CN115385512A - Waste water treatment device - Google Patents

Abstract

The invention relates to a waste water treatment device, which includes an electrolysis mechanism and a sterilization mechanism. The electrolysis mechanism includes a cathode electrode and an anode electrode, the cathode electrode is used to electrolyze hydrogen gas, and the anode electrode is used to electrolyze chlorine gas. The accommodating chamber of the sterilizing mechanism is connected to the anode chamber through the first air delivery pipe, and the first air delivery pipe is provided with a first power pump, and the chlorine gas electrolyzed is pumped into the accommodating chamber under the action of the first power pump. By mixing chlorine gas with wastewater. Since active chlorine substances such as chlorine gas have strong oxidizing properties, they can kill bacteria in wastewater. By electrolyzing salt water, active chlorine substances are generated, and the active chlorine substances are passed into industrial wastewater, so that the industrial wastewater can be sterilized for subsequent recycling, such as for washing or flushing. In the process of wastewater treatment, only the electric energy required by the brine and the electrolysis mechanism is consumed, the operation cost is low, and the treatment method is more convenient.

Description

Wastewater Treatment Plant

technical field

The invention relates to the field of industrial technology, in particular to a waste water treatment device.

Background technique

In order to realize the recycling of industrial wastewater, the existing method generally uses trucks to transport active chlorine substances to kill bacteria in the wastewater, so as to realize the treatment and recycling of the wastewater. However, there are certain safety hazards in the transportation of this active chlorine substance, so the source of the sterilizing substance is blocked, which makes the sterilization treatment of wastewater inconvenient.

Contents of the invention

Based on this, it is necessary to provide a wastewater treatment device that solves the above-mentioned problems in view of the inconvenience of traditional wastewater sterilization methods.

A wastewater treatment device, comprising:

The electrolysis mechanism includes a cathode chamber provided with a cathode electrode and an anode chamber provided with an anode electrode; the anode chamber is provided with an anode gas outlet, and the anode gas outlet is used to discharge chlorine gas electrolyzed from brine;

The sterilizing mechanism has an accommodating chamber, the anode gas outlet communicates with the anode gas outlet through a first gas delivery pipe, and a first power pump is arranged on the first gas delivery pipe; the first power pump is used to Chlorine gas is pumped into the accommodating chamber through the first gas delivery pipe to kill bacteria in the wastewater in the accommodating chamber.

In one of the embodiments, the cathode chamber is provided with a cathode gas outlet, and the cathode gas outlet is used to discharge the electrolytically separated hydrogen;

The wastewater treatment device includes a gas engine and a burner, the gas engine includes a heating chamber and a piston slidingly connected to the heating chamber; the burner communicates with the cathode gas outlet through a second gas delivery pipe, and the hydrogen capable of burning in the burner to heat the heating chamber, thereby pushing the piston to reciprocate relative to the heating chamber;

The first power pump is connected with the piston to convert the kinetic energy of the reciprocating motion of the piston into kinetic energy for the first power pump to pump the chlorine gas into the accommodation chamber.

In one of the embodiments, the wastewater treatment device includes a transmission mechanism, and the transmission mechanism includes a rotating member and a swing rod rotatably connected to the rotating member;

The rotating member is connected to the first impeller of the first power pump, and the swing rod is connected to the piston in rotation; the piston drives the rotating member to rotate through the swing rod, and the rotating member drives the The first impellers rotate synchronously.

In one of the embodiments, the wastewater treatment device includes a chlorine storage tank connected to the first gas pipeline, and the chlorine gas enters the chlorine storage tank through the anode gas outlet; the first power pump is used to The chlorine gas in the chlorine storage tank is pumped into the containing chamber.

In one of the embodiments, a gas distribution pipe connected to the first gas delivery pipe is provided in the accommodation chamber, and a plurality of spaced aeration holes are arranged on the gas distribution pipe, and the chlorine gas in the chlorine storage tank passes through The aeration hole enters the accommodating chamber.

In one of the embodiments, there are multiple air distribution tubes, and the multiple air distribution tubes are arranged at intervals along the horizontal direction.

In one of the embodiments, the sterilizing mechanism includes a stirring assembly, the stirring assembly includes a stirring drive member and a plurality of stirring rods connected to the stirring drive member, the stirring rods are located below the air distribution pipe, The stirring driving member is used to drive the stirring rod to rotate.

In one of the embodiments, the anode chamber has a liquid outlet, and the liquid outlet communicates with the accommodating chamber through a water outlet pipe, and the water outlet pipe is provided with a water outlet power pump; the third water outlet power pump The impeller is connected with the rotating member, and the third impeller is driven to rotate by the rotating member, so as to pump the electrolyzed hypochlorite solution into the containing chamber, so as to eliminate the bacteria in the waste water in the containing chamber to kill.

In one of the embodiments, the wastewater treatment device includes a hydrogen storage tank connected to the second gas delivery pipe and a second power pump, and the hydrogen enters the hydrogen storage tank through the cathode gas outlet; the first The second impeller of the second power pump is connected to the rotating member, and the second impeller is driven to rotate by the rotating member to pump the hydrogen in the hydrogen storage tank into the burner.

In one of the embodiments, the wastewater treatment device further includes a water tank, and the water tank is connected to the cathode chamber through a water inlet pipe; a water inlet power pump is arranged on the water inlet pipe, and the fourth water inlet power pump The impeller is connected with the rotating member, and the fourth impeller is driven to rotate by the rotating member to pump the brine in the water tank into the electrolysis mechanism.

The technical solution has the following beneficial effects: the above-mentioned wastewater treatment device includes an electrolysis mechanism and a sterilization mechanism. The electrolysis mechanism is used to electrolyze brine, and the electrolysis mechanism includes a cathode electrode and an anode electrode, the cathode electrode is used for electrolyzing hydrogen gas, and the anode electrode is used for electrolyzing chlorine gas. The accommodating chamber of the sterilizing mechanism is connected to the anode chamber through the first air delivery pipe, and the first air delivery pipe is provided with a first power pump, and under the action of the first power pump, the chlorine gas electrolyzed is pumped into the accommodating chamber for use with Wastewater mixed. Since active chlorine substances such as chlorine gas have strong oxidizing properties, they can kill bacteria in wastewater. By electrolyzing salt water, active chlorine substances are generated, and the active chlorine substances are passed into industrial wastewater, so that industrial wastewater can be sterilized for subsequent recycling, such as for washing or flushing. In the process of wastewater treatment, only the electric energy required by the brine and the electrolysis mechanism is consumed, the operation cost is low, and the treatment method is more convenient.

Description of drawings

Fig. 1 is a schematic structural view of a wastewater treatment device provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a sterilization mechanism in the wastewater treatment device shown in Fig. 1 .

Reference signs: 10-wastewater treatment device; 110-cathode chamber; 111-cathode electrode; 120-anode chamber; 121-anode electrode; 200-gas engine; 210-heating chamber; 220-piston; 300-sterilization mechanism; 310-accommodating cavity; 321-distributing pipe; 322-aeration hole; 331-stirring driver; 332-stirring rod; 410-rotating member; 420-swing rod; The second air pipe; 530-second power pump; 540-outlet pipe; 550-water outlet power pump; 600-water tank; 610-water inlet pipe; 620-water inlet power pump; Air pipe; 730-the first power pump; 810-wire; 820-power supply; 900-burner.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

FIG. 1 is a schematic structural diagram of a wastewater treatment device 10 provided by an embodiment of the present invention; FIG. 2 is a schematic diagram of a sterilization mechanism 300 in the wastewater treatment device 10 shown in FIG. 1 . As shown in FIGS. 1 and 2 , an embodiment of the present invention provides a wastewater treatment device 10 , including an electrolysis mechanism and a sterilization mechanism 300 . The electrolysis mechanism includes a cathode chamber 110 provided with a cathode electrode 111 and an anode chamber 120 provided with an anode electrode 121 . The anode chamber 120 is provided with an anode gas outlet, and the anode gas outlet is used to discharge the chlorine gas that is electrolytically separated from the brine. The sterilizing mechanism 300 has a housing chamber 310, the housing chamber 310 communicates with the anode gas outlet through the first gas delivery pipe 720, and the first gas delivery pipe 720 is provided with a first power pump 730; the first power pump 730 is used to pass chlorine gas through the first The air pipe 720 is pumped into the chamber 310 to kill bacteria in the waste water.

Specifically, both the cathode chamber 110 and the anode chamber 120 are filled with brine (sodium chloride solution), and the electrolysis mechanism is connected to a power source 820 through a wire 810 to perform electrolysis on the brine. The cathode electrode 111 electrolyzes hydrogen gas, the anode electrode 121 electrolyzes chlorine gas, and the sodium chloride solution is converted into a hypochlorite solution after electrolysis. Under the action of the first power pump 730 , the electrolytically separated chlorine gas can be discharged at a relatively fast speed, and enter the accommodating chamber 310 of the sterilization mechanism 300 through the first gas delivery pipe 720 . The waste water discharged during the production process is recycled to the chamber 310 through a pipeline such as a recovery pipe, so as to be mixed with the chlorine gas in the chamber 310 . Since chlorine gas and other active chlorine substances have strong oxidizing properties, they can kill bacteria in wastewater and facilitate the recycling of treated wastewater, such as for washing or flushing. In the process of wastewater treatment, only the electric energy required by the brine and the electrolysis mechanism is consumed, the operation cost is low, and the treatment method is more convenient. In other embodiments, instead of recycling the waste water to the holding chamber, the chlorine gas pumped into the holding chamber may be directly discharged into the waste water for sterilizing treatment.

Further, the brine may be waste brine discharged after being used by users, for example, waste brine discharged after water softening treatment. In this way, the recycling of waste brine can be realized. By electrolyzing the waste brine to generate active chlorine substances, on the one hand, it can sterilize industrial wastewater. On the other hand, the electrolysis of waste brine produces hypochlorous acid solution, which weakens the corrosivity of waste brine and reduces the pollution to the environment after it is discharged.

As shown in FIG. 1 , in an optional embodiment, the cathode chamber 110 is provided with a cathode gas outlet, and the cathode gas outlet is used to discharge hydrogen gas electrolyzed. Wherein, a diaphragm is arranged between the cathode chamber 110 and the anode chamber 120 for isolating the cathode chamber 110 and the anode chamber 120 to reduce the possibility of mixing hydrogen and chlorine. The wastewater treatment device 10 includes a gas engine 200 and a burner 900 , the gas engine 200 includes a heating chamber 210 and a piston 220 slidingly connected to the heating chamber 210 . The burner 900 communicates with the cathode gas outlet through the second gas delivery pipe 520, and the hydrogen gas flowing out from the second gas delivery pipe 520 can be burned by the burner 900 to heat the heating chamber 210, and the heating chamber 210 expands when heated, thereby pushing the piston 220 to be relatively heated Chamber 210 reciprocates. The first power pump 730 is connected with the piston 220 to convert the kinetic energy of the reciprocating motion of the piston 220 into kinetic energy for the first power pump 730 to pump chlorine gas into the accommodating chamber 310 .

Through the cooperation of the burner 900 and the gas engine 200, the electrolytically separated hydrogen is combusted and utilized, thereby converting heat energy into kinetic energy, which is used as the power source of the first power pump 730, so that the first power pump 730 operates, thereby converting chlorine The gas is pumped into the containing chamber 310 without an external power supply to drive the first power pump 730 to operate, which not only reduces the consumption of electric energy and saves costs, but also realizes the effective utilization of hydrogen.

In this embodiment, the gas engine 200 may specifically be a Stirling engine. The combustor 900 burns the hydrogen to generate a flame to heat the heating chamber 210 , so that the internal pressure of the heating chamber 210 changes, so that the piston 220 reciprocates, thereby converting thermal energy into kinetic energy. Understandably, the bottom of the Stirling engine is connected with a support seat for supporting the Stirling engine. In other embodiments, the gas engine may be a hydrogen internal combustion engine, a gas turbine, a fuel cell, and the like.

As shown in FIG. 1 , in a specific embodiment, the wastewater treatment device 10 includes a transmission mechanism, and the transmission mechanism includes a rotating member 410 and a swing rod 420 rotatably connected to the rotating member 410 . The rotating member 410 is connected to the first impeller of the first power pump 730 , and the swing rod 420 is rotatably connected to the piston 220 . The heating chamber 210 of the gas engine 200 is heated by the burner 900, so that the piston 220 reciprocates, and the rotating member 410 is driven to rotate under the action of the swing rod 420, thereby driving the first impeller connected to the rotating member 410 to rotate synchronously. Relying on the force of the fast-rotating first impeller on the fluid, the kinetic energy is transferred to the fluid to increase its kinetic energy and pressure energy, and the fluid is delivered under the action of the pressure energy, thereby pumping chlorine gas into the containing chamber 310 to treat the waste water Bacteria in it are killed. The action principle of the rotating member 410, the swing rod 420 and the piston 220 can refer to the slider crank mechanism in the prior art. Specifically, the rotating member may be a roller, and the first impeller is connected to the central axis of the roller, and can rotate synchronously with the roller.

As shown in Figure 1, further, the transmission mechanism also includes a transmission member 430, which is in transmission connection with the rotating member 410, and the transmission member 430 is connected with the first impeller, and the power is transmitted to the first impeller through the transmission member 430 to realize Fluid delivery. Specifically, the rotating member 410 is specifically a driving gear, and the transmission member 430 is specifically a driven gear, and the driving gear and the driven gear are meshed to transmit power to the first impeller.

As shown in Figure 1, in one embodiment, the wastewater treatment device 10 includes a chlorine storage tank 710 connected to the first gas delivery pipe 720, chlorine gas enters the chlorine storage tank 710 through the anode gas outlet; The chlorine gas in the chlorine tank 710 is pumped into the containing chamber 310 . Specifically, the chlorine storage tank 710 acts as a temporary buffer. When the air pressure in the chlorine storage tank 710 reaches a certain value, chlorine gas will flow out from the gas outlet of the chlorine storage tank 710 and enter the accommodating chamber 310 . Through the cooperation of the chlorine storage tank 710 and the first power pump 730, the electrolytic chlorine gas can be transported to the sterilization mechanism 300 without backflow, so that the chlorine gas transport is stable and reliable, and the sterilization effect on wastewater is guaranteed.

As shown in Figures 1 and 2, in an optional embodiment, a gas distribution pipe 321 connected to the first gas delivery pipe 720 is provided in the housing chamber 310, and a plurality of spaced aeration holes 322 are provided on the gas distribution pipe 321 , the chlorine gas in the chlorine storage tank 710 enters the accommodating chamber 310 through the aeration hole 322 . By setting a plurality of aeration holes 322 on the gas distribution pipe 321, the mixing of chlorine gas and wastewater can be more fully, and the mass transfer between chlorine gas and wastewater can be greatly enhanced, so that the active chlorine substances can fully contact with bacteria, and the waste water can be completely separated. deal with.

As shown in FIG. 2 , in yet another optional embodiment, there are multiple gas distribution pipes 321 , and the multiple gas distribution pipes 321 are arranged at intervals along the horizontal direction. It can be understood that a plurality of air distribution pipes 321 are evenly distributed in the containing chamber 310, and waste water is contained in the containing chamber, and the chlorine gas overflowing from the aeration holes 322 can fully mix with the bacteria in the waste water. By arranging a plurality of gas distribution pipes 321, the mixing of the active chlorine substance and the waste water is more uniform and sufficient, and the sterilization effect is improved.

As shown in Figures 1 and 2, in a specific embodiment, the sterilization mechanism 300 includes a stirring assembly, the stirring assembly includes a stirring drive 331 and a plurality of stirring rods 332 connected to the stirring drive 331, and the stirring rod 332 is located at Below the gas distribution pipe 321 , the stirring driver 331 is used to drive the stirring rod 332 to rotate. It can be understood that the stirring rod 332 extends below the liquid level of the waste water, and the liquid is stirred by the stirring rod 332, which accelerates the transfer of active chlorine substances such as chlorine gas to the liquid, so that the active chlorine substances can fully contact with the bacteria in the waste liquid, and the sterilization is improved. Effect. Specifically, the stirring drive member 331 may be a rotating motor.

As shown in FIG. 1 , in one embodiment, the anode chamber 120 has a liquid outlet, and the liquid outlet communicates with the accommodating cavity 310 through a water outlet pipe 540 , and a water outlet power pump 550 is provided on the water outlet pipe 540 . The third impeller of the outlet power pump 550 is connected to the rotating member 410, and the third impeller is driven to rotate by the rotating member 410 to pump the electrolyzed hypochlorite solution into the containing chamber 310 to kill bacteria in the wastewater. The heating chamber 210 of the gas engine 200 is heated by the burner 900, so that the piston 220 reciprocates, drives the rotating member 410 to rotate under the action of the swing rod 420, and then drives the third impeller connected to it to rotate synchronously, thereby realizing the transportation of the fluid. to pump the hypochlorite solution into the holding chamber 310 . Because hypochlorite solution has strong oxidizing properties, it can kill bacteria in wastewater. Through the combined action of chlorine gas and hypochlorite solution, the sterilization effect is improved. The kinetic energy of the gas engine 200 is transmitted to the water outlet power pump 550 through the transmission mechanism, without external power supply or driving parts, reducing the consumption of electric energy.

As shown in Figure 1, in one of the embodiments, the wastewater treatment device 10 includes a hydrogen storage tank 510 and a second power pump 530 connected to the second gas delivery pipe 520, and hydrogen enters the hydrogen storage tank 510 through the cathode gas outlet; the second The second impeller of the power pump 530 is connected to the rotating member 410 , and the second impeller is driven to rotate by the rotating member 410 to pump the hydrogen in the hydrogen storage tank 510 into the burner 900 .

Specifically, the hydrogen storage tank 510 plays the role of temporary storage and buffering. When the air pressure in the hydrogen storage tank 510 reaches a certain value, the hydrogen will flow out from the gas outlet of the hydrogen storage tank 510 and reach the burner 900 . Through the cooperation of the hydrogen storage tank 510 and the second power pump 530, the hydrogen gas can only flow in one direction, that is, the flow direction of the hydrogen gas is from the hydrogen storage tank 510 to the burner 900, so as to avoid backfire phenomenon (that is, the hydrogen gas flows in the first output Combustion in the trachea) to ensure the reliability of heating the gas engine heating chamber 210, thereby converting the kinetic energy of the piston 220 into the kinetic energy of the second power pump 530, ensuring the reliability of the power source of the second power pump 530.

As shown in FIG. 1 , in one embodiment, the wastewater treatment device 10 further includes a water tank 600 , which is connected to the cathode chamber 110 through a water inlet pipe 610 , and the water tank 600 is used to accommodate brine. The water inlet pipe 610 is provided with a water inlet power pump 620, the fourth impeller of the water inlet power pump 620 is connected with the rotating member 410, and the fourth impeller is driven to rotate by the rotating member 410 to pump the brine in the water tank 600 into the electrolysis mechanism. Through the setting of the water tank 600, the water inlet pipe 610 and the water inlet power pump 620, the kinetic energy of the reciprocating motion of the gas engine piston 220 is used to make the water inlet power pump 620 operate, so as to continuously pump the brine in the water tank 600 into the electrolysis mechanism, There is no need to manually inject brine into the electrolysis mechanism, which reduces labor intensity, and can ensure an uninterrupted supply of active chlorine substances, improving the sterilization efficiency and sterilization effect of wastewater. When the electrolyte is waste brine, the water tank 600 can be connected to a device for discharging waste brine through a recovery pipe, so as to recycle the waste brine.

For the wastewater electrolysis device, the gas engine 200 is a Stirling engine, and the electrolyte is waste salt water as an example. The electrolysis mechanism is used to electrolyze the waste brine, so that hydrogen gas is precipitated at the cathode, and chlorine gas is precipitated at the anode. The hydrogen produced by the cathode is sent to the burner 900 to heat the heating chamber 210 of the Stirling engine, thereby converting heat energy into kinetic energy and driving the piston 220 of the Stirling engine to reciprocate. Under the action of the transmission mechanism, the kinetic energy of the reciprocating motion of the piston 220 is converted into the kinetic energy of the first power pump 730 and the water outlet power pump 550, thereby pumping the chlorine gas precipitated from the anode and the hypochlorite solution formed after electrolysis into the containing chamber 310. Waste water to be treated is stored in the accommodation chamber. Under the action of the stirring rod 332 and the aeration hole 322, the active chlorine substances such as chlorine gas are fully contacted with the wastewater, so as to kill the bacteria in the wastewater and improve the sterilization effect. The hydrogen produced by electrolysis is utilized by the Stirling engine as the power source of each power pump, and there is no need to set redundant driving parts to drive the power pump to rotate, which saves electric energy and manufacturing costs, and can improve the utilization rate of hydrogen. In addition, the hypochlorous acid solution is generated after the waste brine is electrolyzed, which weakens the corrosiveness of the waste brine and reduces the pollution to the environment after it is discharged, so that the device can simultaneously treat the waste brine and waste water to a certain extent, and is more convenient to use.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. An apparatus for treating wastewater, comprising:

an electrolysis mechanism including a cathode chamber (110) provided with a cathode electrode and an anode chamber (120) provided with an anode electrode; the anode chamber (120) is provided with an anode gas outlet, and the anode gas outlet is used for discharging chlorine gas generated by electrolyzing and separating brine;

the sterilization mechanism (300) is provided with an accommodating cavity (310), the accommodating cavity (310) is communicated with the anode gas outlet through a first gas conveying pipe (720), and a first power pump (730) is arranged on the first gas conveying pipe (720); the first power pump (730) is used for pumping the chlorine gas into the accommodating cavity (310) through the first gas conveying pipe (720) so as to kill bacteria in the wastewater in the accommodating cavity.

2. Wastewater treatment plant according to claim 1, characterized in that the cathode compartment (110) is provided with a cathode outlet for discharging electrolytically evolved hydrogen;

the waste water treatment device comprises a gas engine (200) and a burner (900), wherein the gas engine (200) comprises a heating chamber (210) and a piston (220) which is connected with the heating chamber (210) in a sliding way; the burner (900) is communicated with the cathode gas outlet through a second gas conveying pipe (520), and the hydrogen can be combusted in the burner (900) to heat the heating chamber (210) so as to push the piston (220) to reciprocate relative to the heating chamber (210);

the first power pump is connected with the piston (220) so as to convert kinetic energy of the reciprocating motion of the piston into kinetic energy of the chlorine pumped into the accommodating cavity by the first power pump.

3. The wastewater treatment apparatus according to claim 2, characterized in that the wastewater treatment apparatus comprises a transmission mechanism, the transmission mechanism comprises a rotating member (410) and a swing link (420) rotatably connected to the rotating member (410);

the rotating piece (410) is connected to a first impeller of the first power pump, and the swing rod (420) is rotationally connected to the piston (220); the piston (220) drives the rotating part (410) to rotate through the swing rod (420), and the rotating part (410) drives the first impeller to synchronously rotate.

4. The wastewater treatment device according to claim 3, wherein the wastewater treatment device comprises a chlorine storage tank (710) connected to the first gas pipe (720), and the chlorine gas enters the chlorine storage tank (710) through the anode gas outlet; the first power pump (730) is used for pumping the chlorine gas in the chlorine storage tank (710) into the accommodating cavity (310).

5. The wastewater treatment device according to claim 4, wherein a gas distribution pipe (321) connected to the first gas pipe (720) is arranged in the accommodating chamber (310), a plurality of spaced aeration holes (322) are arranged on the gas distribution pipe (321), and chlorine gas in the chlorine storage tank (710) enters the accommodating chamber (310) through the aeration holes (322).

6. The wastewater treatment apparatus according to claim 5, wherein the number of the gas distribution pipes (321) is plural, and the plural gas distribution pipes (321) are arranged at intervals in a horizontal direction.

7. The wastewater treatment device according to claim 5, wherein the sterilization mechanism (300) comprises a stirring assembly, the stirring assembly comprises a stirring driving member (331) and a plurality of stirring rods (332) connected to the stirring driving member (331), the stirring rods (332) are located below the gas distribution pipe, and the stirring driving member (331) is used for driving the stirring rods (332) to rotate.

8. The wastewater treatment device according to claim 3, wherein the anode chamber (120) is provided with a liquid outlet, the liquid outlet is communicated with the accommodating chamber (310) through a water outlet pipe (540), and a water outlet power pump (550) is arranged on the water outlet pipe (540); the third impeller of the water outlet power pump (550) is connected with the rotating piece (410), and the third impeller is driven by the rotating piece (410) to rotate so as to pump the electrolyzed hypochlorite solution into the accommodating cavity (310) to kill bacteria in the wastewater in the accommodating cavity.

9. A wastewater treatment plant according to claim 3, characterized in that it comprises a hydrogen storage tank (510) connected to the second gas line (520) and a second power pump (530), the hydrogen gas entering the hydrogen storage tank (510) through the cathode gas outlet; the second impeller of the second power pump (530) is connected to the rotating member (410), and the second impeller is rotated by the rotating member (410) to pump the hydrogen in the hydrogen storage tank (510) into the burner.

10. The wastewater treatment apparatus according to claim 3, further comprising a water tank (600), wherein the water tank (600) is connected to the cathode chamber (110) through a water inlet pipe (610); be provided with into water power pump (620) on inlet tube (610), the fourth impeller of intaking power pump (620) with it connects to rotate piece (410), the fourth impeller quilt rotate piece (410) drive and rotate, with salt water pump income in basin (600) electrolysis mechanism.

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