An aeration intelligent adjusting device for preventing sulfur paste precipitation

Abstract

The present application relates to the technical fields of industrial desulfurization, and especially relates to an aeration intelligent adjusting device for preventing sulfur paste precipitation, which comprises an aeration tank, an aeration unit arranged in the aeration tank and comprising a main aeration pipe and a plurality of branch aeration pipes, a backwashing unit arranged at the lower part of the branch aeration pipes in the aeration tank and comprising a backwashing pipe, a monitoring unit comprising a first hydrogen sulfide sensor, a second hydrogen sulfide sensor and a turbidity sensor arranged on the upper, middle and lower parts of the side wall in the aeration tank respectively, and an ultrasonic sensor arranged at the center of the bottom of the aeration tank for monitoring the hydrogen sulfide concentration, the suspended concentration of sulfur paste particles and the deposition thickness of sulfur paste in different areas in the aeration tank in real time, and a control module connected with the aeration unit, the backwashing unit and the monitoring unit respectively. The present application improves the performance of preventing sulfur paste precipitation and the operation efficiency of the aeration device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial desulfurization, and in particular to an aeration intelligent adjusting device for preventing sulfur paste precipitation. BACKGROUND

[0002] In the process of energy exploitation and transportation of oil, natural gas, etc., the presence of hydrogen sulfide (H2S) and other acid gases is easy to react with metal pipelines and equipment to generate corrosion products such as iron sulfide, and then form "sulfur paste" precipitation. Such precipitation not only blocks the pipelines, valves and filtering equipment, reduces the transportation efficiency, but also may exacerbate local corrosion, threatening the production safety. At present, chemical inhibitors or mechanical cleaning means are commonly used in industry to deal with the problem of sulfur paste, but there are limitations of high cost, poor environmental protection and inability to respond to working condition changes in real time.

[0003] Aeration technology can promote the oxidation and decomposition of H2S by injecting air or oxygen into the fluid, thereby inhibiting the generation of sulfur paste. However, the traditional aeration system mostly runs with fixed parameters, which is difficult to adapt to the dynamic changes of fluid flow, H2S concentration, temperature, etc., leading to insufficient aeration (poor sulfur prevention effect) or excessive aeration (waste of energy consumption and possible secondary oxidation corrosion). In addition, the generation of sulfur paste precipitation has nonlinear characteristics, and the effect of conventional PID control strategy is limited. Therefore, there is an urgent need for a device that can monitor the working condition in real time and intelligently adjust the aeration amount, in order to optimize the sulfur prevention efficiency and reduce the operating cost, and meet the upgrading needs of intelligent oilfields and pipe networks.

[0004] Chinese Patent Publication No. CN102092837B discloses an aeration device for oxidizing desulfurization waste liquid, which comprises an aeration oxidation tank, an oxidation fan and an aeration pipeline. The oxidation fan has an upper oxidation fan and a lower oxidation fan. The upper fan corresponds to the upper aeration pipeline, and the outlet pipeline is designed as an aeration pipeline with small aperture and arranged in the upper layer of the aeration oxidation tank. The lower fan corresponds to the lower aeration pipeline, and the outlet pipeline is designed as an aeration pipeline with slightly larger aperture and arranged in the lower layer of the aeration oxidation tank. The outlet pipelines of the two oxidation fans are connected and provided with a switching valve.

[0005] However, the prior art has the following problems: the prior art does not consider real-time monitoring and dynamic control of the generation of sulfur paste during the aeration process, which affects the uniform distribution and timely removal of sulfur paste, leading to the accumulation of sulfur paste in the tank, the decrease of reaction efficiency, and the problem of irregular manual cleaning of intermediate processes, which not only increases the time and labor of cleaning work, but also may cause equipment blockage or pumping system failure due to untimely cleaning. SUMMARY

[0006] To this end, the present application provides an aeration intelligent adjustment device for preventing sulfur paste precipitation, which is used to overcome the problem that sulfur paste accumulates in the tank to cause pumping system failure due to the lack of real-time monitoring and dynamic control of the sulfur paste generation in the aeration process in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides an aeration intelligent adjustment device for preventing sulfur paste precipitation, comprising:

[0008] An aeration tank, the bottom of which is a conical structure;

[0009] An aeration unit, which is arranged inside the aeration tank and comprises an aeration main pipe and a plurality of aeration branch pipes, is used to uniformly introduce oxygen into the sulfur-containing liquid to promote the oxidation and decomposition of hydrogen sulfide;

[0010] A backwashing unit, which is arranged at the lower part of the aeration branch pipe inside the aeration tank, comprises a backwashing pipe, and is used to periodically backwash the sulfur paste deposited at the bottom of the aeration tank;

[0011] A monitoring unit, which comprises a first hydrogen sulfide sensor, a second hydrogen sulfide sensor and a turbidity sensor arranged respectively at the upper, middle and lower parts of the side wall inside the aeration tank, and an ultrasonic sensor arranged at the center of the bottom of the aeration tank, is used to monitor the hydrogen sulfide concentration, the suspended concentration of sulfur paste particles and the deposition thickness of sulfur paste in different regions inside the aeration tank in real time, and obtain the turbidity change rate and the concentration gradient index of hydrogen sulfide;

[0012] A control module, which is connected with the aeration unit, the backwashing unit and the monitoring unit respectively, is used to determine the eligibility of the aeration process according to the turbidity change rate within the preset aeration time, to determine the eligibility of the aeration process again according to the concentration gradient index of hydrogen sulfide under the condition that the aeration process is not eligible, to increase the aeration amount under the condition that the secondary determination is not eligible, to determine when to start backwashing according to the deposition thickness of sulfur paste, and to determine the eligibility of backwashing based on the turbidity drop rate after a single backwashing under the condition that the backwashing is not eligible, and to increase the backwashing time under the condition that the backwashing is not eligible.

[0013] Further, the gas inlet of the aeration main pipe is arranged at the top of the first side wall of the aeration tank, and the aeration main pipe comprises an L-shaped pipe and an inverted T-shaped pipe in sequence from the gas inlet to the gas outlet, wherein the vertical pipe openings of the L-shaped pipe and the inverted T-shaped pipe are connected by a first flange.

[0014] Further, a plurality of aeration branch pipes are arranged horizontally at equal intervals on both sides of the horizontal pipe of the inverted T-shaped pipe.

[0015] Further, the second gas inlet of the backwashing pipe is arranged at the bottom of the second side wall of the aeration tank, and the opening direction of the backwashing pipe is opposite to the slopes on both sides of the bottom of the aeration tank.

[0016] Further, the control module determines the qualification of the aeration process according to the turbidity change rate under the preset time length, wherein,

[0017] If the turbidity change rate is less than a first preset change rate, it is determined that the aeration process is unqualified, and the aeration amount is increased according to the difference between the first preset change rate and the turbidity change rate;

[0018] If the turbidity change rate is greater than or equal to the first preset change rate and less than a second preset change rate, it is determined that the aeration process is unqualified, and the qualification of the aeration process is determined again according to the concentration gradient index of hydrogen sulfide;

[0019] If the turbidity change rate is greater than or equal to the second preset change rate, it is determined that the aeration process is qualified.

[0020] Further, the aeration amount is positively correlated with the change rate difference, and the change rate difference is the difference between the first preset change rate and the turbidity change rate.

[0021] Further, the qualification of the aeration process is determined again according to the concentration gradient index of hydrogen sulfide, wherein,

[0022] If the concentration gradient index is less than a preset concentration gradient index, it is determined that the aeration process is unqualified again, and the aeration amount is increased according to the difference between the preset concentration gradient index and the concentration gradient index;

[0023] If the concentration gradient index is greater than or equal to the preset concentration gradient index, it is determined that the aeration process is qualified.

[0024] Further, the control module determines to start backwashing when the thickness of sulfur paste deposition is greater than or equal to a preset deposition thickness.

[0025] Further, the qualification of the backwashing is determined based on the turbidity drop rate after a single start of backwashing, wherein,

[0026] If the turbidity drop rate is less than a preset drop rate, it is determined that the backwashing is qualified;

[0027] If the turbidity drop rate is greater than or equal to the preset drop rate, it is determined that the backwashing is unqualified, and the backwashing time is increased according to the difference between the turbidity drop rate and the preset drop rate.

[0028] Further, there are several adjustment modes for the backwashing time, and each adjustment mode has a different adjustment range for the backwashing time.

[0029] Compared with the prior art, the beneficial effects of the present application are that, by arranging the monitoring unit, the present application can obtain the key parameters such as the hydrogen sulfide concentration, the suspended concentration of sulfur paste particles and the sulfur paste deposition thickness in different areas inside the aeration tank in real time, and obtain the turbidity change rate and the concentration gradient index of hydrogen sulfide accordingly. The control module dynamically regulates the aeration process and the backwashing process based on these data, effectively avoids the problem that sulfur paste accumulates in the tank due to lack of real-time monitoring and regulation, thereby causing the pumping system to fail, and improves the operation stability and reliability of the entire system, reduces the equipment maintenance cost and downtime.

[0030] Further, the monitoring unit and the control module of the present application work together to double-determine the aeration process according to the turbidity change rate and the concentration gradient index of hydrogen sulfide within a preset time period. When the aeration is unqualified, the aeration amount can be accurately increased according to the specific difference to ensure that the hydrogen sulfide can be fully oxidized and decomposed, improve the aeration efficiency, effectively control the hydrogen sulfide content in the sulfur-containing liquid, and optimize the entire aeration treatment effect, providing better liquid conditions for subsequent processes.

[0031] Further, the present application monitors the sulfur paste deposition thickness in real time through the ultrasonic sensor, and the control module can start backwashing in time when the sulfur paste deposition reaches the preset thickness. At the same time, the backwashing effect is determined based on the turbidity drop rate after single backwashing, and the backwashing time can be flexibly increased according to the difference when unqualified, and multiple adjustment modes are set to meet different working condition requirements. Through this precise backwashing control mechanism, the excessive deposition of sulfur paste at the bottom of the aeration tank is effectively prevented, the quality of backwashing is ensured, and the normal operation of the aeration device is further maintained.

[0032] Further, the present application integrates multiple sensors and intelligent control modules to realize automatic monitoring and dynamic regulation of the aeration process. Without frequent manual intervention, the device can automatically adjust parameters such as aeration amount and backwashing time according to real-time data, improve the intelligent level of the device, reduce the operation difficulty and labor cost, and make the entire treatment process more efficient, convenient and accurate. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 It is a front view of the aeration intelligent adjustment device for preventing sulfur paste deposition according to the embodiment of the present application;

[0034] Fig. 2 It is a side view of the aeration intelligent adjustment device for preventing sulfur paste deposition according to the embodiment of the present application;

[0035] Fig. 3 It is a distribution diagram of the aeration branch pipe according to the embodiment of the present application;

[0036] Fig. 4 It is a cross-sectional view of the backwashing pipe according to the embodiment of the present application;

[0037] Figure: 1, aeration tank; 2, aeration main pipe; 3, air inlet; 4, aeration branch pipe; 5, leg; 6, partition; 7, backwashing pipe; 8, first flange; 9, square pipe; 10, second air inlet; 11, sulfur paste discharge port. DETAILED DESCRIPTION

[0038] In order to make the objects and advantages of the present application more clear, the present application is further described below in conjunction with examples; it should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0039] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0040] It should be pointed out that the data in the present example are obtained by comprehensive analysis and evaluation of historical detection data and corresponding historical detection results in the three months before the present detection by the present application. Those skilled in the art can understand that the determination method of the present application for a single parameter can be to select the value with the highest proportion as the preset standard parameter according to the data distribution, to use weighted summation to obtain the value as the preset standard parameter, to substitute each historical data into a specific formula and to obtain the value as the preset standard parameter using the formula, or other selection methods, as long as the present application can clearly define different specific situations in the single determination process by the obtained value.

[0041] Please refer to Figs. 1 to 4 Fig. 1 is a front view of the aeration intelligent adjusting device for preventing sulfur paste precipitation according to the present application; Fig. 2 is a side view of the aeration intelligent adjusting device for preventing sulfur paste precipitation according to the present application; Fig. 3 is a distribution diagram of the aeration branch pipe according to the present application; and Fig. 4 is a cross-sectional view of the backwashing pipe according to the present application.

[0042] The aeration intelligent adjusting device for preventing sulfur paste precipitation according to the present application comprises:

[0043] The aeration tank 1 has a conical structure at the bottom, which is convenient for collecting and discharging the sulfur paste;

[0044] The aeration unit is arranged inside the aeration tank 1 and comprises the aeration main pipe 2 and a plurality of aeration branch pipes 4, which are used to uniformly introduce oxygen into the sulfur-containing liquid to promote the oxidation and decomposition of hydrogen sulfide;

[0045] The backwashing unit is arranged at the lower part of the aeration branch pipe 4 inside the aeration tank 1 and comprises the backwashing pipe 7, which is used to periodically backwash the sulfur paste deposited at the bottom of the aeration tank 1;

[0046] A monitoring unit, which comprises a first hydrogen sulfide sensor, a second hydrogen sulfide sensor and a turbidity sensor respectively arranged on the upper, middle and lower parts of the inner side wall of the aeration tank 1, and an ultrasonic sensor arranged at the center of the bottom of the aeration tank 1, for monitoring the hydrogen sulfide concentration, the suspended concentration of sulfur paste particles and the deposition thickness of sulfur paste in different areas of the aeration tank 1 in real time, and obtaining the turbidity change rate and the concentration gradient index of hydrogen sulfide;

[0047] A control module connected with the aeration unit, the backwashing unit and the monitoring unit, for determining the qualification of the aeration process according to the turbidity change rate within the preset aeration time, under the condition that the aeration process is unqualified, determining the qualification of the aeration process again according to the concentration gradient index of hydrogen sulfide, under the condition that the secondary determination is unqualified, increasing the aeration amount, determining when to start backwashing according to the deposition thickness of sulfur paste, and determining the qualification of backwashing based on the turbidity drop rate after single backwashing, and increasing the backwashing time under the condition that the backwashing is unqualified.

[0048] Specifically, the aeration tank 1 is provided with four legs 5 at the four corners of the bottom, for ensuring balanced force and preventing tilting or deformation caused by uneven weight distribution.

[0049] Specifically, a circle of square tubes 9 is arranged in the middle of the aeration tank 1, for reinforcing the frame structure of the aeration tank 1, improving the overall mechanical strength, and preventing the tank body from being deformed due to liquid pressure or external load.

[0050] Specifically, a vertical partition plate 6 is further arranged in the aeration tank 1, the partition plate 6 is parallel to the second side wall, the top of the partition plate 6 is connected with the top surface of the aeration tank 1, and the bottom of the partition plate 6 is located at the lower part of the aeration branch pipe 4, for dividing the airflow channel, ensuring uniform distribution of oxygen in the liquid, and avoiding short flow or dead zone.

[0051] Specifically, the air inlet 3 of the aeration main pipe 2 and the second air inlet 10 of the backwashing pipe 7 are respectively connected with a Roots blower, and an electric regulating valve is arranged between the Roots blower and the aeration main pipe 2 and the backwashing pipe 7, for controlling the aeration amount and the backwashing time.

[0052] Specifically, a sulfur paste discharge port 11 is arranged below the second air inlet 10.

[0053] Specifically, the air inlet 3 of the aeration main pipe 2 is arranged at the top of the first side wall of the aeration tank 1, and the aeration main pipe 2 comprises an L-shaped pipe and an inverted T-shaped pipe in sequence from the air inlet 3 to the air outlet, wherein the vertical pipe openings of the L-shaped pipe and the inverted T-shaped pipe are connected through a first flange 8.

[0054] Specifically, several aeration branch pipes 4 are arranged equidistantly and horizontally on both sides of the horizontal pipe of the inverted T-shaped pipe, and in the embodiment of the present application, the spacing of the aeration branch pipes 4 is 300 mm.

[0055] Specifically, the second air inlet 10 of the backwashing pipe 7 is arranged at the bottom of the second side wall of the aeration tank 1, and the opening direction of the backwashing pipe 7 is opposite to the slopes on both sides of the bottom of the aeration tank 1. In this way, the backwashing airflow can impact the sulfur paste deposited at the bottom of the aeration tank 1 from the bottom to the top, so that the cleaning efficiency of backwashing can be improved.

[0056] In the embodiment of the present application, the included angle between the openings on both sides of the backwashing pipe 7 is 120°, and the size of the single opening is 10 mm.

[0057] Specifically, the control module determines the qualification of the aeration process according to the turbidity change rate under the preset time length, wherein,

[0058] If the turbidity change rate is less than the first preset change rate, it is determined that the aeration process is unqualified, and the aeration amount is increased according to the difference between the first preset change rate and the turbidity change rate;

[0059] If the turbidity change rate is greater than or equal to the first preset change rate and less than the second preset change rate, it is determined that the aeration process is unqualified, and the qualification of the aeration process is determined again according to the concentration gradient index of hydrogen sulfide;

[0060] If the turbidity change rate is greater than or equal to the second preset change rate, it is determined that the aeration process is qualified.

[0061] Specifically, the turbidity change rate = (current turbidity - initial turbidity) / preset time length.

[0062] In the embodiment of the present application, the preset time length is 20 min, the first preset change rate is 1.0 NTU / min, and the second preset change rate is 2.0 NTU / min, but the above values are not limited thereto, and those skilled in the art can adjust the above values according to actual needs.

[0063] Specifically, in the case where the turbidity change rate is greater than or equal to the first preset change rate and less than the second preset change rate, the embodiment of the present application further determines again according to the concentration gradient index of hydrogen sulfide, considering the complexity of the aeration process. Under different water quality conditions, only relying on the turbidity change rate may not be able to comprehensively and accurately reflect the aeration effect. The concentration gradient index of hydrogen sulfide as a supplementary index can evaluate the removal of harmful gases such as hydrogen sulfide in water body from another angle. Through the secondary determination, the system can more accurately determine whether the current aeration amount is appropriate, avoid energy waste caused by excessive aeration or affect the treatment effect due to insufficient aeration, and realize dynamic optimization of aeration control and efficient use of resources.

[0064] Specifically, the aeration amount is positively correlated with the difference value of the change rate, wherein,

[0065] If the difference value of the change rate is less than a first preset difference value of the change rate, the aeration amount is adjusted to a corresponding value using a first aeration amount adjustment coefficient 1.1;

[0066] If the difference value of the change rate is greater than or equal to the first preset difference value of the change rate and less than a second preset difference value of the change rate, the aeration amount is adjusted to a corresponding value using a second aeration amount adjustment coefficient 1.25;

[0067] If the difference value of the change rate is greater than or equal to the second preset difference value of the change rate, the aeration amount is adjusted to a corresponding value using a third aeration amount adjustment coefficient 1.5;

[0068] The difference value of the change rate is a difference value between the first preset change rate and the change rate of the turbidity.

[0069] In the embodiment of the present application, the first preset difference value of the change rate is 0.1 NTU / min, the second preset difference value of the change rate is 0.3 NTU / min, and the initial aeration amount is 0.2 Nm³ / m³, but the above values are not limited thereto, and a person skilled in the art can adjust the above values according to actual needs.

[0070] Specifically, the eligibility of the aeration process is determined twice according to the concentration gradient index of hydrogen sulfide, wherein,

[0071] If the concentration gradient index is less than a preset concentration gradient index, it is determined that the aeration process is unqualified, and the aeration amount is increased according to a difference value between the preset concentration gradient index and the concentration gradient index;

[0072] If the concentration gradient index is greater than or equal to the preset concentration gradient index, it is determined that the aeration process is qualified.

[0073] Specifically, the concentration gradient index = |upper hydrogen sulfide concentration - middle hydrogen sulfide concentration| / concentration threshold value, in the embodiment of the present application, the concentration threshold value is 50 ppm, and the preset concentration gradient index is 0.4, but the above values are not limited thereto, and a person skilled in the art can adjust the above values according to actual needs.

[0074] Specifically, the aeration amount is positively correlated with the difference value of the concentration gradient index, the difference value of the concentration gradient index is a difference value between the preset concentration gradient index and the concentration gradient index, and the specific adjustment mode is the same as the above adjustment of the aeration amount, which will not be described here.

[0075] Specifically, the control module determines to start backwashing under the condition that the thickness of sulfur paste deposition is greater than or equal to a preset deposition thickness.

[0076] In the embodiment of the present application, the preset deposition thickness is 5 cm, but the value is not limited thereto, and those skilled in the art can adjust the value according to actual needs.

[0077] Specifically, the eligibility of backwashing is determined based on the turbidity reduction rate after single backwashing, wherein,

[0078] If the turbidity reduction rate is less than the preset reduction rate, it is determined that the backwashing is qualified.

[0079] If the turbidity reduction rate is greater than or equal to the preset reduction rate, it is determined that the backwashing is unqualified, and the backwashing duration is increased according to the difference between the turbidity reduction rate and the preset reduction rate.

[0080] Specifically, the turbidity reduction rate = (turbidity after backwashing - turbidity after second preset duration) / second preset duration, in the embodiment of the present application, the second preset duration is 10 minutes, and the preset reduction rate is 0.5 NTU / min, but the above values are not limited thereto, and those skilled in the art can adjust the above values according to actual needs.

[0081] Specifically, when the turbidity reduction rate is greater than or equal to the preset reduction rate, the sulfur paste may not be completely dispersed due to the substandard backwashing effect, and the sulfur paste reaccumulates in subsequent operation.

[0082] Specifically, there are several adjustment modes for the backwashing duration, and each adjustment mode has a different adjustment range for the backwashing duration, wherein,

[0083] If the turbidity reduction rate difference is less than the first preset reduction rate difference, the backwashing duration is increased to the corresponding value using the first duration adjustment coefficient 1.5;

[0084] If the turbidity reduction rate difference is greater than or equal to the first preset reduction rate difference and less than the second preset reduction rate difference, the backwashing duration is increased to the corresponding value using the second duration adjustment coefficient 1.8;

[0085] If the turbidity reduction rate difference is greater than or equal to the first preset reduction rate difference and less than the second preset reduction rate difference, the backwashing duration is increased to the corresponding value using the third duration adjustment coefficient 2.0;

[0086] The turbidity reduction rate difference is the difference between the turbidity reduction rate and the preset reduction rate.

[0087] In the embodiment of the present application, the first preset reduction rate difference is 0.12 NTU / min, the second preset reduction rate difference is 0.25 NTU / min, and the initial backwashing duration is 1 min, but the above values are not limited thereto, and those skilled in the art can adjust the above values according to actual needs.

[0088] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. An intelligent aeration regulating device for preventing sulfur paste precipitation, characterized in that: include: an aeration tank, the bottom of which is a conical structure; An aeration unit is provided inside the aeration tank and includes an aeration main pipe and a plurality of aeration branches, and is used to uniformly introduce oxygen into the sulfur-containing liquid to promote the oxidation and decomposition of hydrogen sulfide; A backwash unit, which is arranged at the lower part of the aeration branch pipe inside the aeration tank and includes a backwash pipe for regularly backwashing the sulfur paste deposited at the bottom of the aeration tank; a monitoring unit, comprising a first hydrogen sulfide sensor, a second hydrogen sulfide sensor, and a turbidity sensor, respectively arranged at the upper, middle, and lower portions of the inner sidewall of the aeration tank, and an ultrasonic sensor arranged at the center of the bottom of the aeration tank, for real-time monitoring of the hydrogen sulfide concentration, the suspended concentration of sulfur paste particles, and the sulfur paste deposition thickness in different areas of the aeration tank, and obtaining a turbidity change rate and a hydrogen sulfide concentration gradient index; a control module, connected to the aeration unit, the backwash unit, and the monitoring unit, respectively, for determining the eligibility of the aeration process based on the turbidity change rate within a preset aeration time, and if the aeration process is unqualified, for a second determination of the eligibility of the aeration process based on the hydrogen sulfide concentration gradient index; and for increasing the aeration volume if the second determination is unqualified; for determining when to start backwashing based on the thickness of the sulfur paste deposition; and for determining the eligibility of backwashing based on the turbidity decrease rate after a single backwash is started; and for increasing the backwashing time if the backwashing is unqualified; The control module determines the eligibility of the aeration process according to the turbidity change rate under a preset time period, wherein: If the turbidity change rate is less than a first preset change rate, the aeration process is determined to be unqualified, and the aeration volume is increased according to the difference between the first preset change rate and the turbidity change rate; If the turbidity change rate is greater than or equal to the first preset change rate and less than the second preset change rate, the aeration process is determined to be unqualified, and the eligibility of the aeration process is secondarily determined based on the concentration gradient index of hydrogen sulfide; If the turbidity change rate is greater than or equal to the second preset change rate, the aeration process is determined to be qualified; The eligibility of the aeration process is determined secondary based on the concentration gradient index of hydrogen sulfide, where: If the concentration gradient index is less than the preset concentration gradient index, the aeration process is judged as unqualified for the second time, and the aeration volume is increased according to the difference between the preset concentration gradient index and the concentration gradient index; If the concentration gradient index is greater than or equal to the preset concentration gradient index, the aeration process is secondarily determined to be qualified; The qualification of backwashing is determined based on the turbidity reduction rate after a single backwashing operation, where: If the turbidity decrease rate is less than the preset decrease rate, the backwash is judged to be qualified; If the turbidity decrease rate is greater than or equal to the preset decrease rate, the backwash is determined to be unqualified, and the backwash time is increased according to the difference between the turbidity decrease rate and the preset decrease rate.

2. The aeration intelligent regulating device for preventing sulfur paste precipitation according to claim 1, characterized in that: The air inlet of the aeration main pipe is arranged at the top of the first side wall of the aeration tank. The aeration main pipe includes an L-shaped pipe and an inverted T-shaped pipe in sequence from the air inlet to the air outlet, wherein the vertical pipe openings of the L-shaped pipe and the inverted T-shaped pipe are connected by a first flange.

3. The aeration intelligent regulating device for preventing sulfur paste precipitation according to claim 2 is characterized in that: A plurality of aeration branch pipes are horizontally arranged at equal intervals on both sides of the horizontal pipe of the inverted T-shaped pipe.

4. The aeration intelligent regulating device for preventing sulfur paste precipitation according to claim 3 is characterized in that: The second air inlet of the backwash pipe is arranged at the bottom of the second side wall of the aeration tank, and the opening direction of the backwash pipe faces the slopes on both sides of the bottom of the aeration tank.

5. The aeration intelligent regulating device for preventing sulfur paste precipitation according to claim 4 is characterized in that: The aeration volume is positively correlated with a change rate difference, and the change rate difference is a difference between the first preset change rate and the turbidity change rate.

6. The aeration intelligent regulating device for preventing sulfur paste precipitation according to claim 5 is characterized in that: The control module determines to start backwashing under the condition that the sulfur paste deposition thickness is greater than or equal to the preset deposition thickness.

7. The intelligent aeration regulating device for preventing sulfur paste precipitation according to claim 6, characterized in that: There are several adjustment methods for the backwash duration, and each adjustment method has a different adjustment range for the backwash duration.

Images