CN217868328U - Internal and external superposition combined sewage denitrification device - Google Patents

Abstract

The utility model relates to an inside and outside stack combination sewage denitrification device, belong to the environmental protection equipment field, solved area big, unsuitable for the denitrogenation treatment of land used nervous industrial and mining enterprise sewage, the higher problem of energy consumption, including outer lane jar body and the inner circle jar body of setting in the outer lane jar body, form the reaction chamber between outer lane jar body and the inner circle jar body, be provided with first baffle and second baffle along the anticlockwise in the reaction chamber, divide into anoxic zone and aerobic zone through first baffle, second baffle with the reaction chamber, the inside bottom of aerobic zone is provided with a plurality of gas distribution systems along its circumference, the lower part of second baffle is provided with the air stripping back flow that is used for carrying sewage from the aerobic zone to the anoxic zone; the sewage treatment system also comprises a sewage guide assembly, wherein the sewage guide assembly comprises a water inlet pipe, an aerobic water outlet weir channel, a central guide cylinder and a water outlet weir channel; has the effects of compact structure, simple operation and extremely low energy consumption, and can finish denitrification under the condition of small occupied area.

Description

Internal and external superposition combined sewage denitrification device

Technical Field

The utility model belongs to the environmental protection equipment field relates to an inside and outside stack combination sewage denitrification device.

Background

The treatment process for degrading organic matters by wastewater is various, and the prior industry uses a plurality of denitrification processes such as A/O, A/A/O and the like, namely, the denitrification processes are completed by ammoniation, nitrification and denitrification and are connected with a sedimentation tank;

the existing patent publication No. "CN210393892U" kilometers opens a multistage AO denitrification device, it is formed from several stages of anaerobic section/aerobic section and sedimentation tank, every stage of anaerobic section/aerobic section is formed from connecting anoxic tank and aerobic tank, the adjacent sand oxygen section/aerobic section are series-connected, the water outlet of water inlet pipe is respectively connected with the water inlet of every stage of anoxic tank, in every stage of anoxic tank a stirrer is set, every stage of anoxic tank and aerobic tank are respectively equipped with pneumatic butterfly valve, the lower portion of aerobic tank is equipped with aeration pipe, the aerobic tank water outlet of last stage of anaerobic section/aerobic section is connected with sedimentation tank water inlet pipe by means of biochemical tank water outlet pipe and pipeline, the sedimentation tank water inlet pipe is connected with sedimentation tank bottom water inlet pipe by means of pipeline, the water outlets of two sides of upper portion of sedimentation tank are connected with supernatant water outlet pipe, and the bottom sludge discharge port is connected with sludge pipe. The process conditions can be independently and optimally controlled at each stage through multi-stage AO denitrification, and the whole system ensures that the nitrification and denitrification reaction conditions are more stable, so that the efficient operation of nitrification and denitrification is ensured, and the denitrification efficiency of the whole system can reach more than 95 percent.

However, the above description has a problem that when denitrification treatment is performed on sewage, since the sewage is composed of a plurality of stages of anaerobic/aerobic sections and a sedimentation tank connected in series, the occupied area is large, and the sewage is not suitable for denitrification treatment of sewage of industrial and mining enterprises with tight land, and besides, the energy consumption is high when the sewage is sequentially conveyed to the plurality of stages of anaerobic/aerobic sections through pneumatic butterfly valves.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an inside and outside stack combination sewage denitrification device has solved area big, unsuitable denitrification treatment, the higher problem of energy consumption that are used for the nervous industrial and mining enterprise sewage of land used.

In order to achieve the purpose, the utility model adopts the technical proposal that:

the utility model provides an inside and outside stack combination sewage denitrification device, including the outer lane jar body and set up the internal inner circle jar body of outer lane jar, the external diameter of the internal circle jar body is less than the internal diameter of the outer lane jar body, form the reaction chamber between the outer lane jar body and the inner circle jar body, be provided with first baffle and second baffle along the anticlockwise in the reaction chamber, will divide into anoxic zone and aerobic zone through first baffle, second baffle the reaction chamber, the inside bottom of aerobic zone is provided with a plurality of gas distribution systems along its circumference, the height of first baffle is less than the height of the outer lane jar body, the internal circle jar body, the lower part of second baffle is provided with the air stripping back flow that is used for carrying sewage from the aerobic zone to the anoxic zone;

still include waste water diversion subassembly, waste water diversion subassembly includes inlet tube, good oxygen play water weir canal, central draft tube and play water weir canal, the inlet tube sets up in the anoxic zone and its outlet end extend to the lower part in anoxic zone, good oxygen play water weir canal sets up the top in aerobic zone and with the inlet tube sets up mutually back on the back, it sets up to go out the water weir canal the top of the inner circle jar body, the vertical setting of central draft tube is in its bottom extends to the internal portion of inner circle jar, good oxygen play water weir canal be provided with the draft tube pipeline of central draft tube intercommunication, be provided with the waste water exhaust drain pipe after will handling on the play water weir canal, the bottom of the inner circle jar body be provided with be used for with the internal mud of inner circle jar flows back to the mud back flow in the anoxic zone.

Furthermore, a plurality of water distributors are arranged at the water outlet end of the water inlet pipe.

Furthermore, the bottom of the inner ring tank body is arranged in a conical shape.

Further, the included angle between the conical outer surface of the bottom of the inner ring tank body and the bottom of the outer ring tank body is not less than 55 degrees.

Further, the outer ring tank body and the inner ring tank body are both made of 304 stainless steel or carbon steel coated with coal tar pitch epoxy.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses an inside and outside stack combination sewage denitrification device, through the inner tank body, the stack of the outer lane jar body forms a reaction chamber, and be provided with first baffle along the circumference anticlockwise of reaction chamber, the second baffle, cut apart into anoxic zone and aerobic zone with the reaction chamber through first baffle and second baffle, when handling sewage, sewage takes place nitration earlier in the aerobic zone and generates nitrate nitrogen, the sewage that contains a large amount of nitrate nitrogen passes through the air stripping back flow and flows into the anoxic zone once more and take place denitrification in taking place nitrate nitrogen and turn into nitrogen gas and discharge in the anoxic zone afterwards, thereby accomplish the purpose of denitrogenation, this device compact structure, denitrification is accomplished under the condition of area as far as possible to this device, volume load is high, the operation is simple, the energy consumption is extremely low, especially adapted contains the denitrogenation of high ammonia nitrogen waste water land use nervous industrial and mining enterprises simultaneously.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a top view of the overall structure of the preferred embodiment of the present invention;

fig. 2 is a sectional view showing the overall structure of the preferred embodiment of the present invention.

Wherein the reference numerals are as follows:

1. an outer ring tank body; 2. an inner ring tank body; 3. a reaction chamber; 31. an anoxic zone, 32 and an aerobic zone; 4. a sludge return pipe; 5. a gas distribution system; 6. a wastewater diversion assembly; 61. a water inlet pipe; 62. an aerobic effluent weir channel; 63. a central draft tube; 64. a water outlet weir channel; 65. a draft tube conduit; 66. a drain pipe; 71. a first separator; 72. a second separator; 8. a water distributor; 9. a gas stripping return pipe.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and fig. 2, for the utility model provides an inside and outside superposition combined sewage denitrification device, including the outer lane jar body 1 and the inner circle jar body 2 of setting in the outer lane jar body 1, the external diameter of the inner circle jar body 2 is less than the internal diameter of the outer lane jar body 1, form the reaction chamber 3 between the outer lane jar body 1 and the inner circle jar body 2, be provided with first baffle 71 and second baffle 72 along anticlockwise direction in the reaction chamber 3, divide the reaction chamber 3 into anoxic zone 31 and aerobic zone 32 through first baffle 71, second baffle 72, be provided with a plurality of gas distribution systems 5 along its circumference in the inside bottom of aerobic zone 32, the height of first baffle 71 is less than the height of the outer lane jar body 1, the inner circle jar body 2, make things convenient for the sewage in the anoxic zone 31 to overflow to the aerobic zone 32; the lower part of the second clapboard 72 is provided with a gas stripping return pipe 9 which returns the mixed liquid in the aerobic zone 32 to the anoxic zone 31 again; wherein, the anoxic zone 31 and the aerobic zone 32 are both inoculated with sludge for degrading organic matters in the sewage, the sludge in the anoxic zone 31 is attached with anaerobic denitrifying bacteria, and the sludge in the aerobic zone 32 is attached with aerobic nitrifying bacteria; the gas distribution system 5 at the bottom of the aerobic zone 32 supplies oxygen required by the microbial reaction to the aerobic zone 32, fully mixes the sewage and the sludge, and provides certain power for the flowing of the sewage;

the sewage treatment device is characterized by further comprising a sewage diversion assembly 6, the sewage diversion assembly 6 comprises a water inlet pipe 61, an aerobic water outlet weir channel 62, a central diversion cylinder 63 and a water outlet weir channel 64, the water inlet pipe 61 is arranged in the anoxic zone 31, a water outlet end of the water inlet pipe extends to the lower part of the anoxic zone 31, the aerobic water outlet weir channel 62 is arranged at the top of the aerobic zone 32 and is arranged back to the water inlet pipe 61, the water outlet weir channel 64 is arranged at the top of the inner ring tank body 2, the central diversion cylinder 63 is vertically arranged in the inner ring tank body 2, a bottom end of the central diversion cylinder extends to the inner part of the inner ring tank body 2, the aerobic water outlet weir channel 62 is provided with a diversion cylinder pipeline 65 communicated with the central diversion cylinder 63, a drain pipe 66 for discharging treated sewage is arranged on the water outlet weir channel 64, and a sludge return pipe 4 for returning sludge in the inner ring tank body to the anoxic zone 31 is arranged at the bottom of the inner ring tank body 2.

Referring to fig. 1 and 2, in operation, high ammonia nitrogen-containing sewage enters an anoxic zone 31 from top to bottom through a water inlet pipe 61, dissolved oxygen is kept in the anoxic zone 31 at 0.2-0.5 mg/L, when the water amount in the anoxic zone 31 reaches a certain amount, the sewage overflows from the top of a first partition plate 71 to an aerobic zone 32, ammonia nitrogen in the sewage is nitrified into nitrate nitrogen by aerobic nitrifying bacteria under the condition that the aerobic zone 32 is oxygenated, then a large amount of nitrate nitrogen flows back to the anoxic zone 31 through an air stripping return pipe 9, under the condition that the anoxic zone 32 is anoxic, the nitrate nitrogen is reduced into pollution-free nitrogen through the action of anaerobic denitrifying bacteria and escapes into the external atmosphere, so that the purpose of denitrification is achieved, then the sewage subjected to denitrification overflows to the aerobic zone 32 again and flows into an aerobic effluent weir channel 62, muddy water enters a buffer layer from top to bottom and then is separated through gravity, sludge is deposited at the bottom of an inner ring tank body 2 and flows back into the anoxic zone 31 through a sludge return pipe 4, and then the mixed liquor flows back into an effluent weir ring 2 after a certain amount of the effluent weir ring 2, the mixed liquor is connected with an effluent drain pipe 64 at the upper end of an overflow drain pipe 64; wherein, the bottom of central draft tube 63 is located the middle part position of 2 direction of height of the inner circle jar body, can get into through gravity separation behind the buffer layer with the muddy water mixed liquid top-down after the denitrogenation through central draft tube 63, can not influence overflowing of 2 upper clear waters of the inner circle jar body at the in-process of mud, separation of water.

Further, referring to fig. 1 and 2, the water outlet end of the water inlet pipe 61 is provided with a plurality of water distributors 8, and water is distributed uniformly by the water distributors 8, so that wastewater to be treated uniformly and stably enters the treatment system, and the influence on the microbial treatment effect due to large inlet water fluctuation is prevented.

Further, referring to fig. 1 and 2, the bottom of the inner ring tank 2 is disposed in a conical shape, and an included angle between the conical outer surface of the bottom of the inner ring tank 2 and the bottom of the outer ring tank 1 is not less than 55 °. The sludge is convenient to settle to the bottom of the inner ring tank body through the conical arrangement and is not easy to adhere to the inner wall of the inner ring tank body 2, and the sludge is convenient to flow back into the reaction cavity from the return pipe.

Further, referring to fig. 1 and 2, the outer ring tank 1 and the inner ring tank 2 are both made of 304 stainless steel or carbon steel coated with coal tar epoxy, and the material has corrosion resistance, so that the service life of the outer ring tank 1 and the inner ring tank 2 can be prolonged.

In summary, the following steps: a reaction cavity 3 is formed by overlapping an inner tank body 2 and an outer tank body 1, a first partition plate 71 and a second partition plate 72 are arranged anticlockwise along the circumferential direction of the reaction cavity 3, the reaction cavity 3 is divided into an anoxic zone 31 and an aerobic zone 32 by the first partition plate 31 and the second partition plate 32, when sewage is treated, nitrification reaction is firstly carried out on the sewage in the aerobic zone 32 to generate nitrate nitrogen, then the sewage containing a large amount of nitrate nitrogen flows into the anoxic zone 31 again through a gas stripping return pipe 5 to generate denitrification reaction to convert the nitrate nitrogen into nitrogen and discharge, and therefore the aim of denitrification is fulfilled.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (5)

1. The internal and external superposition combined sewage denitrification device is characterized by comprising an outer ring tank body (1) and an inner ring tank body (2) arranged in the outer ring tank body (1), wherein the outer diameter of the inner ring tank body (2) is smaller than the inner diameter of the outer ring tank body (1), a reaction cavity (3) is formed between the outer ring tank body (1) and the inner ring tank body (2), a first partition plate (71) and a second partition plate (72) are arranged in the reaction cavity (3) along the anticlockwise direction, the reaction cavity (3) is divided into an anoxic zone (31) and an aerobic zone (32) through the first partition plate (71) and the second partition plate (72), a gas distribution system (5) is arranged at the inner bottom end of the aerobic zone (32) along the circumferential direction of the aerobic zone, the height of at least part of the top edge of the first partition plate (71) is smaller than the height of the outer ring tank body (1) and the height of the inner ring tank body (2), and the lower part of the second partition plate (72) is provided with a gas stripping zone (9) for conveying sewage from the aerobic zone (32) to the anoxic zone (31);

still include waste water conservancy diversion subassembly (6), waste water conservancy diversion subassembly (6) include inlet tube (61), good oxygen play weir canal (62), central draft tube (63) and play weir canal (64), inlet tube (61) set up in anoxic zone (31) and its water outlet extend to the lower part in anoxic zone (31), good oxygen play weir canal (62) set up the top in aerobic zone (32) and with inlet tube (61) set up mutually, play weir canal (64) set up the top of the inner circle jar body (2), center draft tube (63) vertical setting is in its bottom extends to in the inner circle jar body (2) inside the inner circle jar body (2), good oxygen play weir canal (62) be provided with draft tube pipeline (65) of center draft tube (63) intercommunication, be provided with waste water discharge's drain pipe (66) after will handling on play weir canal (64), the bottom of the inner circle jar body (2) be provided with be used for with the inner circle jar body (2) in the sludge reflux pipe (31) to the oxygen return flow district (4).

2. The internal and external superposition combined sewage denitrification device according to claim 1, wherein the water outlet end of the water inlet pipe (61) is provided with a plurality of water distributors (8).

3. The combined sewage denitrification apparatus with internal and external superposition as set forth in claim 1 or 2, wherein the bottom of the inner tank body (2) is conical.

4. The sewage denitrification device combining an inside and an outside superposition as set forth in claim 3, wherein an angle between the conical outer surface of the bottom of the inner ring tank (2) and the bottom of the outer ring tank (1) is not less than 55 °.

5. The internal and external superposition combined sewage denitrification device according to claim 4, wherein the outer ring tank body (1) and the inner ring tank body (2) are both made of 304 stainless steel or carbon steel coated with coal tar pitch epoxy.

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