A biological denitrification integrated equipment

Abstract

The present invention discloses an integrated biological denitrification device, including a treatment box divided into independent primary and secondary treatment areas and an equipment area, the primary treatment area is divided into a primary A pool and an O pool by a movable adjustment plate, a water distribution device and an aeration pipe corresponding to the primary A pool and the O pool are slidably connected to the treatment box, and a water inlet pipe connected to the water distribution device is provided, the secondary treatment area is divided into a secondary A pool and an MBR membrane pool connected at the bottom, the MBR membrane pool is connected with a sludge return pipe inclined downward and connected to the water inlet pipe at the bottom, a suction pump connected to the water outlet of the MBR membrane, an aeration fan connected to the aeration pipe and a delivery pump are provided in the equipment area, the inlet end of the delivery pump is connected to the O pool, and its outlet end is divided into two ways and respectively connected to the water inlet pipe and the secondary A pool. The present invention solves the technical problem of how to effectively reduce the energy consumption and operation and maintenance costs of the treatment equipment while meeting the treatment standard of high-nitrogen wastewater, and enhancing the adaptability to water quality changes.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an integrated biological denitrification device. Background Art

[0002] For wastewater with high nitrogen concentration, such as slaughterhouse wastewater, beer wastewater, fur wastewater and chemical wastewater, two-stage A / O process is currently used to denitrify it to ensure that it meets the discharge standards. This not only requires a large proportion of return sludge return pump, mixed liquid return pump and uninterrupted operation of the mixer, but also the volume of the anoxic zone and the aerobic zone cannot be adjusted, which not only leads to the large footprint and complex structure of the existing biological denitrification equipment, but also leads to high energy consumption, high operation and maintenance costs, low load and poor adaptability to water quality changes. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is how to effectively reduce the energy consumption and operation and maintenance costs of the treatment equipment while meeting the treatment standards for high-nitrogen wastewater and enhancing the adaptability to water quality changes.

[0004] In order to solve the above technical problems, the present invention provides an integrated biological denitrification device, including a treatment box, wherein the treatment box is divided into an independent primary treatment area and a secondary treatment area and an equipment area which are arranged side by side from top to bottom on the lateral side of the primary treatment area by a partition, and an adjustment plate which can be moved laterally and divides the primary treatment area into a primary A pool and an O pool is vertically arranged in the primary treatment area, and the adjustment plate opens an overflow port on the primary treatment area, and the top of the primary treatment area is horizontally slidably connected with a water distribution device and an aeration pipe corresponding to the water distribution device suspended in the primary A pool and the O pool and stirring by the reverse thrust of the water outlet, and the side wall thereof is provided with a water distribution device connected to the distribution device. A water inlet pipe connected to a water device is provided in the secondary treatment area, a guide plate is vertically arranged in the secondary treatment area to divide it into a secondary A tank and an MBR membrane tank connected at the bottom, a sludge return pipe inclined downward is connected on the side wall of the MBR membrane tank, and the bottom end of the sludge return pipe is connected to the water inlet pipe, a suction pump connected to the water outlet of the MBR membrane, an aeration fan and a delivery pump connected to the aeration pipe are provided in the equipment area, the inlet end of the delivery pump is connected to the O tank, and the outlet end thereof is divided into two paths, one path is connected to the water inlet pipe through a first flow valve, and the other path is connected to the secondary A tank through a second flow valve.

[0005] In one embodiment of the present invention, the water distribution device includes a cylinder, a water outlet hood adapted to be rotatably connected to the bottom of the cylinder, and a water outlet pipe connected to the bottom of the water outlet hood, the water outlet pipe consisting of a first water outlet pipe, at least three second water outlet pipes and a third water outlet pipe having the same number as the second water outlet pipes, the first water outlet pipe is located at the center of the bottom of the water outlet hood, the second water outlet pipe and the third water outlet pipe are evenly spaced and distributed on the same virtual circle with the center of the bottom of the water outlet hood as the center, the outlet ends of the third water outlet pipe and the first water outlet pipe are both facing downward, the outlet end of the second water outlet pipe is facing the tangent direction of the circle in which it is located in a clockwise or counterclockwise direction, and the outlet end of the water inlet pipe penetrates into the cylinder and is located downward on the central axis of the cylinder.

[0006] In one embodiment of the present invention, a first walking track and a second walking track are correspondingly installed on the two horizontal top edges of the primary treatment area, three first walking wheels with brakes that are rollingly matched with the first walking track are arranged side by side on the first walking track, and three second walking wheels that are rollingly matched with the first walking wheels corresponding to the first walking wheels are arranged on the second walking track, and a transmission frame is connected between the corresponding first walking wheels and the second walking wheels, and the three transmission frames are respectively connected to the water distribution device, the adjustment plate and the aeration pipe.

[0007] In one embodiment of the present invention, a wear-resistant sealing pad is provided on the peripheral surface of the adjustment plate.

[0008] In one embodiment of the present invention, the overflow port and the adjustment plate are integrally formed.

[0009] In one embodiment of the present invention, lifting ears are symmetrically provided on both side walls of the processing box, and a plurality of anchor rollers are installed at the bottom thereof.

[0010] The above technical solution of the present invention has the following advantages compared with the prior art:

[0011] 1. The present invention makes the sizes of the primary A pool and the O pool adjustable by setting a movable adjustment plate, so that the device can cope with water quality fluctuations within a certain range and enhance the adaptability to water quality changes.

[0012] 2. The present invention saves the pool capacity and greatly improves the processing load by converting the secondary O pool into an MBR membrane pool.

[0013] 3. The present invention provides a water distribution device for stirring by utilizing the reverse thrust of the effluent in the primary A pool and connects the secondary A pool with the bottom of the MBR pool, so that there is no need to equip the primary A pool and the secondary treatment area with an uninterrupted mixer; the inlet end of the delivery pump is connected with the O pool, and its outlet end is divided into two paths, one path is connected with the water inlet pipe through the first flow valve, and the other path is connected with the secondary A pool through the second flow valve, and the sludge return pipe is connected obliquely downward between the MBR membrane pool and the primary A pool, so that water delivery and reflux of sludge and mixed liquid can be achieved with only one pump, which not only greatly simplifies the structure of the equipment and realizes integration, but also greatly reduces the operation and maintenance cost and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the water distribution device in the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the water distribution device in the present invention when viewed from above;

[0019] Explanation of the reference numerals in the specification: 10. treatment box; 101. primary A pool; 102. O pool; 103. secondary A pool; 104. MBR membrane pool; 105. equipment area; 20. partition; 30. regulating plate; 40. water distribution device; 401. cylinder; 402. water outlet hood; 403. water outlet pipeline; 4031. first water outlet pipe; 4032. second water outlet pipe; 4033. third water outlet pipe; 50. aeration pipe; 60. water inlet pipe; 70. guide plate; 80. sludge return pipe; 90. suction pump; 100. aeration fan; 110. delivery pump; 120. first flow valve; 130. second flow valve; 140. first walking track; 150. second walking track; 160. first walking wheel; 170. second walking wheel; 180. transmission frame. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0021] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions with reference to the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0022] Reference Figure 1 and Figure 2As shown, a biological denitrification integrated equipment includes a treatment box 10, the treatment box 10 is divided into an independent primary treatment area and a secondary treatment area and an equipment area 105 located side by side from top to bottom on the lateral side of the primary treatment area by a partition 20, the primary treatment area is vertically provided with an adjustment plate 30 that can be moved laterally and divides it into a primary A pool 101 and an O pool 102, the adjustment plate 30 opens an overflow port on the primary treatment area, and a wear-resistant sealing pad is provided on the peripheral surface of the adjustment plate 30, the top of the primary treatment area is horizontally slidably connected with a water distribution device 40 and an aeration pipe 50 correspondingly suspended in the primary A pool 101 and the O pool 102 for stirring by using the reverse thrust of the water outlet, and a side wall thereof is provided with a water distribution device 40 that is connected to the water distribution device 40 The secondary treatment area is vertically provided with a guide plate 70 which divides the secondary treatment area into a secondary A pool 103 and an MBR membrane pool 104 which are connected at the bottom. The side wall of the MBR membrane pool 104 is connected with a sludge return pipe 80 which is inclined downward. The bottom end of the sludge return pipe 80 is connected to the water inlet pipe 60. The equipment area 105 is provided with a suction pump 90 connected to the water outlet of the MBR membrane, an aeration fan 100 connected to the aeration pipe 50 and a delivery pump 110. The inlet end of the delivery pump 110 is connected to the O pool 102, and its outlet end is divided into two paths, one path is connected to the water inlet pipe 60 through a first flow valve 120, and the other path is connected to the secondary A pool 103 through a second flow valve. By setting a movable adjustment plate 30, the sizes of the primary A pool 101 and the O pool 102 can be adjusted to cope with water quality fluctuations within a certain range; and by setting a water distribution device 40 for stirring by using the reverse thrust of the water outlet in the primary A pool 101 and connecting the secondary A pool 103 with the bottom of the MBR pool, it is unnecessary to equip the primary A pool 101 and the secondary treatment area with an uninterrupted mixer, and the inlet end of the delivery pump 110 is connected to the O pool 102, and its outlet end is divided into two paths, one is connected to the O pool 102, and the other is connected to the O pool 102. One path is connected to the water inlet pipe 60 through the first flow valve 120, the other path is connected to the secondary A tank 103 through the second flow valve, and the high-end MBR membrane tank 104 and the ground end are connected to the primary A tank 101. The setting of the sludge return pipe 80 makes it possible to return the sludge and mixed liquid and transport the water with only one pump, thereby achieving the technical effect of effectively reducing the energy consumption and operation and maintenance costs of the treatment equipment while meeting the treatment standards for high-nitrogen wastewater, and enhancing the adaptability to water quality changes.

[0023] Specifically, the first walking track 140 and the second walking track 150 are correspondingly installed on the two horizontal top edges of the primary treatment area. The first walking track 140 is provided with three first walking wheels 160 with brakes and rolling therewith, and the second walking track 150 is provided with three second walking wheels 170 with rolling therewith and corresponding to the first walking wheels 160. A transmission frame 180 is connected between the corresponding first walking wheels 160 and the second walking wheels 170, and the three transmission frames 180 are respectively connected to the water distribution device 40, the adjustment plate 30 and the aeration pipe 50.

[0024] Reference Figure 3 and Figure 4 As shown, the water distribution device 40 includes a cylinder 401, a water outlet cover 402 adapted to be rotatably connected to the bottom of the cylinder 401, and a water outlet pipe 403 connected to the bottom of the water outlet cover 402, wherein the water outlet pipe 403 is composed of a first water outlet pipe 4031, at least three second water outlet pipes 4032, and a third water outlet pipe 4033 having the same number as the second water outlet pipes 4032. The first water outlet pipe 4031 is located at the center of the bottom of the water outlet cover 402, and the third water outlet pipe 4033 is located at the center of the bottom of the water outlet cover 402. The second water outlet pipes 4032 and the third water outlet pipe 4033 are evenly spaced on the same virtual circle with the center of the bottom of the water outlet cover 402 as the center of the circle, the outlet ends of the third water outlet pipe 4033 and the first water outlet pipe 4031 are both facing downward, the outlet end of the second water outlet pipe 4032 is facing the tangent direction of the circle in which it is located in a clockwise or counterclockwise direction, and the outlet end of the water inlet pipe 60 penetrates into the cylinder 401 and is located downward on the central axis of the cylinder 401.

[0025] The overflow port and the adjustment plate 30 are integrally formed, and such an arrangement makes the adjustment plate 30 compact in structure and high in strength, thereby extending its service life.

[0026] The two side walls of the processing box 10 are symmetrically provided with lifting ears, and a plurality of anchor rollers are installed at the bottom thereof. This arrangement ensures the stability of the operation of the equipment on the one hand, and facilitates the turnover of the equipment on the other hand.

[0027] Through experiments, it can be known that when the water treatment capacity of the equipment is 60t / d, under the condition that the sludge concentration in the system and the treatment load of each unit remain unchanged, the COD: 500mg / L, BOD: 250mg / L and TN: 125mg / L in the influent water quality are correspondingly transformed into COD: 640mg / L, BOD: 350mg / L and TN: 70mg / L. It is only necessary to move the regulating plate 30 away from the secondary A tank 103 to change the size of the primary A tank 101 from 2m×2.5m×3m to 1m×2.5m×3m. After adjustment, the effluent requirements can meet the required "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" (GB 18918-2002) Class B standard; at the same time, in terms of the configuration of the device, during the treatment process, this equipment only needs to be equipped with one delivery pump 110. If the power is calculated as 2.2kw, according to the existing two-stage A / O process, it is necessary to equip two 0.37kw mixers, a 1.5kw mixed liquid return pump, a 0.75kw sludge return pump and a 0.37kw secondary O pool 102 water inlet pump, totaling 3.36kw, which saves about 53% of energy. Therefore, while meeting the treatment of high-nitrogen wastewater, this equipment can effectively reduce energy consumption and operation and maintenance costs, and can cope with changes in water quality.

[0028] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A biological denitrification integrated equipment, characterized in that: The invention comprises a treatment box, wherein the treatment box is divided into an independent primary treatment area and a secondary treatment area and an equipment area which are arranged side by side on the lateral side of the primary treatment area from top to bottom by a partition, wherein an adjustment plate which can be moved laterally and divides the primary treatment area into a primary A pool and an O pool is vertically arranged in the primary treatment area, wherein an overflow port is opened on the adjustment plate on the primary treatment area, wherein a water distribution device and an aeration pipe which are suspended in the primary A pool and the O pool and stir by the reverse thrust of the water outlet are connected to the top of the primary treatment area in a horizontal sliding manner, and a water inlet pipe which is connected to the water distribution device is arranged on the side wall, wherein the secondary treatment area is provided with a water distribution device ... A guide plate is vertically arranged in the stage treatment area to divide it into a secondary A pool and an MBR membrane pool which are connected at the bottom. A sludge return pipe inclined downward is connected to the side wall of the MBR membrane pool. The bottom end of the sludge return pipe is connected to the water inlet pipe. A suction pump connected to the water outlet of the MBR membrane, an aeration fan connected to the aeration pipe and a delivery pump are arranged in the equipment area. The inlet end of the delivery pump is connected to the O pool, and its outlet end is divided into two paths, one path is connected to the water inlet pipe through the first flow valve, and the other path is connected to the secondary A pool through the second flow valve; The water distribution device includes a cylinder, a water outlet cover adapted to be rotatably connected to the bottom of the cylinder, and a water outlet pipeline connected to the bottom of the water outlet cover, wherein the water outlet pipeline is composed of a first water outlet pipe, at least three second water outlet pipes, and a third water outlet pipe having the same number as the second water outlet pipes, the first water outlet pipe is located at the center of the bottom of the water outlet cover, the second water outlet pipe and the third water outlet pipe are evenly spaced and distributed on the same virtual circle with the center of the bottom of the water outlet cover as the center, the outlet ends of the third water outlet pipe and the first water outlet pipe are both facing downward, the outlet end of the second water outlet pipe is facing the tangent direction of the circle in which it is located in a clockwise or counterclockwise direction, and the outlet end of the water inlet pipe penetrates into the cylinder and is located downward on the central axis of the cylinder; The first walking track and the second walking track are correspondingly installed on the two horizontal top edges of the primary treatment area. The first walking track is provided with three first walking wheels with brakes and rolling therewith in parallel. The second walking track is provided with three second walking wheels with rolling therewith and corresponding to the first walking wheels. A transmission frame is connected between the corresponding first walking wheels and the second walking wheels. The three transmission frames are respectively connected to the water distribution device, the adjustment plate and the aeration pipe.

2. The integrated biological denitrification equipment according to claim 1, characterized in that: A wear-resistant sealing pad is arranged on the peripheral surface of the adjusting plate.

3. The integrated biological denitrification equipment according to claim 1, characterized in that: The overflow port and the adjustment plate are integrally formed.

4. The integrated biological denitrification equipment according to claim 1, characterized in that: The two side walls of the processing box are symmetrically provided with lifting ears, and a plurality of anchor rollers are installed at the bottom thereof.

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