CN115814502A - Automatic judgment method for leakage of MBBR (moving bed biofilm reactor) process suspension carrier - Google Patents
Automatic judgment method for leakage of MBBR (moving bed biofilm reactor) process suspension carrier Download PDFInfo
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- CN115814502A CN115814502A CN202211537967.4A CN202211537967A CN115814502A CN 115814502 A CN115814502 A CN 115814502A CN 202211537967 A CN202211537967 A CN 202211537967A CN 115814502 A CN115814502 A CN 115814502A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses an automatic judgment method for MBBR (moving bed biofilm reactor) process suspended carrier leakage, and relates to the technical field of sewage treatment. The tail end of an outlet pipeline of an MBBR process is provided with a required system, the tail end of a main water inlet pipe of the required system is connected with a first branch pipe and a second branch pipe which are designed in parallel, the middle part of the first branch pipe is provided with an interception screen mesh system, and the interception screen mesh system comprises an interception screen mesh and a scraper; valves are respectively arranged on the first branch pipes in front of and behind the intercepting 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 using the systemIs arranged at the tail end of an outlet pipeline of the MBBR technology, can quickly judge the blocking condition of the interception screen in time and then according to the related parameter T 1 And T 0 It is further possible to determine what causes the clogging of the intercepting screen. The method can more quickly, accurately and comprehensively realize the timely and automatic identification of the leakage of the MBBR process suspension carrier.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for automatically judging leakage of a suspension carrier, which is particularly suitable for automatically judging the leakage of the suspension carrier in an MBBR (moving bed biofilm reactor) process.
Background
The Moving Bed Biofilm Reactor (MBBR) process is a process that high-efficiency and specificity enrichment of functional bacteria is realized by adding a suspension carrier into a biochemical pool, so that the pollutant removal capacity of a sewage treatment plant is improved, and the core of the Moving Bed Biofilm Reactor process comprises fluidization and interception. Good fluidization and interception are key factors for ensuring that the MBBR can play a role stably, the MBBR is introduced into the initial stage in China, and because the fluidization and interception problems are not solved, the phenomenon that a suspended carrier is leaked easily occurs because the suspended carrier is accumulated to cause the blockage and even the breakage of an interception screen, and the back-end process equipment cannot operate normally.
The MBBR process has been developed for many years and is one of the mainstream processes of new reconstruction and extension of sewage treatment plants, and the domestic application scale exceeds 2500 ten thousand m 3 And d. And has been taken into newly-published outdoor drainage facility as a sewage treatment process with wide application and reliable operationIn the standard of design (GB 50014-2021), although there may still be a potential risk of leakage of the suspension carrier due to poor operation in actual operation, once the leakage of the suspension carrier occurs, the rear-end process equipment may not operate normally, so that the effluent water may not reach the standard, which may cause environmental pollution, and at the same time, the equipment may be damaged or broken, which may cause an economic loss difficult to estimate. The operation of conventional sewage plants mainly depends on operators to check the problems, and the problems can not be found accurately in time by artificially judging whether a suspended carrier leaks or not, and the manual inspection wastes time and energy. Therefore, finding a device capable of timely and automatically detecting whether the leakage of the suspended carrier occurs in the MBBR process is an important research direction in the technical field of sewage treatment.
Application number 201920765625.5 discloses an MBBR reaction tank filler monitoring system, including: a liquid level switch arranged at the upper part of the MBBR reaction tank; the first intermediate relay comprises a first relay coil and a first relay contact group; the first relay coil is connected with the liquid level switch and is electrified after receiving an electrifying signal; the second intermediate relay comprises a second relay coil and a second relay contact group; the normally closed contact of the first relay contact group is connected with the second relay coil in series; and the alarm is connected with the normally open contact of the second relay contact group in series, and the normally open contact is closed when the second relay coil is electrified, so that the alarm is electrified for reminding. When the liquid level is abnormal, the alarm can be given in time, the operation personnel can be reminded to carry out on-site treatment, and the filler overflow leakage is effectively prevented.
Above-mentioned prior art monitors the liquid level unusually through adopting the photoacoustic alarm to remind the staff in time to monitor the MBBR reaction tank to the mode of handling in the scene, but it still has following technical problem:
this technique is mainly to the MBBR pond interception screen cloth water is crossed smoothly and is leaded to the liquid level to rise the suspension carrier and take place the overflow and reveal the condition, and lead to the interception screen cloth to cross water smoothly mainly has two reasons, firstly the fibre hair blocks up the screen cloth, secondly the suspension carrier is piled up out at the screen cloth, and its inherent reason all is that the fluidization effect of suspension carrier is poor, and the screen cloth crosses well under good fluidization prerequisite, the condition that the liquid level rises can not appear, then can't trigger the warning if take place the screen cloth damage and lead to the suspension carrier to reveal this moment. In addition, the liquid level of the aerobic MBBR pool affected by aeration is in a constantly changing state, accurate determination is difficult to realize, a liquid level change signal is obvious when the obvious liquid level rises, an accident is easy to happen at the moment, and therefore the judgment node given by the liquid level meter also has delay.
It can be seen that the above-mentioned prior art packing monitoring system is still further improved.
Disclosure of Invention
The invention aims to provide an automatic judgment method for MBBR (moving bed biofilm reactor) process suspension carrier leakage, which can more quickly, accurately and comprehensively realize timely automatic identification of the MBBR process suspension carrier leakage.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic judgment method for leakage of a MBBR (moving bed biofilm reactor) process suspension carrier sequentially comprises the following steps:
step one, installing a required system on a water outlet pipeline of an MBBR (moving bed biofilm reactor) process
The required system comprises an automatic control system, a main water inlet pipe and a main water outlet pipe, wherein the main water inlet pipe is connected to the tail end of a water outlet pipeline of the MBBR process, the tail end of the main water inlet pipe is connected with a first branch pipe and a second branch pipe which are designed in parallel, and connecting pipes for keeping the first branch pipe and the second branch pipe communicated are respectively arranged at two ends of the first branch pipe and the second branch pipe;
an intercepting screen system is arranged in the middle of the first branch pipe and comprises an intercepting screen and a scraper; when the intercepting screen is upwards extracted, the intercepting screen is just contacted with the scraper; a first valve and a second valve are respectively arranged on the first branch pipes in front of and behind the intercepting screen;
a first pressure gauge is arranged on a first branch pipe between the interception screen and the first valve, and a second pressure gauge is arranged on a second branch pipe opposite to the first pressure gauge; a third pressure gauge is arranged at the end of the main water outlet pipe;
the automatic control system is used for acquiring and identifying signals of the first pressure gauge, the second pressure gauge and the third pressure gauge, judging according to the acquired signal values and sending out an alarm signal;
step two, during the operation period after the system is installed, the ratio of the average value of the readings of the first pressure gauge and the second pressure gauge in a certain period of time is A; when the system initially runs normally, the ratio A of the average value of the readings of the first pressure gauge and the second pressure gauge in a certain period of time is A 0 ；
Step three, along with the operation of the system, when A is reduced to 0.5A 0 Time, recording time period is T 0 At the moment, 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 four, closing the first valve and the second valve, and cleaning the flock blockage at the interception screen by extracting the interception screen;
after the cleaning in the fifth step and the fourth step is finished, opening the first valve and the second valve, continuing the system to operate, and when A is detected to be less than 0.85A 0 When the step four is needed, repeating the step four; when A is detected to be more than or equal to 0.85A 0 When the cleaning is finished, the reading of the first pressure gauge is approximately equal to the reading of the second pressure gauge and is larger than the reading of the third pressure gauge;
step six, opening the first valve and the second valve, continuing to operate the system, and when A is reduced to 0.5A again 0 Time, record time period T 1 When the reading of the first pressure gauge is less than the reading of the third pressure gauge, the reading of the second pressure gauge is less than the reading of the third pressure gauge; at the moment, the blocking condition of the intercepting screen is judged firstly, and then cleaning is carried out, wherein the judging steps are as follows in sequence:
a. when the reading of first manometer < the reading of third manometer, judge that the interception screen cloth has blocking phenomenon, judge that this moment belongs to which kind of reason and leads to the interception screen cloth to block up:
a 1 when T is 1 ≤0.2T 0 Judging that the screen is blocked due to leakage of the suspended carrier;
a 2 when T is 1 ≥0.5T 0 Judging that the screen is blocked due to the flock;
a 3 when 0.2T 0 ＜T 1 ＜0.5T 0 Judging that the screen is blocked due to the leakage of the suspended carrier;
when the above step a occurs 1 、a 2 、a 3 And (4) further checking whether the suspended carrier is accumulated at the observation port to confirm whether the suspended carrier leaks from the suspended carrier, and executing the step four.
The beneficial technical effects directly brought by the technical scheme are as follows:
the system is arranged at the tail end of the MBBR process water outlet pipeline, and the leakage of the MBBR process suspension carrier can be timely, quickly and automatically judged. Specifically, the system comprises a first branch pipe and a second branch pipe which are arranged in parallel, an interception screen mesh system, a first valve, a second valve and a first pressure gauge are arranged on the first branch pipe, a second pressure gauge is arranged on the second branch pipe, the blocking condition of the interception screen mesh can be rapidly judged through the average value of the readings of the first pressure gauge and the second pressure gauge in a certain time period, and then the blocking condition is judged according to a relevant parameter T 1 And T 0 It is further possible to determine what causes the clogging of the intercepting screen.
As a preferable scheme of the present invention, the first branch pipe at the front end of the intercepting screen is provided with a viewing port, and the viewing port is connected with the first branch pipe through a flange.
As another preferred scheme of the invention, the interception screen is designed in an extraction mode; the two scraping plates are respectively positioned at two sides of the intercepting screen and connected with the first branch pipe.
Preferably, the first pressure gauge, the second pressure gauge and the third pressure gauge have a pressure signal transmission function and can transmit pressure signals to the automatic control system in real time.
Preferably, when T is 1 ≤0.2T 0 When the floating carrier leakage alarm signal is sent out, the automatic control system judges that the screen is blocked due to the leakage of the floating carrier;
when T is 1 ≥0.5T 0 The automatic control system judges that the screen is blocked due to the flock and sends a cleaning alarm signal;
when 0.2T 0 ＜T 1 ＜0.5T 0 And when the floating carrier leakage occurs, the automatic control system judges that the screen is blocked due to the fact that the floating carrier leakage possibly occurs and sends out a floating carrier leakage early warning signal.
Preferably, the diameter of the opening of the intercepting screen is 40-80% of the diameter of the suspended carrier, and the opening rate on the intercepting screen is more than 40%.
Preferably, the end of the intercepting screen adjacent to the viewing port is less than 10cm from the intercepting screen.
Preferably, the distance between the first pressure gauge and the first valve is greater than twice the pipe diameter of the first branch pipe, and the distance between the third pressure gauge and the connecting pipes of the first branch pipe and the second branch pipe is greater than twice the pipe diameter of the total water outlet pipe.
Preferably, the distance between the upstream surface of the intercepting system and the connecting pipe of the first branch pipe and the second branch pipe is more than three times of the pipe diameter of the first branch pipe.
Preferably, the pipe diameters of the first branch pipe and the second branch pipe are 70-120% of the total inlet pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) The method for automatically judging the leakage of the suspended carrier in the MBBR process can be used for quickly judging whether the suspended carrier leaks in the MBBR process in time, and core equipment is a pressure gauge, so that the method is more economical than equipment such as a liquid level meter and a flow meter.
(2) The condition of leakage of the suspension carrier is indirectly reflected through the pressure change of the pressure meter outside the pipeline, and whether the suspension carrier is leaked or not can be judged without dismounting the pipeline, so that the device is convenient and fast.
(3) Whether the suspended carrier is leaked or not is judged through pressure change of the pressure gauge, and compared with a liquid level meter and a manual inspection mode, the accuracy is higher, and data are more reliable and stable.
(4) Through setting up parallelly connected first branch pipe and second branch pipe, avoided overflowing the risk because of the front end that interception screen cloth blockked up and cause.
(5) The intercepting screen is designed in an extraction mode, and scrapers are arranged on two sides of the intercepting screen, so that the simple cleaning of the flock blockage can be realized.
(6) The system can be combined with an automatic control system to realize automatic judgment, manual inspection is not needed, and labor input is saved; in conclusion, the method for automatically judging the leakage of the MBBR process suspension carrier can realize the timely and automatic identification of the leakage of the MBBR process suspension carrier, and is convenient to install and simple to operate.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a flow chart of an automatic determination method for MBBR process floating carrier leakage according to the present invention;
FIG. 2 is a view of the construction of the interception screen of the present invention;
FIG. 3 is a schematic view of a view port according to the present invention;
in the figure: 1. the device comprises a first valve, a second valve, a first intercepting screen system, a second intercepting screen system, a viewing port, a first branch pipe, a second branch pipe, a first pressure gauge, a second pressure gauge, a third pressure gauge and a P1.
Detailed Description
The invention provides an automatic judgment method for MBBR process suspension carrier leakage, and in order to make the advantages and technical scheme of the invention clearer and clearer, the invention is further explained by combining with specific embodiments.
As shown in figure 1, the system required by the invention comprises a main water inlet pipe, a main water outlet pipe, a first valve 1, a second valve 2, an interception screen mesh system 3, a first branch pipe 5 and a second branch pipe 6, wherein 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, the first branch pipe and the second branch pipe are kept communicated through the connecting pipes, and the first branch pipe, the connecting pipes and the second branch pipe are in a 'return' shape integrally.
The tail end of the water outlet pipeline of the MBBR technology is connected to the total water inlet pipe, the tail end of the total water inlet pipe is connected with the first branch pipe and the second branch pipe, and the diameters of the total water inlet pipe and the total water outlet pipe are the same as those of the first branch pipe and the second branch pipe.
As shown in fig. 2, an intercepting screen system 3 is provided in the middle of the first branch pipe, and the intercepting screen system 3 includes an intercepting screen and a scraper; when the interception screen is upwards extracted, the interception screen just contacts with the scraper; the preferred interception screen cloth chooses the design of extraction formula for use, conveniently clears up it, in addition, in order to wash the plug on the interception screen cloth, consequently preferably sets up the scraper blade in the both sides of interception screen cloth, works as the upward formula of drawing of interception screen cloth, and it passes through contact friction with the scraper blade, can realize wasing fast to the plug.
The scrapers are arranged on two sides of the top end of the intercepting screen, and the two sides of the scrapers are tightly attached to the intercepting screen, so that the intercepting screen is convenient to clean. The intercepting screen comprises an intercepting screen body and a plurality of regularly arranged holes positioned on the intercepting screen body, and in order to better prevent the leakage of the suspended carriers, the diameter of each hole is 40-80% of the diameter of the suspended carriers, and the opening rate of the intercepting screen is more than 40%. An observation port is arranged on the first branch pipe at the front end of the intercepting screen, and the observation port is connected with the first branch pipe through a flange.
A first valve and a second valve are respectively arranged on the first branch pipes in front of and behind the interception screen;
a first pressure gauge is arranged on a first branch pipe between the interception screen and the first valve, and a second pressure gauge is arranged on a second branch pipe opposite to the first pressure gauge; the total outlet pipe end be provided with the third manometer, the distance between first manometer and the first valve should be greater than twice first branch pipe diameter, the distance of third manometer and first branch pipe and second branch pipe connecting pipe should be greater than twice total outlet pipe diameter, prevent that the vortex from influencing the pressure measurement accuracy.
The pipe diameters of the first branch pipe and the second branch pipe are 70% -120% of the total water inlet pipe, and inaccurate pressure measurement caused by too high or too low flow speed is prevented.
The first valve and the second valve can be selected to automatically open and close the valves, so that the system is more convenient to control.
The distance between one end of the observation port close to the interception screen and the interception screen is less than 10cm, so that the suspended carrier can be observed conveniently.
The distance between the upstream surface of the intercepting system and the connecting pipe of the first branch pipe and the second branch pipe is more than three times of the pipe diameter of the first branch pipe, so that the leaked suspended carriers are prevented from directly flowing away from the second branch pipe due to the vortex action. In addition, in order to facilitate the overall control of the system, an automatic control system matched with the system can be designed, and the automatic control system can receive the pressure signal value transmitted by the pressure gauge in real time, carry out calculation and judgment and give out different alarm signals.
The system is used for rapidly judging the leakage of the MBBR process suspension carrier, and is particularly arranged at the tail end of an MBBR process outlet pipe, and the leakage identification method comprises the following steps:
1. assuming that the ratio of the average value of the readings of the first pressure gauge and the second pressure gauge in a certain period of time is A during the operation of the system after installation; assuming that the system initially operates normally, the ratio of the average value of the readings of the first pressure gauge and the second pressure gauge in a certain period of time is A 0 ；
2. When A is reduced to 0.5A along with the operation of the system 0 In the meantime, the interception screen is considered to be blocked by 50%, and at this time, the interception screen is more easily blocked than when the interception screen normally runs, so that the recording time period is T 0 As a cleaning cycle judgment condition for normal operation, at this time, the reading of the first pressure gauge P1 is less than the reading of the third pressure gauge P3 is less than the reading of the second pressure gauge P2;
3. closing the first valve and the second valve, and cleaning the blockage at the interception screen by extracting the interception screen;
4. after the cleaning in the fourth step is finished, the first valve and the second valve are opened, the system continues to operate, and when A is detected to be less than 0.85A 0 When the step four is needed, repeating the step four; when A is detected to be more than or equal to 0.85A 0 When the cleaning is finished, the reading of the first pressure gauge is approximately equal to the reading of the second pressure gauge and is larger than the reading of the third pressure gauge;
5. the first valve and the second valve are opened, the system continues to operate, and when A is reduced to 0.5A again 0 Time, record time period T 1 At the moment, 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 the moment, the blocking condition of the intercepting screen is judged firstly, and then cleaning is carried out, wherein the judging steps are as follows in sequence:
a. when the reading of first manometer < the reading of third manometer, judge that the interception screen cloth has blocking phenomenon, judge that this moment belongs to which kind of reason and leads to the interception screen cloth to block up:
a 1 when T is 1 ≤0.2T 0 When the floating carrier is leaked, the automatic control system judges that the screen is blocked due to the leakage of the floating carrier and sends a leakage alarm signal;
a 2 when T is 1 ≥0.5T 0 The automatic control system judges that the screen is blocked due to the flock and sends a cleaning alarm signal;
a 3 when 0.2T 0 ＜T 1 ＜0.5T 0 And when the floating carrier leakage occurs, the automatic control system judges that the screen is blocked due to the leakage of the floating carrier and sends out a floating carrier leakage early warning signal.
When the above step a occurs 3 And (5) further checking whether the suspended carrier leaks from the observation port or not according to the judgment result, and executing the step four.
The present invention will be described in detail with reference to specific examples.
Example 1:
the biochemical process of a certain sewage plant adopts the MBBR technology, the system is arranged on a water outlet pipeline, during the initial normal operation period after the installation, the index ratio A of a first pressure gauge P1 to a second pressure gauge P2 is 0.91-0.95, the average value is 0.93, and the record A is recorded 0 =0.93. After 19 days of normal operation, record T 0 =19, the number ratio A of the first pressure gauge P1 to the second pressure gauge P2 is reduced to 0.45 < 0.5A 0 The automatic control system sends out an interception screen cleaning alarm, the interception screen is cleaned by pulling the interception screen at the moment, A is recovered to 0.91-0.93 after cleaning, and the average value is more than 0.92 and more than 0.85A 0 And the alarm is released and the operation is recovered. During normal operation, after 8 days of cleaning the screen a was reduced to 0.4 and T was recorded 1 =8, then 0.2T 0 ＜T 1 ＜0.5T 0 And the automatic control system sends out a leakage early warning alarm, further checks the observation port, finds that a small amount of suspended carriers are accumulated, immediately inspects the observation port, finds the leakage point of the interception screen, and timely maintains the interception screen without causing further leakage.
Example 2:
a sewage plant adopts an MBBR process, and the system is arranged on an MBBR water outlet pipelineThe ratio A of the readings of the first pressure gauge P1 and the second pressure gauge P2 is 0.93-0.97 during the normal operation after the installation, the average value is 0.95, and A is recorded 0 =0.95. After 33 days of normal operation, A is reduced to 0.47 < 0.5A 0 The intercepting screen cleaning alarm sent by the automatic control system is cleaned through the extraction intercepting screen, A is recovered to 0.71-0.76 after cleaning, and the average value is 0.73-0.85A 0 And the A is restored to 0.89-0.93 after the second cleaning, and the average value is more than 0.92 and more than 0.85A 0 And the alarm is released and the operation is recovered. Within 1h (T) for a certain time 1 ) The A is rapidly reduced to 0.45 < 0.5A 0 ，T 1 ＜0.2T 0 And the system sends out a leakage alarm signal of the suspended carrier, field personnel quickly look up the observation port to find the accumulation phenomenon of the suspended carrier, and the front-end screen is timely maintained to prevent large-scale leakage.
The parts which are not described in the invention can be realized by taking the prior art as reference.
It should be understood that the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. An automatic judgment method for MBBR (moving bed biofilm reactor) process suspension carrier leakage is characterized by sequentially comprising the following steps of:
step one, installing a required system on a water outlet pipeline of an MBBR (moving bed biofilm reactor) process
The required system comprises an automatic control system, a main water inlet pipe and a main water outlet pipe, wherein the main water inlet pipe is connected to the tail end of a water outlet pipeline of the MBBR process, the tail end of the main water inlet pipe is connected with a first branch pipe and a second branch pipe which are designed in parallel, and connecting pipes for keeping the first branch pipe and the second branch pipe communicated are respectively arranged at two ends of the first branch pipe and the second branch pipe;
an intercepting screen system is arranged in the middle of the first branch pipe and comprises an intercepting screen and a scraper; when the interception screen is extracted upwards, the interception screen just contacts the scraper; a first valve and a second valve are respectively arranged on the first branch pipes in front of and behind the intercepting screen;
a first pressure gauge is arranged on a first branch pipe between the interception screen and the first valve, and a second pressure gauge is arranged on a second branch pipe opposite to the first pressure gauge; a third pressure gauge is arranged at the end of the main water outlet pipe;
the automatic control system is used for acquiring and identifying signals of the first pressure gauge, the second pressure gauge and the third pressure gauge, judging according to the acquired signal values and sending out an alarm signal;
step two, assuming that the ratio of the average value of the readings of the first pressure gauge and the second pressure gauge in a certain period of time is A during the operation period after the system is installed; assuming that the system initially operates normally, the ratio of the average value of the readings of the first pressure gauge and the second pressure gauge in a certain period of time is A 0 ；
Step three, along with the operation of the system, when A is reduced to 0.5A 0 Time, recording time period is T 0 At the moment, 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 four, closing the first valve and the second valve, and cleaning the blockage at the interception screen mesh by extracting the interception screen mesh;
after the cleaning in the fifth step and the fourth step is finished, opening the first valve and the second valve, continuing the operation of the system, and when A is detected to be less than 0.85A 0 When the step four is needed, repeating the step four; when A is detected to be more than or equal to 0.85A 0 When the cleaning is finished, the reading of the first pressure gauge is approximately equal to the reading of the second pressure gauge and is larger than the reading of the third pressure gauge;
step six, opening the first valve and the second valve, continuing to operate the system, and when A is reduced to 0.5A again 0 Time, record time period T 1 When the reading of the first pressure gauge is less than the reading of the third pressure gauge, the reading of the second pressure gauge is less than the reading of the third pressure gauge; at the moment, the blocking condition of the intercepting screen is judged firstly, and then cleaning is carried out, wherein the judging steps are as follows in sequence:
a. when the reading of first manometer < the reading of third manometer, judge that the interception screen cloth has blocking phenomenon, judge this moment and belong to which kind of reason and lead to the interception screen cloth to block up:
a 1 when T is 1 ≤0.2T 0 Judging that the screen is blocked due to leakage of the suspended carrier;
a 2 when T is 1 ≥0.5T 0 Judging that the screen is blocked due to the flock;
a 3 when 0.2T 0 ＜T 1 ＜0.5T 0 Judging that the screen is blocked due to the leakage of the suspended carrier;
when the above step a occurs 3 And (4) further checking whether the suspended carrier is accumulated at the observation port to confirm whether the suspended carrier leaks from the suspended carrier, and executing the step four.
2. The method of claim 1, wherein the method comprises the following steps: the first branch pipe at the front end of the intercepting screen is provided with an observation port, and the observation port is connected with the first branch pipe through a flange.
3. The method according to claim 1, wherein the method comprises the following steps: the interception screen is designed in an extraction mode; the two scraping plates are respectively positioned on two sides of the intercepting screen and connected with the first branch pipe.
4. The method of claim 1, wherein the method comprises the following steps: the first pressure gauge, the second pressure gauge and the third pressure gauge have a pressure signal transmission function and can transmit pressure signals to the automatic control system in real time.
5. The method as claimed in claim 4, wherein the method comprises the following steps:
when T is 1 ≤0.2T 0 Time, automatic control system judgesThe leakage of the suspended carrier causes the blockage of the screen and sends out a leakage alarm signal of the suspended carrier;
when T is 1 ≥0.5T 0 When the filter screen is in use, the automatic control system judges that the filter screen is blocked due to the flock and sends out a filter screen cleaning alarm signal;
when 0.2T 0 ＜T 1 ＜0.5T 0 When the system is used, the automatic control system judges that the screen is blocked due to the leakage of the suspended carrier possibly; and sends out a leakage early warning signal.
6. The method of claim 1, wherein the method comprises the following steps: the diameter of the opening of the interception screen is 40-80% of the diameter of the suspended carrier, and the opening rate on the interception screen is more than 40%.
7. The method of claim 2, wherein the method comprises the following steps: the distance between one end of the observation port close to the interception screen mesh and the interception screen mesh is less than 10cm.
8. The method of claim 1, wherein the method comprises the following steps: the distance between the first pressure gauge and the first valve is larger than two times of the pipe diameter of the first branch pipe, and the distance between the third pressure gauge and the connecting pipe of the first branch pipe and the second branch pipe is larger than two times of the pipe diameter of the total water outlet pipe.
9. The method of claim 1, wherein the method comprises the following steps: the distance between the upstream surface of the interception screen mesh system and the first branch pipe and the distance between the upstream surface of the interception screen mesh system and the second branch pipe connecting pipe are larger than three times of the pipe diameter of the first branch pipe.
10. The method of claim 1, wherein the method comprises the following steps: the pipe diameters of the first branch pipe and the second branch pipe are 70% -120% of the pipe diameter of the total water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211537967.4A CN115814502A (en) | 2022-12-01 | 2022-12-01 | Automatic judgment method for leakage of MBBR (moving bed biofilm reactor) process suspension carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211537967.4A CN115814502A (en) | 2022-12-01 | 2022-12-01 | Automatic judgment method for leakage of MBBR (moving bed biofilm reactor) process suspension carrier |
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| CN115814502A true CN115814502A (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211537967.4A Pending CN115814502A (en) | 2022-12-01 | 2022-12-01 | Automatic judgment method for leakage of MBBR (moving bed biofilm reactor) process suspension carrier |
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| CN (1) | CN115814502A (en) |
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2022
- 2022-12-01 CN CN202211537967.4A patent/CN115814502A/en active Pending
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