Novel sulfur autotrophic denitrification nitrogen removal device

Abstract

The utility model relates to the technical field of high-concentration nitrate wastewater, in particular to a novel sulfur autotrophic denitrification nitrogen removal device which comprises a shell, a water inlet and a water outlet, wherein a water outlet area, a separation area, a sulfur autotrophic denitrification reaction area and a filtering area are sequentially arranged in the shell from top to bottom; the water outlet and the water inlet are located in the upper end and the lower end of the shell respectively, and the position of the water outlet area is matched with the position of the water outlet. And the filtering area specifically comprises a gauze layer and a quartz sand cushion layer. According to the utility model, products generated by denitrification precipitate and fall on the quartz sand layer, so that the problem that the water inlet is blocked by the products is avoided; and finally, the device is provided with an internal reflux pipeline, so that the low dissolved oxygen state can be effectively maintained, and the sulfur autotrophic denitrification reaction is facilitated. Meanwhile, the pyrite slag is used as the filler, so that the price is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to high concentration nitrate wastewater technical field especially relates to a new type of sulfur autotrophic denitrification device. BACKGROUND

[0002] Chemical fertilizer manufacturing, catalyst production, smelting steel and the like have important position in social development, and along with the high -speed development of these industries also produced a large amount of containing high concentration nitrate nitrogen wastewater. For example, the nitrate concentration in chemical fertilizer production wastewater is generally 600 ~ 950mg / L, the nitrate concentration in the stainless steel manufacturing process is 1000mg / L, and the nitrate concentration in catalyst wastewater of chemical plant is as high as 1350mg / L. Nitrate is extremely easy to dissolve in water, can migrate rapidly in environmental medium, thereby polluting surface and underground water body.

[0003] Nitrate nitrogen itself is non-toxic, but if converted into nitrite, acute toxicity is strong, and 0.3 ~ 0.5g can be lethal to adult person;After entering natural water body, nitrate can be converted into NH4 + -N, NO2 - -N and the like through a variety of biological or non-biological pathways, and seriously damages ecological environment, such as NH4 + -N can cause nitrogen, phosphorus ratio imbalance, and causes water body eutrophication;Such as NO2 - -N enters drinking water, can oxidize hemoglobin in blood, and produces harm to human health. INVENTION CONTENTS

[0004] The utility model aims at solving the shortcomings in prior art, and proposes a new type of sulfur autotrophic denitrification device.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] Design a new type of sulfur autotrophic denitrification device, including shell, water inlet and water outlet:

[0007] Water outlet and water inlet are located at the upper and lower ends of the shell respectively, and the position of the water outlet and the position of the water outlet are matched with each other;

[0008] The filter area specifically includes gauze layer and quartz sand pad layer.

[0009] The top of the shell is preferably provided with a sealing cover, and the sealing cover is provided with an exhaust hole.

[0010] The top of the shell is preferably provided with a sealing cover, and the sealing cover is provided with an exhaust hole.

[0011] Preferably, a circulating pump is arranged between the effluent area and the sulfur autotrophic denitrification reaction area through a pipeline, and a dissolved oxygen measuring instrument is arranged on the pipeline.

[0012] Preferably, the water inlet is connected with a peristaltic pump.

[0013] Preferably, the quartz sand cushion layer is located at the upper end of the gauze layer, and the thickness of the quartz sand cushion layer is 1-3mm.

[0014] Preferably, the thickness of the gauze layer is 0.2-2mm.

[0015] The novel sulfur autotrophic denitrification device has the advantages that: the device can make the pretreated high nitrate nitrogen wastewater into the sulfur autotrophic denitrification area, and make the wastewater fully contact with sulfur autotrophic denitrification bacteria, so that the purpose of denitrification and sulfur removal is achieved through sulfur autotrophic denitrification; secondly, the product generated by the denitrification is precipitated on the quartz sand layer, so that the problem that the product blocks the water inlet is avoided; finally, the device is provided with an internal reflux pipeline, which can effectively maintain a low dissolved oxygen state, and is beneficial to the sulfur autotrophic denitrification reaction. Meanwhile, the pyrite slag is used as the filler, and the device has the advantage of low price. In summary, the device has the advantages of high efficiency, convenience, low cost and the like in treating high nitrate nitrogen wastewater. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The device is a novel sulfur autotrophic denitrification device.

[0017] In the figure: the peristaltic pump 1, the water inlet 2, the gauze layer 3, the quartz sand cushion layer 4, the sulfur autotrophic denitrification reaction area 5, the separation area 6, the water outlet 7, the effluent area 8, the exhaust hole 9, the sealing cover 10, the dissolved oxygen measuring instrument 11, the circulating pump 12 and the shell 13. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the device will be clearly and completely described below with reference to the drawings in the embodiments of the device. Obviously, the described embodiments are only part of the embodiments of the device, rather than all the embodiments of the device.

[0019] Referring to Figure 1 The device is a novel sulfur autotrophic denitrification device, which comprises a shell 13, a water inlet 2 and a water outlet 7.

[0020] The effluent area 8, the separation area 6, the sulfur autotrophic denitrification reaction area 5 and the filter area are sequentially arranged in the shell 13 from top to bottom.

[0021] The water outlet 7 and the water inlet 2 are respectively located at the upper and lower ends of the shell 13, and the position of the effluent area 8 matches the position of the water outlet 7.

[0022] The filtering zone specifically comprises a gauze layer 3 and a quartz sand mat layer 4.

[0023] A sealing cover 10 is mounted on the top of the shell 13, and an exhaust hole 9 is arranged on the sealing cover 10.

[0024] A circulating pump 12 is arranged between the water outlet zone 8 and the sulfur autotrophic denitrification reaction zone 5 through a pipeline, and a dissolved oxygen measuring instrument 11 is arranged on the pipeline.

[0025] The peristaltic pump 1 is connected with the water inlet 2.

[0026] The quartz sand mat layer 4 is located at the upper end of the gauze layer 3, and the thickness of the quartz sand mat layer 4 is 1-3 mm.

[0027] The thickness of the gauze layer 3 is 0.2-2 mm.

[0028] Peristaltic pump 1, water inlet 2, gauze layer 3, quartz sand mat layer 4, sulfur autotrophic denitrification reaction zone 5, separation zone 6, water outlet 7, water outlet zone 8, exhaust hole 9, sealing cover 10, dissolved oxygen measuring instrument 11, circulating pump 12, shell 13

[0029] The high nitrate nitrogen wastewater pretreated by the sedimentation tank is pumped by the peristaltic pump, and the water inlet mode is from bottom to top. The bottom end is provided with the water inlet 2, the gauze layer 3, the quartz sand mat layer 4, the sulfur autotrophic denitrification reaction zone 5, the separation zone 6 and the water outlet zone 8. The water inlet 2 is connected with the water inlet pipeline at the bottom end of the water inlet zone. The gauze layer 3 and the quartz sand mat layer 4 are used for intercepting the elemental sulfur and other impurities generated by denitrification, so as to solve the problem of blockage at the water inlet end. The bottom end of the water outlet zone 8 is provided with a backflow port, the backflow port is connected with the circulating pump 12 through a backflow pipeline, and the dissolved oxygen measuring instrument 11 is arranged thereon. By adjusting the flow of the circulating pump 12, the dissolved oxygen of the sulfur autotrophic denitrification is controlled, and the denitrification and desulfurization are efficiently completed.

[0030] The filler of the sulfur autotrophic denitrification zone is pyrite slag;

[0031] The top end of the water outlet zone 8 is provided with a detachable sealing cover 10, which is convenient for subsequent addition of pyrite slag and sulfur autotrophic denitrification bacteria. The sealing cover 10 is detachable. The top of the sealing cover 10 is provided with an exhaust hole 9, and the gas generated in the reaction can be discharged through the exhaust hole 9. The water outlet zone 8 is provided with a water outlet 7, which is convenient for sampling and measuring indexes at any time.

[0032] The volume ratio of the gauze layer 3, the quartz sand mat layer 4, the sulfur autotrophic denitrification zone 5, the separation zone 6 and the water outlet zone 8 is 0.6:5:18.9:0.43:2.9.

[0033] The particle size of the quartz sand is 1-3 mm, and the filter cloth is made of polytetrafluoroethylene, and the material diameter is 0.2-2 mm.

[0034] The pretreated high nitrate nitrogen wastewater passes through the peristaltic pump 1, and sequentially passes through the gauze layer 3, the quartz sand mat layer 4, and is fully contacted with the sulfur autotrophic denitrification bacteria attached to the pyrite cinder in the sulfur autotrophic denitrification reaction zone 5.

[0035] Meanwhile, the sulfur autotrophic denitrification is used to synthesize cell autotrophic nutrients with nitrate as inorganic nitrogen source and sulfate as electron donor. After the reaction is completed, the water from the sulfur autotrophic denitrification reaction zone 5 enters the separation zone 6, and gas, liquid and solid are separated here, and then enter the effluent zone 8. The effluent after gravity separation is divided into two parts, one part of the effluent passes through the circulating pump 12 and flows to the reflux pipeline to return to the sulfur autotrophic denitrification reaction zone 5, so as to supplement dissolved oxygen; the dissolved oxygen detector 11 is arranged on the reflux pipeline to realize real-time monitoring. The other part is discharged through the effluent port 7; the top of the effluent zone is provided with a sealing cover 10, which is convenient for subsequent addition of pyrite cinder and sulfur autotrophic denitrification bacteria and can be detached. The exhaust hole 9 is arranged on the cover plate, and the gas is discharged through the exhaust hole 9. The generated sulfur autotrophic denitrification product intercepts the sulfur autotrophic denitrification solid product through the quartz sand mat layer 4 and the gauze layer 3. The problem of easy blockage of the effluent port by the denitrification product is solved.

[0036] The above only describes the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A novel sulfur autotrophic denitrification device, comprising a shell (13), a water inlet (2) and a water outlet (7), characterized in that: The water outlet area (8), the separation area (6), the sulfur autotrophic denitrification reaction area (5) and the filter area are sequentially arranged from top to bottom inside the shell (13); The water outlet (7) and the water inlet (2) are respectively located at the upper and lower ends of the shell (13), and the position of the water outlet area (8) matches the position of the water outlet (7); The filter area specifically comprises a gauze layer (3) and a quartz sand cushion layer (4), the quartz sand cushion layer (4) is located at the upper end of the gauze layer (3), the quartz sand has a particle size of 1-3 mm, and the cushion layer has a thickness of 1-3 mm; The filler filled in the sulfur autotrophic denitrification reaction area (5) is pyrite slag; a circulating pump (12) is connected between the water outlet area (8) and the sulfur autotrophic denitrification reaction area (5) through a pipeline, a dissolved oxygen tester (11) is arranged on the pipeline, the circulating pump (12) and the dissolved oxygen tester (11) are linked, and the dissolved oxygen concentration in the sulfur autotrophic denitrification reaction area (5) can be controlled by adjusting the flow of the circulating pump (12).

2. The novel sulphur autotrophic denitrification device according to claim 1, characterized in that, A sealing cover (10) is mounted on the top of the shell (13), and an exhaust hole (9) is arranged on the sealing cover (10).

3. The novel sulphur autotrophic denitrification device according to claim 2, characterized in that, A circulating pump (12) is arranged between the water outlet area (8) and the sulfur autotrophic denitrification reaction area (5) through a pipeline, and a dissolved oxygen tester (11) is arranged on the pipeline.

4. The novel sulphur autotrophic denitrification device according to claim 3, characterized in that, The water inlet (2) is connected with a peristaltic pump (1).

5. The novel sulphur autotrophic denitrification device according to claim 3, wherein, The quartz sand cushion layer (4) is located at the upper end of the gauze layer (3), and the quartz sand cushion layer (4) has a thickness of 1-3 mm.

6. The novel sulphur autotrophic denitrification device according to claim 5, characterized in that, The thickness of the gauze layer (3) is 0.2-2 mm.

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