Duplex denitrification reactor

Abstract

The utility model relates to a duplex denitrification reactor, which belongs to the technical field of sewage treatment and comprises two tank bodies stacked up and down, a lifting lug is arranged at the top of each tank body, a positioning groove matched with the lifting lug is arranged at the bottom of each tank body, and the lifting lug of the lower tank body is positioned and accommodated in the positioning groove of the upper tank body. A resin baffle plate and a filter plate are vertically distributed in each tank body, denitrification resin is filled between the resin baffle plate and the filter plate, the upper end and the lower end of each tank body are respectively connected with a water outlet quick joint and a water inlet quick joint and are respectively positioned above the resin baffle plate and below the filter plate, and a resin discharge quick joint communicated with the denitrification resin is arranged at the lower part of each tank body. The reactor is small in occupied area, low in energy consumption, low in maintenance cost, stable in operation, high in applicability and suitable for deep denitrification of sewage plants of various sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a double denitrification reactor. Background Art

[0002] The total nitrogen in the tail water discharged from urban sewage treatment plants is mainly nitrate nitrogen. Nitrate nitrogen removal technologies are mainly divided into biological methods, membrane separation methods, resin ion exchange methods, etc. The biological method uses denitrifying bacteria to degrade nitrate into nitrogen gas. The application scope of the biological method is limited and the process conditions are difficult to control. The membrane separation method is subject to certain restrictions in application due to problems such as high treatment costs, high pre-treatment requirements, and easy secondary pollution. The resin adsorption ion exchange denitrification method has the characteristics of mature technology, simple regeneration, convenient operation and management, high nitrate removal rate, and low operating costs. The regenerated waste liquid can be denitrified by domesticated microorganisms by adding carbon sources, making this technology an important technology for deep denitrification in sewage treatment.

[0003] Currently, commonly used resin denitrification equipment is filled with a fixed amount of resin inside the equipment, and the amount of nitrate adsorbed by the denitrification resin is also fixed. Once the resin is saturated with adsorption, water intake must be stopped and the resin must be regenerated with brine before use. Traditional resin denitrification equipment uses a single-tank design, which occupies a large area, has a simple operating procedure, and low equipment efficiency. Furthermore, the water distribution pipes of traditional resin denitrification equipment use a main pipe-straight pipe design, which has a small filtration area and high water resistance. The resin baffle uses a flat mesh / pore structure to intercept the resin, which has a small filtration area and high water resistance.

[0004] Therefore, it is necessary to design a dual denitrification reactor to overcome the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a double denitrification reactor with small footprint, low energy consumption, low maintenance cost, stable operation and strong applicability, which is suitable for deep denitrification of sewage treatment plants of all sizes.

[0006] The utility model provides a double denitrification reactor, comprising: two tank bodies stacked up and down, each tank body is provided with a lifting ear on the top and a positioning groove matching the lifting ear on the bottom, the lifting ear of the lower tank body is positioned and accommodated in the positioning groove of the upper tank body, resin baffles and filter plates are distributed up and down in each tank body, denitrification resin is filled between the resin baffles and the filter plates, the upper and lower ends of the tank body are respectively connected to a water outlet quick connector and a water inlet quick connector, and are respectively located above the resin baffle and below the filter plate, and the lower part of the tank body is provided with a resin discharge quick connector connected to the denitrification resin.

[0007] Furthermore, the tank has a diameter of 2.8-3.6m, a height of 4-5m and is made of stainless steel.

[0008] Furthermore, the filter plate is an arc-shaped structure with a low middle and high surroundings.

[0009] Furthermore, the filter plate includes a plurality of filter rings distributed sequentially from the center to the periphery and concentrically arranged, and a connecting rod connecting the plurality of filter rings. The height of the filter plate accounts for 10% to 15% of the height of the tank body.

[0010] Furthermore, multiple filter rings are evenly distributed, with a distance of 0.1-0.2 mm between two adjacent filter rings, and are made of stainless steel.

[0011] Furthermore, the center of the filter plate is connected to the resin discharge quick connector.

[0012] Furthermore, the resin baffle is a broken line structure.

[0013] Furthermore, the bending angle of the resin baffle is 90°.

[0014] Furthermore, the resin baffle is made of multiple bars arranged in parallel, made of stainless steel, with a spacing of 0.1 to 0.2 mm between two adjacent bars.

[0015] Furthermore, the height of the resin baffle accounts for 3%-8% of the height of the tank body.

[0016] The utility model has the following advantages and beneficial effects:

[0017] 1. The reactor adopts a double structure of upper and lower tanks, each tank operates independently, saving space;

[0018] 2. The water inlet, outlet and resin discharge port of each tank are equipped with quick connectors and metal hoses, which are easy to disassemble and transport;

[0019] 3. The filter plate used for water inlet and distribution has a large filtering area, uniform water distribution, small water resistance and energy saving;

[0020] 4. The resin baffle adopts a broken line structure, which has a large filtering area, small water resistance and energy saving;

[0021] 5. The reactor is equipped with an inspection hole to facilitate equipment maintenance;

[0022] 6. The reactor is equipped with a resin discharge port to facilitate resin discharge and filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a dual denitrification reactor according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a tank body according to a preferred embodiment of the present invention;

[0025] Figure 3This is a schematic structural diagram of a resin baffle according to a preferred embodiment of the present invention;

[0026] Figure 4 This is a structural diagram of a filter plate according to a preferred embodiment of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the bottom of the tank body according to a preferred embodiment of the present invention;

[0028] Description of Figure Numbers:

[0029] 1. Lifting lug, 2. Water outlet quick connector, 3. Water inlet quick connector, 4. Resin discharge quick connector, 5. Tank body, 6. Inspection manhole, 7. Resin baffle, 8. Filter plate, 9. Positioning groove, 10. Denitrification resin. DETAILED DESCRIPTION

[0030] For a better understanding of the present invention, the following embodiments are provided to further illustrate the present invention, but the present invention is not limited to the following embodiments.

[0031] like Figures 1 to 5 As shown, a dual denitrification reactor comprises two tank bodies 5 stacked one above the other.

[0032] Among them, each tank body 5 is provided with a lifting ear 1 on the top and a positioning groove 9 matching the lifting ear 1 on the bottom. The lifting ear 1 of the lower tank body 5 is positioned and accommodated in the positioning groove 9 of the upper tank body 5. Figure 1 、 Figure 2 and Figure 5 Each tank body 5 is provided with a resin baffle 7 and a filter plate 8 distributed above and below, and a denitrification resin 10 is filled between the resin baffle 7 and the filter plate 8. The upper and lower ends of the tank body 5 are respectively connected to the water outlet quick connector 2 and the water inlet quick connector 3, which are matched with metal hoses and are respectively located above the resin baffle 7 and below the filter plate 8. The lower part of the tank body 5 is provided with a resin discharge quick connector 4 connected to the denitrification resin 10.

[0033] In this embodiment, the tank body 5 has a diameter of 3.2m and a total height of 4.5m, and is made of stainless steel. The tank body 5 has a built-in resin baffle 7 made of 316L stainless steel, which is welded to the tank body 5 at the periphery. The resin baffle 7 adopts a broken line structure with a bending angle of 90° and is composed of multiple baffles arranged in parallel. The spacing between adjacent baffles is 0.1 to 0.2mm. The height of the resin baffle 7 accounts for about 5% of the height of the tank body 5. Figure 2 and Figure 3 .

[0034] Meanwhile, the filter plate 8 is an arc-shaped structure with a low center and high periphery, and the height of the filter plate 8 accounts for 10-15% of the height of the tank body 5. The filter plate 8 comprises a plurality of filter rings arranged in sequence and concentrically from the center to the periphery, and connecting rods connecting the plurality of filter rings. The plurality of filter rings are uniformly distributed, and the interval between two adjacent filter rings is 0.1-0.2 mm. The filter plate 8 is made of stainless steel, and the center of the filter plate 8 is connected with the resin discharge quick connector 4. Figure 2 and Figure 4 .

[0035] A manhole 6 is further arranged in the tank body 5, and is arranged below the lower edge of the resin baffle 7 and above the height of the denitration resin 10 static layer, so as to facilitate maintenance.

[0036] The tail water of the municipal sewage plant A standard is used as the system water, the tail water is connected with the water inlet quick connector 3 through a pipeline, is uniformly distributed into the resin layer through the filter plate 8, and the nitrate nitrogen in the sewage is removed through the adsorption of the denitration resin 10. The denitration resin 10 is intercepted through the resin baffle 7 as the water flows upward, and the effluent is discharged through the effluent quick connector 2. When the denitration reactor is saturated, the denitration resin 10 can be regenerated in situ, or the effluent quick connector 2 and the water inlet quick connector 3 can be removed, and the single tank is lifted and transported for regeneration.

[0037] The nitrate selective ion exchange resin in the embodiment is a macroporous anion nitrate ion resin, has a spherical particle appearance, a polystyrene copolymer skeleton, a quaternary amine group functional group, a particle size range of 0.3-1.2 mm, and a total exchange capacity of 1000 mol / m 3 Chlorine type, water content is 52±3% chlorine type, loading density is 700-750 g / l.

[0038] The reactor has the advantages of small occupation, low energy consumption, low maintenance cost, stable operation and strong applicability, and is suitable for deep denitration in various sewage plants.

[0039] The above is only a preferred embodiment of the utility model, and of course cannot limit the scope of protection of the utility model. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and changes can be made without departing from the principle of the utility model, and these improvements and changes are also regarded as the protection scope of the utility model.

Claims

1. A dual denitrification reactor, characterized in that: include: Two tank bodies are stacked up and down, each tank body is provided with a lifting ear on the top and a positioning groove that cooperates with the lifting ear on the bottom. The lifting ear of the lower tank body is positioned and accommodated in the positioning groove of the upper tank body. Resin baffles and filter plates are distributed up and down in each tank body, and denitrification resin is filled between the resin baffles and the filter plates. The upper and lower ends of the tank body are connected to the water outlet quick connector and the water inlet quick connector, and are respectively located above the resin baffle and below the filter plate. The lower part of the tank body is provided with a resin discharge quick connector connected to the denitrification resin.

2. The dual denitrification reactor according to claim 1, characterized in that: The tank has a diameter of 2.8-3.6m, a height of 4-5m, and is made of stainless steel.

3. The dual denitrification reactor according to claim 1, wherein: The filter plate is an arc-shaped structure with a low center and high surroundings.

4. The dual denitrification reactor as claimed in claim 1, characterized in that: The filter plate comprises a plurality of filter rings which are distributed sequentially from the center to the periphery and are concentrically arranged, and a connecting rod connecting the plurality of filter rings. The height of the filter plate accounts for 10% to 15% of the height of the tank body.

5. The dual denitrification reactor as claimed in claim 4, characterized in that: Multiple filter rings are evenly distributed, with a distance of 0.1-0.2mm between two adjacent filter rings, and are made of stainless steel.

6. The dual denitrification reactor as claimed in claim 1, characterized in that: The center of the filter plate is connected to the resin discharge quick connector.

7. The dual denitrification reactor as claimed in claim 1, characterized in that: The resin baffle has a broken line structure.

8. The dual denitrification reactor as claimed in claim 7, characterized in that: The bending angle of the resin baffle is 90°.

9. The dual denitrification reactor as claimed in claim 7, characterized in that: The resin baffle is made of a plurality of baffles arranged in parallel, and is made of stainless steel. The distance between two adjacent baffles is 0.1 to 0.2 mm.

10. The dual denitrification reactor according to claim 7, characterized in that: The height of the resin baffle accounts for 3%-8% of the tank height.

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