the first excitation side freewheeling diode D1 is connected with the source of the second excitation side power tube Q2. The cathode of the second excitation side freewheeling diode D2 is connected with the drain of the first excitation side power tube Q1, and the anode of the second excitation side freewheeling diode D2 is connected with the drain of the second excitation side power tube Q2. The pulse winding L2 is coupled with the excitation winding L1 through the switch reluctance pulse generator, one end of the pulse winding L2 is connected with the cathode of the pulse side diode D3, the anode of the pulse side diode D3 is connected with one pole of the metal electrode of the electrocoagulation device, and the other pole of the metal electrode of the electrocoagulation device is connected with the other end of the pulse winding L2.

[0056] As shown in the figure, Figure 1 , 4 The rotor of the switch reluctance generator of the embodiment is connected with the wind turbine, and the rotor is driven to rotate by the wind turbine.

[0057] As shown in the figure, Figure 1 , 4 The position sensor of the embodiment is installed on the rotor, and the position sensor feeds back the position signal of the rotor to the control circuit.

[0058] As shown in the figure, Figure 1 , 4 The sewage circulation and separation system of the embodiment includes a motor driving system, a driving motor, a dirt separation device and a circulating water pump. The input end of the motor driving system is connected with the storage battery, the output end of the motor driving system is connected with the input end of the driving motor, the driving motor provides power for the circulating water pump, and the circulating water pump is used to push the sewage to circulate and separate.

[0059] Embodiment Two

[0060] The embodiment provides a working method of the electrocoagulation sewage treatment system driven by wind power, which comprises the following steps:

[0061] Step S1, the control circuit adjusts the control parameters (opening angle, closing angle, duty cycle, phase current chopping limit) of the double-channel pulse power main circuit in real time according to the change of the rotating speed of the rotor of the switch reluctance generator, drives the double-channel pulse power main circuit, and the double-channel pulse power main circuit controls the excitation and power generation of the switch reluctance generator in time.

[0062] Step S2, the battery provides direct current to the switched reluctance generator, the switched reluctance generator excitation. In the excitation phase, as shown in Figure 6 t0-t1 stage, the control circuit output control signal within the opening and closing angle control first excitation side power tube Q1 and the second excitation side power tube Q2 drive on. At this time, the excitation winding voltage is the power supply voltage, the input current Ip2 near linear rise; Pulse winding voltage is negative, the pulse side diode D3 makes the output voltage Up1 and output current Ip1 is zero.

[0063] Step S3, after the switched reluctance generator excitation end, into the pulse power stage, by the switched reluctance generator to the metal electrode of the electric flocculation device and the battery provides pulse power. In the pulse power stage, as shown in Figure 6 t1-t2 stage, the control circuit output control signal drive first excitation side power tube Q1 and the second excitation side power tube Q2 off. At this time, the output voltage Up1 is positive, the pulse side diode D3 is turned on, the excitation winding current coupling to the pulse winding, the switched reluctance pulse generator output pulse power to the metal electrode of the electric flocculation device.

[0064] In particular, if the wind is not enough, the wind turbine does not rotate or rotate at a lower speed, the switched reluctance generator output pulse current does not reach the electric flocculation device to carry on the pulse electric flocculation required current size, by the battery to the double channel pulse power main circuit power supply, the double channel pulse power main circuit directly output pulse current to the metal electrode of the electric flocculation device power supply.

[0065] If the wind is enough, the wind turbine speed is higher, the switched reluctance generator can send enough pulse power, then the double channel pulse power main circuit provides pulse power to the metal electrode of the electric flocculation device and the battery, the electric flocculation device works normally, at the same time, the battery is charged.

[0066] As shown in Figure 6 When the electric flocculation device stops working, the switched reluctance generator stops outputting pulse power, and the electric flocculation device enters the waiting stage. In the waiting stage shown in t2-t3, the input current Ip2, the output voltage Up1 and the output current Ip1 all drop to zero, waiting for the next working period.

[0067] Step S4, repeat steps S1-S3, enter the next working period.

[0068] In particular, as shown in Figure 7As shown, when the electric flocculation device fails to work normally, no pulse electric flocculation is performed, and the switched reluctance pulse generator system enters a freewheeling mode. In the excitation stage shown at t4-t5, the first excitation side power tube Q1 and the second excitation side power tube Q2 are turned on, and the battery provides excitation electric energy for the switched reluctance pulse generator; in the freewheeling stage shown at t5-t6, the first excitation side power tube Q1 and the second excitation side power tube Q2 are turned off, the output voltage Up1 is positive, due to the too small current coupled to the pulse winding, the pulse winding cannot release energy to the metal electrode, the output current Ip1 is zero, and the input current Ip2 is fed back to the battery through the first excitation side freewheeling diode D1 and the second excitation side freewheeling diode D2.

[0069] The above-described specific embodiments further specifically describe the technical problems solved by the utility model, technical solutions and beneficial effects, and it should be understood that the above-described specific embodiments are merely specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A wind-driven power generation electric flocculation sewage treatment system, characterized in that: It comprises a battery, a switched reluctance pulse generator system, a wind turbine, an electric flocculation device, a sewage circulation and separation system; The switched reluctance pulse generator system is used for outputting two-way pulse electric energy, one of which provides pulse voltage and current for the electric flocculation device, and the other of which provides pulse current for the battery; The wind turbine provides mechanical energy required for power generation for the switched reluctance pulse generator system; The electric flocculation device is used for removing pollutants in sewage; The sewage circulation and separation system is used for circulating and separating sewage; The battery is used for providing direct-current electric energy for the switched reluctance pulse generator system and the sewage circulation and separation system; The switched reluctance pulse generator system comprises a switched reluctance generator, a double-channel pulse power main circuit and a control circuit, the wind turbine is connected with the switched reluctance generator, the switched reluctance generator is connected with the double-channel pulse power main circuit, the double-channel pulse power main circuit is connected with the metal electrode of the electric flocculation device and the battery respectively, and the control circuit is connected with the double-channel pulse power main circuit.

2. The wind-driven power generation electric flocculation wastewater treatment system according to claim 1, characterized in that: An AC-DC conversion power supply is further included; When the battery is insufficient in electric quantity and the switched reluctance pulse generator system is insufficient in output pulse electric energy, the battery is charged by the AC-DC conversion power supply; When the electric flocculation device stops working, the battery is charged by the switched reluctance pulse generator system output pulse electric energy.

3. The wind driven power generation electric flocculation wastewater treatment system according to claim 1, characterized in that: The double-channel pulse power main circuit adopts a double-tube flyback converter.

4. The wind driven power generation electric flocculation wastewater treatment system according to claim 1, characterized in that: The switched reluctance generator comprises a rotor and a stator, and a plurality of salient poles are arranged on the rotor and the stator.

5. The wind driven power generating electric flocculation wastewater treatment system according to claim 4, wherein: The wind turbine is connected with the rotor, and the wind turbine drives the rotor to rotate.

6. The wind driven power generation electric flocculation wastewater treatment system according to claim 4, characterized in that: The switched reluctance pulse generator system further comprises a position sensor, the position sensor is connected with the control circuit, the position sensor is installed on the rotor, and the position sensor feeds back a position signal of the rotor to the control circuit.

7. The wind driven power generating electric flocculation wastewater treatment system according to claim 4, wherein: The stator is provided with a primary excitation winding L1 and a secondary pulse winding L2, the primary excitation winding L1 and the secondary pulse winding L2 are arranged in a concentric manner, the primary excitation winding L1 and the secondary pulse winding L2 are arranged on the same salient pole of the stator, the primary excitation winding L1 is located at an inner layer, and the secondary pulse winding L2 is located at an outer layer of the primary excitation winding L1.

8. The wind driven power generating electric flocculation wastewater treatment system according to claim 7, wherein: The primary excitation winding L1 comprises two parallel excitation coil groups, and each excitation coil group comprises four series excitation coils.

9. The wind driven power generating electric flocculation wastewater treatment system according to claim 7, wherein: The secondary pulse winding L2 comprises eight parallel pulse coils.

10. The wind driven power generating electric flocculation wastewater treatment system according to claim 1, wherein: The sewage circulation and separation system comprises a motor driving system, a driving motor, a dirt separation device and a circulating water pump, an input end of the motor driving system is connected with the battery, an output end of the motor driving system is connected with an input end of the driving motor, the driving motor provides power for the circulating water pump, and the circulating water pump is used for pushing sewage to circulate and separate.

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