Combined liquor wastewater treatment system and method based on microwave technology

Abstract

The invention discloses a combined liquor wastewater treatment system and method based on a microwave technology, and relates to the field of liquor wastewater treatment.The system comprises an adjusting device, a microwave decomposition device, an anaerobic box, an aerobic box and a microwave Fenton device which are sequentially connected, and the adjusting device is used for buffering water quality fluctuation and adjusting the PH value of wastewater; the microwave decomposition device utilizes microwave electromagnetism to enable the wastewater to generate strong oxidizing free radicals and degrade macromolecular organic matters; the anaerobic box decomposes organic matters step by step through anaerobic microorganisms, and macromolecular organic matters are converted into methane and carbon dioxide; the aerobic tank is used for converting organic matters in the wastewater into CO2 and H2O through the metabolism of aerobic microorganisms; the microwave Fenton device utilizes hydrogen peroxide and ferrous ions to generate hydroxyl radicals under the acidic condition, and COD in the wastewater is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to a combined liquor wastewater treatment system based on microwave technology. Background Art

[0002] Most of the raw materials for liquor are mainly wheat, corn, and sorghum. The wastewater generated during the brewing process mainly includes the still bottom water, koji box washing water, printed koji wastewater, liquor residue waste liquid, fermentation tank leachate, grain soaking water, distillation cooling water, and equipment cleaning wastewater generated during the production process. The main components of this type of wastewater are amino acids, low-carbon alcohols (such as ethanol and amyl alcohol), and fatty acids, belonging to high-concentration organic wastewater. This type of wastewater has the characteristics of high chemical oxygen demand (COD) concentration, large solid suspended matter (SS) content, strong biodegradability, and complex composition. However, the existing liquor wastewater treatment effect is poor, and it is unable to effectively remove the COD in the wastewater. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and the purpose is to provide a combined liquor wastewater treatment system based on microwave technology.

[0004] The present invention is achieved by the following technical solutions:

[0005] A combined liquor wastewater treatment system based on microwave technology, including a regulating device, a microwave decomposition device, an anaerobic tank, an aerobic tank, and a microwave Fenton device connected in sequence. The regulating device is used to buffer the water quality fluctuation and adjust the pH value of the wastewater; the microwave decomposition device uses microwave electromagnetic waves to generate strongly oxidizing free radicals in the wastewater to degrade macromolecular organic matter; the anaerobic tank decomposes organic matter step by step through anaerobic microorganisms and converts macromolecular organic matter into methane and carbon dioxide; the aerobic tank converts the organic matter in the wastewater into CO2 and H2O through the metabolic action of aerobic microorganisms; the microwave Fenton device uses hydrogen peroxide and ferrous ions to generate hydroxyl free radicals under acidic conditions to remove the COD in the wastewater.

[0006] The regulating device includes a regulating tank and a driving mechanism. The rotating shaft of the driving mechanism extends into the regulating tank. An expansion member and a first stirring plate are provided on the rotating shaft. A first connecting member is provided on the expansion member, and a plurality of first air holes and a second connecting member communicating with the first air holes are provided on the first stirring plate. The first stirring plate can axially move along the rotating shaft to connect the first connecting member and the second connecting member;

[0007] The microwave decomposition device includes a decomposition tank and a microwave source provided on the decomposition tank. The regulating tank and the decomposition tank are connected by a conduit.

[0008] Furthermore, a first through hole is provided in the rotating shaft, strip-shaped openings are provided on both sides of the side wall of the rotating shaft, and the strip-shaped openings communicate with the first through hole;

[0009] The first stirring plate is located in the strip-shaped opening, a guiding block is provided at the bottom of the first stirring plate, and the guiding block is located in the first through hole.

[0010] Furthermore, the expansion member includes an airbag in an annular structure, a fixing plate is provided on the rotating shaft, the airbag is sleeved on the rotating shaft, and the top of the airbag is connected to the bottom of the fixing plate.

[0011] Furthermore, the first connecting member includes a telescopic tube and a connecting head. Both the telescopic tube and the connecting head are located in the first through hole. The telescopic tube communicates with the airbag, and the connecting head is connected to the bottom of the telescopic tube;

[0012] A cavity communicating with the telescopic tube is provided in the connecting head. An inlet communicating with the cavity is further provided at the bottom of the connecting head. A first elastic member and a plugging plate are provided in the cavity, and the first elastic member pushes the plugging plate to block the inlet;

[0013] The second connecting member includes a connecting column with an outer diameter consistent with the inner diameter of the inlet. The connecting column is located in the first through hole and is connected to the top of the first stirring plate. A first channel communicating with the first air hole is provided on the side wall of the connecting column.

[0014] Furthermore, a liquid inlet pipe is further provided on the adjusting box. A transverse pipe is provided on the side wall of the liquid inlet pipe extending into the adjusting box. A connecting sleeve is provided at the end of the transverse pipe. An annular groove is further provided on the rotating shaft, and a second channel is further provided in the rotating shaft. One end of the second channel communicates with the annular groove, and the other end communicates with the telescopic tube;

[0015] The connecting sleeve is sleeved on the annular groove of the rotating shaft, and the transverse pipe communicates with the annular groove.

[0016] Furthermore, an air pump is further provided at the bottom of the adjusting box. A second through hole communicating with the first through hole is further provided in the rotating shaft. The inner diameter of the second through hole is larger than that of the first through hole. And the air pump communicates with the second through hole;

[0017] An active block and a push rod are provided in the second through hole. The outer diameter of the active block is consistent with the inner diameter of the second through hole, and the push rod is used to push the guiding block to move in the first through hole.

[0018] Furthermore, a second stirring plate is further provided on the side wall of the rotating shaft, and the second stirring plate is located below the first stirring plate;

[0019] The surface of the second stirring plate is provided with a number of second air holes. A third channel is further arranged in the rotating shaft. One end of the third channel communicates with the second through hole, and the other end communicates with the second air holes. A fourth channel is further arranged in the rotating shaft. The fourth channel penetrates through the third channel, and a blocking block for blocking the fourth channel is arranged in the fourth channel.

[0020] Further, a first blind hole is further arranged on the inner wall of the second through hole. The bottom of the first blind hole communicates with the fourth channel. A second elastic member and a first unlocking block are arranged in the first blind hole. The outer diameter of the first unlocking block is the same as the inner diameter of the first blind hole. A third through hole is further arranged on the blocking block; a locking groove is arranged on the inner wall of the second blind hole, and an installation groove is arranged on the first unlocking block. A third elastic member and a locking block are arranged in the installation groove.

[0021] Further, a second blind hole is further arranged on the inner wall of the second through hole. The second blind hole is located below the first blind hole. The second blind hole communicates with the locking groove. A fourth elastic member and a second unlocking block are arranged in the second blind hole. The outer diameter of the second unlocking block is the same as the inner diameter of the second blind hole.

[0022] A combined liquor wastewater treatment method based on microwave technology includes the following steps:

[0023] 1) Discharge the wastewater generated from liquor brewing into a regulating device, and use the regulating device to adjust the pH value of the wastewater;

[0024] 2) Transport the wastewater in the regulating device to a microwave decomposition device, add hydrogen peroxide to the microwave decomposition device, and use microwave electromagnetism to generate strongly oxidizing free radicals in the wastewater to degrade the macromolecular organic matter in the wastewater;

[0025] 3) Transport the wastewater after microwave decomposition to an anaerobic tank, and decompose the organic matter step by step through anaerobic microorganisms to convert the macromolecular organic matter into methane and carbon dioxide;

[0026] 4) Transport the wastewater treated in step 3) to a first sedimentation tank to perform solid-liquid separation on the wastewater;

[0027] 5) Transport the wastewater after solid-liquid separation to an aerobic tank, and convert the organic matter in the wastewater into CO2 and H2O through the metabolic action of aerobic microorganisms;

[0028] 6) Transport the wastewater treated in step 5) to a second sedimentation tank to continue performing solid-liquid separation on the wastewater;

[0029] 7) Transport the wastewater treated in step 6) to a microwave Fenton device, and use microwave catalysis to generate thousands of times the amount of hydroxyl free radicals by hydrogen peroxide and ferrous ions under acidic conditions to remove the remaining COD in the wastewater;

[0030] 8) Transfer the wastewater treated in step 7) to the third sedimentation tank, continue to perform solid-liquid separation on the wastewater, and discharge the separated wastewater that meets the first-class A standard for comprehensive sewage discharge (50 mg / L).

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] 1. The present invention utilizes the microwave electromagnetism of the provided microwave decomposition device to generate strongly oxidizing free radicals in the wastewater, degrade macromolecular organic matter, that is, through the collision heating of high-energy electrons and organic molecule, it specifically increases the kinetic energy of organic molecules in the sewage, and realizes the decomposition and cracking of refractory organic matter under mild conditions, thus replacing the harsh conditions required by conventional advanced oxidation technologies, reducing the treatment cost of organic matter in the wastewater, improving the treatment efficiency, and completing the decomposition chemical reaction from organic matter to inorganic matter, with the characteristics of fast reaction, complete reaction, and controllable reaction.

[0033] 2. The first stirring plate provided in the present invention can move vertically in the adjustment tank, changing the height of the first stirring plate in the adjustment tank, so as to meet the stirring of wastewater at different depths in the adjustment tank, making it fully mixed and uniform. At the same time, when the first stirring plate moves upward, it can squeeze the provided airbag, so that the hydrogen peroxide stored in the airbag is sprayed out from the first air holes on the first stirring plate and acts on the wastewater in the adjustment tank, improving the mixing strength of the wastewater and hydrogen peroxide, and thus improving the removal efficiency of molecular organic matter in the subsequent wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0035] Figure 1 is the flow chart of the present invention;

[0036] Figure 2 is the structural schematic diagram of the adjustment device and the microwave decomposition device of the present invention;

[0037] Figure 3 is the present invention Figure 1 The enlarged structural schematic diagram of part A in;

[0038] Figure 4 is the present invention Figure 1 The enlarged structural schematic diagram of part B in;

[0039] Figure 5 is the structural schematic diagram of the adjustment tank of the present invention in another state;

[0040] Figure 6 is the present invention Figure 4 The enlarged structural schematic diagram of part C in;

[0041] Figure 7 For the present invention Figure 4 is a schematic structural view of the enlarged part D in the present invention;

[0042] Figure 8 is a schematic structural view of a part of the rotating shaft of the present invention;

[0043] Figure 9 is a schematic structural view of the first stirring plate of the present invention.

[0044] Reference numerals in the drawings and corresponding component names:

[0045] 1, adjusting device; 2, microwave decomposition device; 3, anaerobic tank; 4, first sedimentation tank; 5, aerobic tank; 6, second sedimentation tank; 7, microwave Fenton device; 8, third sedimentation tank; 9, lift pump; 101, adjusting tank; 102, driving mechanism; 103, liquid inlet pipe; 104, expansion member; 105, rotating shaft; 107, second stirring plate; 108, air pump; 109, first stirring plate; 110, ejector rod; 111, second unlocking block; 112, movable block; 113, sixth elastic member; 114, third channel; 115, blocking block; 116, airbag; 117, telescopic pipe; 118, connector; 119, blocking plate; 120, connecting column; 121, first unlocking block; 122, locking block; 123, first through hole; 124, strip-shaped opening; 125, annular groove; 126, second channel; 127, first air hole; 128, guiding block; 129, second through hole; 130, connecting sleeve; 201, decomposition tank; 202, microwave source; 203, conduit. Detailed implementation manners

[0046] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0047] Embodiment 1

[0048] As Figure 1As shown in the figure, it includes a regulating device 1, a microwave decomposition device 2, an anaerobic tank 3, a first sedimentation tank 4, an aerobic tank 5, a second sedimentation tank, a microwave Fenton device 7, and a third sedimentation tank 8, which are connected in sequence. The regulating device 1 is used to buffer water quality fluctuations and adjust the pH value of the wastewater; the microwave decomposition device 2 uses microwave electromagnetism to generate strongly oxidizing free radicals in the wastewater to degrade macromolecular organic matter; the anaerobic tank 3 decomposes organic matter step by step through anaerobic microorganisms, converting macromolecular organic matter into methane and carbon dioxide. The first sedimentation tank 4 is used for solid-liquid separation of the wastewater treated by the anaerobic tank 3; the aerobic tank 5 converts the organic matter in the wastewater treated by the first sedimentation tank 4 into CO2 and H2O through the metabolic action of aerobic microorganisms; the second sedimentation tank 6 is used for re-solid-liquid separation of the wastewater treated by the aerobic tank 5; the microwave Fenton device 7 uses hydrogen peroxide and ferrous ions to generate hydroxyl radicals under acidic conditions to remove the COD in the wastewater treated by the second sedimentation tank 6; the third sedimentation tank 8 is used for re-solid-liquid separation of the wastewater treated by the microwave Fenton device 7, and the separated sewage can be discharged normally.

[0049] Example 2

[0050] As Figures 2 to 9 shown in the figure, the regulating device includes a regulating tank 101 and a driving mechanism 102. The rotating shaft 105 of the driving mechanism 102 extends into the regulating tank 101. An expansion member 104 and a first stirring plate 109 are provided on the rotating shaft 105. A first connecting member is provided on the expansion member 104. A number of first air holes 127 and a second connecting member communicating with the first air holes 127 are provided on the first stirring plate 109. The first stirring plate 109 can axially move along the rotating shaft 105 to connect the first connecting member and the second connecting member; the microwave decomposition device includes a decomposition tank 201 and a microwave source 202 provided on the decomposition tank 201. The regulating tank 101 is connected to the decomposition tank 201 through a conduit 203.

[0051] When treating the wastewater generated in the process of liquor production, this technical solution utilizes the provided regulating device and microwave decomposition device. Among them, the wastewater generated in liquor production is transported into the regulating tank 101, and then an appropriate amount of hydrogen peroxide is added to the regulating tank 101. The provided driving mechanism 102 is a motor. When the driving mechanism 102 works, it can drive the provided rotating shaft 105 to rotate in the regulating tank 101. The provided first stirring plate 109 can act on the wastewater and hydrogen peroxide in the regulating tank 101, enabling them to be fully mixed together. At the same time, in order to improve the full mixing between hydrogen peroxide and wastewater in this technical solution, an expansion member 104 is also provided on the rotating shaft 105, and the provided first stirring plate 109 can move on the rotating shaft 105. In this way, during the process of the rotating shaft 105 driving the first stirring plate 109 to rotate, the provided first stirring plate 109 can also move vertically in the regulating tank 101, changing the position of the first stirring plate 109, so that the first stirring plate 109 can act on the wastewater at different depths, improving the mixing strength of the wastewater and hydrogen peroxide in the regulating tank 101.

[0052] At the same time, when the provided first stirring plate 109 moves to the expansion member 104, the provided first connecting member is connected to the second connecting member. In this way, when the first stirring plate 109 continues to move towards the expansion member 104, the expansion member 104 will be squeezed, so that the medium in the expansion member 104 is transferred into the first air holes 127 on the first stirring plate 109 through the provided first connecting member and second connecting member, and finally sprayed out from the first air holes 127 and acts on the wastewater in the regulating tank 101, achieving the effect of bubbling the wastewater in the regulating tank 101, and further improving the full mixing between the wastewater and hydrogen peroxide.

[0053] After the full mixing between the wastewater and hydrogen peroxide in the regulating tank is completed, the wastewater in the regulating tank 101 is transported to the decomposition tank 201 by the lift pump 9 on the conduit 203. During the transmission of the wastewater in the conduit 203, since a microwave source 202 is provided on the decomposition tank 201, under the action of the microwave source 202, the hydrogen peroxide in the conduit 203 in the decomposition tank 201 decomposes to generate strongly oxidizing hydroxyl radicals, increasing the probability of contact and collision between the hydroxyl radicals and the organic molecule in the wastewater, thereby improving the removal efficiency of macromolecular organic matter in the wastewater. In addition, the non-thermal effect of microwaves can weaken the chemical bonds of reactant molecules, reduce the activation energy of the reaction, increase the reaction rate, and stimulate the decomposition of organic matter, so that the wastewater can initially reduce the COD and improve the biodegradability in the subsequent sedimentation tank.

[0054] In another embodiment, the conduit 203 located in the decomposition tank 201 is arranged in a snake shape or a spiral shape to increase the action time of the microwave source 202 on the wastewater in the conduit 203.

[0055] A first through hole 123 is provided in the rotating shaft 105. Strip-shaped openings 124 are provided on both sides of the side wall of the rotating shaft 105, and the strip-shaped openings 124 communicate with the first through hole 123. The first stirring plate 109 is located in the strip-shaped openings 124. A guiding block 128 is provided at the bottom of the first stirring plate 109, and the guiding block 128 is located in the first through hole 123.

[0056] In this embodiment, in order to ensure that the first stirring plate 109 provided can move on the rotating shaft 105 and change the height of the first stirring plate 109, so as to meet the stirring of sewage at different depths, a first through hole 123 and strip-shaped openings 124 are provided on the rotating shaft 105. The width of the provided strip-shaped openings 124 is smaller than the inner diameter of the first through hole 123, which ensures that the guiding block 128 located in the first through hole 123 cannot fall off from the strip-shaped openings 124 on both sides, and it can only move vertically in the first through hole 123. When the guiding block 128 moves in the first through hole 123, the first stirring plate 109 will move in the strip-shaped openings 124.

[0057] The expansion member 104 includes an airbag 116 with an annular structure. A fixing plate is provided on the rotating shaft 105. The airbag 116 is sleeved on the rotating shaft 105, and the top of the airbag 116 is connected to the bottom of the fixing plate.

[0058] The expansion member 104 provided in this embodiment is an airbag 116, which is made of nitrile rubber with anti-corrosion material. A number of springs are provided in the airbag 116, and the springs are distributed along the axial direction of the rotating shaft 105. The provided springs ensure that the airbag 116 is in an expanded state.

[0059] The first connecting member includes a telescopic tube 117 and a connecting head 118. Both the telescopic tube 117 and the connecting head 118 are located in the first through hole 123. The telescopic tube 117 communicates with the airbag 116, and the connecting head 118 is connected to the bottom of the telescopic tube 117. A cavity communicating with the telescopic tube 117 is provided in the connecting head 118. An inlet communicating with the cavity is further provided at the bottom of the connecting head 118. A first elastic member and a sealing plate 119 are provided in the cavity, and the first elastic member pushes the sealing plate 119 to block the inlet. The second connecting member includes a connecting column 120 with an outer diameter consistent with the inner diameter of the inlet. The connecting column 120 is located in the first through hole and is connected to the top of the first stirring plate 109. A first channel communicating with the first air hole 127 is provided on the side wall of the connecting column 120.

[0060] In order to achieve the connection between the first connecting member and the second connecting member, the first connecting member is provided with a telescopic tube 117 and a connector 118. In the initial state, the plugging plate 119 in the connector 118 plugs the inlet under the action of the first elastic member. At this time, the telescopic tube 117 and the airbag 116 are in a closed state. When the first stirring plate 109 moves towards the airbag 116, the connecting column 120 on the first stirring plate 109 extends into the inlet and pushes the plugging plate 119 to retract. When the first channel on the side wall of the connecting column 120 extends into the cavity, the telescopic tube 117 will communicate with the first channel at this time. Therefore, when the first stirring plate 109 squeezes the airbag 116, the fluid medium in the airbag 116 will sequentially pass through the telescopic tube 117, the cavity, the first channel, and the first air hole 127, and finally the fluid medium in the airbag 116 will act on the wastewater in the adjustment tank 101 from the first air hole 127, achieving the purpose of bubbling the wastewater, thereby improving the mixing strength between hydrogen peroxide and sewage.

[0061] A liquid inlet pipe 103 is further provided on the adjustment tank 101. A horizontal pipe is further provided on the side wall of the liquid inlet pipe 103 extending into the adjustment tank 101. A connecting sleeve 130 is provided at the end of the horizontal pipe. An annular groove 125 is further provided on the rotating shaft 105. A second channel 126 is further provided in the rotating shaft 105. One end of the second channel 126 communicates with the annular groove 125, and the other end communicates with the telescopic tube 117. The connecting sleeve 130 is sleeved on the annular groove 125 of the rotating shaft 105, and the horizontal pipe communicates with the annular groove.

[0062] In this embodiment, the liquid inlet pipe 103 is connected to a tank storing hydrogen peroxide outside. Hydrogen peroxide can be transported into the horizontal pipe through the liquid inlet pipe 103. Then the hydrogen peroxide enters the second channel 126 through the annular groove 125, and finally the hydrogen peroxide is transported into the airbag 116. First, the hydrogen peroxide is temporarily stored in the airbag 116. In this way, when the first stirring plate 109 squeezes the airbag 116, the hydrogen peroxide stored in the airbag 116 can be ejected from the first air hole 127 through the first connecting member and the second connecting member, acting on the wastewater, so that the wastewater and hydrogen peroxide can be fully mixed.

[0063] Since the wastewater generated during the production and manufacturing process of Baijiu may fluctuate violently due to factors such as production batches and cleaning cycles, the provided adjustment tank 101 is used to make the wastewater concentration tend to be uniform through mixing and buffering, avoiding an impact on the subsequent microwave decomposition device. Therefore, when wastewater of different concentrations is simultaneously discharged into the adjustment tank 101, the provided first stirring plate 109 is used to first stir the waste of different concentrations to make the waste tend to be uniform, and then hydrogen peroxide is added into the adjustment tank 101. Therefore, in this embodiment, the hydrogen peroxide to be added is stored in the airbag 116. In this way, when the rotating shaft 105 drives the first stirring plate 109 to rotate, it first stirs the wastewater of different concentrations discharged into the adjustment tank 101 to make the concentration tend to be uniform. During the stirring process, the provided first stirring plate 109 moves towards the airbag 116 direction and finally makes the first connecting member communicate with the second connecting member. In this way, when the first stirring plate 109 squeezes the airbag 116, the hydrogen peroxide stored in the airbag 116 will act on the wastewater through the first air holes 127 on the first stirring plate 109, realizing the full mixing of the hydrogen peroxide and the uniformly mixed wastewater again.

[0064] A gas pump 108 is further provided at the bottom of the adjustment tank 101. A second through hole 129 communicating with the first through hole 123 is further provided in the rotating shaft 105. The inner diameter of the second through hole 129 is larger than that of the first through hole 123. And the gas pump 108 is communicated with the second through hole 129. An active block 112 and a push rod 110 are provided in the second through hole 129. The outer diameter of the active block 112 is the same as the inner diameter of the second through hole 129. The push rod 110 is used to push the guide block 128 to move in the first through hole 123.

[0065] In this embodiment, in order to ensure that the provided first stirring plate 109 can smoothly move in the adjustment tank 101 in the vertical direction and change the position of the first stirring plate 109, a gas pump 108 is further provided. When the gas pump 108 works, it can transport pressurized gas into the second through hole 129 of the rotating shaft 105. The pressurized gas entering the second through hole 129 pushes the active block 112 to move upward in the second through hole 129, so that the push rod 110 pushes the guide block 128 to move upward in the first through hole 123, realizing the adjustment of the position of the first stirring plate 109.

[0066] In another embodiment, a bearing matching the rotating shaft 105 is provided at the inner bottom of the adjustment tank 101, which ensures that the lower end of the rotating shaft 105 can be rotatably connected to the bottom of the adjustment tank 101.

[0067] A second stirring plate 107 is further provided on the side wall of the rotating shaft 105, and the second stirring plate 107 is located below the first stirring plate 109; a plurality of second air holes are provided on the surface of the second stirring plate 107, a third channel 114 is further provided in the rotating shaft 105, one end of the third channel 114 communicates with the second through hole 129, and the other end communicates with the second air holes. A fourth channel is further provided in the rotating shaft 105, the fourth channel penetrates through the third channel 114, and a blocking block 115 for blocking the fourth channel is provided in the fourth channel.

[0068] In this embodiment, in order to further improve the stirring force on the sewage, a second stirring plate 107 is further provided on the rotating shaft 105. The second stirring plate 107 is close to the inner bottom of the adjustment tank 101, and the provided second stirring plate 107 can stir the wastewater at the lower part of the adjustment tank 101.

[0069] A first blind hole is further provided on the inner wall of the second through hole 129. The bottom of the first blind hole communicates with the fourth channel. A second elastic member and a first unlocking block 121 are provided in the first blind hole. The outer diameter of the first unlocking block 121 is the same as the inner diameter of the first blind hole. A third through hole is further provided on the blocking block 115; a locking groove is provided on the inner wall of the second blind hole, and a third elastic member and a locking block 122 are provided in the installation groove of the first unlocking block 121.

[0070] A second blind hole is further provided on the inner wall of the second through hole 129. The second blind hole is located below the first blind hole. The second blind hole communicates with the locking groove. A fourth elastic member and a second unlocking block 111 are provided in the second blind hole. The outer diameter of the second unlocking block 111 is the same as the inner diameter of the second blind hole.

[0071] In this embodiment, in order to further improve the stirring strength of the second stirring plate 107 on the waste, a number of second air holes are further provided on the second stirring plate 107. At the same time, a third channel 114 and a fourth channel are provided in the rotating shaft 105. The fourth channel is vertically and cross-connected with the third channel 114. A fifth elastic member and a blocking block 115 are provided in the fourth channel. The inner diameter of the fourth channel is larger than that of the third channel 114 to ensure that the provided blocking block 115 can block the third channel 114. In the initial state, under the action of the fifth elastic member, the third through hole on the blocking block 115 is located in the fourth channel. When the pressurized gas generated by the air pump 108 enters the second through hole 129, it pushes the movable block 112 to move upward in the second through hole 129. When the movable block 112 moves to the first unlocking block 121, the side wall of the provided movable block 112 will push the first unlocking block 121 back into the first blind hole. When the first unlocking block 121 retreats, it will squeeze the air in the first blind hole, so that a part of the air in the first blind hole enters the fourth channel, pushing the blocking block 115 in the fourth channel to move towards the fifth elastic member. Finally, the third through hole on the blocking block 115 moves into the third channel 114, and under the action of the third through hole, the third channel 114 is opened. At this time, the operation of the air pump 108 is stopped, and the provided movable block 112 will retreat downward. During the retreat process, the air in the second through hole 129 is squeezed into the third channel 114, and the air entering the third channel 114 is finally discharged through the second air holes on the second stirring plate 107, achieving the purpose of bubbling the wastewater in the lower layer of the adjustment tank 101.

[0072] A sixth elastic member 113 is further provided in the second through hole 129 of the rotating shaft 105. The sixth elastic member 113 is connected to the movable block. An air inlet is further provided at the bottom of the adjustment tank 101. The air pump 108 is communicated with the second through hole 129 through the air inlet. A one-way valve is provided in the second through hole 129. The one-way valve is used to ensure that the gas generated by the air pump 108 can enter the second through hole 129, and the air in the second through hole 129 cannot flow back through the one-way valve.

[0073] In this way, the provided sixth elastic member 113 can pull the movable block 112 to quickly retreat in the second through hole 129, thereby squeezing the remaining air in the second through hole 129 to the second air holes of the second stirring plate 107, achieving the purpose of bubbling the wastewater in the adjustment tank 101.

[0074] To prevent the first unlocking block 121 from being re-removed from the first blind hole during the downward retraction of the movable block 112, resulting in negative pressure in the first blind hole and causing the third through hole on the plugging block 115 to be removed from the third channel 114, an installation groove is provided on the first unlocking block 121. A third elastic member and a locking block 122 are arranged in the installation groove. When the movable block 112 completely pushes the end of the first unlocking block 121 back into the first blind hole, the locking block 122 just inserts into the locking groove under the action of the third elastic member, thereby fixing the first unlocking block 121 in the first blind hole. When the movable block 112 retracts to the second unlocking block 111, the side wall of the movable block 112 pushes the second unlocking block 111 to retract into the second blind hole. During the retraction of the second unlocking block 111, the air in the second blind hole is squeezed, causing part of the air in the second blind hole to enter the unlocking groove and pushing the locking block 122 out of the unlocking groove, removing the restriction on the first unlocking block 121. As a result, the first unlocking block 121 extends back into the second through hole 129 again. During the movement of the first unlocking block 121, the negative pressure generated in the first blind hole will cause the third through hole on the plugging block 115 to move back into the fourth channel again, disconnecting the third channel 114, so that when the air pump 108 conveys pressurized gas into the second through hole 129 later, the pressurized gas entering the second through hole 129 will not leak through the third channel 114.

[0075] In another embodiment, inclined plates are provided at the ends of the first unlocking block 121 and the second unlocking block 111 located at the end of the second through hole 129, so as to ensure that the movable block 112 can smoothly push the first unlocking block 121 and the second unlocking block 111 to move radially along the rotation axis 105 during the movement in the second through hole 129.

[0076] Embodiment 3

[0077] The anaerobic tank 4, the first sedimentation tank 4, the aerobic tank 5, the second sedimentation tank 6, the microwave Fenton tank 7, and the third sedimentation tank 8 are all prior arts, and the treatment principle of the wastewater will not be elaborated here.

[0078] Embodiment 4

[0079] The combined liquor wastewater treatment method based on microwave technology includes the following steps:

[0080] 1) Discharge the wastewater generated by liquor brewing into the regulating device 1, and use the regulating device 1 to adjust the pH value of the wastewater;

[0081] 2) Convey the wastewater in the regulating device 1 to the microwave decomposition device 2, add hydrogen peroxide to the microwave decomposition device 2, and use microwave electromagnetic fields to generate strongly oxidizing free radicals in the wastewater to degrade the macromolecular organic matter in the wastewater;

[0082] 3) Transfer the wastewater after microwave hydrolysis to the anaerobic tank 3, and decompose organic matter step by step through anaerobic microorganisms to convert macromolecular organic matter into methane and carbon dioxide;

[0083] 4) Transfer the wastewater treated in step 3) to the first sedimentation tank 4 for solid-liquid separation of the wastewater;

[0084] 5) Transfer the wastewater after solid-liquid separation to the aerobic tank 5, and convert the organic matter in the wastewater into CO2 and H2O through the metabolic action of aerobic microorganisms;

[0085] 6) Transfer the wastewater treated in step 5) to the second sedimentation tank 6 for continuous solid-liquid separation of the wastewater;

[0086] 7) Transfer the wastewater treated in step 6) to the microwave Fenton device 7, and use microwave to catalyze hydrogen peroxide and ferrous ions to generate thousands of times the amount of hydroxyl radicals under acidic conditions to remove the remaining COD in the wastewater;

[0087] 8) Transfer the wastewater treated in step 7) to the third sedimentation tank 8 for continuous solid-liquid separation of the wastewater, and discharge it after separation to meet the first-class A standard for comprehensive wastewater discharge (50 mg / L).

[0088] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A combined liquor wastewater treatment system based on microwave technology, characterized in that It includes a regulating device (1), a microwave decomposition device (2), an anaerobic tank (3), an aerobic tank (5), and a microwave Fenton device (7) connected in sequence. The regulating device (1) is used to buffer water quality fluctuations and adjust the pH value of wastewater; the microwave decomposition device (2) uses microwave electromagnetism to generate strongly oxidizing free radicals in the wastewater to degrade macromolecular organic matter; the anaerobic tank (3) decomposes organic matter step by step through anaerobic microorganisms to convert macromolecular organic matter into methane and carbon dioxide; the aerobic tank (5) converts the organic matter in the wastewater into CO2 and H2O through the metabolic action of aerobic microorganisms; the microwave Fenton device (7) uses hydrogen peroxide and ferrous ions to generate hydroxyl radicals under acidic conditions to remove COD in the wastewater.

2. The combined liquor wastewater treatment system based on microwave technology according to claim 1, wherein The regulating device (1) includes a regulating tank (101) and a driving mechanism (102). The rotating shaft (105) of the driving mechanism (102) extends into the regulating tank (101). An expansion member (104) and a first stirring plate (109) are provided on the rotating shaft (105). A first connecting member is provided on the expansion member (104). A plurality of first air holes (127) and a second connecting member communicating with the first air holes (127) are provided on the first stirring plate (109). The first stirring plate (109) can axially move along the rotating shaft (105) to connect the first connecting member and the second connecting member. The microwave decomposition device (2) includes a decomposition tank (201) and a microwave source (202) provided on the decomposition tank (201). The regulating tank (101) is connected to the decomposition tank (201) through a conduit (203).

3. The combined liquor wastewater treatment system based on microwave technology according to claim 1, characterized in that, A first through hole (123) is provided in the rotating shaft (105). Strip-shaped openings (124) are provided on both sides of the side wall of the rotating shaft (105), and the strip-shaped openings (124) communicate with the first through hole (123). The first stirring plate (109) is located in the strip-shaped opening (124). A guiding block (128) is provided at the bottom of the first stirring plate (109), and the guiding block (128) is located in the first through hole (123).

4. The combined liquor wastewater treatment system based on microwave technology according to claim 2, wherein, The expansion member (104) includes an annular airbag (116). A fixing plate is provided on the rotating shaft (105). The airbag (116) is sleeved on the rotating shaft (105), and the top of the airbag (116) is connected to the bottom of the fixing plate. The first connecting member includes a telescopic tube (117) and a connecting head (118). Both the telescopic tube (117) and the connecting head (118) are located in the first through hole (123). The telescopic tube (117) communicates with the airbag (116), and the connecting head (118) is connected to the bottom of the telescopic tube (117). A cavity communicating with the telescopic tube (117) is provided in the connecting head (118). An inlet communicating with the cavity is further provided at the bottom of the connecting head (118). A first elastic member and a plugging plate (119) are provided in the cavity. The first elastic member pushes the plugging plate (119) to plug the inlet. The second connecting piece includes a connecting column (120) with an outer diameter consistent with the inner diameter of the inlet. The connecting column (120) is located in the first through hole and is connected to the top of the first stirring plate (109). A first channel communicating with the first air hole (127) is provided on the side wall of the connecting column (120).

5. The combined liquor wastewater treatment system based on microwave technology according to claim 4, characterized in that A liquid inlet pipe (103) is further provided on the regulating box (101). A transverse pipe is further provided on the side wall of the liquid inlet pipe (103) extending into the regulating box (101). A connecting sleeve (130) is provided at the end of the transverse pipe. An annular groove (125) is further provided on the rotating shaft (105). A second channel (126) is further provided in the rotating shaft (105). One end of the second channel (126) communicates with the annular groove (125), and the other end communicates with the telescopic pipe (117). The connecting sleeve (130) is sleeved on the annular groove (125) of the rotating shaft (105), and the transverse pipe communicates with the annular groove.

6. The combined liquor wastewater treatment system based on microwave technology according to claim 2, wherein An air pump (108) is further provided at the bottom of the regulating box (101). A second through hole (129) communicating with the first through hole (123) is further provided in the rotating shaft (105). The inner diameter of the second through hole (129) is larger than that of the first through hole (123). And the air pump (108) communicates with the second through hole (129). An active block (112) and a push rod (110) are provided in the second through hole (129). The outer diameter of the active block (112) is consistent with the inner diameter of the second through hole (129). The push rod (110) is used to push the guiding block (128) to move in the first through hole (123).

7. The combined liquor wastewater treatment system based on microwave technology according to claim 6, characterized in that, A second stirring plate (107) is further provided on the side wall of the rotating shaft (105). The second stirring plate (107) is located below the first stirring plate (109). A plurality of second air holes are provided on the surface of the second stirring plate (107). A third channel (114) is further provided in the rotating shaft (105). One end of the third channel (114) communicates with the second through hole (129), and the other end communicates with the second air holes. A fourth channel is further provided in the rotating shaft (105). The fourth channel penetrates through the third channel (114). A blocking block (115) for blocking the fourth channel is provided in the fourth channel.

8. The combined liquor wastewater treatment system based on microwave technology according to claim 7, characterized in that, A first blind hole is further provided on the inner wall of the second through hole (129). The bottom of the first blind hole communicates with the fourth channel. A second elastic member and a first unlocking block (121) are provided in the first blind hole. The outer diameter of the first unlocking block (121) is consistent with the inner diameter of the first blind hole. A third through hole is further provided on the blocking block (115). A locking groove is provided on the inner wall of the second blind hole. A third elastic member and a locking block (122) are provided in the mounting groove of the first unlocking block (121).

9. The combined liquor wastewater treatment system based on microwave technology according to claim 8, characterized in that, A second blind hole is further provided on the inner wall of the second through hole (129). The second blind hole is located below the first blind hole. The second blind hole communicates with the locking groove. A fourth elastic member and a second unlocking block (111) are provided in the second blind hole. The outer diameter of the second unlocking block (111) is consistent with the inner diameter of the second blind hole.

10. A combined liquor wastewater treatment method based on microwave technology, characterized in that, Including the following steps: 1) Discharge the wastewater generated from liquor brewing into the regulating device (1) to adjust the pH value of the wastewater by using the regulating device (1); 2) Transport the wastewater in the regulating device (1) to the microwave decomposition device (2), add hydrogen peroxide to the microwave decomposition device (2), and use microwave electromagnetism to generate strongly oxidizing free radicals in the wastewater to degrade the macromolecular organic matter in the wastewater; 3) Transport the microwave-decomposed wastewater to the anaerobic tank (3), and decompose the organic matter step by step through anaerobic microorganisms to convert the macromolecular organic matter into methane and carbon dioxide; 4) Transport the wastewater treated in step 3) to the first sedimentation tank (4) to perform solid-liquid separation on the wastewater; 5) Transport the solid-liquid separated wastewater to the aerobic tank (5), and convert the organic matter in the wastewater into CO2 and H2O through the metabolic action of aerobic microorganisms; 6) Transport the wastewater treated in step 5) to the second sedimentation tank (6) to continue performing solid-liquid separation on the wastewater; 7) Transport the wastewater treated in step 6) to the microwave Fenton device (7), and use microwave catalysis to generate thousands of times the amount of hydroxyl radicals from hydrogen peroxide and ferrous ions under acidic conditions to remove the remaining COD in the wastewater; 8) Transport the wastewater treated in step 7) to the third sedimentation tank (8) to continue performing solid-liquid separation on the wastewater, and discharge it after reaching the first-class A standard for comprehensive sewage discharge after separation.

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