CN103293196B - A kind of Automatic control system of anaerobic ammonium oxidation technology and method thereof - Google Patents

Abstract

An anaerobic ammonia oxidation process automatic control system and method thereof, the automatic control system includes a reactor body, a flow monitoring device, an automatic flow regulating valve, a data acquisition and analysis regulator with a control panel, and a water inlet conductivity probe and the water outlet conductivity probe, the flow automatic regulating valve is connected with the reactor body through the flow monitoring device; the data acquisition and analysis regulator is respectively connected with the flow monitoring device, the flow automatic regulating valve, and the water inlet and outlet conductivity probe; The method, the steps are as follows: 1) The conductivity at the water inlet and outlet is the input variable, the inflow flow is the controlled variable, the difference between the inflow and outflow conductivity Δκ is the target value, and the upper and lower limits of Δκ are set on the control panel; 2) Δκ Increase the water flow when it is greater than the upper limit; decrease the water flow when Δκ is less than the lower limit. The beneficial effects of the invention include: on-line automatic monitoring of the process; timely regulation and avoiding the overload operation of the process; simple operation and easy construction.

Description

An anaerobic ammonium oxidation process automatic control system and method thereof

technical field

The invention relates to an automatic control system and method for an anaerobic ammonium oxidation process.

Background technique

Anaerobic ammonium oxidation is a new biological nitrogen removal process, which can reduce nitrite to nitrogen under anaerobic conditions with ammonia as an electron donor, and realize the simultaneous removal of two nitrogen pollutants. Compared with the traditional biological denitrification process, anaerobic ammonium oxidation has the advantages of good denitrification effect, no need for oxygen and external organic carbon source, low operating cost, etc., and has broad prospects for industrial application. However, the fluctuation of pollutant concentration in actual wastewater and the presence of inhibitory substances such as heavy metals have become obstacles to the long-term efficient and stable operation of the anammox process. The determination steps of indicators such as ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are relatively cumbersome, and the operation status of the anammox process cannot be fed back in time. In addition, the nitrite online sensor is still in the development stage, and the nitrite online monitoring system is complicated and difficult to promote. If the anammox inhibition problem occurs and cannot be detected in time, and then effective measures are taken to regulate the process, the operation performance of the anammox process will decline, and it will take a long time to recover after the process is disturbed. On the contrary, if the nitrogen removal performance of the anammox process is good without increasing the influent load, the potential of the anammox process cannot be tapped. Therefore, it is particularly necessary to realize the on-line monitoring and automatic control of the anammox process.

According to the anaerobic ammonium oxidation reaction formula, for every mole of ammonia nitrogen removed, about 2.19 moles of ions are consumed, so that the conductivity of the anaerobic ammonium oxidation effluent is smaller than that of the influent water. Therefore, the change in the conductivity of the influent and effluent water can effectively indicate the progress of the anammox reaction and the saturation of the reactor load.

Contents of the invention

In order to effectively solve the problems of difficult real-time control and poor stability of the current anammox process, the present invention proposes an anammox process automatic control system and its method. On-line monitoring of the anammox process, and timely adjustment and control of the working conditions of the anammox process, so as to realize the long-term efficient and stable operation of the anammox process.

An anaerobic ammonium oxidation process automatic control system according to the present invention is characterized in that the system includes a reactor body, a flow monitoring device, an automatic flow regulating valve, a data acquisition and analysis regulator with a control panel, and a water inlet conductance rate probe and water outlet conductivity probe; the flow automatic regulating valve is connected to the reactor body through the flow monitoring device; the water inlet conductivity probe and the water outlet conductivity probe are respectively placed in the The water inlet and the water outlet; the data acquisition and analysis controller is respectively connected with the flow monitoring device, the automatic flow control valve, the conductivity probe of the water inlet and the conductivity probe of the water outlet.

Utilize the method that the automatic control system of the present invention adopts, the steps are as follows:

1) Turn on the data acquisition and analysis regulator, take the conductivity at the water inlet and outlet as the input variable, the inflow flow as the controlled variable, and take the difference between the inflow and outflow conductivity Δκ as the target value, and set it on the control panel of the data acquisition and analysis controller Set the upper and lower limits of Δκ;

2) The data acquisition and analysis controller controls the water inlet conductance probe and the water outlet conductance probe to start working, and compares the real-time detected Δκ with the upper and lower limits of Δκ set in step 1). If the real-time detected Δκ is greater than the upper limit, The data acquisition and analysis regulator controls the automatic flow regulating valve to automatically increase the influent flow; if Δκ is less than the lower limit value, the automatic flow regulating valve automatically reduces the influent flow.

The beneficial effects of the present invention are: ①The on-line monitoring of the anammox process can be realized conveniently and quickly by measuring the electrical conductivity; Long-term efficient and stable operation of the process; ③The automatic control system is simple to operate and easy to build.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention (the arrow represents the direction of water flow).

detailed description

Further illustrate the present invention below in conjunction with accompanying drawing

Referring to the attached picture:

Embodiment 1 An anammox process automatic control system described in the present invention includes a reactor body 1, a flow monitoring device 2, an automatic flow regulating valve 3, a data acquisition and analysis controller 4 with a control panel, and a water inlet conductance The rate probe 5 and the water outlet conductivity probe 6; the flow automatic regulating valve 3 is connected to the described reactor body 1 through the flow monitoring device 2; the water inlet conductivity probe 5 and the water outlet conductivity The rate probe 6 is placed at the water inlet 11 and the water outlet 12 of the reactor body 1 respectively; The conductivity probe 4 is connected to the water outlet conductivity probe 5 .

Embodiment 2 utilizes the method that the automatic control system described in embodiment 1 adopts, and the steps are as follows:

1) Turn on the data acquisition and analysis regulator, take the conductivity at the water inlet and outlet as the input variable, the inflow flow as the controlled variable, and take Δκ as the target value, and set the upper and lower limits of Δκ on the control panel of the data acquisition and analysis regulator;

2) The data acquisition and analysis controller controls the water inlet conductance probe and the water outlet conductance probe to start working, and compares the real-time detected Δκ with the upper and lower limits of Δκ set in step 1). If the real-time detected Δκ is greater than the upper limit, The data acquisition and analysis regulator controls the automatic flow regulating valve to automatically increase the influent flow; if Δκ is less than the lower limit value, the automatic flow regulating valve automatically reduces the influent flow.

The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also extends to the field Equivalent technical means that the skilled person can think of based on the concept of the present invention.

Claims (1)

1. An anaerobic ammonium oxidation process automatic control system, the system includes a reactor body, a flow monitoring device, an automatic flow regulating valve, a data acquisition and analysis controller with a control panel, a water inlet conductivity probe and a water outlet conductivity Probe; the automatic flow regulating valve is connected to the reactor body through the flow monitoring device; the conductivity probe of the water inlet and the conductivity probe of the water outlet are respectively placed at the water inlet of the reactor body and the water outlet; the data collection and analysis controller is respectively connected with the flow monitoring device, the flow automatic regulating valve, the water inlet conductivity probe and the water outlet conductivity probe, and it is characterized in that: using the automatic control The method adopted by the system, the steps are as follows: 1) Turn on the data acquisition and analysis regulator, take the conductivity at the water inlet and outlet as the input variable, the inflow flow rate as the controlled variable, and take the difference between the inflow and outflow conductivity Δκ as the target value, and set it on the control panel of the data acquisition and analysis controller Set the upper and lower limits of Δκ; 2) The data acquisition and analysis controller controls the water inlet conductivity probe and the water outlet conductivity probe to start working, and compares the real-time detected Δκ with the upper and lower limits of Δκ set in step 1), if the real-time detected Δκ is greater than the upper limit value, the data acquisition and analysis controller controls the automatic flow regulating valve to automatically increase the water flow; if Δκ is less than the lower limit value, the automatic flow regulating valve automatically reduces the water flow.