A river sewage purification device

Abstract

The purpose of the present invention is to provide a river sewage purification device, the main body of which is an open sewage purification box formed by a right side plate, a left side plate, and a bottom plate. An air inlet pipe is provided through the bottom plate, and the air inlet pipe is connected to a gas distribution plate. By adding a photocatalyst carrier into the sewage purification box and introducing river sewage, the air inlet pipe is connected to compressed air to fully mix and contact the photocatalyst carrier with the river sewage, and effectively purify the river sewage through sunlight; the sewage treatment efficiency is high, and the device is simple and flexible, and can be applied to towns, villages and other areas.

Description

Technical Field

[0001] The invention belongs to the technical field of water pollution control and relates to a river sewage purification device. Background Art

[0002] Under today's socioeconomic trends, the amount of wastewater generated by industrial and agricultural production and daily life is increasing, and the types of pollutants are also increasing. The establishment of centralized sewage treatment plants in industrial and densely populated areas is the most important technical measure to combat water pollution. However, in urban and rural areas, centralized sewage treatment plants are not widely available, resulting in large amounts of sewage being directly discharged into water bodies, causing river pollution. Organic matter such as pesticides, fertilizers, and livestock waste are the main sources of river pollution.

[0003] Currently, the main approaches to treating this type of river pollution include constructed wetlands, stabilization ponds, and land filtration. Constructed wetlands require a large area and are expensive to construct. Stabilization ponds primarily utilize the natural purification capabilities of bacteria and algae to treat organic pollutants in wastewater, but they also suffer from large land requirements, limited functionality, and long treatment times. Land filtration, which utilizes a series of processes within a soil-plant system, also suffers from low hydraulic capacity, poor treatment capacity, and a large land footprint.

[0004] The present invention discloses a river sewage purification device. By using a purification method matched with the river sewage purification device, the sewage treatment efficiency can be greatly improved. Moreover, the device is simple and flexible and can be applied to towns, villages and other areas. Summary of the Invention

[0005] The purpose of the present invention is to provide a river sewage purification device, the main body of which is an open sewage purification box formed by a right side plate, a left side plate, and a bottom plate. An air inlet pipe is provided through the bottom plate, and the air inlet pipe is connected to a gas distribution plate. By adding a photocatalyst carrier into the sewage purification box and introducing river sewage, the air inlet pipe is connected to compressed air to fully mix and contact the photocatalyst carrier with the river sewage, and effectively purify the river sewage through sunlight; the sewage treatment efficiency is high, and the device is simple and flexible, and can be applied to towns, villages and other areas.

[0006] A river sewage purification device, the main body of the river sewage purification device is an open sewage purification box 1 formed by a right side plate 2, a left side plate 3, and a bottom plate 4. An air intake pipe 7 is provided through the bottom plate 4, and the air intake pipe 7 is connected to a gas distribution plate 8. The gas distribution plate 8 is provided with air holes; a photocatalyst carrier is added into the sewage purification box 1.

[0007] Furthermore, a support column 6 is installed at the bottom of the sewage purification tank 1.

[0008] Furthermore, a drainage pipe 5 is installed on the bottom plate 4 .

[0009] Furthermore, the drainage pipe 5 is provided with a matching filter material 9 .

[0010] The preparation method of the photocatalyst carrier is as follows:

[0011] (1) Dissolve water glass in hot water to prepare a water glass solution with a mass fraction of 3%-5%;

[0012] (2) Weighing hollow glass microspheres and nano-titanium dioxide in a mass ratio of 1:3-4 to obtain a mixed powder;

[0013] (3) adding 20%-30% by weight of the water glass solution obtained in step (1) to the mixed powder obtained in step (2), stirring thoroughly, and sieving to obtain microspheres with a particle size of 2-3 mm;

[0014] (4) Take a titanium chloride ethanol solution with a mass fraction of 0.5-0.8%, add 2-3 times the mass of the titanium chloride ethanol solution of the microspheres prepared in step (3), and remove the ethanol by vacuum distillation to obtain a photocatalyst carrier with a titanium dioxide surface layer.

[0015] Furthermore, the particle size of the hollow glass microspheres is 150-250 μm.

[0016] Furthermore, the particle size of the nano titanium dioxide is 5-10 nm.

[0017] Furthermore, the modulus of the water glass is 2.9-3.5.

[0018] Furthermore, the density of the microspheres obtained in step (3) is preferably 1.00-1.05 g / cm 3 .

[0019] Furthermore, the mass ratio of river sewage in the sewage purification tank to photocatalyst carrier is 100:3-6.

[0020] Advantages of the present invention:

[0021] 1. The present invention adds a photocatalyst carrier to the sewage purification tank, introduces river sewage, and connects the air inlet pipe to compressed air, so that the photocatalyst carrier and river sewage are fully mixed and contacted, and the river sewage is effectively purified through sunlight. The sewage treatment efficiency is high, and the device is simple and flexible, which can be applied to towns, villages and other areas.

[0022] 2. Control the ratio of hollow glass microspheres and nano-titanium dioxide, and adjust the density of microspheres to be close to that of water. This is conducive to the photocatalyst carrier forming a suspended system in the river sewage under the action of compressed air, fully contacting with the river sewage, and improving the sewage treatment efficiency;

[0023] 3. Since nano-titanium dioxide is wrapped by the water glass layer and attached to the surface of the hollow glass microspheres, the effective treatment area of ​​the microsphere surface is small. Therefore, the present invention hydrolyzes titanium chloride into titanium dioxide on the outside of the microspheres, which significantly increases the effective surface treatment area and improves the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the river sewage purification device of the present invention.

[0025] In the figure, 1-sewage purification box; 2-right side panel; 3-left side panel; 4-bottom plate; 5-drain pipe; 6-support column; 7-inlet pipe; 8-gas distribution plate; 9-filter material. DETAILED DESCRIPTION

[0026] Example 1

[0027] A river sewage purification device, the main body of the river sewage purification device is an open sewage purification box 1 formed by a right side plate 2, a left side plate 3, and a bottom plate 4, a support column 6 is installed at the bottom of the sewage purification box 1, a drain pipe 5 is installed on the bottom plate 4, and a matching filter material 9 is arranged on the drain pipe 5; an air intake pipe 7 is provided through the bottom plate 4, and the air intake pipe 7 is connected to a gas distribution plate 8, and the gas distribution plate 8 is distributed with air holes; a photocatalyst carrier is added into the sewage purification box 1.

[0028] The preparation method of the above-mentioned photocatalyst carrier is as follows:

[0029] (1) Dissolve water glass with a modulus of 2.9 in hot water to prepare a water glass solution with a mass fraction of 5%;

[0030] (2) Weighing hollow glass microspheres and nano-titanium dioxide in a ratio of 1:3 to obtain a mixed powder; the particle size of the hollow glass microspheres is 150 μm;

[0031] (3) The mixed powder obtained in step (2) was added to 20% by weight of the water glass solution obtained in step (1), stirred thoroughly, and sieved to obtain microspheres with a particle size of 3 mm and a density of 0.91 g / cm 3 ;

[0032] (4) Take a 0.5% by mass titanium chloride ethanol solution, add the microspheres prepared in step (3) in an amount twice the mass of the titanium chloride ethanol solution, and remove the ethanol by vacuum distillation to obtain a photocatalyst carrier with a titanium dioxide surface layer.

[0033] Example 2

[0034] The river sewage purification device is the same as that in Example 1;

[0035] The preparation method of the photocatalyst carrier is as follows:

[0036] (1) Dissolve water glass with a modulus of 3.3 in hot water to prepare a water glass solution with a mass fraction of 4%;

[0037] (2) Weighing hollow glass microspheres and nano-titanium dioxide in a ratio of 1:3.38 to obtain a mixed powder; the particle size of the hollow glass microspheres is 200 μm;

[0038] (3) The mixed powder obtained in step (2) was added to 22% by weight of the water glass solution obtained in step (1), stirred thoroughly, and sieved to obtain microspheres with a particle size of 3 mm and a density of 1.01 g / cm 3 ;

[0039] (4) Take a 0.6% by mass titanium chloride ethanol solution, add 3 times the mass of the titanium chloride ethanol solution of the microspheres prepared in step (3), and remove the ethanol by vacuum distillation to obtain a photocatalyst carrier with a titanium dioxide surface layer.

[0040] Example 3

[0041] The river sewage purification device is the same as that in Example 1;

[0042] The preparation method of the photocatalyst carrier is as follows:

[0043] (1) Dissolve water glass with a modulus of 3.5 in hot water to prepare a water glass solution with a mass fraction of 3%;

[0044] (2) Weighing hollow glass microspheres and nano-titanium dioxide in a ratio of 1:4 to obtain a mixed powder; the particle size of the hollow glass microspheres is 250 μm;

[0045] (3) The mixed powder obtained in step (2) was added to 30% by weight of the water glass solution obtained in step (1), stirred thoroughly, and sieved to obtain microspheres with a particle size of 3 mm and a density of 1.10 g / cm 3 ;

[0046] (4) Take a titanium chloride ethanol solution with a mass fraction of 0.8%, add the microspheres prepared in step (3) in an amount three times the mass of the titanium chloride ethanol solution, and remove the ethanol by vacuum distillation to obtain a photocatalyst carrier with a titanium dioxide surface layer.

[0047] Comparative Example 1

[0048] The river sewage purification device is the same as that in Example 1. In the preparation method of the photocatalyst carrier, step (4) is not performed, and the rest is the same as that in Example 2.

[0049] Comparative Example 2

[0050] The river sewage purification device is the same as in Example 1. In the preparation method of the photocatalyst carrier, the mass ratio of hollow glass microspheres to nano-titanium dioxide is 1:5, and the density of the prepared microspheres is 1.26g / cm 3 , the rest are the same as in Example 2.

[0051] In the preparation method of the photocatalyst carrier, nano-titanium dioxide with a particle size of 5 nm was used. The mass ratio of the photocatalyst carriers prepared in each embodiment to the comparative example was 100:5. A river sewage purification device with a length of 6 m, a width of 2 m, and a height of 1.5 m was placed in a xenon lamp environment. After treatment for 4 hours under the same process conditions, the changes in the concentration of dimehypo and the total nitrogen concentration of each embodiment and the comparative example were compared (the original concentration of dimehypo in the river sewage was 3.3 ppm, and the total nitrogen concentration was 10.7 ppm):

[0052]

[0053] The above-mentioned river sewage purification device can be used for river sewage treatment. Its working method is to extract river sewage from the river into the sewage purification tank, purify it through sunlight, and then discharge it into the river after purification is completed.

[0054] The above-mentioned river sewage purification device can be deformed, and the right side plate and the left side plate can be set as a filter mesh structure, and then the river sewage purification device can be placed as a whole into the river, so that the river sewage flows in and out from both sides, realizing real-time purification treatment in the river.

[0055] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A river sewage purification device, characterized in that: The main body of the river sewage purification device is an open sewage purification box formed by a right side plate, a left side plate, and a bottom plate. An air inlet pipe is provided through the bottom plate, and the air inlet pipe is connected to a gas distribution plate, which is provided with air holes. A photocatalyst carrier is added into the sewage purification box. The preparation method of the photocatalyst carrier is as follows: (1) Dissolve water glass in hot water to prepare a water glass solution with a mass fraction of 3%-5%; (2) Weighing hollow glass microspheres and nano-titanium dioxide in a mass ratio of 1:3-4 to obtain a mixed powder; (3) adding 20%-30% by weight of the water glass solution obtained in step (1) to the mixed powder obtained in step (2), stirring thoroughly, and sieving to obtain microspheres with a particle size of 2-3 mm; (4) taking a titanium chloride ethanol solution with a mass fraction of 0.5-0.8%, adding 2-3 times the mass of the titanium chloride ethanol solution to the microspheres prepared in step (3), and removing the ethanol by vacuum distillation to obtain a photocatalyst carrier with a titanium dioxide surface layer; The density of the microspheres obtained in step (3) is 1.00-1.05 g / cm 3 .

2. The river sewage purification device according to claim 1, characterized in that: A support column is installed at the bottom of the sewage purification box.

3. The river sewage purification device according to claim 1, characterized in that: A drainage pipe is installed on the bottom plate.

4. The river sewage purification device according to claim 3, characterized in that: The drain pipe is provided with matching filter material.

5. The river sewage purification device according to claim 1, characterized in that: The particle size of the hollow glass microspheres is 150-250 μm.

6. The river sewage purification device according to claim 1, characterized in that: The particle size of the nano titanium dioxide is 5-10 nm.

7. The river sewage purification device according to claim 1, characterized in that: The modulus of the water glass is 2.9-3.

5.

8. The river sewage purification device according to claim 1, characterized in that: The mass ratio of river sewage in the sewage purification tank to photocatalyst carrier is 100:3-6.

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