CN204727707U - Based on the co-oxidation waste disposal plant of multistage fluidized bed - Google Patents

Abstract

The utility model discloses a combined oxidation sewage treatment device based on a multi-stage fluidized bed. According to the sewage flow direction, a fast filter, a first-stage fluidized bed, a second-stage fluidized bed and an adsorption fixed bed are sequentially connected, and the first-stage fluidized bed The bottom of the first fluidized bed and the bottom of the secondary fluidized bed are respectively connected to the ozone generator, the inlet end of the ozone generator is connected to the air compressor, the return water intake pipe of the first-stage fluidized bed and the ozone return air intake pipe of the second-stage fluidized bed They are respectively connected to the return water inlet pipe of the first-stage fluidized bed through jet pumps. The method is that the biodegraded industrial sewage is first filtered through a fast filter, then through a first-stage fluidized bed and a second-stage fluidized bed for combined oxidation treatment of ozone combined with photocatalysis, and finally discharged through adsorption fixed bed adsorption. The combined oxidation sewage treatment device is suitable for the advanced treatment of industrial wastewater after biodegradation, and can jointly utilize ozone and ultraviolet photocatalysis to degrade organic pollutants in the wastewater under fluidized conditions.

Description

Combined Oxidation Sewage Treatment Plant Based on Multistage Fluidized Bed

technical field

The utility model relates to the technical field of sewage treatment, in particular to a combined oxidation sewage treatment device based on a multi-stage fluidized bed.

Background technique

With the development of society and the development of industry, the problems of water resource shortage and environmental pollution have become increasingly serious, and the treatment of sewage and wastewater has become more and more important. In recent years, fluidized bed treatment system has been applied more and more because of its good mass transfer effect, reliable operation and strong microbial activity. However, the current fluidized bed treatment system generally has the following defects: (1) the single-stage purification treatment method is adopted, the purification capacity is low, and the sewage treatment efficiency is low; (2) the single treatment method used in the fluidized bed cannot adapt to industrial sewage in-depth processing.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a combined oxidation sewage treatment device based on a multi-stage fluidized bed, which is applicable to the advanced treatment of industrial sewage after biodegradation, and has high degradation efficiency and good treatment effect.

The technical scheme of the utility model is: a combined oxidation sewage treatment device based on a multi-stage fluidized bed, including a fast filter, a first-stage fluidized bed, a second-stage fluidized bed, an adsorption fixed bed, a jet pump, an ozone generator and Air compressor; according to the flow direction of sewage, fast filter, primary fluidized bed, secondary fluidized bed and adsorption fixed bed are connected in sequence, the bottom of the primary fluidized bed and the bottom of the secondary fluidized bed are respectively connected with the ozone generator Connection, the inlet end of the ozone generator is connected to the air compressor, the return water intake pipe of the first-stage fluidized bed and the ozone return air intake pipe of the second-stage fluidized bed are respectively connected to the return intake pipe of the first-stage fluidized bed through a jet pump .

The fast filter includes a bracket and a filter cartridge, the filter cartridge is fixed on the bracket, a filter cartridge water inlet pipe is provided on the side wall of the upper part of the filter cartridge, a filter cartridge outlet pipe is provided on the side wall of the lower part of the filter cartridge, and a filter cartridge is provided at the bottom of the filter cartridge The mud discharge pipe is provided with a stainless steel filter screen in the filter cylinder. The shape of the stainless steel filter screen is similar to that of the filter cylinder, and it is placed inside the filter cylinder.

The adsorption fixed bed is provided with an active carbon packing layer; the outer wall of the adsorption fixed bed is provided with an adsorption fixed bed water inlet pipe and an adsorption fixed bed outlet pipe, the adsorption fixed bed water inlet pipe is located under the activated carbon packing layer, and the adsorption fixed bed outlet pipe is located at the activated carbon packing layer. layer above.

The first-stage fluidized bed includes an inner cylinder, an outer cylinder, an aeration assembly and an ultraviolet lamp assembly. The inner cylinder is arranged in the outer cylinder, and the bottom of the inner cylinder communicates with the bottom of the outer cylinder, and the top of the inner cylinder communicates with the top of the outer cylinder. The air component is set at the bottom of the inner cylinder, and the ultraviolet lamp component is set at the upper part of the inner cylinder; the upper part of the outer cylinder is an inverted cone structure, forming a separation area. In the separation area, there are water outlet weirs and multiple inclined plates, and each inclined plate is up and down. The structure is arranged in layers, and the outlet weir is set above multiple sloping plates.

An annular reaction pool is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder, a perforated plate is arranged in the reaction pool, catalytic fillers are arranged on the perforated plate, and catalytic filler outlets are arranged on the outer wall of the outer cylinder above the perforated plate.

The aeration assembly includes an aeration head fixing plate and a plurality of aeration heads, the bottom of the inner cylinder is an open structure, and a plurality of aeration heads are evenly distributed on the aeration head fixing plate, and the aeration head fixing plate and the bottom of the outer cylinder Fixed connection; an air inlet pipe is also provided at the bottom of the outer cylinder, and the air inlet pipe is connected with the ozone generator.

The ultraviolet lamp assembly includes an ultraviolet lamp tube and an ultraviolet lamp tube fixing frame. A plurality of ultraviolet lamp tubes are vertically arranged in the inner cylinder, and each ultraviolet lamp tube is fixedly connected to the inner wall of the inner cylinder through a corresponding ultraviolet lamp tube fixing frame.

A monitoring port is provided on the outer wall of the outer cylinder;

The outer wall of the lower part of the outer cylinder is provided with a fluidized bed water inlet pipe;

In the separation zone, fluidized bed outlet pipes are provided at the bottom of multiple inclined plates, and residual ozone exhaust pipes are provided at the top of the separation zone.

The structure of the secondary fluidized bed is basically the same as that of the primary fluidized bed, the only difference is:

(1) In the first-stage fluidized bed, in the separation zone, the bottoms of the plurality of sloping plates are also provided with return water intake pipes, which are connected to the jet pump; the bottom of the outer cylinder is also provided with return flow intake pipes.

(2) In the secondary fluidized bed, in the separation zone, the top of the separation zone is also provided with an ozone return air intake pipe, and the ozone return air intake pipe is connected with a jet pump.

Can realize a kind of combined oxidation sewage treatment method based on multistage fluidized bed by above-mentioned device, comprise the following steps:

(1) The biodegraded industrial sewage enters the fast filter and is sent to the first-stage fluidized bed after being filtered by the fast filter;

(2) Sewage is subjected to the combined oxidation treatment of ozone combined with photocatalysis for the first time in the first-stage fluidized bed, and then sent to the secondary fluidized bed for the second combined oxidation treatment of ozone combined with photocatalysis;

The treatment principle of the first-stage fluidized bed and the second-stage fluidized bed is the same. The ozone gas is sent into the inner cylinder through multiple aeration heads, driving the sewage in the inner cylinder to rise. The ultraviolet rays combine with the sewage to carry out oxidation reaction. After the sewage rises to the top of the inner cylinder, it flows along the outer wall of the inner cylinder to the outer cylinder, and then descends in the separation area between the inner cylinder and the outer cylinder and the reaction pool to form a circulation;

(3) After being treated by the secondary fluidized bed, the obtained water flows into the adsorption fixed bed, and after being adsorbed by the activated carbon packing layer in the adsorption fixed bed, it is discharged from the outlet pipe of the adsorption fixed bed.

When the combined oxidation sewage treatment device and method based on multi-stage fluidized beds are used, the specific principle is: the biodegraded industrial sewage first enters the fast filter, and after being filtered by the stainless steel filter in the filter cartridge, the sewage comes out of the filter cartridge The water pipe flows out and enters the first-stage fluidized bed, and the suspended particles with larger particle diameters generated by filtration are discharged from the mud discharge pipe at the bottom of the filter cartridge; the sewage enters the first-stage fluidized bed and the second-stage fluidized bed in turn for ozone combined with photocatalysis. Combined oxidation treatment, the ozone required by the primary fluidized bed and the secondary fluidized bed is sent from the air compressor to the ozone generator to generate ozone, and then flows into the primary fluidized bed and the secondary fluidized bed respectively In the fluidized bed at all levels, the ozone gas is sent into the inner cylinder through multiple aeration heads, driving the sewage in the inner cylinder to rise, and the sewage is irradiated by the ultraviolet lamp during the upward process, and the ozone gas and ultraviolet light are combined with the sewage. Oxidation reaction, after the sewage rises to the top of the inner cylinder, it flows along the outer wall of the inner cylinder to the outer cylinder (in order to better control the flow direction, a vertically downward strip groove can be set on the outer wall of the inner cylinder), and the inner cylinder and the outer cylinder The separation area between the cylinders and the decline in the reaction tank form a cycle. In the reaction tank, half of the sewage can touch the catalytic packing on the perforated plate during the descent process; The next unit: After being treated by the two-stage fluidized bed, the obtained water flows into the adsorption fixed bed, and after being adsorbed by the activated carbon packing layer in the adsorption fixed bed, it is finally discharged from the outlet pipe of the adsorption fixed bed.

In the above process, the first-stage fluidized bed and the second-stage fluidized bed have the same treatment principle for sewage, but the first-stage fluidized bed has added a return water intake pipe and a return water inlet pipe, and the second-stage fluidized bed has added an ozone return intake pipe. The trachea, through the jet pump, extracts the remaining ozone in the return air intake pipe and the water in the return intake pipe, mixes and flows into the return water intake pipe, thereby improving the utilization rate of ozone, and the excess ozone will be discharged through the remaining ozone discharge pipe and then collected and processed in a centralized manner .

Compared with the prior art, the utility model has the following beneficial effects:

This combined oxidation sewage treatment device based on multi-stage fluidized bed is suitable for the advanced treatment of industrial wastewater after biodegradation, and can jointly use ozone and ultraviolet photocatalysis to degrade organic pollutants in wastewater under fluidized conditions. Degradation wastewater has good treatment effect, fast degradation speed, small footprint, no secondary pollution, less scum and sludge generation, and has the functions of sterilization, decolorization and anti-scaling, etc., high utilization rate of ozone, combined with ozone Advantages over UV photodegradation of organic pollutants.

Description of drawings

Figure 1 is a schematic structural diagram of the combined oxidation sewage treatment device.

Figure 2 is a schematic diagram of the structure of the first-stage fluidized bed.

Figure 3 is a schematic diagram of the structure of a two-stage fluidized bed.

Fig. 4 is a schematic structural diagram of an ultraviolet lamp assembly.

Fig. 5 is a schematic structural diagram of the aeration assembly.

Fig. 6 is a flow chart of sewage treatment when the combined oxidation sewage treatment device is in use.

Detailed ways

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Example

In this embodiment, a combined oxidation sewage treatment device based on a multi-stage fluidized bed, as shown in Figure 1, includes a fast filter 1, a first-stage fluidized bed 2, a second-stage fluidized bed 3, an adsorption fixed bed 4, and a jet pump 5. Ozone generator 6 and air compressor 7; according to the sewage flow direction, fast filter, primary fluidized bed, secondary fluidized bed and adsorption fixed bed are connected in sequence, the bottom of primary fluidized bed and secondary fluidized bed The bottom of the bed is connected with the ozone generator respectively, and the inlet end of the ozone generator is connected with the air compressor, and the return water intake pipe 8 of the first-stage fluidized bed and the ozone return air intake pipe 9 of the second-stage fluidized bed pass the jet pump and the air intake pipe respectively. The reflux inlet pipe 10 of the primary fluidized bed is connected.

The quick filter includes a bracket and a filter cartridge, the filter cartridge is fixed on the bracket, the filter cartridge upper side wall is provided with a filter cartridge water inlet pipe 11, the filter cartridge lower side wall is provided with a filter cartridge outlet pipe 12, and the filter cartridge bottom is provided with The mud discharge pipe 35 is provided with a stainless steel filter screen in the filter cylinder, and the shape of the stainless steel filter screen is similar to the filter cylinder, and is placed in the filter cylinder inside, and a certain distance is kept between the filter screen and the cylinder wall to pass through for waste water.

The adsorption fixed bed is provided with an activated carbon packing layer 13; the outer wall of the adsorption fixed bed is provided with an adsorption fixed bed water inlet pipe 14 and an adsorption fixed bed outlet pipe 15. above the filling layer.

As shown in Figure 2, the primary fluidized bed includes an inner cylinder 16, an outer cylinder 17, an aeration assembly and an ultraviolet lamp assembly, the inner cylinder is arranged in the outer cylinder, and the bottom of the inner cylinder communicates with the bottom of the outer cylinder, and the top of the inner cylinder The top of the outer cylinder is connected, the aeration assembly is arranged at the bottom of the inner cylinder, and the ultraviolet lamp assembly is arranged at the upper part of the inner cylinder; the upper part of the outer cylinder is an inverted conical structure, forming a separation area 18, and the separation area is provided with a water outlet weir 19 and a plurality of The sloping plates 20 are arranged in layers in an up-and-down structure, and the outlet weir is arranged above the sloping plates, and the inner side of each sloping plate is the inner wall 21 of the separation zone.

An annular reaction tank 22 is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. A perforated plate 23 is arranged in the reaction tank. A catalytic filler 24 is arranged on the perforated plate. A catalytic filler inlet 25 is arranged on the outer wall of the outer cylinder above the perforated plate. .

As shown in Figure 5, the aeration assembly includes an aeration head fixing plate 26 and a plurality of aeration heads 27, as shown in Figure 2, the bottom of the inner cylinder is an open structure, and a plurality of aeration heads are evenly distributed on the On the board, the fixed plate of the aeration head is fixedly connected with the bottom of the outer cylinder; the bottom of the outer cylinder is also provided with an air inlet pipe 28, which is connected with the ozone generator.

As shown in Figure 4, the ultraviolet lamp assembly includes an ultraviolet lamp tube 29 and an ultraviolet lamp tube fixing frame 30. A plurality of ultraviolet lamp tubes are vertically arranged in the inner cylinder, and each ultraviolet lamp tube passes through a corresponding ultraviolet lamp tube fixing frame and the inner cylinder. The inner wall is fixedly connected.

As shown in Figure 2, a monitoring port 31 is provided on the outer wall of the outer cylinder;

A fluidized bed water inlet pipe 32 is provided on the outer wall of the lower part of the outer cylinder;

In the separation zone, a fluidized bed outlet pipe 33 is provided at the bottom of the plurality of inclined plates, and a residual ozone exhaust pipe 34 is provided at the top of the separation zone.

As shown in Figure 3, the structure of the secondary fluidized bed is basically the same as that of the primary fluidized bed, the only differences are:

(1) As shown in Figure 1 or Figure 2, in the first-stage fluidized bed, the bottom of a plurality of inclined plates in the separation zone is also provided with a backflow water intake pipe 8, and the backflow water intake pipe is connected with the jet pump; the bottom of the outer cylinder is also provided with Return water inlet pipe 10 is arranged.

(2) As shown in Fig. 1 or Fig. 3, in the secondary fluidized bed, the top of the separation zone is also provided with an ozone return air intake pipe 9, and the ozone return air intake pipe is connected with a jet pump.

A combined oxidation sewage treatment method based on a multi-stage fluidized bed can be realized through the above-mentioned device, as shown in Figure 6, including the following steps:

(1) The biodegraded industrial sewage enters the fast filter and is sent to the first-stage fluidized bed after being filtered by the fast filter;

(2) Sewage is subjected to the combined oxidation treatment of ozone combined with photocatalysis for the first time in the first-stage fluidized bed, and then sent to the secondary fluidized bed for the second combined oxidation treatment of ozone combined with photocatalysis;

The treatment principle of the first-stage fluidized bed and the second-stage fluidized bed is the same. The ozone gas is sent into the inner cylinder through multiple aeration heads, driving the sewage in the inner cylinder to rise. The ultraviolet rays combine with the sewage to carry out oxidation reaction. After the sewage rises to the top of the inner cylinder, it flows along the outer wall of the inner cylinder to the outer cylinder, and then descends in the separation area between the inner cylinder and the outer cylinder and the reaction pool to form a circulation;

(3) After being treated by the secondary fluidized bed, the obtained water flows into the adsorption fixed bed, and after being adsorbed by the activated carbon packing layer in the adsorption fixed bed, it is discharged from the outlet pipe of the adsorption fixed bed.

When the combined oxidation sewage treatment device based on multi-stage fluidized bed is used, the specific principle is: as shown in Figure 1 or Figure 6, the biodegraded industrial sewage first enters the fast filter and is filtered through the stainless steel filter in the filter cartridge Finally, the sewage flows out from the outlet pipe of the filter cartridge and enters the first-stage fluidized bed, and the suspended particles with larger particle diameters generated by filtration are discharged from the mud discharge pipe at the bottom of the filter cartridge; the sewage enters the first-stage fluidized bed and the second-stage fluidized bed in turn. The bed is subjected to the combined oxidation treatment of ozone combined with photocatalysis. The ozone required by the first-stage fluidized bed and the second-stage fluidized bed is sent to the ozone generator by the air compressor to generate ozone, and then flows into the first-stage fluidized bed respectively. bed and the inlet pipe of the secondary fluidized bed. In the fluidized beds at all levels, ozone gas is sent into the inner cylinder through multiple aeration heads, which drives the sewage in the inner cylinder to rise. The gas and ultraviolet light combine with the sewage for oxidation reaction. After the sewage rises to the top of the inner cylinder, it flows along the outer wall of the inner cylinder to the outer cylinder (in order to better control the flow direction, a vertically downward long strip groove can be set on the outer wall of the inner cylinder ), the separation zone between the inner cylinder and the outer cylinder and the reaction tank fall to form a cycle (the process is shown by the arrow in Figure 2 or Figure 3), and in the reaction tank, half of the area of the sewage can be touched during the descent process Catalytic packing on the perforated plate; in the separation zone, after the sludge and water are separated, the sewage flows to the next unit through the outlet weir; after the secondary fluidized bed treatment, the obtained water flows into the adsorption fixed bed and passes through the adsorption After the activated carbon packing layer is adsorbed, it is finally discharged from the outlet pipe of the adsorption fixed bed.

In the above process, the first-stage fluidized bed and the second-stage fluidized bed have the same treatment principle for sewage, but the first-stage fluidized bed has added a return water intake pipe and a return water inlet pipe, and the second-stage fluidized bed has added an ozone return intake pipe. The trachea, through the jet pump, extracts the remaining ozone in the return air intake pipe and the water in the return intake pipe, mixes and flows into the return water intake pipe, thereby improving the utilization rate of ozone, and the excess ozone will be discharged through the remaining ozone discharge pipe and then collected and processed in a centralized manner .

As mentioned above, the utility model can be better realized, and the above-described embodiment is only a preferred embodiment of the utility model, and is not used to limit the scope of implementation of the utility model; that is, all equal changes made according to the contents of the utility model and modifications are all covered by the scope of protection required by the claims of the present utility model.

Claims (9)

1. The united oxidation sewage treatment plant based on multistage fluidized bed is characterized in that, comprises fast filter, primary fluidized bed, secondary fluidized bed, adsorption fixed bed, jet pump, ozone generator and air compressor; According to the flow direction of the sewage, the fast filter, the primary fluidized bed, the secondary fluidized bed and the fixed adsorption bed are connected in sequence. The bottom of the primary fluidized bed and the bottom of the secondary fluidized bed are respectively connected to the ozone generator, and the ozone is The inlet end of the device is connected to the air compressor, and the return water intake pipe of the first-stage fluidized bed and the ozone return air intake pipe of the second-stage fluidized bed are respectively connected to the return intake pipe of the first-stage fluidized bed through a jet pump. 2. according to the described combined oxidation sewage treatment device based on multi-stage fluidized bed of claim 1, it is characterized in that, described fast filter comprises support and filter cartridge, and filter cartridge is fixed on the support, and the sidewall of filter cartridge top is provided with There is a water inlet pipe for the filter cartridge, a filter cartridge outlet pipe is provided on the side wall of the lower part of the filter cartridge, a mud discharge pipe is provided at the bottom of the filter cartridge, and a stainless steel filter is arranged inside the filter cartridge; The adsorption fixed bed is provided with an active carbon packing layer; the outer wall of the adsorption fixed bed is provided with an adsorption fixed bed water inlet pipe and an adsorption fixed bed outlet pipe, the adsorption fixed bed water inlet pipe is located under the activated carbon packing layer, and the adsorption fixed bed outlet pipe is located at the activated carbon packing layer. layer above. 3. The combined oxidation sewage treatment device based on multi-stage fluidized bed according to claim 1, characterized in that, the first-stage fluidized bed comprises an inner cylinder, an outer cylinder, an aeration assembly and an ultraviolet lamp assembly, and the inner cylinder is provided with In the outer cylinder, the bottom of the inner cylinder communicates with the bottom of the outer cylinder, the top of the inner cylinder communicates with the top of the outer cylinder, the aeration component is located at the bottom of the inner cylinder, and the ultraviolet lamp component is located at the upper part of the inner cylinder; the upper part of the outer cylinder is an inverted cone Shaped structure, forming a separation area, the separation area is provided with a water outlet weir and a plurality of inclined plates, each inclined plate is arranged in a layered structure, and the water outlet weir is set above the plurality of inclined plates. 4. The united oxidation sewage treatment device based on multi-stage fluidized bed according to claim 3, characterized in that, an annular reaction pool is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and a perforated plate is arranged in the reaction pool , the perforated plate is provided with catalytic packing, and the outer wall of the outer cylinder above the perforated plate is provided with a catalytic packing outlet. 5. The combined oxidation sewage treatment device based on multi-stage fluidized bed according to claim 3, characterized in that, the aeration assembly includes an aeration head fixing plate and a plurality of aeration heads, and the bottom of the inner cylinder is an open structure , a plurality of aeration heads are evenly distributed on the aeration head fixing plate, and the aeration head fixing plate is fixedly connected with the bottom of the outer cylinder; the bottom of the outer cylinder is also provided with an air inlet pipe, which is connected to the ozone generator; The ultraviolet lamp assembly includes an ultraviolet lamp tube and an ultraviolet lamp tube fixing frame. A plurality of ultraviolet lamp tubes are vertically arranged in the inner cylinder, and each ultraviolet lamp tube is fixedly connected to the inner wall of the inner cylinder through a corresponding ultraviolet lamp tube fixing frame. 6. The combined oxidation sewage treatment device based on multi-stage fluidized bed according to claim 3, characterized in that, the outer wall of the outer cylinder is provided with a monitoring port; The outer wall of the lower part of the outer cylinder is provided with a fluidized bed water inlet pipe; In the separation zone, fluidized bed outlet pipes are provided at the bottom of multiple inclined plates, and residual ozone exhaust pipes are provided at the top of the separation zone. 7. The united oxidation sewage treatment device based on multi-stage fluidized bed according to claim 3, characterized in that, in the separation zone, the bottoms of a plurality of sloping plates are also provided with backflow water intake pipes, and the backflow water intake pipes and jet pumps connection; the bottom of the outer cylinder is also provided with a return inlet pipe. 8. The combined oxidation sewage treatment device based on multi-stage fluidized beds according to any one of claims 3-6, characterized in that the structure of the secondary fluidized bed is the same as that of the primary fluidized bed. 9. according to claim 8, based on the combined oxidation sewage treatment device of multi-stage fluidized bed, it is characterized in that, in the separation zone, the top of the separation zone is also provided with an ozone reflux air intake pipe, an ozone reflux air intake pipe and a jet pump connect.