A sewage deoxidation and phosphorus removal treatment device and method

Abstract

The present invention belongs to the technical field of sewage treatment, and discloses a sewage deoxidation and dephosphorization treatment device and method. The device includes a PE filler module and a logic operation circuit module; the PE filler module is arranged inside a stainless steel reactor, including a PE filler and an anode plate arranged between the PE fillers; the logic operation circuit module is arranged in a PLC control box together with a power supply; the positive and negative poles of the power supply are respectively connected to the anode plate and the outer shell of the stainless steel reactor; the logic operation circuit module is connected to a pressure gauge and a power supply arranged on the water inlet pipeline of the stainless steel reactor through a signal cable for signal and control. The device of the present invention can be applied to a sewage treatment system with high dissolved oxygen in the inlet water and a large phosphorus load, and is arranged between the MBR process and the deep treatment unit to ensure efficient denitrification and dephosphorization treatment effects.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular, relates to a sewage deoxidation and dephosphorization treatment device and method. Background Art

[0002] As the general public's requirements for the quality of living environment are increasing, the water quality of sewage treatment in various regions has been raised accordingly, and the emission limits for nitrogen and phosphorus pollutants are particularly stringent. Major urban sewage treatment plants and extensive rural sewage treatment stations have added different deep treatment units for nitrogen and phosphorus removal after the MBR process; however, due to process factors, the MBR produced water often has a high dissolved oxygen characteristic, which can reach 6-9 mg / L, seriously affecting the nitrogen and phosphorus removal effect of the deep treatment unit.

[0003] Phosphorus removal is divided into two processes: chemical phosphorus removal and biological phosphorus removal. Biological phosphorus removal is a relatively economical method, but it is not stable. Due to the large fluctuations of rural domestic sewage, complex terrain, temperature and other factors, the characteristics of this process cannot guarantee the stable achievement of the 0.3mg / L rural effluent standard. The basic principle of chemical phosphorus removal is to form insoluble phosphate precipitates by adding chemical agents, and finally remove phosphorus from sewage by solid-liquid separation. Its advantages are simple operation, good phosphorus removal effect, treatment efficiency of 80% to 90%, and stable effect. However, this method has the disadvantages of large dosage, high difficulty in automatic dosing control, inability to automatically add with water quality fluctuations, high investment cost, large amount of chemical sludge, and excessive dosage that easily damages sludge activity. It is difficult to apply in rural water quality sensitive areas.

[0004] In view of the above problems, it is necessary to carry out technological innovation and propose a new sewage deoxidation and phosphorus removal device and method. On the one hand, the dissolved oxygen in the water produced by the pre-treatment unit is reduced to ensure the nitrogen and phosphorus removal effect of the deep treatment unit; on the other hand, phosphorus is adsorbed and removed before the deep treatment unit to reduce the pressure of subsequent phosphorus treatment and achieve better treatment effects, while overcoming the adverse effects of biological treatment and chemical phosphorus removal. Summary of the invention

[0005] The purpose of the present invention is to provide a sewage deoxidation and phosphorus removal treatment device and method in view of the deficiencies of the prior art. The device of the present invention can be applied to sewage treatment systems with high dissolved oxygen in the influent and large phosphorus load, and is arranged between the MBR process and the deep treatment unit to ensure efficient nitrogen removal and phosphorus removal treatment effects, and has a simple structure, easy operation mode and high degree of automation.

[0006] In order to achieve the above-mentioned object, the present invention provides a sewage deoxidation and phosphorus removal treatment device on the one hand, which includes a PE filler module and a logic operation circuit module;

[0007] The PE filler module is arranged inside the stainless steel reactor; the PE filler module comprises PE fillers and anode plates spaced between the PE fillers;

[0008] The logic operation circuit module is arranged in a PLC control box together with a power supply; the positive and negative poles of the power supply are respectively connected to the anode plate and the outer shell of the stainless steel reactor; the logic operation circuit module is connected to the pressure gauge arranged on the water inlet pipeline of the stainless steel reactor and the power supply for signal and control via a signal cable, so as to realize water inlet pressure feedback and start and stop control of the power supply.

[0009] On the other hand, the present invention provides a method for deoxygenating and dephosphorizing sewage, which adopts the above-mentioned sewage deoxygenation and dephosphorization treatment device, including cyclically controlling the start and stop program of the power supply, the automatic backwashing program of the stainless steel reactor and the manual backwashing program of the stainless steel reactor through the above-mentioned logic operation circuit module, and then utilizing the above-mentioned PE filler module to perform the sewage deoxygenation and dephosphorization treatment.

[0010] The technical solution of the present invention has the following beneficial effects:

[0011] (1) The present invention can realize device operation fault judgment through multiple judgment operation modes.

[0012] (2) The device of the present invention has a simple structure and is easy to install. It is internally provided with a PE filler module, and the filler can be easily replaced. In particular, the new electrochemical deoxidation and phosphorus removal composite filter material is used to effectively treat phosphorus and ultra-high dissolved oxygen in sewage.

[0013] (3) By using the device of the present invention, dissolved oxygen can be reduced, excessive addition of carbon source can be avoided, and the cost of reagents can be saved; and the phosphorus removal effect can be achieved without adding phosphorus removal agents.

[0014] (4) The device of the present invention can realize automatic control of power supply start and stop according to the set value, thereby improving the deoxygenation and phosphorus removal efficiency of the device's influent water, thereby effectively improving the overall performance and efficiency of the sewage treatment system.

[0015] (5) The device of the present invention can automatically push alarm warnings according to the set value, prompting the operating personnel to maintain the device and judge the operating status of each treatment equipment; the operating personnel can use the online monitoring system to control the operating status of the device and the sewage treatment system in real time, reduce labor input, and reduce operation and maintenance costs.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0018] Figure 1 A schematic diagram of a sewage deoxidation and phosphorus removal treatment device provided in Example 1 of the present invention is shown.

[0019] The following are the descriptions of the reference numerals:

[0020] 1-water inlet pump; 2-pressure gauge; 3-sewage interceptor; 4-stainless steel reactor; 5-PLC control box; 6-power supply; 7-water outlet flange; 8-automatic backwash water outlet flange; 9-PE filler; 10-anode plate; 11-deoxidation and phosphorus removal composite filter material; 12-strip support plate; 13-water inlet flange; 14-manual backwash water inlet flange; 15-housing of stainless steel reactor; 16-backwash water outlet electric valve; 17-water inlet flow meter. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0022] In one aspect, the present invention provides a sewage deoxidation and phosphorus removal treatment device, which includes a PE filler module and a logic operation circuit module;

[0023] The PE filler module is arranged inside the stainless steel reactor; the PE filler module comprises PE fillers and anode plates spaced between the PE fillers;

[0024] The logic operation circuit module is arranged in a PLC control box together with a power supply; the positive and negative poles of the power supply are respectively connected to the anode plate and the outer shell of the stainless steel reactor; the logic operation circuit module is connected to the pressure gauge arranged on the water inlet pipeline of the stainless steel reactor and the power supply for signal and control via a signal cable, so as to realize water inlet pressure feedback and start and stop control of the power supply.

[0025] In the present invention, the positive and negative electrodes of the power supply are respectively connected to the anode plate and the outer shell of the stainless steel reactor through cables, that is, the outer shell of the stainless steel reactor is used as a cathode plate in the present invention.

[0026] According to the present invention, preferably, the device also includes a water inlet pump, a water inlet flow meter, a sewage interceptor and a manual backwash water inlet flange; the water inlet flow meter, the pressure gauge, the sewage interceptor and the manual backwash water inlet flange are sequentially arranged on the stainless steel reactor water inlet pipeline.

[0027] According to the present invention, preferably, a water inlet flange is provided at the bottom of the stainless steel reactor, and is connected to the stainless steel reactor water inlet pipeline between the sewage interceptor and the manual backwash water inlet flange through the water inlet flange.

[0028] According to the present invention, preferably, one end of the water inlet pump is connected to one end of the water inlet pipeline of the stainless steel reactor close to the water inlet flowmeter; and the other end of the water inlet pump is connected to the MBR unit.

[0029] According to the present invention, preferably, a manual backwash auxiliary device is connected to a side of the manual backwash water inlet flange away from the dirt interceptor.

[0030] According to the present invention, preferably, a water outlet flange and an automatic backwash water outlet flange are provided at the top of the stainless steel reactor, and a backwash water outlet electric valve is connected to the side of the automatic backwash water outlet flange away from the top of the stainless steel reactor; and the side of the water outlet flange away from the top of the stainless steel reactor is connected to a denitrification and phosphorus removal deep treatment unit.

[0031] According to the present invention, preferably, the dirt interceptor is a PP cotton filter element dirt interceptor, the accuracy of the dirt interceptor is 350-1000 meshes, and the filter element of the dirt interceptor can be replaced regularly.

[0032] According to the present invention, preferably, the PE filler module is arranged on a strip-shaped support plate inside the stainless steel reactor.

[0033] According to the present invention, preferably, the power supply is a 0-220V DC pulse power supply; the working voltage of the power supply is 12V-24V, the working current is 10-20A, the frequency is 0-10Hz, and the duty cycle is 50-90; the power supply is provided with a digital display screen.

[0034] According to the present invention, preferably, a deoxidation and dephosphorization composite filter material is provided in the PE filler; based on the total weight of the deoxidation and dephosphorization composite filter material, the deoxidation and dephosphorization composite filter material includes 80-88wt% of sponge iron, 7-9wt% of aluminum element, 4-6wt% of indium element and 3-5wt% of activated carbon.

[0035] According to the present invention, preferably, the particle diameter of the sponge iron is 5-8 mm.

[0036] On the other hand, the present invention provides a method for deoxygenating and dephosphorizing sewage, which adopts the above-mentioned sewage deoxygenation and dephosphorization treatment device, including cyclically controlling the start and stop program of the power supply, the automatic backwashing program of the stainless steel reactor and the manual backwashing program of the stainless steel reactor through the above-mentioned logic operation circuit module, and then utilizing the above-mentioned PE filler module to perform the sewage deoxygenation and dephosphorization treatment.

[0037] According to the present invention, preferably, the step of controlling the start and stop program of the power supply through the logic operation circuit module includes: setting a power-on pressure setting value and a power-off pressure setting value for the logic operation circuit module, and allowing the logic operation circuit module to receive the water inlet pressure feedback value of the pressure gauge and control the start and stop of the power supply.

[0038] According to the present invention, preferably, when the water inlet pressure feedback value is greater than or equal to the power-on pressure setting value, the logic operation circuit module controls the power to turn on to perform the wastewater deoxygenation and dephosphorization treatment.

[0039] According to the present invention, preferably, when the water inlet pressure feedback value is less than or equal to the power-off pressure setting value, the logic operation circuit module controls the power to be turned off to stop the wastewater deoxygenation and dephosphorization treatment.

[0040] According to the present invention, preferably, the power-on water inlet pressure setting value is greater than the power-off water inlet pressure setting value; the power-on water inlet pressure setting value and the power-off water inlet pressure setting value have a value range of 0-100 kPa respectively and independently.

[0041] According to the present invention, preferably, the step of controlling the automatic backwash program of the stainless steel reactor through the logic operation circuit module includes: setting a preparation backwash pressure setting value and a shutdown backwash pressure setting value for the logic operation circuit module, and allowing the logic operation circuit module to receive the water inlet pressure feedback value of the pressure gauge and push an alarm prompt.

[0042] According to the present invention, preferably, when the water inlet pressure feedback value is greater than or equal to the preparation backwash pressure setting value, an alarm prompt is pushed to start the automatic backwash procedure of preparing the stainless steel reactor.

[0043] According to the present invention, preferably, when the water inlet pressure feedback value is greater than or equal to the shutdown backwash pressure setting value, an alarm prompt is pushed to immediately perform the automatic backwash procedure of the stainless steel reactor, and the automatic backwash procedure of the stainless steel reactor is started.

[0044] According to the present invention, preferably, the steps of the automatic backwashing procedure of the stainless steel reactor include:

[0045] S1: After confirming that the instantaneous flow rate of the water inlet flow meter exceeds the flow rate threshold and delaying waiting, the logic operation circuit module controls the backwash water outlet electric valve to open, and performs the automatic backwashing according to the set automatic backwashing time;

[0046] S2: Within the set automatic backwashing duration, when the instantaneous flow of the water inlet flowmeter is less than the flow threshold, the logic operation circuit module controls the backwash water outlet electric valve to close, and one backwashing ends; after the instantaneous flow of the water inlet flowmeter exceeds the flow threshold, the logic operation circuit module controls the backwash water outlet electric valve to open, and the next automatic backwashing is performed until the automatic backwashing duration reaches the set automatic backwashing duration.

[0047] In the present invention, technicians can understand the operating status of the device by observing the values ​​(instantaneous flow rate, cumulative flow rate) uploaded by the water inlet flow meter to the logic operation circuit module in the PLC control box. If the instantaneous flow rate is "0" for 24 hours, the system enters the "water cut-off" state, and once every 24 hours, the system records the number of times, and the system feeds back the "water cut-off" state, and then outputs the alarm information that the device enters the water cut-off state.

[0048] According to the present invention, preferably, the step of the automatic backwashing program of the stainless steel reactor further includes recording the number of backwashing times within the set automatic backwashing time and adding 1 to record the number of backwashing times.

[0049] According to the present invention, preferably, the flow threshold is instantaneous flow ≥ 0.1m 3 / h.

[0050] According to the present invention, preferably, the delay waiting time is 2-4s.

[0051] According to the present invention, preferably, the set automatic backwashing time is 5-15 minutes.

[0052] According to the present invention, preferably, the shutdown backwash pressure setting value is greater than the preparation backwash pressure setting value; the value ranges of the preparation backwash pressure setting value and the shutdown backwash pressure setting value are independently 0-100 kPa.

[0053] According to the present invention, preferably, the step of controlling the manual backwashing procedure of the stainless steel reactor through the logic operation circuit module comprises: setting a manual backwashing pressure range value for the logic operation circuit module, and allowing the logic operation circuit module to receive the water inlet pressure feedback value of the pressure gauge;

[0054] According to the present invention, preferably, when the automatic backwashing procedure of the stainless steel reactor is completed and the water inlet pressure feedback value is greater than or equal to the manual backwashing pressure range value, the manual backwashing procedure of the stainless steel reactor is performed.

[0055] According to the present invention, preferably, the manual backwash pressure range value is from the minimum value of the preparation backwash pressure setting value to the maximum value of the shutdown backwash pressure setting value.

[0056] The present invention is specifically described below by way of examples.

[0057] Example 1

[0058] This embodiment provides a sewage deoxidation and phosphorus removal treatment device, which is applied to a rural sewage station treatment process "pretreatment unit + MBR unit + denitrification and phosphorus removal deep treatment unit" between the MBR unit and the denitrification and phosphorus removal deep treatment unit, and is installed at the front end of the denitrification and phosphorus removal deep treatment unit, such as Figure 1 As shown, the device includes a PE filler module, a logic operation circuit module (not shown), a water inlet pump 1, a water inlet flow meter 17, a sewage interceptor 3 and a manual backwash water inlet flange 14;

[0059] The PE filler module is arranged on a strip support plate 12 inside the stainless steel reactor 4; the PE filler module comprises a PE filler 9, a deoxidation and dephosphorization composite filter material 11 arranged inside the PE filler 9, and an anode plate 10 arranged between the PE fillers 9;

[0060] The logic operation circuit module is arranged in the PLC control box 5 together with the power supply 6; the positive and negative electrodes of the power supply 6 are respectively connected to the anode plate 10 and the housing 15 of the stainless steel reactor through cables, that is, the housing 15 of the stainless steel reactor is used as a cathode plate in this embodiment. The logic operation circuit module is connected to the pressure gauge 2 arranged on the water inlet pipeline of the stainless steel reactor and the power supply 6 for signal and control through a signal cable, so as to realize the water inlet pressure feedback and the start and stop control of the power supply 6.

[0061] The water inlet flowmeter 17, the pressure gauge 2, the sewage interceptor 3 and the manual backwash water inlet flange 14 are sequentially arranged on the water inlet pipeline of the stainless steel reactor; the sewage interceptor 3 is a PP cotton filter element sewage interceptor, the precision of the sewage interceptor 3 is 800 mesh, and the filter element can be replaced regularly. The technicians can understand the operating status of the device by observing the values ​​(instantaneous flow, cumulative flow) uploaded by the water inlet flowmeter 17 to the logic operation circuit module in the PLC control box 5. If the instantaneous flow rate is "0" for 24 hours, the system enters the "water cut-off" state, 24 hours as one time, the system records the number of times, and the system feedbacks the "water cut-off" state, and then pushes out the alarm information that the device enters the water cut-off state.

[0062] The bottom of the stainless steel reactor 4 is provided with a water inlet flange 13, and is connected to the stainless steel reactor water inlet pipeline between the sewage interceptor 3 and the manual backwash water inlet flange 14 through the water inlet flange 13;

[0063] One end of the water inlet pump 1 is connected to one end of the water inlet pipeline of the stainless steel reactor close to the water inlet flowmeter 17; the other end of the water inlet pump 1 is connected to the MBR unit;

[0064] A manual backwash auxiliary device is connected to the side of the manual backwash water inlet flange 14 away from the dirt interceptor 3;

[0065] The top of the stainless steel reactor 4 is provided with a water outlet flange 7 and an automatic backwash water outlet flange 8, that is, the water flow mode of the stainless steel reactor 4 adopts upward flow. The side of the automatic backwash water outlet flange 8 away from the top of the stainless steel reactor 4 is connected to the backwash water outlet electric valve 16; the side of the water outlet flange 7 away from the top of the stainless steel reactor 4 is connected to the denitrification and phosphorus removal deep treatment unit.

[0066] The power supply 6 is a 220V DC pulse power supply; the working voltage of the power supply 6 is 12V-24V, the working current is 15A, the frequency is 0-10Hz, and the duty cycle is 50-90; the power supply 6 is provided with a digital display screen.

[0067] Example 2

[0068] The present embodiment provides a method for deoxygenating and dephosphorizing sewage using the sewage deoxygenation and dephosphorization treatment device described in Example 1, the method comprising cyclically controlling the start and stop program of the power supply 6, the automatic backwashing program of the stainless steel reactor 4 and the manual backwashing program of the stainless steel reactor 4 through the logic operation circuit module, and then using the PE filler module to perform the sewage deoxygenation and dephosphorization treatment.

[0069] The steps of controlling the start and stop procedures of the power supply 6 by the logic operation circuit module include:

[0070] A power-on pressure setting value and a power-off pressure setting value are set for the logic operation circuit module, and the logic operation circuit module receives the water inlet pressure feedback value of the pressure gauge 2 and controls the start and stop of the power supply 6; when the water inlet pressure feedback value is greater than or equal to the power-on pressure setting value, the logic operation circuit module controls the power supply 6 to turn on and perform the wastewater deoxygenation and dephosphorization treatment; based on the total weight of the deoxygenation and dephosphorization composite filter material 11, the deoxygenation and dephosphorization composite filter material 11 includes 83wt% of sponge iron, 8wt% of aluminum element, 5wt% of indium element and 4wt% of activated carbon; the particle diameter of the sponge iron 11 is 5-8mm.

[0071] When the water inlet pressure feedback value is less than or equal to the power off pressure setting value, the logic operation circuit module controls the power supply 6 to be turned off, and stops the wastewater deoxygenation and dephosphorization treatment;

[0072] The water inlet pressure setting value when the power is turned on is 25kPa; the water inlet pressure setting value when the power is turned off is 10kPa.

[0073] The steps of controlling the automatic backwashing procedure of the stainless steel reactor 4 by the logic operation circuit module include:

[0074] The logic operation circuit module is set to a preparatory backwash pressure setting value of 45 kPa and a shutdown backwash pressure setting value of 60 kPa, and the logic operation circuit module is allowed to receive the water inlet pressure feedback value of the pressure gauge 2 and push an alarm prompt;

[0075] When the water inlet pressure feedback value is greater than or equal to the backwash preparation pressure setting value of 45 kPa, an alarm prompt is pushed to start the automatic backwashing procedure of the stainless steel reactor 4;

[0076] When the water inlet pressure feedback value is greater than or equal to the shutdown backwash pressure setting value of 60 kPa, an alarm prompt is pushed to immediately perform the automatic backwash procedure of the stainless steel reactor 4, and the automatic backwash procedure of the stainless steel reactor 4 is started;

[0077] The steps of the automatic backwashing procedure of the stainless steel reactor 4 include:

[0078] S1: After confirming that the instantaneous flow rate of the water inlet flow meter 17 exceeds the flow rate threshold and waiting for 3 seconds, the logic operation circuit module controls the backwash outlet electric valve 16 to open, and performs the automatic backwashing according to the set automatic backwashing time; the flow rate threshold is the instantaneous flow rate ≥ 0.1m 3 / h; the set automatic backwashing time is 10min;

[0079] S2: within the set automatic backwashing duration, when the instantaneous flow rate of the water inlet flow meter 17 is less than the flow rate threshold, the logic operation circuit module controls the backwashing water outlet electric valve 16 to close, and one backwashing is finished; after the instantaneous flow rate of the water inlet flow meter 17 exceeds the flow rate threshold, the logic operation circuit module controls the backwashing water outlet electric valve 16 to open, and the next automatic backwashing is performed until the automatic backwashing duration reaches the set automatic backwashing duration;

[0080] The steps of controlling the manual backwashing procedure of the stainless steel reactor 4 by the logic operation circuit module include:

[0081] The manual backwash pressure range value is set to 45 kPa-100 kPa for the logic operation circuit module, and the logic operation circuit module receives the water inlet pressure feedback value of the pressure gauge 2;

[0082] When the automatic backwashing procedure of the stainless steel reactor is completed and the water inlet pressure feedback value is greater than or equal to the manual backwashing pressure range value, the manual backwashing procedure of the stainless steel reactor 4 is performed.

[0083] The dissolved oxygen concentration of the sewage before treatment by the method of this embodiment is 7-9 mg / L, and the phosphorus concentration is 1.78-2.86 mg / L; the dissolved oxygen concentration of the sewage after treatment by the method of this embodiment is 2-4 mg / L, and the phosphorus concentration is 0.1-0.22 mg / L.

[0084] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for deoxidizing and dephosphorizing sewage, characterized in that: The sewage deoxidation and phosphorus removal treatment device adopted in the method includes a PE filler module and a logic operation circuit module; The PE filler module is arranged inside the stainless steel reactor; the PE filler module comprises PE fillers and anode plates spaced between the PE fillers; The logic operation circuit module is arranged in the PLC control box together with the power supply; the positive and negative electrodes of the power supply are respectively connected to the anode plate and the shell of the stainless steel reactor; the logic operation circuit module is connected to the pressure gauge arranged on the water inlet pipeline of the stainless steel reactor and the power supply for signal and control through a signal cable, so as to realize water inlet pressure feedback and start and stop control of the power supply; The PE filler is provided with a deoxidation and dephosphorization composite filter material; based on the total weight of the deoxidation and dephosphorization composite filter material, the deoxidation and dephosphorization composite filter material comprises 80-83wt% of sponge iron, 7-9wt% of aluminum, 4-6wt% of indium and 3-5wt% of activated carbon; The power supply is a 0-220V DC pulse power supply; the working voltage of the power supply is 12V-24V, the working current is 10-20A, the frequency is 0-10Hz, and the duty cycle is 50-90; The device also includes a water inlet pump, a water inlet flow meter, a sewage interceptor and a manual backwash water inlet flange; The water inlet flow meter, the pressure gauge, the dirt interceptor and the manual backwash water inlet flange are sequentially arranged on the water inlet pipeline of the stainless steel reactor; The bottom of the stainless steel reactor is provided with a water inlet flange, and is connected to the stainless steel reactor water inlet pipeline between the sewage interceptor and the manual backwash water inlet flange through the water inlet flange; One end of the water inlet pump is connected to one end of the water inlet pipeline of the stainless steel reactor close to the water inlet flowmeter; the other end of the water inlet pump is connected to the MBR unit; A manual backwash auxiliary device is connected to the side of the manual backwash water inlet flange away from the dirt interceptor; The top of the stainless steel reactor is provided with a water outlet flange and an automatic backwash water outlet flange, and the side of the automatic backwash water outlet flange away from the top of the stainless steel reactor is connected to a backwash water outlet electric valve; the side of the water outlet flange away from the top of the stainless steel reactor is connected to a denitrification and dephosphorization deep treatment unit; The sewage interceptor is a PP cotton filter element sewage interceptor, and the precision of the sewage interceptor is 350-1000 mesh; The method includes cyclically controlling the start and stop program of the power supply, the automatic backwashing program of the stainless steel reactor and the manual backwashing program of the stainless steel reactor through the logic operation circuit module, and then using the PE filler module to perform the deoxygenation and dephosphorization treatment of the sewage; The step of controlling the start and stop procedure of the power supply through the logic operation circuit module includes: setting a power on pressure setting value and a power off pressure setting value for the logic operation circuit module, and allowing the logic operation circuit module to receive the water inlet pressure feedback value of the pressure gauge and control the start and stop of the power supply; When the water inlet pressure feedback value is greater than or equal to the power-on pressure setting value, the logic operation circuit module controls the power to turn on to perform the wastewater deoxygenation and dephosphorization treatment; When the water inlet pressure feedback value is less than or equal to the power off pressure setting value, the logic operation circuit module controls the power off to stop the wastewater deoxygenation and dephosphorization treatment; The step of controlling the automatic backwashing procedure of the stainless steel reactor by the logic operation circuit module comprises: setting a preparation backwashing pressure setting value and a shutdown backwashing pressure setting value for the logic operation circuit module, and allowing the logic operation circuit module to receive the water inlet pressure feedback value of the pressure gauge and push an alarm prompt; When the water inlet pressure feedback value is greater than or equal to the backwash preparation pressure setting value, an alarm prompt is pushed to start the automatic backwashing program of the stainless steel reactor; When the water inlet pressure feedback value is greater than or equal to the shutdown backwash pressure setting value, an alarm prompt is pushed to immediately perform the automatic backwash procedure of the stainless steel reactor, and the automatic backwash procedure of the stainless steel reactor is started; The step of controlling the manual backwashing procedure of the stainless steel reactor through the logic operation circuit module comprises: setting a manual backwashing pressure range value for the logic operation circuit module, and allowing the logic operation circuit module to receive a water inlet pressure feedback value of the pressure gauge; When the automatic backwashing procedure of the stainless steel reactor is completed and the water inlet pressure feedback value is greater than or equal to the manual backwashing pressure range value, the manual backwashing procedure of the stainless steel reactor is performed.

2. The method for deoxidation and phosphorus removal of sewage according to claim 1, wherein: The PE filler module is arranged on a strip-shaped support plate inside the stainless steel reactor.

3. The method for deoxidation and phosphorus removal of sewage according to claim 1, wherein: The particle diameter of the sponge iron is 5-8 mm.

4. The method for deoxidation and phosphorus removal of sewage according to claim 1, wherein: The power supply is provided with a digital display screen.

5. The method for deoxidation and phosphorus removal of sewage according to claim 1, wherein: The power-on pressure setting value is greater than the power-off pressure setting value; the value ranges of the power-on pressure setting value and the power-off pressure setting value are independently 0-100 kPa.

6. The method for deoxidation and phosphorus removal of sewage according to claim 1, wherein: The steps of the automatic backwashing procedure of the stainless steel reactor include: S1: After confirming that the instantaneous flow rate of the water inlet flow meter exceeds the flow rate threshold and delaying waiting, the logic operation circuit module controls the backwash water outlet electric valve to open, and performs the automatic backwashing according to the set automatic backwashing time; S2: Within the set automatic backwashing duration, when the instantaneous flow of the water inlet flowmeter is less than the flow threshold, the logic operation circuit module controls the backwash water outlet electric valve to close, and one backwashing ends; after the instantaneous flow of the water inlet flowmeter exceeds the flow threshold, the logic operation circuit module controls the backwash water outlet electric valve to open, and the next automatic backwashing is performed until the automatic backwashing duration reaches the set automatic backwashing duration.

7. The method for deoxidation and phosphorus removal of sewage according to claim 6, wherein: The step of the automatic backwashing program of the stainless steel reactor also includes recording the number of backwashing times within the set automatic backwashing time and adding 1.

8. The method for deoxidation and phosphorus removal of sewage according to claim 6, wherein: The flow threshold is instantaneous flow ≥ 0.1m 3 / h.

9. The method for deoxidation and phosphorus removal of sewage according to claim 6, wherein: The delay waiting time is 2-4s.

10. The method for deoxidation and phosphorus removal of sewage according to claim 6, wherein: The set automatic backwash time is 5-15 minutes.

11. The method for deoxidation and phosphorus removal of sewage according to claim 6, wherein: The shutdown backwash pressure setting value is greater than the preparation backwash pressure setting value; the value ranges of the preparation backwash pressure setting value and the shutdown backwash pressure setting value are independently 0-100 kPa.

12. The method for deoxidation and phosphorus removal of sewage according to claim 1, wherein: The manual backwash pressure range value is from the minimum value of the preparation backwash pressure setting value to the maximum value of the shutdown backwash pressure setting value.

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