A method for treating rural non-point source pollution

Abstract

The invention discloses an integrated reactor for treating rural non-point source pollution and a method for treating rural non-point source pollution by using the reactor. The reactor increases the temperature, reduces the pH and provides N and S elements for treating rural non-point source polluted water by adding straw in a combustion chamber for combustion, greatly promotes photocatalytic decomposition and biodegradation, and greatly accelerates the pollutant treatment speed; and the combustion exhaust gas has no adverse effect on the environment after being purified and absorbed twice; the invention is simple and flexible, can treat rural non-point source pollution caused by different reasons, and can treat decentralized rural non-point source pollution in an integrated manner.

Description

Technical Field

[0001] The invention relates to rural pollution treatment technology, in particular to a method for treating rural non-point source pollution. Background Art

[0002] Rural non-point source pollution refers to the pollution caused by dissolved or solid pollutants in rural life and agricultural production activities, which enter the receiving water bodies (rivers, lakes, reservoirs, bays) from non-specific areas through farmland surface runoff, farmland drainage and underground seepage under the action of precipitation and runoff.

[0003] The main causes of rural non-point source pollution are: 1. Excessive use of chemical fertilizers leads to eutrophication of water bodies and soil acidification; 2. Excessive use of pesticides and casual discarding of pesticide bottles and bags lead to water pollution; 3. Large amounts of excrement from livestock and poultry farming cause water pollution, air odor and other problems; 4. The burning of excess straw causes soil compaction and deterioration of air quality.

[0004] In the existing technology, there are different treatment technologies for different rural non-point source pollution: for example, eutrophic water bodies can be introduced into aeration tanks to purify water bodies using microorganisms; for example, bacteria can be added to reduce the generation of odorous gases in wastewater and waste from livestock and poultry farming, etc. But generally speaking, the treatment technology for rural non-point source pollution faces two major problems. The first is that the causes of rural non-point source pollution are complex and diverse. A certain technology can treat a certain rural non-point source pollution, but it is powerless for another rural non-point source pollution; the second is that a large amount of rural non-point source pollution is decentralized and difficult to treat centrally, so the treatment equipment and treatment technology must be simple and flexible.

[0005] To this end, the present invention has developed a comprehensive reactor for treating rural non-point source pollution and a treatment method for treating rural non-point source pollution using the reactor, which has a comprehensive treatment effect on rural non-point source pollution caused by fertilizers, pesticides, livestock and poultry breeding and straw, with good treatment effect and high treatment efficiency. Summary of the invention

[0006] The present invention develops an integrated reactor for treating rural non-point source pollution and a treatment method for treating rural non-point source pollution using the reactor, which has a comprehensive treatment effect on rural non-point source pollution caused by fertilizers, pesticides, livestock and poultry breeding and straw, with good treatment effect and high treatment efficiency.

[0007] A comprehensive reactor for treating rural non-point source pollution, the bottom of the reactor is a bottom plate 1, the left side is a left vertical plate 2, the top is a top plate 3, and the right side is a right vertical plate 4, the bottom plate 1 and the right vertical plate 4 are connected through an inclined bottom plate 5; a gas outlet 31 is provided on the top plate 3, and a pollutant inlet 41 is provided on the right vertical plate 4; an inclined partition plate 8 is provided between the left vertical plate 2 and the right vertical plate 4, and a gas through hole 81 is provided at one end of the inclined partition plate 8 at a high position, and an air guide inclined plate 9 is provided on the upper part of the inclined partition plate 8, a combustion chamber vertical plate 6 is provided on the bottom plate 1, and a flue vertical plate 7 is provided on the inclined partition plate 8; a combustion chamber 15 is formed between the bottom plate 1, the left vertical plate 2, and the combustion chamber vertical plate 6, and a flue gas channel 16 is formed between the combustion chamber vertical plate 6 and the flue vertical plate 7; the bottom plate 1, the right vertical plate 4, the inclined bottom plate A pollutant treatment chamber 17 is formed between the plate 5, the flue vertical plate 7, and the inclined partition plate 8; a gas absorption chamber 19 is formed between the left vertical plate 2, the top plate 3, the right vertical plate 4, and the inclined partition plate 8, and an air guide channel 18 is formed between the inclined partition plate 8 and the air guide inclined plate 9; an air inlet 21 and a compressed gas inlet 22 are opened on the left vertical plate 2, and the compressed gas inlet 22 is connected to the compressed gas pipeline 10, and the compressed gas pipeline 10 passes through the combustion chamber vertical plate 6 and the flue vertical plate 7 and is connected to the air motor 11, and the air motor 11 is connected to an impeller 12; the impeller 12 is connected to the air motor 11 through an impeller support shaft 121, and the outer end of the impeller support shaft 121 supports and connects to a wheel piece 122; an ultraviolet lamp 14 is arranged below the inclined partition plate 8, and the ultraviolet lamp 14 is located above the wheel piece 122; the outer surface of the wheel piece 122 is coated with titanium oxide.

[0008] Furthermore, support legs 13 are provided below the inclined bottom plate 5 , and the provision of the support legs 13 makes the reactor more stable.

[0009] Furthermore, a reactor outlet 171 is provided at the bottom of the pollutant treatment chamber 17 .

[0010] Furthermore, a gas absorption chamber outlet 191 is provided at the bottom of the gas absorption chamber 19 .

[0011] Furthermore, the compressed gas pipeline 10 is made of metal.

[0012] Furthermore, the reactor can be placed on a cart or trailer according to different specifications, so that it has sufficient flexibility and the ability to handle dispersed pollution.

[0013] The method for treating rural non-point source pollution using the above reactor is as follows:

[0014] (1) Adding rural non-point source polluted water to be treated into the pollutant treatment chamber 17;

[0015] (2) dissolving the straw ash in water and adding it into the gas absorption chamber 19;

[0016] (3) The ultraviolet lamp 14 and the pneumatic motor 11 start working, and then straw is added into the combustion chamber 15 and ignited.

[0017] During operation, the rural non-point source polluted water body to be treated is added from the pollutant inlet 41 and then the pollutant inlet 41 is closed. Then, the straw ash is dissolved in water and added to the gas absorption chamber 19, the ultraviolet lamp 14 is turned on, and the compressed air is connected to the compressed gas inlet 22. The pneumatic motor 11 and the impeller 12 start to rotate and work, and the air inlet 21 continuously passes air. Then, straw is added to the combustion chamber 15 and ignited, and then the combustion chamber 15 is sealed; the remaining air and combustion exhaust gas in the combustion chamber 15 enter the pollutant treatment chamber 17 through the flue gas channel 16, and are stirred and dispersed by the impeller 12. The residual air and combustion exhaust gas are then mixed with the ozone generated by the ultraviolet lamp 14, and enter the gas absorption chamber 19 through the gas through hole 81 and the air guide channel 18. The gas that cannot be absorbed is discharged from the reactor through the gas outlet 31.

[0018] Furthermore, when the reactor treats rural non-point source polluted water caused by fertilizers and pesticides, the mass ratio of the straw used in the combustion chamber 15 to the treated water in the pollutant treatment chamber 17 is 3 to 5:100.

[0019] Furthermore, when the reactor treats wastewater discharged from livestock and poultry farming, the mass ratio of the straw used in the combustion chamber 15 to the treated water in the pollutant treatment chamber 17 is 10-15:100.

[0020] Advantages of the present invention:

[0021] 1. The present invention uses an air inlet to introduce air, and the straw is burned in a closed combustion chamber. The air and combustion exhaust gas are introduced into the pollutant treatment chamber, and the rural non-point source polluted water to be treated is filtered to remove dust, SO2, NO2, etc., and at the same time, the rural non-point source polluted water to be treated is aerated and provided with N, S and other elements, thereby increasing the growth rate of microorganisms in the rural non-point source polluted water to be treated;

[0022] 2. The straw burns in the closed combustion chamber and heats the compressed gas in the compressed gas pipeline, which increases the working pressure and the power of the pneumatic motor and partially utilizes the combustion heat;

[0023] 3. The setting of the inclined bottom plate eliminates dead zones in the pollutant treatment chamber, makes the water body more evenly stirred, and makes the water body contact with the air and combustion exhaust gas more evenly, which is conducive to improving the treatment effect and efficiency of rural non-point source pollution water bodies;

[0024] 4. When the present invention treats rural non-point source polluted water, the outer surface of the impeller is photocatalytically decomposed by the titanium oxide layer, and the inner surface of the impeller is biodegraded by the formation of a microbial film due to the growth of microorganisms;

[0025] 5. The combustion of waste gas increases the temperature of rural non-point source polluted water bodies and reduces their pH. It has been found in practice that the increase in temperature and the decrease in pH of rural non-point source polluted water bodies have a great promoting effect on photocatalytic decomposition and biodegradation, and the speed of pollutant treatment is greatly accelerated;

[0026] 6. The inclined setting of the inclined partition plate allows the ozone generated by the ultraviolet lamp to be brought into the gas absorption chamber by the purified air and combustion exhaust gas, effectively avoiding the adverse effects of ozone on the growth of microorganisms;

[0027] 7. Dissolve the ash from burning straw in water and add it into the gas absorption chamber, which can further absorb part of the CO2 in the combustion exhaust gas. The straw is consumed, and the combustion exhaust gas has no adverse effect on the environment after being purified and absorbed twice.

[0028] 8. The present invention can handle decentralized rural non-point source pollution in an integrated manner, can comprehensively handle pollution and consume a certain amount of straw, and is simple and flexible, and has no special restrictions. It can handle rural non-point source pollution caused by various reasons, including water bodies and soil. The polluted soil can be dispersed with water and purified using the reactor of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a cross-sectional view of the reactor of the present invention;

[0030] Figure 2 is a front view of the impeller of the present invention;

[0031] Figure 3 It is the working principle diagram of the reactor of the present invention;

[0032] In the figure, 1-bottom plate, 2-left vertical plate, 21-air inlet, 22-compressed gas inlet, 3-top plate, 31-gas outlet, 4-right vertical plate, 41-pollutant inlet, 5-inclined bottom plate, 6-combustion chamber vertical plate, 7-flue vertical plate, 8-inclined partition plate, 81-gas through hole, 9-gas guide inclined plate, 10-compressed gas pipeline, 11-pneumatic motor, 12-impeller, 121-impeller support shaft, 122-wheel blade, 13-support foot, 14-ultraviolet lamp, 15-combustion chamber, 16-flue gas channel, 17-pollutant treatment chamber, 171-reactor outlet, 18-gas guide channel, 19-gas absorption chamber, 191-gas absorption chamber outlet DETAILED DESCRIPTION

[0033] Example 1

[0034] The present invention will now be described in conjunction with the accompanying drawings.

[0035] like Figure 1 As shown, a comprehensive reactor for treating rural non-point source pollution, the bottom of the reactor is a bottom plate 1, the left side is a left vertical plate 2, the top is a top plate 3, the right side is a right vertical plate 4, the bottom plate 1 and the right vertical plate 4 are connected through an inclined bottom plate 5; a gas outlet 31 is provided on the top plate 3, and a pollutant inlet 41 is provided on the right vertical plate 4; an inclined partition plate 8 is provided between the left vertical plate 2 and the right vertical plate 4, and a gas through hole 81 is provided at one end of the inclined partition plate 8 at a high position, and a gas guide inclined plate 9 is provided on the upper part of the inclined partition plate 8, a combustion chamber vertical plate 6 is provided on the bottom plate 1, and a flue vertical plate 7 is provided on the inclined partition plate 8; a combustion chamber 15 is formed between the bottom plate 1, the left vertical plate 2 and the combustion chamber vertical plate 6, and a flue gas channel 16 is formed between the combustion chamber vertical plate 6 and the flue vertical plate 7; the bottom plate 1, the right vertical plate 4, the inclined A pollutant treatment chamber 17 is formed between the bottom plate 5, the flue vertical plate 7, and the inclined partition plate 8; a gas absorption chamber 19 is formed between the left vertical plate 2, the top plate 3, the right vertical plate 4, and the inclined partition plate 8, and an air guide channel 18 is formed between the inclined partition plate 8 and the air guide inclined plate 9; an air inlet 21 and a compressed gas inlet 22 are provided on the left vertical plate 2, the compressed gas inlet 22 is connected to the compressed gas pipeline 10, the compressed gas pipeline 10 passes through the combustion chamber vertical plate 6 and the flue vertical plate 7 and is connected to the air motor 11, and the air motor 11 is connected to the impeller 12; the impeller 12 is connected to the air motor 11 through the impeller support shaft 121, and the outer end of the impeller support shaft 121 supports the connecting wheel piece 122; an ultraviolet lamp 14 is arranged below the inclined partition plate 8, and the ultraviolet lamp 14 is located above the wheel piece 122; the outer surface of the wheel piece 122 is coated with titanium oxide.

[0036] To make the reactor more stable, a support foot 13 is provided under the inclined bottom plate 5; a reactor outlet 171 is provided at the bottom of the pollutant treatment chamber 17; a gas absorption chamber outlet 191 is provided at the bottom of the gas absorption chamber 19; and the compressed gas pipeline 10 is made of metal.

[0037] The method for treating rural non-point source pollution using the above reactor is as follows:

[0038] (1) Adding rural non-point source polluted water to be treated into the pollutant treatment chamber 17;

[0039] (2) dissolving the straw ash in water and adding it to the gas absorption chamber 19;

[0040] (3) The ultraviolet lamp 14 and the pneumatic motor 11 start to work, and then straw is added into the combustion chamber 15 and ignited.

[0041] The above reactor can be placed on a cart or trailer according to different specifications, so that it has sufficient flexibility and the ability to treat dispersed pollution. When working, add the rural non-point source polluted water to be treated from the pollutant inlet 41, close the pollutant inlet 41, and then add the straw ash dissolved in water to the gas absorption chamber 19, turn on the ultraviolet lamp 14, connect the compressed air to the compressed gas inlet 22, the air motor 11 and the impeller 12 start to rotate, and the air inlet 21 continuously introduces air, then add straw to the combustion chamber 15 and ignite it, and then close the combustion chamber 15; Figure 3 As shown, the remaining air and combustion exhaust gas in the combustion chamber 15 enter the pollutant treatment chamber 17 through the flue gas channel 16 and are stirred and dispersed by the impeller 12. The residual air and combustion exhaust gas are then mixed with the ozone generated by the ultraviolet lamp 14 and enter the gas absorption chamber 19 through the gas through hole 81 and the gas guide channel 18. The gas that cannot be absorbed is discharged from the reactor through the gas outlet 31.

[0042] The above reactor can treat various rural non-point source pollution, not limited to water bodies, but also including soil, sludge, etc. When treating solid pollution such as soil and sludge, water can be added to prepare it into slurry and the above treatment method can be used for treatment.

[0043] In practice, we found that:

[0044] 1. Using straw burning to raise the temperature of rural non-point source pollution water to be treated by 5℃ to 10℃, the treatment time is reduced by more than 40% compared with not using straw burning to raise the water temperature;

[0045] 2. The combination of photocatalytic decomposition and biodegradation improves the treatment effect and efficiency, and can adapt to rural non-point source pollution caused by different reasons. In addition, the combustion exhaust gas provides N, S and other elements for the growth of microorganisms. After the acidic gas is absorbed, the pH of the water body is reduced, and the speed of photocatalytic decomposition and biodegradation is accelerated.

[0046] 3. Compared with the flat-bottomed pollutant treatment chamber, the inclined bottom plate has increased the water treatment efficiency by nearly 20%;

[0047] 4. After the combustion exhaust gas is purified and absorbed twice, the dust and oxide gas are fully treated and have no adverse impact on the environment.

[0048] At the same time, through the study of rural non-point source pollution water bodies caused by different reasons, it was found that the organic matter content of rural non-point source pollution water bodies caused by fertilizers and pesticides is relatively low, and photocatalytic decomposition is the main degradation method, and microorganisms play a role in consuming N, S, P and other elements in the water body; the amount of straw consumed is 3% to 5% of the mass of rural non-point source pollution water bodies. At this time, the treatment efficiency of rural non-point source pollution water bodies is high, and the combustion exhaust gas can be fully treated;

[0049] The rural non-point source polluted water bodies formed by livestock and poultry breeding have a high content of organic matter. Photocatalytic decomposition and biodegradation are the main degradation methods. The amount of straw consumed is 10% to 15% of the mass of the rural non-point source polluted water bodies. At this time, the treatment efficiency of rural non-point source polluted water bodies is high, and the combustion exhaust gas can be fully treated.

[0050] Finally: The "up", "down", "left" and "right" mentioned in the present invention are only used to facilitate the description of the corresponding relationship between the components. At the same time, the above description is only a preferred embodiment of the present invention and is not used 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 protection scope of the present invention.

Claims

1. A comprehensive reactor for treating rural non-point source pollution, characterized in that: The bottom of the reactor is a bottom plate (1), the left side is a left vertical plate (2), the top is a top plate (3), and the right side is a right vertical plate (4); the bottom plate (1) and the right vertical plate (4) are connected via an inclined bottom plate (5); a gas outlet (31) is provided on the top plate (3), and a pollutant inlet (41) is provided on the right vertical plate (4); an inclined partition plate (8) is provided between the left vertical plate (2) and the right vertical plate (4), and a gas through hole (81) is provided at one end of the inclined partition plate (8); (8) is provided with an air guide inclined plate (9) at the top, a combustion chamber vertical plate (6) is provided on the bottom plate (1), and a flue vertical plate (7) is provided on the inclined partition plate (8); a combustion chamber (15) is formed between the bottom plate (1), the left vertical plate (2), and the combustion chamber vertical plate (6), and a flue gas channel (16) is formed between the combustion chamber vertical plate (6) and the flue vertical plate (7); a pollutant treatment chamber (17) is formed between the bottom plate (1), the right vertical plate (4), the inclined bottom plate (5), the flue vertical plate (7), and the inclined partition plate (8); A gas absorption chamber (19) is formed between the left vertical plate (2), the top plate (3), the right vertical plate (4), and the inclined partition plate (8); a gas guide channel (18) is formed between the inclined partition plate (8) and the gas guide inclined plate (9); an air inlet (21) and a compressed gas inlet (22) are provided on the left vertical plate (2); the compressed gas inlet (22) is connected to a compressed gas pipeline (10); the compressed gas pipeline (10) passes through the combustion chamber vertical plate (6), the flue vertical plate (7), and is connected to the pneumatic motor (11); the pneumatic motor (11) 1) is connected to an impeller (12); the impeller (12) is connected to the pneumatic motor (11) via an impeller support shaft (121), and the outer end of the impeller support shaft (121) supports and connects a wheel blade (122); an ultraviolet lamp (14) is arranged below the inclined partition plate (8), and the ultraviolet lamp (14) is located above the wheel blade (122); the outer surface of the wheel blade (122) is coated with titanium oxide; a supporting foot (13) is arranged below the inclined bottom plate (5); and a reactor discharge outlet (171) is arranged at the bottom of the pollutant treatment chamber (17).

2. The integrated reactor for treating rural non-point source pollution according to claim 1, characterized in that: The bottom of the gas absorption chamber (19) is provided with a gas absorption chamber discharge port (191).

3. The integrated reactor for treating rural non-point source pollution according to claim 1, characterized in that: The compressed gas pipeline (10) is made of metal.

4. The integrated reactor for treating rural non-point source pollution according to claim 1, characterized in that: The reactor can be placed on a cart or a trailer according to different specifications.

5. A method for treating rural non-point source pollution using a reactor as described in any one of claims 1 to 4, characterized in that: The processing method is: (1) Adding rural non-point source polluted water to be treated into the pollutant treatment chamber (17); (2) dissolving the straw ash in water and adding the water into the gas absorption chamber (19); (3) The ultraviolet lamp (14) and the pneumatic motor (11) start to work, and then straw is added into the combustion chamber (15) and ignited.

6. The method for treating rural non-point source pollution according to claim 5, characterized in that: When the reactor treats rural non-point source polluted water bodies caused by fertilizers and pesticides, the mass ratio of the straw used in the combustion chamber (15) to the treated water body in the pollutant treatment chamber (17) is 3 to 5:

100.

7. The method for treating rural non-point source pollution according to claim 5, characterized in that: When the reactor treats wastewater discharged from livestock and poultry farming, the mass ratio of the straw used in the combustion chamber (15) to the treated water in the pollutant treatment chamber (17) is 10-15:100.

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