Automatic identification method for leakage of suspended carrier in MBBR process

Abstract

The present invention discloses an automatic discrimination method for the leakage of suspended carriers in the MBBR process, which relates to the technical field of sewage treatment. By installing the required system at the end of the outlet pipeline of the MBBR process, the tail end of the total inlet pipe of the required system is connected with a first branch pipe and a second branch pipe designed in parallel. An interception screen system is arranged in the middle of the first branch pipe, and the interception screen system includes an interception screen and a scraper; valves are respectively arranged on the first branch pipe in front of and behind the interception screen; a first pressure gauge is arranged on the first branch pipe, and a second pressure gauge is arranged on the second branch pipe. By installing this system at the end of the outlet pipeline of the MBBR process, the blockage condition of the interception screen can be quickly and timely discriminated. Then, according to the relevant parameters T1 and T0, it can be further determined what causes the blockage of the interception screen. The method of the present invention can more quickly, accurately and comprehensively realize the timely and automatic identification of the leakage of suspended carriers in the MBBR process.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a method for automatically distinguishing leakage of a suspended carrier, and is particularly suitable for automatically distinguishing leakage of a suspended carrier in an MBBR process. Background Art

[0002] The Moving Bed Biofilm Reactor (MBBR) process achieves efficient and specific enrichment of functional bacteria by adding suspended carriers into the biochemical pool, thereby improving the pollutant removal capacity of the sewage treatment plant. Its core includes fluidization and interception. Good fluidization and interception are key factors to ensure that MBBR can function stably. In the early days of MBBR's introduction into China, due to the failure to solve its fluidization and interception problems, suspended carriers accumulated, causing the interception screen to be blocked or even broken, and suspended carriers were prone to leakage, and the back-end process equipment could not operate normally.

[0003] After years of development, MBBR technology has become one of the mainstream technologies for new, modified and expanded sewage treatment plants, with a domestic application scale of more than 25 million m 3 / d. It has been included in the newly released "Outdoor Drainage Design Standard" (GB50014-2021) as a widely used and reliable sewage treatment process. However, in actual operation, there may still be a potential risk of suspended carrier leakage due to poor operation. Once the suspended carrier leaks, it will first cause the back-end process equipment to fail to operate normally, resulting in the effluent failing to meet the standards and causing environmental pollution. At the same time, it is easy to cause equipment failure or damage, resulting in inestimable economic losses. The operation of conventional sewage treatment plants mainly relies on the operator's inspection and manual judgment of whether there is a suspended carrier leak. It is difficult to detect problems in a timely and accurate manner, and manual inspections are time-consuming and labor-intensive. Therefore, seeking a device that can timely and automatically detect whether a suspended carrier leak has occurred in the MBBR process is an important research direction in the field of sewage treatment technology.

[0004] Application No. 201920765625.5 discloses a MBBR reaction tank filler monitoring system, including: a liquid level switch installed on the upper part of the MBBR reaction tank; a first intermediate relay, including a first relay coil and a first relay contact group; the first relay coil is connected to the liquid level switch and is powered on after receiving a power-on signal; the second intermediate relay includes a second relay coil and a second relay contact group; the normally closed contact of the first relay contact group is connected in series with the second relay coil; an alarm is connected in series with the normally open contact of the second relay contact group, and when the second relay coil is powered on, the normally open contact closes to energize the alarm for reminder. When the liquid level is abnormal, an alarm can be triggered in time to remind the operator to go to the site for processing, effectively preventing the overflow and leakage of the filler.

[0005] The above-mentioned prior art monitors the MBBR reaction tank by using a photoacoustic alarm to monitor the abnormal liquid level, thereby reminding the staff to go to the site for timely treatment. However, it still has the following technical problems:

[0006] This technology is mainly aimed at the situation where the interception screen of the MBBR pool is not flowing smoothly, resulting in the overflow and leakage of the suspended carrier. There are two main reasons for the poor water flow through the interception screen. One is that the fiber hair blocks the screen, and the other is that the suspended carrier accumulates on the screen. The internal reason is that the fluidization effect of the suspended carrier is poor. Under the premise of good fluidization, the screen flows well and the liquid level will not rise. At this time, if the screen is damaged and the suspended carrier leaks, the alarm cannot be triggered. In addition, the liquid level of the aerobic MBBR pool is also in a state of constant change due to the influence of aeration, which is difficult to achieve accurate measurement. The liquid level change signal is more obvious when there is a significant increase in the liquid level. At this time, accidents are prone to occur, so the judgment node given by the liquid level meter is also delayed.

[0007] It can be seen that the filler monitoring system in the above-mentioned prior art needs to be further improved. Summary of the invention

[0008] The object of the present invention is to provide an automatic identification method for leakage of a suspended carrier in an MBBR process, which can realize timely automatic identification of leakage of a suspended carrier in an MBBR process more quickly, accurately and comprehensively.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An automatic identification method for leakage of suspended carrier in MBBR process comprises the following steps in sequence:

[0011] Step 1: Install the required system on the MBBR process outlet pipe

[0012] The required system includes an automatic control system, a main water inlet pipe and a main water outlet pipe. The main water inlet pipe is connected to the tail end of the water outlet pipe of the MBBR process. The tail end of the main water inlet pipe is connected to a first branch pipe and a second branch pipe in parallel design. Connecting pipes for maintaining the connection between the first branch pipe and the second branch pipe are respectively provided at both ends of the first branch pipe and the second branch pipe.

[0013] An interception screen system is arranged in the middle of the first branch pipe, and the interception screen system comprises an interception screen and a scraper; when the interception screen is pulled upward, it just contacts the scraper; a first valve and a second valve are arranged on the first branch pipe in front of and behind the interception screen respectively;

[0014] A first pressure gauge is provided on the first branch pipe between the intercepting screen and the first valve, and a second pressure gauge is provided on the second branch pipe opposite to the first pressure gauge; a third pressure gauge is provided at the main water outlet pipe end;

[0015] The automatic control system is used to collect and identify the signals of the first pressure gauge, the second pressure gauge and the third pressure gauge, make judgments based on the obtained signal values, and issue an alarm signal;

[0016] Step 2: During the operation of the system after installation, the ratio of the average value of the readings of the first pressure gauge to that of the second pressure gauge within a certain period of time is A; when the system is initially operating normally, the ratio of the average value of the readings of the first pressure gauge to that of the second pressure gauge within a certain period of time is A0;

[0017] Step 3: As the system runs, when A drops to 0.5A0, record the time period as T0. At this time, the reading of the first pressure gauge is less than the reading of the third pressure gauge and less than the reading of the second pressure gauge;

[0018] Step 4: Close the first valve and the second valve, and clean the hair debris blocking the interception screen by extracting the interception screen;

[0019] Step 5. After the cleaning of step 4 is completed, open the first valve and the second valve, and the system continues to run. When A < 0.85A0 is detected, repeat step 4; when A ≥ 0.85A0 is detected, the cleaning is completed. At this time, the reading of the first pressure gauge ≈ the reading of the second pressure gauge > the reading of the third pressure gauge;

[0020] Step 6: Open the first valve and the second valve, and the system continues to run. When A drops to 0.5A0 again, record the time period T1. At this time, the reading of the first pressure gauge is less than the reading of the third pressure gauge and less than the reading of the second pressure gauge. At this time, first determine the blockage of the intercepting screen and then clean it. The determination steps are as follows:

[0021] a. When the reading of the first pressure gauge is less than the reading of the third pressure gauge, it is determined that the interception screen is blocked. At this time, it is determined what is the cause of the blockage of the interception screen:

[0022] a1. When T1≤0.2T0, it is judged that the suspension carrier leaks and causes the screen to be blocked;

[0023] a2. When T1≥0.5T0, it is judged that the hair debris causes the screen to be blocked;

[0024] a3. When 0.2T0<T1<0.5T0, it is judged that there may be leakage of the suspended carrier causing the screen to be blocked;

[0025] When the judgment results of the above steps a1, a2, and a3 appear, further check whether there is suspension carrier accumulation at the observation port to confirm whether the suspension carrier is leaking, and execute step four.

[0026] The beneficial technical effects directly brought about by the above technical solution are:

[0027] The above system is installed at the tail end of the MBBR process effluent pipe, and can promptly, quickly and automatically identify the leakage of the suspended carrier of the MBBR process. Specifically, the system is connected in parallel with the first branch pipe and the second branch pipe, and the interception screen system, the first valve, the second valve and the first pressure gauge are set on the first branch pipe, and the second pressure gauge is set on the second branch pipe. The average value of the readings of the first pressure gauge and the second pressure gauge within a certain period of time can be used to quickly identify the blockage of the interception screen, and then the cause of the blockage of the interception screen can be further determined based on the relevant parameters T1 and T0.

[0028] As a preferred solution of the present invention, an observation port is provided on the first branch pipe at the front end of the intercepting screen, and the observation port is connected to the first branch pipe through a flange.

[0029] As another preferred embodiment of the present invention, the intercepting screen is of extraction design; two scrapers are provided, which are respectively located on both sides of the intercepting screen and connected to the first branch pipe.

[0030] Preferably, the first pressure gauge, the second pressure gauge and the third pressure gauge have a pressure signal transmission function and can transmit the pressure signal to the automatic control system in real time.

[0031] Preferably, when T1≤0.2T0, the automatic control system determines that the suspension carrier leaks and causes the screen to be blocked and sends out a suspension carrier leakage alarm signal;

[0032] When T1≥0.5T0, the automatic control system determines that the hair debris causes the screen to be blocked and sends out a cleaning alarm signal;

[0033] When 0.2T0<T1<0.5T0, the automatic control system determines that there may be leakage of the suspended carrier causing the screen to be blocked and issues a suspended carrier leakage warning signal.

[0034] Preferably, the opening diameter of the intercepting screen is 40% to 80% of the diameter of the suspension carrier, and the opening rate of the intercepting screen is greater than 40%.

[0035] Preferably, the distance between the end of the intercepting screen close to the observation port and the intercepting screen is less than 10 cm.

[0036] Preferably, the distance between the first pressure gauge and the first valve is greater than twice the diameter of the first branch pipe, and the distance between the third pressure gauge and the connecting pipe between the first branch pipe and the second branch pipe is greater than twice the diameter of the total water outlet pipe.

[0037] Preferably, the distance between the water-facing surface of the interception system and the connecting pipe between the first branch pipe and the second branch pipe is greater than three times the diameter of the first branch pipe.

[0038] Preferably, the diameters of the first branch pipe and the second branch pipe should be 70% to 120% of the total water inlet pipe.

[0039] Compared with the prior art, the present invention brings the following beneficial technical effects:

[0040] (1) The automatic identification method for suspended carrier leakage in the MBBR process proposed in the present invention can promptly and quickly determine whether there is suspended carrier leakage in the MBBR process. The core equipment is a pressure gauge, which is more economical than equipment such as a liquid level meter and a flow meter.

[0041] (2) The leakage of the suspended carrier is indirectly reflected by the pressure change of the pressure gauge outside the pipeline. It is convenient and quick to judge whether the suspended carrier is leaking without removing the pipeline.

[0042] (3) The pressure change of the pressure gauge is used to determine whether there is leakage of the suspended carrier. This method is more accurate than level meters and manual inspections, and the data is more reliable and stable.

[0043] (4) By providing the first branch pipe and the second branch pipe in parallel, the risk of front-end overflow caused by blockage of the interception screen is avoided.

[0044] (5) The intercepting screen of the present invention is of a removable design and is equipped with scrapers on both sides, which can realize easy cleaning of hair debris blockage.

[0045] (6) This system can be combined with an automatic control system to realize automatic judgment, without the need for manual inspection, thus saving manpower investment; In summary, the automatic judgment method for suspended carrier leakage in the MBBR process of the present invention can realize timely and automatic identification of suspended carrier leakage in the MBBR process, and is easy to install and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with the accompanying drawings:

[0047] Figure 1 This is a flow chart of the automatic identification method for leakage of suspended carrier in MBBR process according to the present invention;

[0048] Figure 2 This is a structural diagram of the interception screen of the present invention;

[0049] Figure 3 This is a schematic diagram of the observation port structure of the present invention;

[0050] In the figure: 1, first valve, 2, second valve, 3, interception screen system, 4, observation port, 5, first branch pipe, 6, second branch pipe, P1, first pressure gauge, P2, second pressure gauge, P3, third pressure gauge. DETAILED DESCRIPTION

[0051] The present invention proposes an automatic identification method for leakage of a suspended carrier in an MBBR process. In order to make the advantages and technical solutions of the present invention clearer and more specific, the present invention is further described below in conjunction with specific embodiments.

[0052] like Figure 1 As shown, the system required by the present invention includes a main water inlet pipe, a main water outlet pipe, a first valve 1, a second valve 2, an interception screen system 3, a first branch pipe 5 and a second branch pipe 6. The second branch pipe 6 is parallel to the first branch pipe 5. Connecting pipes are respectively arranged between the first branch pipe and the second branch pipe, and the first branch pipe and the second branch pipe are kept connected by the connecting pipes. The first branch pipe, the connecting pipe and the second branch pipe are in a "U" shape as a whole.

[0053] The main water inlet pipe is connected to the tail end of the outlet pipe of the MBBR process, and the tail end of the main water inlet pipe is connected to the first branch pipe and the second branch pipe. The pipe diameters of the main water inlet pipe and the main water outlet pipe are the same as the pipe diameters of the first branch pipe and the second branch pipe.

[0054] like Figure 2 As shown, an interception screen system 3 is arranged in the middle of the first branch pipe, and the interception screen system 3 includes an interception screen and a scraper; when the interception screen is pulled upward, it just contacts the scraper; preferably, the interception screen adopts a pull-out design to facilitate its cleaning. In addition, in order to facilitate the cleaning of the blockage on the interception screen, scrapers are preferably arranged on both sides of the interception screen. When the interception screen is pulled upward, it contacts and rubs with the scraper, so that the blockage can be quickly cleaned.

[0055] The scraper is installed on both sides of the top of the interception screen, and the two sides are close to the interception screen to facilitate the cleaning of the interception screen. The interception screen includes an interception screen body and a number of regularly arranged holes located in the interception screen body. In order to better prevent the leakage of the suspended carrier, the opening diameter is 40% to 80% of the diameter of the suspended carrier, and the opening rate on the interception screen is greater than 40%. An observation port is set on the first branch pipe at the front end of the interception screen, and the observation port is connected to the first branch pipe through a flange.

[0056] A first valve and a second valve are respectively arranged on the first branch pipes in front of and behind the intercepting screen;

[0057] A first pressure gauge is arranged on the first branch pipe between the intercepting screen and the first valve, and a second pressure gauge is arranged on the second branch pipe opposite to the first pressure gauge; a third pressure gauge is arranged at the end of the total water outlet pipe, and the distance between the first pressure gauge and the first valve should be greater than twice the diameter of the first branch pipe, and the distance between the third pressure gauge and the connecting pipe between the first branch pipe and the second branch pipe should be greater than twice the diameter of the total water outlet pipe to prevent eddy currents from affecting the accuracy of pressure measurement.

[0058] The diameter of the first branch pipe and the second branch pipe should be 70% to 120% of the total water inlet pipe to prevent inaccurate pressure measurement caused by too fast or too slow flow rate.

[0059] The first valve and the second valve can be selected to open and close the valve automatically, which is more convenient for controlling the system.

[0060] The distance between the end of the observation port close to the interception screen and the interception screen is less than 10 cm, which is convenient for observing the suspended carrier.

[0061] The distance between the water-facing surface of the interception system and the connecting pipe of the first branch and the second branch should be greater than three times the diameter of the first branch to prevent the leaked suspended carrier from flowing directly from the second branch due to the vortex effect. In addition, in order to facilitate the overall control of the system, an automatic control system can also be designed to be used in conjunction with the system of the present application. The automatic control system can receive the pressure signal value transmitted in real time by the pressure gauge and perform calculations and judgments to give different alarm signals.

[0062] The above system is used to quickly identify the leakage of the suspended carrier in the MBBR process. Specifically, the system is installed at the tail end of the MBBR process outlet pipe. The leakage identification method is as follows:

[0063] 1. Assume that during the operation of the system after installation, the ratio of the average value of the readings of the first pressure gauge to that of the second pressure gauge within a certain period of time is A; Assume that when the system is initially operating normally, the ratio of the average value of the readings of the first pressure gauge to that of the second pressure gauge within a certain period of time is A0;

[0064] 2. As the system runs, when A drops to 0.5A0, it can be considered that the interception screen is blocked by 50%. At this time, the interception screen is more likely to be blocked than in normal operation. Therefore, the time period is recorded as T0, which is used as the judgment condition for the cleaning cycle of normal operation. At this time, the reading of the first pressure gauge P1 is less than the reading of the third pressure gauge P3 and less than the reading of the second pressure gauge P2;

[0065] 3. Close the first valve and the second valve, and clean the blockage at the interception screen by extracting the interception screen;

[0066] 4. After the cleaning is completed in step 4, open the first valve and the second valve, and the system continues to run. When A < 0.85A0 is detected, repeat step 4; when A ≥ 0.85A0 is detected, the cleaning is completed. At this time, the reading of the first pressure gauge ≈ the reading of the second pressure gauge > the reading of the third pressure gauge;

[0067] 5. Open the first valve and the second valve, and the system continues to run. When A drops to 0.5A0 again, record the time period T1. At this time, the reading of the first pressure gauge is less than the reading of the third pressure gauge and less than the reading of the second pressure gauge. At this time, first determine the blockage of the intercepting screen and then clean it. The determination steps are as follows:

[0068] a. When the reading of the first pressure gauge is less than the reading of the third pressure gauge, it is determined that the interception screen is blocked. At this time, it is determined what is the cause of the blockage of the interception screen:

[0069] a1. When T1≤0.2T0, the automatic control system determines that the leakage of the suspended carrier causes the screen to be blocked and sends out a leakage alarm signal;

[0070] a2. When T1≥0.5T0, the automatic control system determines that the hair scraps cause the screen to be blocked and sends out a cleaning alarm signal;

[0071] a3. When 0.2T0<T1<0.5T0, the automatic control system determines that there is leakage of the suspended carrier, causing the screen to be blocked and issues a suspended carrier leakage warning signal.

[0072] When the judgment result of the above step a3 appears, further check whether there is leakage of the suspended carrier at the observation port, and execute step 4.

[0073] The present invention is described in detail below with reference to specific embodiments.

[0074] Embodiment 1:

[0075] The biochemical process of a sewage plant adopts MBBR technology, and the above system is installed on the outlet pipe. During the initial normal operation after installation, the ratio A of the first pressure gauge P1 and the second pressure gauge P2 is 0.91-0.95, the average is 0.93, and A0=0.93 is recorded. After 19 days of normal operation, T0=19 is recorded, and the ratio A of the first pressure gauge P1 and the second pressure gauge P2 decreases to 0.45<0.5A0. The automatic control system issues an interception screen cleaning alarm. At this time, the interception screen is pulled out for cleaning. After cleaning, A recovers to 0.91-0.93, the average is 0.92>0.85A0, the alarm is lifted, and operation is resumed. During normal operation, 8 days after the screen was cleaned, A dropped to 0.4 and T1 was recorded as 8. At this time, 0.2T0<T1<0.5T0, and the automatic control system issued a leakage warning alarm. Further inspection of the observation port revealed a small amount of suspended carrier accumulation. Immediate inspection revealed a leak in the interception screen, which was repaired in time and no further leakage occurred.

[0076] Embodiment 2:

[0077] A sewage treatment plant adopts MBBR technology, and the above system is installed on the MBBR outlet pipe. After the initial installation, the ratio of the first pressure gauge P1 to the second pressure gauge P2 during normal operation is 0.93-0.97, with an average of 0.95, and A0=0.95 is recorded. After 33 days of normal operation, A dropped to 0.47<0.5A0, and the automatic control system issued an interception screen cleaning alarm. At this time, the interception screen was cleaned by extracting it. After cleaning, A recovered to 0.71-0.76, with an average of 0.73<0.85A0. After cleaning again, A recovered to 0.89-0.93, with an average of 0.92>0.85A0. The alarm was lifted and the operation was resumed. On one occasion, within 1 hour (T1), A quickly dropped to 0.45<0.5A0, T1<0.2T0, and the system issued a suspended carrier leakage alarm signal. The on-site personnel quickly checked the observation port and found that the suspended carrier was accumulated. The front-end screen was repaired in time to prevent large-scale leakage.

[0078] Parts not described in the present invention can be implemented by referring to the existing technology.

[0079] It should be noted that the specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. A method for automatically identifying leakage of suspended carriers in MBBR process, characterized in that: The following steps are included in sequence: Step 1: Install the required system on the outlet pipe of the MBBR process, the required system includes an automatic control system, a main water inlet pipe and a main water outlet pipe, the main water inlet pipe is connected to the tail end of the outlet pipe of the MBBR process, the tail end of the main water inlet pipe is connected to a first branch pipe and a second branch pipe in parallel design, and connecting pipes for maintaining the first branch pipe and the second branch pipe in communication are respectively provided at both ends of the first branch pipe and the second branch pipe; An interception screen system is arranged in the middle of the first branch pipe, and the interception screen system comprises an interception screen and a scraper; two scrapers are arranged, which are respectively located on both sides of the interception screen and connected to the first branch pipe; an observation port is arranged on the first branch pipe at the front end of the interception screen; When the intercepting screen is pulled upward, it just contacts the scraper; the first valve and the second valve are respectively arranged on the first branch pipes in front and behind the intercepting screen; A first pressure gauge is provided on the first branch pipe between the intercepting screen and the first valve, and a second pressure gauge is provided on the second branch pipe opposite to the first pressure gauge; a third pressure gauge is provided at the main water outlet pipe end; The automatic control system is used to collect and identify the signals of the first pressure gauge, the second pressure gauge and the third pressure gauge, make judgments based on the obtained signal values, and issue an alarm signal; Step 2: Assume that during the operation of the system after installation, the ratio of the average value of the readings of the first pressure gauge to that of the second pressure gauge within a certain period of time is A; Assume that when the system is initially operating normally, the ratio of the average value of the readings of the first pressure gauge to that of the second pressure gauge within a certain period of time is A0; Step 3: As the system runs, when A drops to 0.5 A0, record the time period as T0. At this time, the reading of the first pressure gauge is less than the reading of the third pressure gauge and less than the reading of the second pressure gauge; Step 4: Close the first valve and the second valve, and clean the blockage at the interception screen by extracting the interception screen; Step 5. After the cleaning of step 4 is completed, open the first valve and the second valve, and the system continues to run. When A < 0.85A0 is detected, repeat step 4; when A ≥ 0.85A0 is detected, the cleaning is completed. At this time, the reading of the first pressure gauge ≈ the reading of the second pressure gauge > the reading of the third pressure gauge; Step 6: Open the first valve and the second valve, and the system continues to run. When A drops to 0.5A0 again, record the time period T1. At this time, the reading of the first pressure gauge is less than the reading of the third pressure gauge and less than the reading of the second pressure gauge. At this time, first determine the blockage of the intercepting screen and then clean it. The determination steps are as follows: a. When the reading of the first pressure gauge is less than the reading of the third pressure gauge, it is determined that the interception screen is blocked. At this time, it is determined what is the cause of the blockage of the interception screen: a1. When T1≤0.2T0, it is judged that the suspension carrier leaks and causes the screen to be blocked; a2. When T1≥0.5T0, it is judged that the hair debris causes the screen to be blocked; a3. When 0.2T0<T1<0.5T0, it is judged that the suspension carrier may leak and cause the screen to be blocked; When the judgment result of the above step a3 appears, further check whether there is accumulation of suspended carrier at the observation port to confirm whether it is leakage of suspended carrier, and execute step 4.

2. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 1, characterized in that: The observation port is connected to the first branch pipe through a flange.

3. The automatic identification method for leakage of suspended carrier in MBBR process according to claim 1 is characterized in that: The intercepting screen is of extractable design.

4. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 1, characterized in that: The first pressure gauge, the second pressure gauge and the third pressure gauge have a pressure signal transmission function and can transmit the pressure signal to the automatic control system in real time.

5. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 4, characterized in that: When T1≤0.2T0, the automatic control system determines that the suspension carrier leaks and causes the screen to be blocked, and issues a suspension carrier leak alarm signal; When T1≥0.5T0, the automatic control system determines that the hair debris causes the screen to be blocked and sends out a screen cleaning alarm signal; When 0.2T0<T1<0.5T0, the automatic control system determines that there may be leakage of the suspended carrier causing the screen to be blocked; and sends out a leakage warning signal.

6. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 1, characterized in that: The opening diameter of the intercepting screen is 40% to 80% of the diameter of the suspension carrier, and the opening rate of the intercepting screen is greater than 40%.

7. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 2, characterized in that: The distance between the end of the observation port close to the interception screen and the interception screen is less than 10 cm.

8. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 1, characterized in that: The distance between the first pressure gauge and the first valve is greater than twice the diameter of the first branch pipe, and the distance between the third pressure gauge and the connecting pipe between the first branch pipe and the second branch pipe is greater than twice the diameter of the main water outlet pipe.

9. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 1, characterized in that: The distance between the water-facing surface of the intercepting screen system and the connecting pipe of the first branch pipe and the second branch pipe is greater than three times the diameter of the first branch pipe.

10. The method for automatically distinguishing leakage of suspended carrier in MBBR process according to claim 1, characterized in that: The diameters of the first branch pipe and the second branch pipe are 70% to 120% of the diameter of the total water inlet pipe.

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