High-salt high-COD (Chemical Oxygen Demand) high-ammonia nitrogen denitrification treatment device

Abstract

The invention relates to the technical field of sewage treatment, and discloses a high-salt, high-COD and high-ammonia nitrogen denitrification treatment device which comprises a cylinder bottom plate, a cylinder body is mounted on the cylinder bottom plate, a cylinder top cover is arranged at the top of the cylinder body, a water inlet connecting pipe is arranged at the lower part of the cylinder body, a gas inlet connecting pipe is arranged above the water inlet connecting pipe, and a gas distributor is connected to the gas inlet connecting pipe; a filler support is arranged above the gas distributor, the filler support is filled with special filler, the special filler is used for adhering and growing halotolerant bacteria, a barrel top cover is arranged at the top of the barrel, a breathing tube is arranged on the barrel top cover, a water collecting tank is arranged below the barrel top cover, and a water outlet connecting pipe is installed on the side, adjacent to the water collecting tank, of the barrel. The special filler can effectively attach and grow halotolerant bacteria, so that good biological activity can still be kept under a high-salinity condition, and the denitrification efficiency is ensured. Through the arrangement of the gas distributor and the filler support and the application of the electric tracing band and the heat preservation layer, it is guaranteed that the device can stably operate in the low-temperature environment, and the adaptability and reliability of the system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a high-salt, high-COD, and high-ammonia nitrogen denitrification treatment device. Background Art

[0002] With the rapid development of industrialization, a large amount of high-salinity, high-chemical oxygen demand (COD) and high-ammonia nitrogen wastewater has been produced, which poses a serious threat to the natural environment and human health. High-salinity wastewater usually contains high concentrations of inorganic salts such as sodium chloride and sulfate, while high-COD wastewater contains rich organic matter. High-ammonia nitrogen wastewater is characterized by ammonia nitrogen content exceeding normal levels.

[0003] The difficulty in treating high-salinity wastewater lies in its high concentration of inorganic salts, which are not only difficult to remove by traditional biological treatment methods, but may also inhibit the activity of microorganisms. High COD wastewater contains a wide variety of organic matter, including large molecular organic matter that is difficult to degrade. These substances place high demands on biological treatment systems. As for high-ammonia nitrogen wastewater, the difficulty in treating it lies in the removal efficiency of ammonia nitrogen, because ammonia nitrogen is easily volatilized in water and may be converted into toxic nitrites under anaerobic conditions.

[0004] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop a high-salt, high-COD, and high-ammonia nitrogen denitrification treatment device. Summary of the invention

[0005] The object of the present invention is to provide a high-salt, high-COD and high-ammonia nitrogen denitrification treatment device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A technical solution for a high-salt, high-COD, and high-ammonia nitrogen denitrification treatment device, comprising a cylinder bottom plate, a cylinder body is installed on the cylinder bottom plate, a cylinder top cover is provided on the top of the cylinder body, a water inlet pipe is provided at the lower part of the cylinder body, an air inlet pipe is provided above the water inlet pipe, an air distributor is connected to the air inlet pipe, a filler bracket is provided above the air distributor, the filler bracket is filled with special filler, and the special filler is used for the attachment and growth of salt-tolerant bacteria, a cylinder top cover is provided on the top of the cylinder body, a breathing tube is provided on the cylinder top cover, a water collecting trough is provided below the cylinder top cover, and a water outlet pipe is installed on the cylinder body adjacent to the water collecting trough.

[0008] As a preferred technical solution, a manhole is provided on the top cover of the cylinder, and the breathing tube is arranged in an inverted U shape.

[0009] As a preferred technical solution, the edges of the cylinder top cover are symmetrically provided with lifting ears, and the cylinder top cover is provided with a railing fixing block and an aisle plate fixing block.

[0010] As a preferred technical solution, the outer wall of the outer cylinder of the special filler is wrapped with an electric heating belt, the outer side of the electric heating belt is wrapped with a thermal insulation layer, and the outer side of the thermal insulation layer is provided with a thermal insulation shell.

[0011] As a preferred technical solution, a plurality of gas distribution pipes are connected to the gas distributor, and a support frame is provided below the gas distribution pipes.

[0012] As a preferred technical solution, a plurality of reinforcing ribs are provided between the cylinder body and the cylinder bottom plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention is a high-salt, high-COD, high-ammonia nitrogen denitrification treatment device. The special filler provided can effectively attach and grow salt-tolerant bacteria, thereby maintaining good biological activity under high salinity conditions and ensuring denitrification efficiency. In addition, the device ensures stable operation even in low-temperature environments through the provision of an air distributor and a filler support, as well as the application of an electric heating cable and an insulation layer, thereby improving the adaptability and reliability of the system.

[0015] The device of the present invention also has the advantages of easy operation and low maintenance cost. The breathing tube and the water collection tank can effectively collect and discharge the gas and moisture generated during the treatment process, thereby avoiding secondary pollution. At the same time, the device has a compact structure and a small footprint, and is suitable for use in occasions with limited space.

[0016] In summary, the high-salinity, high-COD, and high-ammonia nitrogen denitrification treatment device of the present invention not only solves the technical difficulties encountered by traditional biological treatment methods in treating high-salinity, high-COD, and high-ammonia nitrogen wastewater, but also has the advantages of high efficiency, energy saving, stability, and environmental protection, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a high-salt, high-COD, high-ammonia nitrogen denitrification treatment device;

[0018] Figure 2 This is a schematic diagram of the top view of the structure of a high-salt, high-COD, and high-ammonia nitrogen denitrification treatment device.

[0019] In the accompanying drawings: 1. bottom plate of cylinder; 101. water inlet pipe; 102. air inlet pipe; 103. air distributor; 104. support frame; 11. cylinder body; 12. reinforcing ribs; 13. cylinder top cover; 14. manhole; 15. breathing tube; 16. lifting lug; 17. railing fixing block; 18. aisle plate fixing block; 21. water collecting trough; 22. water outlet pipe; 31. insulation shell; 32. insulation layer; 33. electric heating belt; 41. filler bracket; 42. special filler. DETAILED DESCRIPTION

[0020] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0021] like Figure 1 , Figure 2 As shown, the present invention provides a technical solution for a high-salt, high-COD, and high-ammonia nitrogen denitrification treatment device: it includes a cylindrical container, which is composed of a cylinder bottom plate 1 and a cylinder top cover 13, and a cylinder body 11 connects the cylinder bottom plate and the cylinder top cover. A water inlet pipe 101 is provided at the lower part of the cylinder body for introducing high-salt, high-COD, and high-ammonia nitrogen wastewater to be treated. An air inlet pipe 102 is provided above the water inlet pipe 101, and the air inlet pipe is connected to an air distributor 103, which is used to uniformly transport air into the cylinder to provide oxygen required for microbial growth. A filler bracket 41 is provided above the air distributor, and the filler bracket is filled with a special filler 42. The special filler is designed for the attachment and growth of salt-tolerant bacteria, which can effectively degrade organic matter and remove ammonia nitrogen under high salinity conditions. A breathing tube 15 is provided on the cylinder top cover, and the breathing tube is used to discharge the gas generated during the treatment process.

[0022] A water collection tank 21 is provided below the top cover of the cylinder to collect water generated during the treatment process to avoid secondary pollution. A water outlet pipe 22 is installed on the cylinder body adjacent to the water collection tank to discharge the treated wastewater. Lifting ears 16 are symmetrically provided at the edge of the top cover of the cylinder for installation and movement of the device. A railing fixing block 17 and an aisle plate fixing block 18 are also provided on the top cover of the cylinder to ensure the safety of the operator.

[0023] The outer wall of the cylinder outside the special filler 42 is wrapped with an electric heating belt 33, the electric heating belt 33 is wrapped with a thermal insulation layer 32, and the thermal insulation shell 31 is arranged outside the thermal insulation layer 33 to achieve thermal insulation.

[0024] The air distributor 103 is connected with a plurality of air distribution pipes (not shown in the figure), and a support frame 104 is arranged below the air distribution pipes to ensure the stability and uniform air distribution of the air distributor. A plurality of reinforcing ribs 12 are arranged between the cylinder body and the cylinder bottom plate to enhance the structural strength of the device.

[0025] Special filler 42 operates in anoxic environment, and a large number of denitrifying bacteria (domesticated by adding high-salt-tolerant bacteria) grow on the surface of the filter material. The incoming water flows through the filter material layer by gravity, and the nitrate (NO3 - ) or nitrite (NO2- ) is adsorbed on the biofilm of the filter media carrier and reduced to nitrogen gas (N2) and released from the sewage, thereby realizing the denitrification process of the sewage. The granular filter media also has the function of intercepting suspended solids.

[0026] During the denitrification process, organic matter provides energy as an electron donor and is oxidized and degraded, using the nitrogen in the nitrate as an electron acceptor to reduce the nitrate nitrogen to nitrogen gas.

[0027] In the denitrification process, organic matter provides energy as an electron donor and is oxidized and degraded, using nitrogen in nitrate as an electron acceptor to reduce nitrate nitrogen to nitrogen gas. The reaction formula is as follows:

[0028] NO 3- +1.08CH3OH+0.24H2CO3→0.056C5H7NO2+0.47N2↑+1.68H2O+HCO3 -

[0029] NO2 - +0.67CH3OH+0.53H2CO3→0.04C5H7NO2+0.48N2↑+1.23H2O+HCO3 - .

[0030] In order to accurately control the amount of carbon source added, the device adopts the carbon source addition mechanism of "inlet flow signal + inlet dissolved oxygen concentration signal + inlet nitrate nitrogen concentration signal + outlet nitrate nitrogen concentration signal" to ensure the normal biological activity of the denitrifying biological flora and avoid exceeding the BOD5 standard of the sewage treatment plant effluent.

[0031] According to the above scheme, in this embodiment, the high-salt, high-COD, and high-ammonia nitrogen wastewater to be treated is introduced into the cylinder 11 through the water inlet pipe 101. The wastewater flows from top to bottom in the cylinder, and after being evenly distributed by the air distributor 103, it fully contacts the special filler 42 on the filler support 41. The salt-tolerant bacteria attached to the surface of the special filler 42 begin to degrade organic matter in the wastewater and remove ammonia nitrogen under sufficient oxygen supply.

[0032] At the top of the cylinder 11, the breathing tube 15 is responsible for discharging the gas generated during the treatment process to maintain the normal pressure and gas exchange in the cylinder. At the same time, the water collection tank 21 under the cylinder top cover collects the water generated during the treatment process to ensure that the treated wastewater can be smoothly discharged through the water outlet pipe 22 to avoid secondary pollution.

[0033] In order to ensure the stable operation of the device in a low temperature environment, the electric heating cable 33 and the insulation layer 32 wrapped around the outer wall of the cylinder, as well as the external insulation shell 31, work together to provide the necessary insulation measures for the device. In addition, the reinforcing ribs 12 arranged between the cylinder body and the bottom plate of the cylinder enhance the structural strength of the entire device, ensuring its stability and durability under various working conditions.

[0034] In actual operation, the operating parameters of the device, such as inlet flow, dissolved oxygen concentration, inlet and outlet nitrate nitrogen concentration, etc., are monitored in real time by corresponding sensors and accurately controlled by the control system. This design not only ensures the normal biological activity of the denitrifying biological flora, but also effectively avoids the problem of excessive BOD5 in the outlet water, ensuring the stability and reliability of the treatment effect.

[0035] The high-salinity, high-COD, and high-ammonia nitrogen denitrification treatment device provided by the present invention can efficiently treat industrially generated high-salinity, high-COD, and high-ammonia nitrogen wastewater. The device has a reasonable structural design, is easy to operate, has low maintenance costs, and occupies a small area, and is very suitable for use in industrial wastewater treatment occasions with limited space. In addition, the device has excellent environmental performance, is environmentally friendly, and has significant social and economic benefits.

[0036] The working principle and use process of the present invention: After assembling the various components of the present solution in sequence, all the working steps can be completed by working in accordance with the above implementation methods in sequence according to actual needs.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0038] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0040] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on 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 high-salt, high-COD, high-ammonia nitrogen denitrification treatment device, characterized in that: The invention comprises a cylinder bottom plate (1), a cylinder body (11) is mounted on the cylinder bottom plate (1), a cylinder top cover (13) is arranged on the top of the cylinder body (11), a water inlet pipe (101) is arranged at the bottom of the cylinder body (11), an air inlet pipe (102) is arranged above the water inlet pipe (101), an air distributor (103) is connected to the air inlet pipe (102), a filler support (41) is arranged above the air distributor (103), the filler support (41) is filled with special filler (42), the special filler (42) is used for attaching and growing salt-tolerant bacteria, a cylinder top cover (13) is arranged on the top of the cylinder body (11), a breathing tube (15) is arranged on the cylinder top cover (13), a water collecting tank (21) is arranged below the cylinder top cover (13), and a water outlet pipe (22) is installed on the cylinder body (11) adjacent to the water collecting tank (21).

2. A high-salt, high-COD, high-ammonia nitrogen denitrification treatment device according to claim 1, characterized in that: A manhole (14) is provided on the cylinder top cover (13), and the breathing tube (15) is arranged in an inverted U shape.

3. A high-salt, high-COD, high-ammonia nitrogen denitrification treatment device according to claim 1, characterized in that: The edge of the cylinder top cover (13) is symmetrically provided with lifting ears (16), and the cylinder top cover (13) is provided with a handrail fixing block (17) and an aisle plate fixing block (18).

4. A high-salt, high-COD, high-ammonia nitrogen denitrification treatment device according to claim 1, characterized in that: The outer wall of the cylinder (11) outside the special filler (42) is wrapped with an electric heating belt (33), the electric heating belt (33) is wrapped with a thermal insulation layer (32), and a thermal insulation shell (31) is arranged outside the thermal insulation layer (32).

5. A high-salt, high-COD, high-ammonia nitrogen denitrification treatment device according to claim 1, characterized in that: The gas distributor (103) is connected to a plurality of gas distribution pipes, and a support frame (104) is provided below the gas distribution pipes.

6. A high-salt, high-COD, high-ammonia nitrogen denitrification treatment device according to claim 1, characterized in that: A plurality of reinforcing ribs (12) are arranged between the cylinder body (11) and the cylinder bottom plate (1).

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