A fully mixed multi-stage plug flow oxidation device

Abstract

The present application relates to high concentration organic wastewater treatment technical field, specifically a kind of full-mixed multistage push flow oxidation device, including oxidation device pool body, the oxidation device pool body includes full-mixed oxidation reaction pool group and multistage push flow aerobic reaction pool group, full-mixed oxidation reaction pool group and multistage push flow aerobic reaction pool group are internally provided with reaction device dissolver, full-mixed oxidation reaction pool group inside is also provided with stirrer, the present application is in front end full-mixed aerobic section by stirring realizes the uniformity of the water quality of this section, guarantees the uniform dissolution oxygen of this section, by front end full-mixed aerobic section, guarantee full-mixed aerobic section inside uniform dissolution oxygen, avoid the full play of aerobic treatment capacity before oxygen front end, by the multistage push flow aerobic section of rear section, wastewater COD is gradually reduced, and the aeration intensity of smaller can be used to guarantee the sufficient dissolved oxygen of push flow aerobic section. Finally realize the treatment and reduce high concentration wastewater energy consumption of high concentration wastewater discharge treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-concentration organic wastewater treatment, and particularly relates to a full-mixing multi-stage push-flow oxidation device. BACKGROUND

[0002] The sewage treatment process mainly adopts the activated sludge method and its modified process combined by anaerobic, aerobic and facultative anaerobic processes. Aerobic process is one of the most important methods for sewage treatment, which can remove COD in water, achieve nitrification of ammonia nitrogen in water and remove phosphorus in water.

[0003] The aerobic process is to maintain the dissolved oxygen content in water to be higher than 1.0 mg / L by supplementing oxygen into water, so that aerobic respiration of activated sludge is carried out to allow oxygen microorganisms to grow and reproduce, and organic matter is decomposed into inorganic matter, thereby consuming pollutants in water and removing pollutants in water. The best dissolved oxygen content needs to be controlled to ensure that aerobic microorganisms can carry out efficient aerobic respiration, thereby exerting the maximum effect of the aerobic process. At the same time, the dissolved oxygen cannot be too high, otherwise the sludge will be oxidized by itself, resulting in a decrease in aerobic sludge.

[0004] In the prior art, the following problems exist:

[0005] (1) According to the aerobic tank for treating sewage and the biochemical system containing the aerobic tank disclosed in the Chinese patent with the announcement number CN206886800U, the space of the aerobic tank is divided into a front partial space SBR section, and then two absolute aerobic section spaces according to the water flow direction. Since SBR is a sequencing batch reactor activated sludge method, this method has a concentrated drainage section. The SBR in the concentrated drainage section will cause an impact load on the subsequent absolute aerobic section, thereby causing instability of the entire aerobic treatment system. At the same time, the liquid level of the SBR will be significantly reduced during the drainage stage. In order to ensure the normal operation of the system, the height of the SBR section needs to be increased or a pump suction method needs to be used, thereby increasing the construction and operation cost of the aerobic system.

[0006] (2) At the same time, according to the multi-stage anoxic-aerobic process method and processor disclosed in the Chinese patent with the announcement number CN112794438A, the nitrifying bacteria and aerobic microorganisms are fixed on the filler to grow; the water is fed in a lateral, vertical and other directions to form a multi-dimensional water inlet; and the multi-stage anoxic-aerobic reaction zone is formed by adjusting the water inlet direction and aeration. The problems of this method are as follows: the aerobic state requires sufficient dissolved oxygen in water, and the anoxic state needs to consume the dissolved oxygen in water to make the amount of dissolved oxygen in water insufficient; once the aerobic state of water is formed, it takes a sufficient amount of time, sufficient aerobic microorganisms and dissolved carbon source to consume the dissolved oxygen in water. It is difficult to consume the dissolved oxygen in water in time by adjusting the aeration intensity and water inlet load. It is difficult to smoothly switch the multi-stage anoxic-aerobic process by adjusting the water inlet load and aeration amount. SUMMARY

[0007] The present application aims to provide a full-mixed multi-stage push-flow oxidation device to solve the problems presented in the background.

[0008] The technical solution of the present application is: a full-mixed multi-stage push-flow oxidation device, comprising an oxidation device pool body, the oxidation device pool body comprising a full-mixed oxidation reaction pool group and a multi-stage push-flow aerobic reaction pool group, a reaction device dissolved air apparatus being arranged inside the full-mixed oxidation reaction pool group and the multi-stage push-flow aerobic reaction pool group, and a stirrer being further arranged inside the full-mixed oxidation reaction pool group.

[0009] The full-mixed oxidation reaction pool group comprises a first oxidation reaction pool, a second oxidation reaction pool and an nth oxidation reaction pool, the first oxidation reaction pool, the second oxidation reaction pool and the nth oxidation reaction pool being connected together through oxidation reaction pool connecting pipe fittings, and the connected reaction pools realizing full mixing through large water circulation.

[0010] The multi-stage push-flow aerobic reaction pool group comprises a first-stage push-flow aerobic reaction pool, a second-stage push-flow aerobic reaction pool and an nth-stage push-flow aerobic reaction pool, the first-stage push-flow aerobic reaction pool, the second-stage push-flow aerobic reaction pool and the nth-stage push-flow aerobic reaction pool being connected through push-flow reaction pool connecting pipe fittings.

[0011] Preferably, the outer wall of the first oxidation reaction pool is provided with a full-mixed oxidation reaction zone water inlet pipe and a full-mixed oxidation reaction zone sludge return pipe, and a water passing hole is formed at the lower end of the first oxidation reaction pool, the first oxidation reaction pool being connected to the inside of the first-stage push-flow aerobic reaction pool through the water passing hole, and the first oxidation reaction pool, the second oxidation reaction pool and the nth oxidation reaction pool are all provided with a guide plate.

[0012] Preferably, the outer wall of the first-stage push-flow aerobic reaction pool is provided with a multi-stage push-flow aerobic reaction zone water inlet pipe and a multi-stage push-flow aerobic reaction zone sludge return pipe, and the outer wall of the nth-stage push-flow aerobic reaction pool is provided with a water outlet pipe.

[0013] Preferably, the full-mixed oxidation reaction pool group and the multi-stage push-flow aerobic reaction pool group are both provided with fillers inside.

[0014] Preferably, the stirrer is provided with at least two, the flow directions of the two stirrers being opposite, the positions of the stirrers corresponding to the oxidation reaction pool connecting pipe fittings, and the two stirrers being above and below the guide plate.

[0015] Preferably, the dissolved oxygen concentration inside the full-mixed oxidation reaction pool group is not less than 0.5 mg / L, the difference of the dissolved oxygen concentrations in different regions inside the full-mixed oxidation reaction pool group is not greater than 3.0 mg / L, and the sludge concentration inside the full-mixed oxidation reaction pool group is not less than 3000 mg / L.

[0016] Preferably, the internal dissolved oxygen concentration of each stage of the multi-stage plug flow aerobic reaction tank group is not less than 1.5 mg / L, and the internal sludge concentration of each stage of the multi-stage plug flow aerobic reaction tank group is not less than 2500 mg / L.

[0017] Preferably, the air dissolver of the reaction device can adopt a scattered flow aerator, a micro-porous aerator, a rotary mixing aerator, or a mechanical stirring form.

[0018] The present application provides a full-mixing multi-stage plug flow oxidation device by improvement, which has the following improvements and advantages compared with the prior art:

[0019] Firstly, the present application realizes the uniformity of the water quality in the front-end full-mixing aerobic section through stirring, ensures the uniform dissolved oxygen in the full-mixing aerobic section, ensures the uniform dissolved oxygen in the full-mixing aerobic section through the front-end full-mixing aerobic section, avoids the lack of oxygen in the front end of the aerobic section, fully plays the aerobic treatment capacity, gradually reduces the COD of the wastewater in the multi-stage plug flow aerobic section, and can adopt a smaller aeration intensity to ensure sufficient dissolved oxygen in the plug flow aerobic section. Ultimately, the high-concentration wastewater is treated to meet the discharge standard and the energy consumption of the high-concentration wastewater is reduced.

[0020] Secondly, the full-mixing oxidation reaction tank group and the multi-stage plug flow aerobic reaction tank group of the present application are each composed of multiple tank bodies, and thus sufficient volume oxygen is ensured in the multi-stage plug flow aerobic section, the COD of the wastewater is gradually reduced in the multi-stage plug flow aerobic section, and the tank bodies can be assembled according to the specific conditions of the user, facilitating the use in different conditions and increasing the use effect of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further explained below in combination with the drawings and examples:

[0022] Fig. 1 is a schematic diagram of the three-dimensional structure of the present application;

[0023] Fig. 2 is a graph of the change of the COD in the water inlet and each tank of the present application;

[0024] Fig. 3 is a graph of the change of the dissolved oxygen in each tank of the present application.

[0025] Explanation of reference signs: 1, oxidation device pool body, 2, fully mixed oxidation reaction pool group, 201, first oxidation reaction pool, 202, second oxidation reaction pool, 203, nth oxidation reaction pool, 3, multi-stage plug flow aerobic reaction pool group, 301, first-stage plug flow aerobic reaction pool, 302, second-stage plug flow aerobic reaction pool, 303, nth-stage plug flow aerobic reaction pool, 4, oxidation reaction pool connecting pipe fitting, 5, fully mixed oxidation reaction zone water inlet pipe, 6, multi-stage plug flow aerobic reaction zone water inlet pipe, 7, multi-stage plug flow aerobic reaction zone sludge return pipe, 8, water outlet pipe, 9, reaction device aerator, 10, agitator, 11, plug flow reaction pool connecting pipe fitting, 12, fully mixed oxidation reaction zone sludge return pipe. DETAILED DESCRIPTION

[0026] The present application will be described in detail below, and the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] The present application provides a full-mixed multi-stage plug flow oxidation device by improvement, and the technical solutions of the present application are:

[0028] Embodiment one:

[0029] As shown in Figs. 1-3 A full-mixed multi-stage plug flow oxidation device, the oxidation device pool body 1 includes a fully mixed oxidation reaction pool group 2 and a multi-stage plug flow aerobic reaction pool group 3, the fully mixed oxidation reaction pool group 2 and the multi-stage plug flow aerobic reaction pool group 3 are internally provided with a reaction device aerator 9, and the fully mixed oxidation reaction pool group 2 is further provided with an agitator 10. The reaction device aerator 9 of this structure can play the role of aeration, and oxygen is introduced into the fully mixed oxidation reaction pool group 2 and the multi-stage plug flow aerobic reaction pool group 3 through the reaction device aerator 9, and the agitator 10 can push the sewage inside the fully mixed oxidation reaction pool group 2 to move, thereby increasing the mixing flow effect of the sewage inside the fully mixed oxidation reaction pool group 2;

[0030] The full-mixing oxidation reaction pool group 2 comprises a first oxidation reaction pool 201, a second oxidation reaction pool 202 and an nth oxidation reaction pool 203, the first oxidation reaction pool 201, the second oxidation reaction pool 202 and the nth oxidation reaction pool 203 are connected in series through the oxidation reaction pool connecting pipe 4, and the series-connected reaction pools realize full mixing through large water circulation, the full-mixing oxidation reaction pool group 2 is composed of the first oxidation reaction pool 201, the second oxidation reaction pool 202 and the nth oxidation reaction pool 203, and the first oxidation reaction pool 201, the second oxidation reaction pool 202 and the nth oxidation reaction pool 203 can expand the actual use equipment, so that the device can process different sewage quantities;

[0031] The multi-stage plug-flow aerobic reaction pool group 3 comprises a first-stage plug-flow aerobic reaction pool 301, a second-stage plug-flow aerobic reaction pool 302 and an nth-stage plug-flow aerobic reaction pool 303, the first-stage plug-flow aerobic reaction pool 301, the second-stage plug-flow aerobic reaction pool 302 and the nth-stage plug-flow aerobic reaction pool 303 are connected through the plug-flow reaction pool connecting pipe 11, the first-stage plug-flow aerobic reaction pool 301, the second-stage plug-flow aerobic reaction pool 302 and the nth-stage plug-flow aerobic reaction pool 303 of the structure can be connected through the plug-flow reaction pool connecting pipe 11, so that the first-stage plug-flow aerobic reaction pool 301, the second-stage plug-flow aerobic reaction pool 302 and the nth-stage plug-flow aerobic reaction pool 303 can be individually disassembled, and the first-stage plug-flow aerobic reaction pool 301, the second-stage plug-flow aerobic reaction pool 302 and the nth-stage plug-flow aerobic reaction pool 303 form multi-stage aerobic sections, thereby improving the sewage treatment effect.

[0032] The first oxidation reaction pool 201 is provided with a full-mixing oxidation reaction zone water inlet pipe 5 and a full-mixing oxidation reaction zone sludge return pipe 12 on the outer wall, and a water passing hole 14 is formed at the lower end of the first oxidation reaction pool 201, the first oxidation reaction pool 201 is connected in communication with the inside of the first-stage plug-flow aerobic reaction pool 301 through the water passing hole 14, and the first oxidation reaction pool 201, the second oxidation reaction pool 202 and the nth oxidation reaction pool 203 are all provided with a guide plate 13, the full-mixing oxidation reaction zone water inlet pipe 5 of the outer wall of the first oxidation reaction pool 201 plays a role of water inlet, and the water quantity in the first oxidation reaction pool 201 is supplemented, the first oxidation reaction pool 201 is connected in communication with the inside of the first-stage plug-flow aerobic reaction pool 301 through the water passing hole 14, and the sewage in the first oxidation reaction pool 201 enters the first-stage plug-flow aerobic reaction pool 301 through the water passing hole 14.

[0033] The outer wall of the first-stage push-flow aerobic reaction tank 301 is provided with a plurality of push-flow aerobic reaction zone water inlet pipes 6 and a plurality of push-flow aerobic reaction zone sludge return pipes 7; the outer wall of the n-stage push-flow aerobic reaction tank 303 is provided with a water outlet pipe 8; the first-stage push-flow aerobic reaction tank 301 serves as the first reaction tank of the multi-stage push-flow aerobic reaction tank, and the sewage in the first-stage push-flow aerobic reaction tank 301 can flow towards the n-stage push-flow aerobic reaction tank 303, and finally enter the sedimentation tank through the water outlet pipe 8.

[0034] The full-mixing oxidation reaction tank group 2 and the multi-stage push-flow aerobic reaction tank group 3 are internally provided with fillers, and the fillers in the structure are not shown in the figure and will not reduce the effective volume of the aerobic tank, and improve the sewage treatment effect.

[0035] The agitator 10 is provided with at least two, and the flow directions of the agitators 10 are opposite, and the agitators 10 correspond to the positions of the oxidation reaction tank connecting pipes 4, and the two agitators 10 are above and below the guide plate 13, and the agitator 10 of the structure plays a role in pushing the sewage, so that the sewage can circulate in the full-mixing oxidation reaction tank group 2, improve the mixing flow effect of the sewage, make the oxygen concentration in the sewage more average, and avoid the situation that the oxygen concentration in the full-mixing oxidation reaction tank group 2 is too high or too low in a certain part.

[0036] The dissolved oxygen concentration in the full-mixing oxidation reaction tank group 2 is not less than 0.5 mg / L, the difference between the dissolved oxygen concentrations in different regions of the full-mixing oxidation reaction tank group 2 is not greater than 3.0 mg / L, and the sludge concentration in the full-mixing oxidation reaction tank group 2 is not less than 3000 mg / L.

[0037] The dissolved oxygen concentration in each stage of the multi-stage push-flow aerobic reaction tank group 3 is not less than 1.5 mg / L, and the sludge concentration in each stage of the multi-stage push-flow aerobic reaction tank group 3 is not less than 2500 mg / L.

[0038] The reaction device gas dissolver 9 can adopt a scattered flow aerator, a microporous aerator, a rotary mixing aerator, or a mechanical stirring form, and the reaction device gas dissolver 9 of the structure plays a role in aeration and introduces oxygen into the sewage.

[0039] Working principle: first, the device is set in the appropriate place, then in the process of use, through the whole mixed oxidation reaction zone water inlet pipe 5 into the water to the first oxidation reaction tank 201, while the first oxidation reaction tank 201 inside the agitator 10 can push the sewage circulation flow, while the first oxidation reaction tank 201, the second oxidation reaction tank 202 and the n oxidation reaction tank 203 inside the sewage can be mixed by oxidation reaction tank connecting pipe 4 each other, improve the flow effect of sewage, and the first oxidation reaction tank 201 inside the sewage can enter the first stage push flow aerobic reaction tank 301 through the water hole 14, the first stage push flow aerobic reaction tank 301 inside the sewage can move to the direction of the n stage push flow aerobic reaction tank 303, while through the reaction device dissolved air apparatus 9 to the whole mixed oxidation reaction tank group 2 and multistage push flow aerobic reaction tank group 3 inside the sewage aeration work, finally the n stage push flow aerobic reaction tank 303 inside the sewage through the water outlet pipe 8 into the sedimentation tank for cleaning separation, while recycling aerobic sludge, the recycling sludge through the whole mixed oxidation reaction tank sludge backflow pipe 12 into the first oxidation reaction tank 201.

[0040] The above description enables those skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A completely mixed multi-stage plug flow oxidation device comprising an oxidation device tank (1), characterized by: The oxidation device pool body (1) comprises a complete mixing oxidation reaction pool group (2) and a multi-stage plug flow aerobic reaction pool group (3), reaction device dissolvers (9) are arranged in the complete mixing oxidation reaction pool group (2) and the multi-stage plug flow aerobic reaction pool group (3), and a stirrer (10) is further arranged in the complete mixing oxidation reaction pool group (2); The complete mixing oxidation reaction pool group (2) comprises a first oxidation reaction pool (201), a second oxidation reaction pool (202) and an n-th oxidation reaction pool (203), the first oxidation reaction pool (201), the second oxidation reaction pool (202) and the n-th oxidation reaction pool (203) are connected in series through oxidation reaction pool connecting pipes (4), and complete mixing is realized through large water circulation of the series-connected reaction pools; The multi-stage plug flow aerobic reaction pool group (3) comprises a first-stage plug flow aerobic reaction pool (301), a second-stage plug flow aerobic reaction pool (302) and an n-th-stage plug flow aerobic reaction pool (303), and the first-stage plug flow aerobic reaction pool (301), the second-stage plug flow aerobic reaction pool (302) and the n-th-stage plug flow aerobic reaction pool (303) are connected through plug flow reaction pool connecting pipes (11); The outer wall of the first oxidation reaction pool (201) is provided with a complete mixing oxidation reaction zone water inlet pipe (5) and a complete mixing oxidation reaction zone sludge backflow pipe (12), a water passing hole (14) is formed in the lower end of the first oxidation reaction pool (201), the first oxidation reaction pool (201) is connected with the inside of the first-stage plug flow aerobic reaction pool (301) through the water passing hole (14), and the inside of the first oxidation reaction pool (201), the second oxidation reaction pool (202) and the n-th oxidation reaction pool (203) is provided with a guide plate (13); The stirrer (10) is provided with at least two, the flow directions of the stirrers (10) are opposite, the positions of the stirrers (10) correspond to the oxidation reaction pool connecting pipes (4), and the two stirrers (10) are arranged above and below the guide plate (13).

2. A completely mixed multi-stage plug flow oxidation device according to claim 1, characterized in that: The outer wall of the first-stage plug flow aerobic reaction pool (301) is provided with a multi-stage plug flow aerobic reaction zone water inlet pipe (6) and a multi-stage plug flow aerobic reaction zone sludge backflow pipe (7), and the outer wall of the n-th-stage plug flow aerobic reaction pool (303) is provided with a water outlet pipe (8).

3. A completely mixed multi-stage plug flow oxidation device according to claim 1, characterized in that: The complete mixing oxidation reaction pool group (2) and the multi-stage plug flow aerobic reaction pool group (3) are internally provided with fillers.

4. A completely mixed multi-stage plug flow oxidation device according to claim 1, characterized in that: The internal dissolved oxygen concentration of the complete mixing oxidation reaction pool group (2) is not less than 0.5 mg / L, the difference between the dissolved oxygen concentrations of different regions in the complete mixing oxidation reaction pool group (2) is not greater than 3.0 mg / L, and the sludge concentration in the complete mixing oxidation reaction pool group (2) is not less than 3000 mg / L.

5. A completely mixed multi-stage plug flow oxidation device according to claim 1, characterized in that: The internal dissolved oxygen concentration of each stage of the multi-stage plug flow aerobic reaction pool group (3) is not less than 1.5 mg / L, and the sludge concentration in each stage of the multi-stage plug flow aerobic reaction pool group (3) is not less than 2500 mg / L.

6. A completely mixed multi-stage plug flow oxidation device according to claim 1, characterized in that: The reaction device dissolver (9) adopts one of a scattered flow aerator, a microporous aerator and a rotary mixing aerator.

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