CN115893533A

CN115893533A - Control system, method and treatment system for refinery sewage treatment

Info

Publication number: CN115893533A
Application number: CN202110967686.1A
Authority: CN
Inventors: 杨超; 管向伟; 张逸轩; 丛彬; 曹紫薇
Original assignee: China National Petroleum Corp; China Kunlun Contracting and Engineering Corp
Current assignee: China National Petroleum Corp; China Kunlun Contracting and Engineering Corp
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2023-04-04

Abstract

The invention provides a control system, a method and a treatment system for refinery sewage treatment, wherein the control system comprises a central control device and a data monitoring device; the data monitoring device is used for acquiring water inlet characteristic parameter data of the sewage homogenizing device, acquiring water quality state parameter data in a pool of the sewage treatment device and sending the data to the central control device; the central control device is used for determining a feedforward adjusting instruction for controlling the sewage treatment device according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank, determining a feedback adjusting instruction for controlling the sewage treatment device according to the water quality state parameter data in the tank, and sending the feedforward adjusting instruction and/or the feedback adjusting instruction to corresponding controlled equipment of the sewage treatment device so as to control the controlled equipment to adjust the working state. The automatic control of the controlled equipment is realized through feedforward adjustment, the correction of the operating parameters of the controlled equipment is realized through feedback adjustment, the intelligent degree is higher, and the control adjustment is more accurate.

Description

Control system, method and treatment system for refinery sewage treatment

Technical Field

The invention relates to the technical field of water treatment, in particular to a control system for refinery sewage treatment, a control method for the control system for refinery sewage treatment and a refinery sewage treatment system.

Background

The oil refining waste water is mainly from petroleum, petrochemical industry and other industrial departments. In the petroleum refining process, the produced wastewater is oil refining wastewater. The oil refining sewage is typical industrial sewage, mainly comprises long-chain alkanes, lipids, volatile phenols and other harmful refractory organic pollutants, is usually treated by adopting a pretreatment, biological treatment and advanced treatment mode, and has the difficulties of poor water quality biodegradability, obvious impact effect, frequent adjustment of operation parameters and the like in the treatment process. If the treatment of the oil refining sewage does not reach the standard, the oil refining sewage has adverse effects on human beings, animals, plants and even the whole ecological system, the harm is mainly expressed by the formation of an oil film on the water surface, the reoxygenation of a water body can be blocked, the photosynthesis of algae is limited due to the reduction of dissolved oxygen in the water body, the normal growth of aquatic organisms is influenced, the aquatic animals and plants have oil smell or toxicity, even the water body is odorized, and the utilization value of water resources is damaged; oil adheres to fish gills and can suffocate the fish, and the fish cannot survive when the concentration is 200 mg/L; can be adhered to algae and plankton to kill them; the oil can inhibit the water bird from laying eggs and hatching, and in severe cases, the water bird can die in large quantity; when the oily wastewater is used for irrigating farmlands, oil and derivatives thereof cover the surfaces of soil and plants, block the pores of the soil, prevent air from permeating, prevent the soil and microorganisms from being metabolized normally, reduce the quality and practical value of agricultural products, cause crop reduction or death in severe cases, and cause serious groundwater pollution because the oil migrates downwards in the soil. In conclusion, the refinery sewage may cause destructive damage to the ecosystem and potential harm to human health.

Disclosure of Invention

In view of the problems in the related art, the present invention provides a control system for treating refinery sewage, a control method for a control system for treating refinery sewage, and a refinery sewage treatment system.

As one aspect of the embodiment of the invention, the invention relates to a control system for refinery sewage treatment, which is applied to a sewage treatment system, wherein the sewage treatment system comprises a sewage homogenizing device and at least one of the following sewage treatment devices: the anaerobic biological reaction device, the anoxic biological reaction device, the aerobic biological reaction device, the sedimentation device, the monitoring discharge device and the accident buffering device are characterized in that the control system comprises a central control device and a data monitoring device;

the data monitoring device is used for acquiring water inlet characteristic parameter data of the sewage homogenizing device, acquiring water quality state parameter data in a pool of the sewage treatment device and sending the water quality state parameter data to the central control device; the water inlet characteristic parameter data comprises at least one of the following data: inlet water quality data, inlet water flow data and inlet water level data; the water quality state parameter data in the pool comprises at least one of the following data: COD concentration data, pH value data, dissolved oxygen concentration data, sludge amount data, ammonia nitrogen concentration data and total nitrogen concentration data;

the central control device is used for determining a feedforward adjusting instruction for controlling the sewage treatment device according to the water inlet characteristic parameter data and/or the water quality state parameter data in the pool, determining a feedback adjusting instruction for controlling the sewage treatment device according to the water quality state parameter data in the pool, and sending the feedforward adjusting instruction and/or the feedback adjusting instruction to corresponding controlled equipment of the sewage treatment device so as to control the controlled equipment to adjust the working state.

In one or some optional embodiments, the central control device comprises a communication module and an analysis and calculation module;

the communication module is used for sending the received water inlet characteristic parameter data and/or the water quality state parameter data in the pool to the analysis and calculation module; sending the received feedforward regulation instruction and the feedback regulation instruction to the controlled equipment;

the analysis and calculation module is used for determining the feedforward regulation instruction according to the water inlet characteristic parameter data and/or the water quality state parameter data in the pool, determining the feedback regulation instruction according to the water quality state parameter data in the pool, and sending the feedforward regulation instruction and/or the feedback regulation instruction to the communication module.

In one or some alternative embodiments, the analytical computation module comprises a data processing model sub-module and a control decision sub-module;

the data processing model submodule is used for obtaining feedforward quantity to be adjusted in the sewage treatment device in a preset activated sludge model according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank and sending the feedforward quantity to the control decision submodule, and obtaining feedback quantity to be adjusted in the sewage treatment device in the activated sludge model according to the water quality state parameter data in the tank;

the control decision submodule is used for obtaining the operation parameters of the corresponding controlled equipment of the sewage treatment device according to the feedforward quantity to be regulated and determining the feedforward regulation instruction according to the operation parameters of the controlled equipment; and obtaining the operation parameter to be adjusted of the controlled equipment according to the feedback quantity to be adjusted and the current operation parameter of the controlled equipment, and determining the feedback adjustment instruction according to the operation parameter to be adjusted of the controlled equipment.

In one or some alternative embodiments, the inlet water quality data includes inlet water total nitrogen concentration, inlet water COD concentration, and inlet water ammonia nitrogen concentration;

the data monitoring device comprises a water inlet total nitrogen concentration monitoring device, a water inlet COD concentration monitoring device and a water inlet ammonia nitrogen concentration monitoring device;

the inlet water total nitrogen concentration monitoring device is used for monitoring the inlet water total nitrogen concentration of the sewage homogenizing device;

the inlet water COD concentration monitoring device is used for monitoring the inlet water COD concentration of the sewage homogenizing device;

the inlet water ammonia nitrogen concentration monitoring device is used for monitoring the inlet water ammonia nitrogen concentration of the sewage homogenizing device.

In one or some optional embodiments, the anoxic biological reaction device comprises an anoxic pond and a carbon source adding device;

the data processing model submodule is specifically used for obtaining feed-forward carbon source adding amount parameter data in the anoxic tank according to the total nitrogen concentration and the COD concentration of the inlet water in the activated sludge model;

the control decision submodule is specifically configured to obtain a feedforward operation parameter of the carbon source adding equipment according to the feedforward carbon source adding amount parameter data, and determine the feedforward adjustment instruction according to the feedforward operation parameter.

In one or some alternative embodiments, the data monitoring device comprises an anoxic tank total nitrogen concentration monitoring device and an anoxic tank COD concentration monitoring device; the oxygen-deficient pool total nitrogen concentration monitoring device is used for monitoring the total nitrogen concentration in the oxygen-deficient pool; the COD concentration monitoring device is used for monitoring the COD concentration in the anoxic tank;

the data processing model submodule is also used for obtaining feedback carbon source adding amount parameter data in the anoxic tank according to the total nitrogen concentration in the anoxic tank and the COD concentration in the anoxic tank in the activated sludge model;

the control decision sub-module is further configured to obtain a feedback operation parameter of the carbon source adding equipment according to the feedback carbon source adding amount parameter data and the current operation parameter of the carbon source adding equipment, and determine the feedback adjustment instruction according to the feedback operation parameter.

In one or some alternative embodiments, the aerobic biological reaction device comprises an aerobic tank, an alkali liquor feeding device and an aeration device;

the data processing model submodule is specifically used for obtaining feed-forward alkali addition quantity parameter data in the aerobic tank according to the concentration of the ammonia nitrogen of the inlet water in a preset activated sludge model, and obtaining feed-forward aeration quantity parameter data in the aerobic tank according to the concentration of COD of the inlet water;

the control decision submodule is specifically configured to obtain a feedforward operation parameter of the alkali liquor feeding equipment according to the feedforward alkali feeding amount parameter data, obtain a feedforward operation parameter of the aeration equipment according to the feedforward aeration amount parameter data, and determine the feedforward adjustment instruction according to the feedforward operation parameter of the alkali liquor feeding equipment and the feedforward operation parameter of the aeration equipment.

In one or some alternative embodiments, the data monitoring device further comprises a pH monitoring device and a dissolved oxygen monitoring device; the pH monitoring device is used for monitoring pH value data in the aerobic tank; the dissolved oxygen monitoring device is used for monitoring dissolved oxygen data in the aerobic tank;

the data processing model submodule is also used for obtaining feedback alkali addition quantity parameter data in the aerobic tank according to the pH value data in a preset activated sludge model and obtaining feedback aeration quantity parameter data in the aerobic tank according to the dissolved oxygen data;

the control decision submodule is further used for obtaining feedback operation parameters of the alkali liquor feeding device according to the feedback alkali adding amount parameter data and current operation parameters of the alkali liquor feeding device, obtaining feedback operation parameters of the aeration device according to the feedback aeration amount parameter data and the current operation parameters of the aeration device, and determining the feedback adjusting instruction according to the feedback operation parameters of the alkali liquor feeding device and the feedback operation parameters of the aeration device.

In one or some alternative embodiments, the sewage treatment apparatus further comprises a sewage return pump; the inlet of the sewage reflux pump is connected with the outlet of the aerobic tank, and the outlet of the sewage reflux pump is connected with the anoxic tank of the anoxic biological reaction device;

the data monitoring device also comprises an anoxic tank effluent total nitrogen monitoring device which is used for monitoring the effluent total nitrogen concentration in the anoxic tank;

the data processing model submodule is used for obtaining feedforward sewage reflux ratio data according to the total nitrogen concentration of the inlet water and obtaining feedback sewage reflux ratio data according to the total nitrogen concentration of the outlet water in the anoxic tank;

the control decision submodule is used for obtaining a feedforward operation parameter of the sewage reflux pump according to the feedforward sewage reflux ratio data and determining the feedforward adjustment instruction according to the feedforward operation parameter of the sewage reflux pump; and obtaining feedback operation parameters of the sewage reflux pump according to the feedback sewage reflux ratio data, and determining the feedback regulation instruction according to the feedback operation parameters of the sewage reflux pump.

In one or some optional embodiments, the sewage treatment device further comprises a sludge reflux pump and a sludge discharge pump; the inlet of the sludge reflux pump is connected with the bottom sludge discharge port of the sedimentation device, and the outlet of the sludge reflux pump is connected with the aerobic tank of the aerobic biological reaction device; the inlet of the sludge discharge pump is connected with the bottom sludge discharge port;

the data monitoring device comprises an aerobic tank sludge concentration monitoring device, a return sludge concentration monitoring device and a sludge flow monitoring device; the aerobic tank sludge concentration monitoring device is used for monitoring the sludge concentration of the aerobic tank; the returned sludge concentration monitoring device is used for monitoring the returned sludge concentration of the sludge return pump; the sludge flow monitoring device is used for monitoring the amount of sludge discharged from the sedimentation device;

the data processing model submodule is used for calculating sludge age data according to the sludge concentration of the aerobic tank, the tank capacity of the aerobic tank, the discharged sludge amount of the sedimentation device and the return sludge concentration of the sludge return pump;

and the control decision submodule is used for obtaining the operating parameters of the sludge efflux pump according to the sludge age data and determining the adjustment instruction of the sludge efflux pump according to the operating parameters of the sludge efflux pump.

In one or some optional embodiments, the control decision sub-module is further configured to obtain an operation parameter of the sludge reflux pump according to the sludge concentration of the aerobic tank, and determine a sludge reflux pump adjustment instruction according to the operation parameter of the sludge reflux pump.

In one or some optional embodiments, the sewage homogenizing device includes a water inlet accident drain valve, and the water inlet accident drain valve is connected to the accident buffering device, wherein the control decision sub-module is further configured to determine whether at least one of a total nitrogen concentration of inlet water, a COD concentration of inlet water, and an ammonia nitrogen concentration of inlet water of the sewage homogenizing device is greater than a preset threshold of water quality of inlet water, and if so, send an opening instruction to the water inlet accident drain valve.

In one or some optional embodiments, the data monitoring device further comprises a homogenizing pool water inlet flow monitoring device and a homogenizing pool liquid level monitoring device; the homogenizing pool water inlet flow monitoring device is used for monitoring the water inlet flow data; the homogenizing tank liquid level monitoring device is used for monitoring the water inlet liquid level data;

the control decision submodule is also used for determining whether the water inflow data is larger than a preset water inflow threshold or not, or whether the water inflow liquid level data is larger than a preset water inflow liquid level threshold or not, and if so, sending an opening instruction to the water inflow accident drain valve.

In one or some alternative embodiments, the monitoring drain comprises a water-out accident drain valve; the water outlet accident drain valve is connected with the accident buffering device;

the data monitoring device also comprises a water outlet total nitrogen concentration monitoring device, a water outlet COD concentration monitoring device and a water outlet ammonia nitrogen concentration monitoring device;

the effluent total nitrogen concentration monitoring device is used for monitoring the effluent total nitrogen concentration of the monitoring discharge device;

the effluent COD concentration monitoring device is used for monitoring the effluent COD concentration of the monitoring discharge device;

the effluent ammonia nitrogen concentration monitoring device is used for monitoring the effluent ammonia nitrogen concentration of the monitoring discharge device;

and the control decision submodule is also used for determining whether at least one of the total nitrogen concentration, COD concentration and ammonia nitrogen concentration of the effluent of the monitoring and discharging device is greater than a preset threshold value of the effluent quality, and if so, sending an opening instruction to the effluent accident drain valve.

In one or some optional embodiments, the data monitoring device further comprises a drain pool effluent flow monitoring device and a drain pool liquid level monitoring device; the discharge pool water outlet flow monitoring device is used for monitoring the water outlet flow data of the discharge device; the drainage pool liquid level monitoring device is used for monitoring the effluent liquid level data of the drainage pool;

the control decision sub-module is further configured to determine whether the water outlet flow data is greater than a preset water outlet flow threshold, or whether the water outlet liquid level data is greater than a preset water outlet liquid level threshold, and if so, send an opening instruction to the water outlet accident drain valve.

In one or some optional embodiments, the analysis calculation module further comprises: an early warning module;

and the control decision submodule is also used for sending an early warning instruction to the early warning module.

As another aspect of the embodiment of the present invention, a control method of a control system for refinery-related sewage treatment, includes:

collecting water inlet characteristic parameter data of a sewage homogenizing device and water quality state parameter data in a pool of a sewage treatment device; the water inlet characteristic parameter data comprises at least one of the following data: inlet water quality data, inlet water flow data and inlet water level data; the water quality state parameter data in the pool comprises at least one of the following data: COD concentration data, pH value data, dissolved oxygen concentration data, sludge amount data, ammonia nitrogen concentration data and total nitrogen concentration data;

determining a feed-forward regulation instruction for controlling the sewage treatment device according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank, and,

determining a feedback regulation instruction for controlling the sewage treatment device according to the water quality state parameter data in the tank;

and sending the feedforward regulation instruction and/or the feedback regulation instruction to corresponding controlled equipment of the sewage treatment device so as to control the controlled equipment to regulate the working state.

As a third aspect of the embodiments of the present invention, there is provided an refinery-related sewage treatment system including: the control system for the treatment of the refining sewage.

The invention has the beneficial technical effects that:

the invention discloses a control system for treating refinery sewage, which collects water inlet characteristic parameter data of a sewage homogenizing device and water quality state parameter data in a pool of the sewage treatment device through a data monitoring device 2, further determines a feedforward adjusting instruction and a feedback adjusting instruction for controlling the sewage treatment device through a central control device 1, forms a feedforward and feedback control mechanism, and realizes the control of controlled equipment of the sewage treatment device to adjust the working state. Realize the automatic control of controlled equipment through feedforward adjustment to realize revising through the operating parameter of feedback adjustment to controlled equipment, intelligent degree is higher, and control adjustment is more accurate, has reduced the energy loss and the medicament loss among the sewage treatment process, has improved sewage treatment system's operating efficiency, has practiced thrift manufacturing cost.

In the control system for the refinery sewage treatment disclosed by the invention, a data processing model submodule of the central control device 1 analyzes real-time water quality data through a preset Activated Sludge Model (ASM) to form a sewage treatment control decision scheme, obtains medicament parameter data to be regulated, further obtains operation parameters of controlled equipment of the sewage treatment device through the control decision submodule, and automatically controls the controlled equipment through a feedforward instruction. Compared with a control mode of directly adopting a feedback mechanism, the invention can utilize the activated sludge model to carry out analysis and calculation according to the data of the quality, the flow, the liquid level and the like of sewage inlet water to obtain a feedforward signal of the operation parameter of controlled equipment of the sewage treatment device, and the operation parameter of the controlled equipment is timely adjusted by matching the feedforward signal with the feedback signal, thereby effectively preventing the impact of the sewage inlet water change on a sewage treatment system and improving the sewage treatment effect of the sewage treatment device.

Drawings

FIG. 1 is a schematic structural view of a refinery-based sewage treatment system according to an embodiment of the present invention;

FIG. 2 is a flow chart illustrating a control method of a control system for refinery sewage treatment according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The inventor finds that in the prior art, petroleum refining enterprises generally adopt a manual mode to adjust controlled equipment of each sewage treatment device, so that the operation efficiency of a sewage treatment system for oil refining sewage is low, the quality of sewage treatment seriously depends on the capability and proficiency of equipment operators due to the influence of human factors, and is limited by the hysteresis of manual operation, so that the problems of low operation efficiency, high energy consumption and drug consumption, insufficient manpower resources and the like generally exist in the sewage treatment system of the petroleum refining enterprises, and even the serious result that the quality of effluent treated by the sewage treatment system exceeds the standard is caused. The present invention has been made to solve at least some of the problems occurring in the prior art, and provides, in accordance with specific embodiments, a control system for wastewater treatment, a control method for a control system for wastewater treatment, and a wastewater treatment system.

Example 1

Referring to fig. 1, an embodiment of the present invention provides a control system for refinery sewage treatment, which is applied to a sewage treatment system, where the sewage treatment system includes a sewage homogenizing device 3 and at least one of the following sewage treatment devices: the system comprises an anaerobic biological reaction device 4, an anoxic biological reaction device 5, an aerobic biological reaction device 6, a precipitation device 7, a monitoring discharge device 8 and an accident buffering device 9, wherein the control system comprises a central control device 1 and a data monitoring device 2;

the data monitoring device 2 is used for acquiring water inlet characteristic parameter data of the sewage homogenizing device, acquiring water quality state parameter data in a pool of the sewage treatment device and sending the water quality state parameter data to the central control device 1;

the water inlet characteristic parameter data comprises at least one of the following data: inlet water quality data, inlet water flow data and inlet water level data;

the water quality state parameter data in the pool comprises at least one of the following data: COD concentration data, pH value data, dissolved oxygen concentration data, sludge amount data, ammonia nitrogen concentration data and total nitrogen concentration data;

the central control device 1 is configured to determine a feed-forward regulation instruction for controlling the sewage treatment device according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank, determine a feedback regulation instruction for controlling the sewage treatment device according to the water quality state parameter data in the tank, and send the feed-forward regulation instruction and/or the feedback regulation instruction to a corresponding controlled device of the sewage treatment device to control the controlled device to regulate a working state.

The invention discloses a control system for treating refinery sewage, which collects water inlet characteristic parameter data of a sewage homogenizing device and water quality state parameter data in a pool of the sewage treatment device through a data monitoring device 2, further determines a feedforward adjusting instruction and a feedback adjusting instruction for controlling the sewage treatment device through a central control device 1, forms a feedforward and feedback control mechanism, and realizes the control of controlled equipment of the sewage treatment device to adjust the working state. Realize the automatic control of controlled equipment through feedforward adjustment to realize revising through feedback control to the operating parameter of controlled equipment, intelligent degree is higher, and control adjustment is more accurate, has reduced the energy loss and the medicament loss among the sewage treatment process, has improved sewage treatment system's operating efficiency, has practiced thrift manufacturing cost.

In one embodiment, referring to fig. 1, the hub control device 1 includes a communication module 102 and an analysis and calculation module 101;

the communication module 102 is configured to send the received water inlet characteristic parameter data and/or the received water quality state parameter data in the tank to the analysis and calculation module 101; sending the received feedforward regulation instruction and the feedback regulation instruction to the controlled equipment;

the analysis and calculation module 101 is configured to determine the feedforward adjustment instruction according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank, determine the feedback adjustment instruction according to the water quality state parameter data in the tank, and send the feedforward adjustment instruction and/or the feedback adjustment instruction to the communication module 102.

In one embodiment, the analytical computation module 101 includes a data processing model sub-module 1011 and a control decision sub-module 1012;

the data processing model submodule 1011 is configured to obtain, in a preset activated sludge model, a feedforward amount to be adjusted in the sewage treatment apparatus according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank, and send the feedforward amount to the control decision submodule 1012, and obtain, in the activated sludge model, a feedback amount to be adjusted in the sewage treatment apparatus according to the water quality state parameter data in the tank;

the control decision sub-module 1012 is configured to obtain an operation parameter of a corresponding controlled device of the sewage treatment apparatus according to the feedforward quantity to be adjusted, and determine the feedforward adjustment instruction according to the operation parameter of the controlled device; and obtaining the operation parameters to be adjusted of the controlled equipment according to the feedback quantity to be adjusted and the current operation parameters of the controlled equipment, and determining the feedback adjustment instruction according to the operation parameters to be adjusted of the controlled equipment.

In the control system for refinery sewage treatment disclosed by the invention, a data processing model submodule 1011 of the central control device 1 analyzes real-time water quality data through a preset Activated Sludge Model (ASM) to form a sewage treatment control decision scheme, obtains medicament parameter data to be regulated, further obtains operation parameters of controlled equipment of the sewage treatment device through a control decision submodule 1012, and automatically controls the controlled equipment through a feedforward instruction. Compared with a control mode of directly adopting a feedback mechanism, the invention can utilize the activated sludge model to carry out analysis and calculation according to the data of the quality, the flow, the liquid level and the like of sewage inlet water to obtain a feedforward signal of the operation parameter of controlled equipment of the sewage treatment device, and the operation parameter of the controlled equipment is timely adjusted by matching the feedforward signal with the feedback signal, thereby effectively preventing the impact of the sewage inlet water change on a sewage treatment system and improving the sewage treatment effect of the sewage treatment device.

The inventor of the present invention finds that, in the control mode of the sewage treatment system directly adopting the feedback mechanism, because the controlled equipment of the sewage treatment device is subjected to feedback regulation according to the data in the tank of the sewage treatment device collected by the data monitoring device after the refinery sewage treatment has started, the feedback regulation instruction has certain hysteresis and cannot completely adapt to the change of the sewage quality, such as: if the chemical oxygen demand COD in the influent of the refinery wastewater is suddenly increased from 200mg/L to 1000mg/L, only by using a feedback mechanism, the aeration apparatus of the aerobic biological reaction apparatus 6 may adjust the operation state under the control of the signal of the feedback adjustment instruction when the dissolved oxygen in the aerobic tank of the aerobic biological reaction apparatus 6 is reduced to no longer meet the preset requirement, so as to increase the aeration amount of the aerobic tank, and at this time, the wastewater treatment efficiency of the aerobic biological reaction apparatus 6 may be decreased.

Therefore, the inventor of the present invention proposes that, by calculating and predicting the dosing amount parameter of the sewage treatment device in the data processing model submodule 1011 and in the preset activated sludge model according to the water inlet characteristic parameter data of the sewage to be treated, when the water quality of the sewage changes, the controlled device of the sewage treatment device can be timely controlled through the feedforward adjustment instruction, so that the sewage treatment device can be adjusted to the operating state in advance to adapt to the change of the water quality of the sewage, for example, when the chemical oxygen demand COD in the water inlet of the oil refining sewage is suddenly increased from 200mg/L to 1000mg/L, the feedforward adjustment instruction is issued by the data processing model submodule 1011 in the preset activated sludge model, the dissolved oxygen data of the aerobic tank is predicted according to the water inlet characteristic parameter data of the sewage to be treated, the sewage with chemical oxygen demand COD of 1000mg/L enters the aerobic tank, and the like before entering the aerobic tank, the feedforward adjustment instruction is issued to control the operating state of the aeration device, so that the dissolved oxygen concentration in the tank is increased to the range suitable for the COD of 1000mg/L, and the aerobic tank is adjusted, and the aeration device can also perform the aeration control and feedback on the aerobic tank, so that the dissolved oxygen concentration in the sewage treatment process, and the aeration device can be adjusted in advance, and the aeration device, so as to perform the aeration device, and the aeration device can perform the aeration device, and perform the aeration device, so as to perform the aeration device, and perform the aeration device.

In the embodiment of the invention, the adopted mechanism of feedforward and feedback regulation can refer to the specific implementation mode of feedforward and feedback in the prior art, and the decision mode when the feedforward regulation instruction and the feedback regulation instruction conflict can be realized by setting the regulation method of feedforward and feedback. For example, when the feed-forward regulation instruction and the feedback regulation instruction conflict, the feedback regulation instruction is used as a final instruction signal to be sent to the controlled equipment of the sewage treatment device. For example, when the operating parameters of the aeration equipment of the aerobic biological reaction device are controlled by instructions, if the aeration quantity of the aeration equipment needs to be reduced according to the feedforward adjustment instruction, and the aeration quantity of the aeration equipment needs to be increased according to the feedback adjustment instruction, at this time, the feedback adjustment instruction is determined to be sent to the aeration equipment through a preset decision mode so as to realize the increase of the aeration quantity of the aeration equipment.

In the embodiment of the present invention, the anaerobic biological reaction device 4 is used for improving the biodegradability of the sewage through hydrolysis acidification, the anoxic biological reaction device 5 is used for denitrifying nitrate nitrogen in the sewage into nitrogen, and the aerobic biological reaction device 6 is used for oxidizing ammonia nitrogen in the sewage into nitrate nitrogen and removing COD.

In one embodiment, the sewage treatment system may include an anaerobic biological reaction device 4, an anoxic biological reaction device 5, and an aerobic biological reaction device 6. For example, referring to fig. 1, the sewage treatment apparatus of the sewage treatment system includes an accident buffering apparatus 9, a sewage homogenizing apparatus 3, an anaerobic biological reaction apparatus 4, an anoxic biological reaction apparatus 5, an aerobic biological reaction apparatus 6, a sedimentation apparatus 7, and a monitoring discharge apparatus 8. Wherein, the sewage homogenizing device 3, the anaerobic biological reaction device 4, the anoxic biological reaction device 5, the aerobic biological reaction device 6, the sedimentation device 7 and the monitoring discharge device 8 are connected in sequence, and the accident buffering device 9 is respectively connected with the sewage homogenizing device 3 and the monitoring discharge device 8.

The following describes in detail the control system for treating refinery sewage provided by the embodiment of the present invention, taking the sewage treatment system shown in fig. 1 as an example:

referring to fig. 1, in the embodiment of the present invention, the anoxic biological reaction device 5 of the sewage treatment system includes an anoxic tank (not shown in the figure) and a carbon source adding apparatus (not shown in the figure); the aerobic biological reaction device 6 of the sewage treatment system comprises an aerobic tank (not shown in the figure), an alkali liquor adding device (not shown in the figure) and an aeration device (not shown in the figure); the water inlet of a sewage reflux pump 10 of the sewage treatment system is connected with the water outlet of an aerobic tank, and the water outlet of the sewage reflux pump 10 is connected with an anoxic tank of an anoxic biological reaction device 5; the inlet of a sludge reflux pump 11 of the sewage treatment system is connected with a sludge discharge port at the bottom of a sedimentation device 7 of the sewage treatment system, and the outlet of the sludge reflux pump 11 is connected with an aerobic tank of an aerobic biological reaction device 6; the inlet of the sludge discharge pump of the sewage treatment system is connected with the bottom sludge discharge port of the sedimentation device 7 of the sewage treatment system; the sewage homogenizing device 3 of the sewage treatment system comprises a water inlet accident drain valve (not shown in the figure), the water inlet accident drain valve is connected with an accident buffering device 9, the monitoring and discharging device 8 of the sewage treatment system comprises a water outlet accident drain valve (not shown in the figure), and the water outlet accident drain valve is also connected with the accident buffering device 9.

When the sewage treatment system is put into operation, the data monitoring device 2 is used for acquiring water inlet characteristic parameter data of the sewage homogenizing device 3, wherein the water inlet characteristic parameter data comprise water inlet quality data, water inlet flow data and water inlet level data, and the central control device 1 of the control system initializes the preset activated sludge model of the data treatment model submodule 1011 according to the water inlet characteristic parameter data of the sewage homogenizing device 3 to obtain the model parameters of the preset activated sludge model.

In the embodiment of the method, the preset Activated Sludge Model may be a Model obtained according to IWA (International Water Association, IWA) Model of Activated Sludge Model 1 ASM1 (Activated Sludge Model No. l), activated Sludge Model 2 ASM2 or Activated Sludge Model 3 in the prior art, wherein Model parameters of the preset Activated Sludge Model may include soluble nonbiodegradable organic compounds Fus, granular nonbiodegradable organic compounds Fup, fast biodegradable organic compounds Fbs, non-colloidal slowly biodegradable organic compounds Fxps, granular nonbiodegradable COD content FupN, and the like. In the embodiment of the invention, the parameters of the model can be set according to the water inlet characteristic parameter data of the sewage homogenizing device 3 collected by the data monitoring device 2, so as to obtain the parameter values of the model parameters. In the embodiment of the present invention, a specific implementation process for determining the parameter values of the model parameters of the activated sludge model may refer to detailed descriptions about the activated sludge model in the prior art, and is not described herein again.

In the embodiment of the invention, after the feedforward quantity to be regulated of each sewage treatment device is predicted and obtained according to the preset activated sludge model, if an operator finds that the feedforward quantity to be regulated deviates from the actual reagent dosage of the sewage treatment device in the operation process, the reagent dosage can be corrected according to the actual reagent dosage, and of course, if the feedforward quantity to be regulated of each sewage treatment device predicted and obtained through the preset activated sludge model always deviates from the requirement of the actual reagent dosage in the operation process, the model corrector can correct the parameters of the preset activated sludge model according to the actual requirement, so that the reagent dosage of the sewage treatment device predicted and obtained according to the preset activated sludge model more accords with the actual sewage treatment requirement.

In the embodiment of the present invention, in the preset activated sludge model, according to the collected water inlet characteristic parameter data, the adding amount data of the chemical agent to be added to each sewage treatment device in the sewage treatment system can be calculated, for example, when the sewage treatment system is put into operation, the water inlet characteristic parameter data in the sewage homogenizing device 3 can be collected first, when the data processing model submodule 1011 receives the water inlet characteristic parameter data, the carbon source adding amount parameter data in the anoxic biological reaction device 5 can be calculated in the preset activated sludge model, further, the control decision submodule 1012 can calculate the operation parameters of the carbon source adding device of the anoxic biological reaction device 5 according to the calculated carbon source adding amount parameter data, including the prepared mother liquor with a certain concentration, the carbon source adding chemical pump flowmeter, the carbon source pipeline diameter, and the like, and according to the obtained operation parameters of the carbon source adding device, send a corresponding feed-forward adjustment instruction to the carbon source adding device.

Similarly, when the data processing model sub-module 1011 receives the water inlet characteristic parameter data, the alkali liquor feeding amount parameter data and the dissolved oxygen concentration data in the aerobic biological reaction device 6 can be calculated and obtained in the preset activated sludge model, and further, the control decision sub-module 1012 can calculate and obtain the operation parameters of the alkali liquor feeding device of the aerobic biological reaction device 6 according to the calculated alkali liquor feeding amount parameter data, wherein the operation parameters include the prepared alkali liquor with a certain concentration, the alkali liquor feeding pump flow rate, the alkali liquor pipeline pipe diameter and the like, and the operation parameters of the aeration device of the aerobic biological reaction device 6 are calculated and obtained according to the calculated dissolved oxygen concentration data, and include the operation power of the aeration fan, the oxygen dissolution efficiency parameters and the like, and corresponding feedforward adjustment instructions are sent to the alkali liquor feeding device and the aeration device according to the obtained operation parameters of the alkali liquor feeding device and the operation parameters of the aeration device.

In the embodiment of the invention, the data monitoring device 2 for acquiring the water inlet characteristic parameter data can adopt an acquisition device in the prior art, for example, the water inlet quality monitoring device can acquire water inlet COD, pH, dissolved oxygen, ammonia nitrogen and total nitrogen quality data, the water inlet flow sensor acquires water inlet flow data, and the liquid level sensor acquires water inlet level data. Because the types of the data required to be collected are different, and the number of the sewage treatment devices of the sewage treatment system is multiple, when the water inlet characteristic parameter data are collected, a plurality of different data monitoring devices 2 can be adopted to respectively collect different water inlet characteristic parameter data of different sewage treatment devices.

In an embodiment of the present invention, the feedforward amount to be adjusted may include: feed-forward carbon source adding amount parameter data in the anoxic tank, feed-forward alkali adding amount parameter data in the aerobic tank, feed-forward aeration amount parameter data in the aerobic tank and feed-forward sewage reflux ratio data; the feedback amount to be adjusted may include: feeding back carbon source adding amount parameter data in the anoxic tank, feeding back alkali adding amount parameter data in the aerobic tank, feeding back aeration amount parameter data in the aerobic tank and feeding back sewage reflux ratio data. Of course, based on the sewage treatment system, the feed-forward quantity to be adjusted may also include parameter data of feed-forward addition quantities of other chemicals, and likewise, the feedback quantity to be adjusted may also include parameter data of feedback addition quantities of other chemicals.

In one embodiment, the influent water quality data includes influent total nitrogen concentration, influent COD concentration, and influent ammonia nitrogen concentration;

the influent ammonia nitrogen concentration monitoring device is used for monitoring the influent ammonia nitrogen concentration of the sewage homogenizing device.

Of course, when the collection of the water quality state parameter data in the tanks of different sewage treatment devices is realized, different data monitoring devices 2 may be respectively adopted, for example, a total nitrogen concentration monitoring device may be adopted when the total nitrogen concentration parameter data of the anoxic tank is collected, a COD concentration monitoring device may be adopted when the COD concentration parameter data of the anoxic biological reaction device 5 is collected, an ammonia nitrogen concentration monitoring device may be adopted when the ammonia nitrogen concentration parameter data of the aerobic biological reaction device 6 is collected, a dissolved oxygen monitoring device may be adopted when the dissolved oxygen data of the aerobic biological reaction device 6 is collected, and a pH monitoring device may be adopted when the pH data of the aerobic biological reaction device 6 is collected.

In the embodiment of the invention, the sewage treatment device of the sewage treatment system adjusts the operation parameters of the controlled equipment according to the obtained feedforward adjusting instruction, the water quality state parameter data in the tank of the sewage treatment device can be monitored by the data monitoring device 2 in the operation process of the controlled equipment, and when the water inlet characteristic parameter data is received by the data processing model submodule 1011, the feedback quantity to be adjusted in the sewage treatment device can be obtained in the activated sludge model according to the water quality state parameter data in the tank; and then the control decision sub-module 1012 obtains the operation parameter to be adjusted of the controlled device according to the feedback quantity to be adjusted and the current operation parameter of the controlled device, and determines the feedback adjustment instruction according to the operation parameter to be adjusted of the controlled device.

In one embodiment, the anoxic biological reaction apparatus 5 comprises an anoxic tank (not shown in the figure) and a carbon source adding device (not shown in the figure);

the data processing model submodule 1011 is specifically used for obtaining feed-forward carbon source adding amount parameter data in the anoxic tank according to the total nitrogen concentration of the inlet water and the COD concentration of the inlet water in the activated sludge model;

the control decision sub-module 1012 is specifically configured to obtain a feed-forward operation parameter of the carbon source adding equipment according to the feed-forward carbon source adding amount parameter data, and determine the feed-forward adjustment instruction according to the feed-forward operation parameter.

In one embodiment, the data monitoring device 2 comprises an anoxic tank total nitrogen concentration monitoring device and an anoxic tank COD concentration monitoring device (not shown in the figure), wherein the anoxic tank total nitrogen concentration monitoring device is used for monitoring the total nitrogen concentration in the anoxic tank;

the COD concentration monitoring device is used for monitoring the COD concentration in the anoxic tank of the anoxic biological reaction device 5;

the data processing model submodule 1011 is also used for obtaining feedback carbon source adding quantity parameter data in the anoxic tank according to the total nitrogen concentration in the anoxic tank and the COD concentration in the anoxic tank in the activated sludge model;

the control decision sub-module 1012 is further configured to obtain a feedback operation parameter of the carbon source adding equipment according to the feedback carbon source adding amount parameter data and the current operation parameter of the carbon source adding equipment, and determine the feedback adjustment instruction according to the feedback operation parameter.

In the embodiment of the present invention, the total nitrogen concentration in the anoxic tank of the anoxic biological reaction device 5 is obtained by the anoxic tank total nitrogen concentration monitoring device, the anoxic tank COD concentration monitoring device obtains the COD concentration in the anoxic tank of the anoxic biological reaction device 5, feedback carbon source addition amount parameter data to be added in the anoxic tank can be obtained by calculation according to the COD concentration in the anoxic tank and the total nitrogen concentration in the anoxic tank, and a process of specifically calculating the feedback carbon source addition amount parameter data to be added in the anoxic tank may refer to detailed description of implementation manners in the related prior art.

In a specific embodiment, the aerobic biological reaction device 6 comprises an aerobic tank, an alkali liquor feeding device and an aeration device;

the data processing model submodule 1011 is specifically used for obtaining feed-forward alkali addition quantity parameter data in the aerobic tank according to the concentration of ammonia nitrogen in inlet water in a preset activated sludge model, and obtaining feed-forward aeration quantity parameter data in the aerobic tank according to the concentration of COD in the inlet water;

the control decision sub-module 1012 is specifically configured to obtain a feedforward operation parameter of the alkali liquor adding device according to the feedforward alkali adding amount parameter data, obtain a feedforward operation parameter of the aeration device according to the feedforward aeration amount parameter data, and determine a feedforward adjustment instruction according to the feedforward operation parameter of the alkali liquor adding device and the feedforward operation parameter of the aeration device.

In one embodiment, the data monitoring device 2 further comprises a pH monitoring device (not shown) and a dissolved oxygen monitoring device (not shown);

the pH monitoring device is used for monitoring pH value data in the aerobic tank;

the dissolved oxygen monitoring device is used for monitoring dissolved oxygen data in the aerobic tank;

the data processing model submodule 1011 is also used for obtaining feedback alkali addition quantity parameter data in the aerobic tank according to the pH value data in the preset activated sludge model and obtaining feedback aeration quantity parameter data in the aerobic tank according to the dissolved oxygen data;

the control decision sub-module 1012 is further configured to obtain a feedback operation parameter of the alkali liquor adding device according to the feedback alkali adding amount parameter data and the current operation parameter of the alkali liquor adding device, obtain a feedback operation parameter of the aeration device according to the feedback aeration amount parameter data and the current operation parameter of the aeration device, and determine a feedback adjustment instruction according to the feedback operation parameter of the alkali liquor adding device and the feedback operation parameter of the aeration device.

In the embodiment of the invention, after the sewage treatment system is put into operation, the oil refining sewage passing through the sewage homogenizing device 3 sequentially enters the anaerobic biological reaction device 4, the anoxic biological reaction device 5 and the aerobic biological reaction device 6 for biological treatment. The central control device 1 analyzes the water quality state parameter data in the reaction tank (including the anaerobic tank of the anaerobic biological reaction device 4, the anoxic tank of the anoxic biological reaction device 5 and the aerobic tank of the aerobic biological reaction device 6) of the sewage treatment device in real time through the data processing model submodule 1011. When the anoxic tank lacks a carbon source, the control decision sub-module 1012 obtains feedback operation parameters of the carbon source adding equipment according to the feedback carbon source adding amount parameter data and the current operation parameters of the carbon source adding equipment, so as to send a feedback adjustment instruction, automatically start and adjust the operation state of the carbon source adding equipment, and thus add the required carbon source to the anoxic tank. When the pH value of the aerobic tank is reduced, the control decision submodule 1012 obtains the feedback operation parameters of the alkali liquor feeding equipment according to the feedback alkali feeding amount parameter data and the current operation parameters of the alkali liquor feeding equipment, so as to send a feedback adjustment instruction, automatically adjust the operation state of the alkali liquor feeding equipment and feed the required alkali liquor into the aerobic tank. When the dissolved oxygen concentration of the aerobic tank is lower or higher, the control decision sub-module 1012 obtains the feedback operation parameters of the aeration equipment according to the feedback aeration quantity parameter data and the current operation parameters of the aeration equipment, so as to send a feedback adjustment instruction, automatically increase or decrease the operation power of the aeration equipment, and adjust the dissolved oxygen in the aerobic tank to the preset dissolved oxygen concentration range.

In one embodiment, the sewage treatment apparatus of the sewage treatment system further includes a sewage return pump 10; wherein, the inlet of the sewage reflux pump 10 is connected with the outlet of the aerobic tank, and the outlet of the sewage reflux pump 10 is connected with the anoxic tank of the anoxic biological reaction device 5;

the data monitoring device 2 also comprises an anoxic tank effluent total nitrogen monitoring device (not shown in the figure) for monitoring the concentration of effluent total nitrogen in the anoxic tank;

the data processing model submodule 1011 is used for obtaining feedforward sewage reflux ratio data according to the total nitrogen concentration of inlet water and obtaining feedback sewage reflux ratio data according to the total nitrogen concentration of outlet water in the anoxic tank;

the control decision sub-module 1012 is used for obtaining a feedforward operation parameter of the sewage reflux pump according to the feedforward sewage reflux ratio data and determining a feedforward adjustment instruction according to the feedforward operation parameter of the sewage reflux pump; and obtaining feedback operation parameters of the sewage reflux pump according to the feedback sewage reflux ratio data, and determining a feedback regulation instruction according to the feedback operation parameters of the sewage reflux pump.

In the embodiment of the invention, in the oil refining sewage treatment process, after the oil refining sewage is treated by the aerobic biological reaction device 6, the central control device 1 obtains feedback sewage reflux ratio data according to the total nitrogen concentration of effluent in the anoxic tank, which is acquired by the data monitoring device 2. When the feedback sewage reflux ratio is lower or higher, the control decision submodule 1012 obtains the feedback operation parameter of the sewage reflux pump 10 according to the feedback sewage reflux ratio data, so as to send a feedback adjustment instruction, automatically increase or decrease the operation power of the sewage reflux pump 10, and adjust the sewage reflux ratio of the aerobic tank to a preset sewage reflux ratio range.

In an embodiment of the present invention, the feedforward amount to be adjusted may include: feed-forward carbon source adding amount parameter data in the anoxic tank, feed-forward alkali adding amount parameter data in the aerobic tank, feed-forward aeration amount parameter data in the aerobic tank and feed-forward sewage reflux ratio data; the feedback quantity to be adjusted may include: feeding back carbon source adding amount parameter data in the anoxic tank, feeding back alkali adding amount parameter data in the aerobic tank, feeding back aeration amount parameter data in the aerobic tank and feeding back sewage reflux ratio data. Of course, the feed-forward amount to be adjusted may also include feed-forward dosage parameter data of other chemicals based on the sewage treatment system, and likewise, the feedback amount to be adjusted may also include feedback dosage parameter data of other chemicals.

In the embodiment of the invention, the total nitrogen concentration monitoring device of the anoxic tank for detecting the total nitrogen concentration in the anoxic tank and the total nitrogen monitoring device of the anoxic tank for monitoring the total nitrogen concentration of the effluent in the anoxic tank can be the same nitrogen concentration detection device, and certainly, the total nitrogen monitoring device of the effluent in the anoxic tank can also be two different nitrogen concentration detection devices which are respectively arranged.

In one embodiment, the sewage treatment device of the sewage treatment system further comprises a sludge return pump 11 and a sludge discharge pump 12;

the inlet of the sludge reflux pump 11 is connected with the bottom sludge discharge port of the sedimentation device 7, and the outlet of the sludge reflux pump 11 is connected with the aerobic tank of the aerobic biological reaction device;

the inlet of the sludge discharge pump 12 is connected with the bottom sludge discharge port of the sedimentation device 7;

the data monitoring device 2 comprises an aerobic tank sludge concentration monitoring device (not shown in the figure), a return sludge concentration monitoring device (not shown in the figure) and a sludge flow monitoring device (not shown in the figure);

the aerobic tank sludge concentration monitoring device (not shown in the figure) is used for monitoring the sludge concentration of the aerobic tank;

a returned sludge concentration monitoring device (not shown in the figure) for monitoring the returned sludge concentration of the sludge return pump 11;

the sludge flow monitoring device is used for monitoring the amount of the sludge discharged from the sedimentation device 7;

the data processing model submodule 1011 is used for calculating sludge age data according to the sludge concentration of the aerobic tank, the tank capacity of the aerobic tank, the amount of sludge discharged from the sedimentation device 7 and the return sludge concentration of the sludge return pump 11;

the control decision sub-module 1012 is configured to obtain an operation parameter of the sludge efflux pump 12 according to the sludge age data, and determine a sludge efflux pump adjustment instruction according to the operation parameter of the sludge efflux pump 12.

In an embodiment, the control decision sub-module 1012 is further configured to obtain an operation parameter of the sludge recirculation pump 11 according to the sludge concentration of the aerobic tank, and determine a sludge recirculation pump adjustment instruction according to the operation parameter of the sludge recirculation pump 11.

In the embodiment of the present invention, the calculation process of calculating the sludge age data by the data processing model sub-module 1011 can refer to the detailed description in the prior art, and in the embodiment of the present invention, the manner of calculating the sludge age data is not specifically limited, as long as the sludge age data can be obtained.

In the embodiment of the invention, in the oil refining sewage treatment process, when the oil refining sewage passes through the central control device 1 of the aerobic biological reaction device 6, the sludge age of the aerobic pool is calculated according to the sludge concentration of the aerobic pool, the discharged sludge amount of the sedimentation device 7, the pool capacity of the aerobic pool and the returned sludge concentration of the sludge return pump 11, which are acquired by the data monitoring device 2. And obtaining the operating parameters of the sludge discharge pump 12 according to the sludge age of the sludge, so as to send an adjusting instruction, automatically increase or reduce the operating power of the sludge discharge pump 12, realize the size control of the sludge discharge amount of the sedimentation device 7, and adjust the sludge amount of the sedimentation device to a preset sludge amount range. And moreover, the operation parameters of the sludge reflux pump 11 can be obtained according to the concentration of the reflux sludge, an adjusting instruction is determined according to the operation parameters of the sludge reflux pump 11, the operation power of the sludge reflux pump 11 is automatically increased or reduced, and the sludge amount of the aerobic tank is adjusted to a reasonable sludge amount range.

In the embodiment of the present invention, referring to fig. 1, the settling device 7 of the sludge treatment system further includes a sludge discharge valve (not shown in the figure), and the control decision sub-module 1012 is further configured to compare the sludge age data with a preset sludge age threshold to obtain a to-be-adjusted opening parameter of the sludge discharge valve, and determine a feedback adjustment instruction according to the to-be-adjusted opening parameter of the sludge discharge valve.

In one embodiment, the sewage homogenizing device 3 of the sewage treatment system includes a water inlet accident drain valve (not shown in the figure) connected to the accident buffering device, and the control decision sub-module 1012 is further configured to determine whether at least one of a total nitrogen concentration of inlet water, a COD concentration of inlet water, and an ammonia nitrogen concentration of inlet water of the sewage homogenizing device is greater than a preset threshold of water quality of inlet water, and if so, send an opening instruction to the water inlet accident drain valve.

In a specific embodiment, the analysis calculation module 101 of the central control apparatus 1 further includes: an early warning module (not shown in the figures);

and the control decision sub-module 1012 is further configured to send an early warning instruction to the early warning module when at least one of the total nitrogen concentration of the intake water, the COD concentration of the intake water, and the ammonia nitrogen concentration of the intake water of the sewage homogenizing device is greater than a preset threshold of the quality of the intake water.

In one embodiment, the data monitoring device 2 of the sewage treatment system further comprises a homogenizing tank water inlet flow monitoring device (not shown in the figure) and a homogenizing tank liquid level monitoring device (not shown in the figure);

the homogenizing pool water inlet flow monitoring device is used for monitoring water inlet flow data of the sewage homogenizing device 3;

the homogenizing tank liquid level monitoring device is used for monitoring the water inlet liquid level data of the sewage homogenizing device 3;

the control decision sub-module 1012 is further configured to determine whether the water inlet flow data of the sewage homogenizing device 3 is greater than a preset water inlet flow threshold, or whether the water inlet liquid level data of the sewage homogenizing device 3 is greater than a preset water inlet liquid level threshold, and if so, send an opening instruction to the water inlet accident drain valve.

In an embodiment, the control decision sub-module 1012 is further configured to send an early warning instruction to the early warning module when the water inlet flow data of the sewage homogenizing device 3 is greater than the preset water inlet flow threshold, or the water inlet liquid level data of the sewage homogenizing device 3 is greater than the preset water inlet liquid level threshold.

In the embodiment of the invention, when oil refining sewage enters the sewage homogenizing device 3, the data monitoring device 2 can collect the water quality data, the water flow data and the water level data of the sewage entering the sewage homogenizing device 3, if the control decision submodule 1012 of the central control device 1 analyzes according to any one of the collected water quality data, the flow data and the liquid level data of the sewage, and when one index of the water quality data, the water flow data and the water level data exceeds a preset threshold value, a starting instruction is sent to the water inlet accident drain valve, and the water inlet accident drain valve is opened, so that the sewage in the sewage homogenizing device 3 is introduced into the accident buffer device 9.

At the moment, the sewage treatment system enters an accident mode, the sewage treatment system can be controlled in a manual mode in the accident mode, and the operation parameters of all controlled equipment are manually adjusted by technicians. Of course, in the accident mode, the data monitoring device 2 can also continue to work to collect the water inlet characteristic parameter data of each sewage treatment device and the water quality state parameter data in the pool, so that technicians can adjust the controlled equipment according to the actual sewage treatment state.

In one embodiment, the monitoring drain 8 of the wastewater treatment system includes a water discharge valve (not shown); the water outlet accident drain valve is connected with the accident buffering device 9;

the data monitoring device also comprises a water outlet total nitrogen concentration monitoring device (not shown in the figure), a water outlet COD concentration monitoring device (not shown in the figure) and a water outlet ammonia nitrogen concentration monitoring device (not shown in the figure);

and the control decision sub-module 1012 is further configured to determine whether at least one of the total nitrogen concentration of the effluent, the COD concentration of the effluent, and the ammonia nitrogen concentration of the effluent of the monitoring discharge device is greater than a preset threshold of the effluent quality, and if so, send an opening instruction to the discharge valve of the effluent accident.

In a specific embodiment, the control decision sub-module 1012 is further configured to send an early warning instruction to the early warning module when at least one of the total effluent nitrogen concentration, the effluent COD concentration, and the effluent ammonia nitrogen concentration of the monitored discharge device is greater than a preset effluent quality threshold.

In one embodiment, the data monitoring device 2 further comprises a drain pool effluent flow monitoring device (not shown) and a drain pool liquid level monitoring device (not shown);

the discharge pool water outlet flow monitoring device is used for monitoring and monitoring water outlet flow data of the discharge device 8;

the liquid level monitoring device of the discharging pool is used for monitoring and monitoring the effluent liquid level data of the discharging device 8;

the control decision sub-module 1012 is further configured to determine whether the water flow data is greater than a preset water outlet flow threshold, or whether the water outlet liquid level data is greater than a preset water outlet liquid level threshold, and if so, send an opening instruction to the water outlet emergency drain valve.

In one embodiment, the control decision sub-module 1012 is further configured to send an early warning instruction to the early warning module when the effluent flow data of the monitoring discharge device is greater than the effluent flow preset threshold, or when the effluent liquid level data of the monitoring discharge device is greater than the effluent liquid level preset threshold.

In the embodiment of the present invention, referring to fig. 1, the monitoring and discharging device 8 of the sludge treatment system further includes a standard water discharge valve (not shown in the figure), and the control decision sub-module 1012 is further configured to obtain an opening parameter to be adjusted of the standard water discharge valve according to the water discharge data of the monitoring and discharging device 8 and the water level data of the monitoring and discharging device 8, and determine a feedback adjustment instruction according to the opening parameter to be adjusted of the standard water discharge valve.

In the embodiment of the present invention, when the oil refining wastewater enters the monitoring and discharging device 8, the data monitoring device 2 may collect the effluent water quality data, the effluent water flow data, and the effluent water level data entering the monitoring and discharging device 8, if the data processing model sub-module 1011 of the central control device 1 analyzes any one of the collected effluent water quality data, the collected effluent water flow data, and the collected effluent water level data, and when it is determined that any one of the effluent water quality data, the effluent water flow data, and the effluent water level data exceeds a preset threshold, the control decision sub-module 1012 sends an opening instruction to the effluent accident drain valve, and the effluent accident drain valve is opened, so that the wastewater in the monitoring and discharging device 8 is introduced into the accident buffering device 9. At the moment, the sewage treatment system also enters an accident mode, the running mode of each controlled device of the sewage treatment system can be adjusted through manual operation in the accident mode, and at the moment, the control system of the sewage treatment system only acquires the water inlet characteristic parameter data of the sewage treatment device through a data monitoring device and/or acquires the water quality state parameter data in the pool of the sewage treatment device. The manual control mode of the sewage treatment system can refer to the detailed description in the prior art, and the detailed description is omitted here. And if the water quality data, the flow data and the liquid level data are determined to be within the preset range, adjusting the opening of the standard water discharge valve to discharge the treated sewage to a sewage advanced treatment unit for advanced treatment of the sewage.

Example 2

Based on the same invention concept, the embodiment of the invention also provides a control method of the control system for the refinery sewage treatment, which comprises the following steps:

s101, collecting water inlet characteristic parameter data of a sewage homogenizing device and/or water quality state parameter data in a pool of a sewage treatment device;

s102, determining a feedforward regulating instruction for controlling the sewage treatment device according to the water inlet characteristic parameter data and/or the water quality state parameter data in the tank, and,

and S103, sending the feedforward regulation instruction and/or the feedback regulation instruction to corresponding controlled equipment of the sewage treatment device so as to control the controlled equipment to regulate the working state.

In the embodiment of the present invention, the detailed implementation process of the control method for a refinery-related sewage treatment control system may refer to the detailed description of the refinery-related sewage treatment control system in the first embodiment, and details are not repeated herein in the embodiment of the present invention. The specific implementation process of the refinery sewage treatment can refer to the related specific implementation manner in the prior art, and in the embodiment of the invention, the detailed description is omitted here.

Example 3

Based on the same invention concept, the embodiment of the invention also provides a refinery sewage treatment system, which comprises: the control system for the treatment of refinery-related waste water described in example 1 above.

In the embodiment of the present invention, the detailed description of the control system for treating refinery-related sewage in embodiment 1 can be referred to for the specific implementation manner of the refinery-related sewage treatment system, and will not be repeated herein in the embodiment of the present invention.

In the embodiment of the present invention, the specific implementation process of the sewage treatment system for oil refining sewage treatment may refer to a related specific implementation manner in the prior art, and details are not described herein in the embodiment of the present invention.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A control system for refining sewage treatment is applied to a sewage treatment system, and the sewage treatment system comprises a sewage homogenizing device and at least one of the following sewage treatment devices: the anaerobic biological reaction device, the anoxic biological reaction device, the aerobic biological reaction device, the sedimentation device, the monitoring discharge device and the accident buffering device are characterized in that the control system comprises a central control device and a data monitoring device;

2. The refinery-based sewage treatment control system of claim 1, wherein the central control unit comprises a communication module and an analysis and calculation module;

3. The refinery-based sewage treatment control system of claim 2, wherein the analytical computation module comprises a data processing model submodule and a control decision submodule;

the data processing model submodule is used for obtaining a feedforward quantity to be adjusted in the sewage treatment device in a preset activated sludge model according to the water inlet characteristic parameter data and/or the water quality state parameter data in the pool and sending the feedforward quantity to the control decision submodule, and obtaining a feedback quantity to be adjusted in the sewage treatment device in the activated sludge model according to the water quality state parameter data in the pool;

4. The refinery-based sewage treatment control system of claim 3, wherein the influent water quality data comprises influent total nitrogen concentration, influent COD concentration and influent ammonia nitrogen concentration;

the water inlet total nitrogen concentration monitoring device is used for monitoring the water inlet total nitrogen concentration of the sewage homogenizing device;

5. The refinery-based sewage treatment control system of claim 4, wherein the anoxic biological reaction unit comprises an anoxic tank and a carbon source adding device;

6. The refinery-based sewage treatment control system of claim 5, wherein the data monitoring devices comprise an anoxic tank total nitrogen concentration monitoring device and an anoxic tank COD concentration monitoring device; the oxygen-poor tank total nitrogen concentration monitoring device is used for monitoring the total nitrogen concentration in the oxygen-poor tank; the COD concentration monitoring device is used for monitoring the COD concentration in the anoxic tank;

7. The control system for the treatment of refining wastewater according to claim 4, wherein the aerobic biological reaction device comprises an aerobic tank, an alkali liquor feeding device and an aeration device;

8. The refinery-based wastewater treatment control system of claim 7, wherein the data monitoring devices further comprise a pH monitoring device and a dissolved oxygen monitoring device; the pH monitoring device is used for monitoring pH value data in the aerobic tank; the dissolved oxygen monitoring device is used for monitoring dissolved oxygen data in the aerobic tank;

the control decision sub-module is further configured to obtain feedback operation parameters of the alkali liquor adding equipment according to the feedback alkali adding amount parameter data and current operation parameters of the alkali liquor adding equipment, obtain feedback operation parameters of the aeration equipment according to the feedback aeration amount parameter data and the current operation parameters of the aeration equipment, and determine the feedback adjustment instruction according to the feedback operation parameters of the alkali liquor adding equipment and the feedback operation parameters of the aeration equipment.

9. A control system for refinery-based sewage treatment according to claim 8, wherein the sewage treatment plant further comprises a sewage return pump; the inlet of the sewage reflux pump is connected with the outlet of the aerobic tank, and the outlet of the sewage reflux pump is connected with the anoxic tank of the anoxic biological reaction device;

10. The control system for refining sewage treatment according to claim 9, wherein the sewage treatment plant further comprises a sludge recirculation pump and a sludge discharge pump; the inlet of the sludge reflux pump is connected with a sludge discharge port at the bottom of the sedimentation device, and the outlet of the sludge reflux pump is connected with the aerobic tank of the aerobic biological reaction device; the inlet of the sludge discharge pump is connected with the bottom sludge discharge port;

the data processing model submodule is used for calculating sludge age data according to the sludge concentration of the aerobic tank, the tank capacity of the aerobic tank, the amount of sludge discharged from the sedimentation device and the return sludge concentration of the sludge return pump;

11. The refinery-based sewage treatment control system of claim 10,

the control decision submodule is also used for obtaining the operating parameters of the sludge reflux pump according to the sludge concentration of the aerobic tank and determining the adjustment instruction of the sludge reflux pump according to the operating parameters of the sludge reflux pump.

12. The refinery sewage treatment control system of claim 4, wherein the sewage homogenizing device comprises a water inlet accident drain valve connected to the accident buffering device, and wherein the control decision submodule is further configured to determine whether at least one of a total nitrogen concentration of inlet water, a COD concentration of inlet water, and an ammonia nitrogen concentration of inlet water of the sewage homogenizing device is greater than a preset threshold of water quality of inlet water, and if so, send an opening instruction to the water inlet accident drain valve.

13. The refinery-based sewage treatment control system of claim 12, wherein the data monitoring devices further comprise a homogenizing tank influent flow monitoring device and a homogenizing tank liquid level monitoring device; the homogenizing pool water inlet flow monitoring device is used for monitoring the water inlet flow data; the homogenizing tank liquid level monitoring device is used for monitoring the water inlet liquid level data;

14. A control system for treatment of refinery-related sewage according to claim 12, wherein the monitoring and discharge means comprises a water-out accident drain valve; the water outlet accident drain valve is connected with the accident buffering device;

15. The refinery-based sewage treatment control system of claim 14, wherein the data monitoring devices further comprise a drain pool effluent flow monitoring device and a drain pool liquid level monitoring device; the discharge pool water outlet flow monitoring device is used for monitoring the water outlet flow data of the monitoring discharge device, and the discharge pool liquid level monitoring device is used for monitoring the water outlet liquid level data of the monitoring discharge device;

the control decision submodule is also used for determining whether the water outlet flow data is larger than a preset water outlet flow threshold or not, or whether the water outlet liquid level data is larger than a preset water outlet liquid level threshold or not, and if yes, sending an opening instruction to the water outlet accident drain valve.

16. The refinery-based sewage treatment control system of claim 15, wherein the analytical computation module further comprises: an early warning module;

17. A control method of a control system for refinery sewage treatment is characterized by comprising the following steps:

18. A refinery-based wastewater treatment system, comprising: a refinery-related sewage treatment control system as claimed in any one of claims 1 to 16.