CN101786675A - Device and method for separating multi-parameter wastewater sources - Google Patents

Abstract

The invention discloses a device and a method for separating multi-parameter wastewater sources, belonging to the technical field of sewage treatment and environmental engineering. Multi-parameter multilevel variance analysis and logical operation are used for determining the wastewater attribute by relying on real-time detection results of multiple rather than single water quality indexes, and automatic source separation is carried out on the wastewater with different attributes by a separating device. The separating device consists of an induction unit, a control unit and a multi-channel separator. The device can rapidly response the data collected by multiple sensors, a microprocessor in the control unit can call an organizational program, calculates and judges the collected data according to a set logical value, and converts digital signals into electrical signals, thus controlling the on and off of a drainage valve, and realizing the separation of wastewater sources with multiple index parameters and multiple drainage channels. The device in the invention has the advantages of rapid detection, high precision, good control effect and the like, and is applicable to separating the various complicated sources of wastewater the water quality of which changes along with time.

Description

A multi-parameter wastewater source separation device and method

technical field

The invention belongs to the technical field of sewage treatment and environmental engineering, and in particular relates to a multi-parameter waste water source separation device and method.

Background technique

my country's water-source water shortage and water-quality water shortage are intensifying, and it is an inevitable trend to improve wastewater treatment efficiency and reuse rate. The classified discharge, collection and treatment of wastewater can improve terminal treatment efficiency, reduce operating costs, and provide favorable conditions for advanced wastewater treatment and reuse. Wastewater source separation, classified treatment, and quality reuse complement each other. The better the source separation effect, the higher the efficiency of classification and treatment, and the higher the resource reuse rate. However, most of the industry currently lacks complete and standardized wastewater source separation facilities. Even if there are different discharge pipelines, there is still a lack of automation equipment and universal methods for effective control and work. The existing wastewater classification methods are only for wastewater with relatively simple water quality components, and usually only one classification index is selected. This type of classification method is difficult to cope with the high-precision source separation of large-scale industrial wastewater with complex water quality.

In view of the above situation, the present invention is proposed, and its purpose is to provide a method to determine the attributes of complex wastewater by relying on various water quality parameters, and realize the source separation of wastewater with different attributes through a source separation device, so as to facilitate the improvement of wastewater treatment efficiency, save energy, and improve wastewater recycling. utilization rate.

Contents of the invention

The purpose of the present invention is to provide a multi-parameter waste water source separation device and method.

A multi-parameter wastewater source separation device, characterized in that: the multi-parameter wastewater source separation device includes three parts: an induction unit, a control unit and a multi-channel separator, the induction unit is placed in the wastewater to be separated, and the induction unit and the multi-channel separator All are connected to the control unit, in which the multi-channel separator is a device with water inlet at one end and water outlet at multiple ends. The water inlet receives the waste water to be separated, and different water outlets discharge waste water with different properties, and each water outlet is equipped with a control valve. , The opening and closing of the valve are controlled by the control unit.

The control unit is a programmable microprocessor, and the programmable microprocessor performs mathematical and logical operations on the water quality data provided by the sensing unit in real time to determine the category attribute of the wastewater to be separated.

A bypass pipe is arranged on the water inlet pipe of the multi-channel separator, a bypass pipe control valve is arranged on the bypass pipe, and a sensing unit is arranged on the bypass pipe.

The sensing unit is a group of online detectors.

The online detector includes: a total dissolved solids concentration detector, a conductivity meter, a temperature meter, a pH value detector, a turbidity meter, a colorimeter, and an organic pollutant concentration detector.

A multi-parameter wastewater source separation method, characterized in that multiple water quality indicators are comprehensively considered, a multi-parameter multi-level variance calculation method combined with logic calculation is used to judge the properties of the waste water, and the waste water with different properties is controlled to be separated by a source separation device.

The method steps are as follows:

First design the separation scheme: according to the characteristics of wastewater quality and the treatment methods and requirements of various pollutants, select multiple water quality indicators, divide each water quality indicator into several levels according to the set limit value, and pass the impact of the index level on the set system. Variance analysis, get the list of response values, specify the level of water quality indicators, logically group each response value through logical operations, each group represents a wastewater attribute, and the wastewater of different attributes is separated through different channels of the source separation device;

Then program the separation scheme and store it in the microprocessor;

Then the water quality index data detected by each sensor is collected through the data acquisition unit, and the microprocessor regularly calculates and judges the sampled data according to the set logic value, and converts the digital signal into an electrical signal, thereby controlling the opening and closing of the drainage valve. Control the waste water with different attributes to enter different channels, and realize the source separation of waste water with multi-parameters and multi-discharge channels.

The water quality indicators include: total dissolved solids concentration (TDS), conductivity, temperature, pH value, turbidity, chromaticity, concentration of organic pollutants (such as COD _Cr ) and the like.

The beneficial effects of the present invention are as follows: the present invention provides a method to determine the attributes of complex wastewater by relying on various water quality parameters, and realize the source separation of wastewater with different attributes through the source separation device, which is convenient for improving wastewater treatment efficiency, saving energy, and improving wastewater reuse rate .

The device is suitable for the source separation of various types of wastewater that is large-scale, intermittent, and has a wide range of water quality changes.

The device and method have a high degree of automation. Through online monitoring of various water quality indicators, the controller performs mathematical and logical analysis operations, and controls the multi-channel separator to separate waste water with different attributes according to the calculation results. The method and device can also be used in other liquid substance separation processes.

Description of drawings

Figure 1 is a schematic diagram of a two-parameter three-channel wastewater source separator;

Fig. 2 is the schematic diagram of the control system of the source separator;

Fig. 3 logic calculation and control flow chart of two-parameter three-channel monitoring system;

Fig. 4 is a logical operation design scheme diagram of two-parameter three-channel waste water source separation;

Labels in the figure: 1-induction unit; 2-control unit; 3-multi-channel separator; 4-water outlet of multi-channel separator; 5-control valve of water outlet of multi-channel separator; 6-side pipe; 7-side Pipe control valve; 8- multi-channel separator inlet pipe.

Detailed ways

The present invention provides a multi-parameter wastewater source separation device and method. The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1

The technical solution to achieve multiple water quality indicators to control wastewater classification is to set various water quality indicators (parameters) at different levels according to their impact on external systems. For example, there are water quality indicators (factors) A and B, which affect the terminal treatment system. The influence (response value) of the effect is different, if A is larger, then set the response value A>B of the two. According to the needs, divide the value range of each index into several segments (levels). Taking two indexes and three levels as an example, the value of A index is divided into three levels according to the limit values of two indexes (A ₁ and A ₂ ). C _A ≥ A ₂ , C _{A < A} 1 , A 2 > C _A ≥ A ₁ (A ₂ > A ₁ ); similarly, the B index value is also divided into three levels, C _B ≥ B ₂ , C _B < B ₁ , B ₂ >C _B ≥B ₁ (B ₂ >B ₁ ), so that the separation scheme can be designed through the results of variance analysis with two indicators and three levels. Program the separation scheme and store it in the microprocessor. The microprocessor regularly calculates the data obtained by sampling and converts the digital signal into an electrical signal, thereby controlling the opening and closing of the drainage valve, controlling the waste water with different attributes to enter different channels, and realizing multi-parameter , Separation of wastewater sources with multiple discharge channels.

The microprocessor can also call the set logical value according to the number of segments (number of channels), make logical judgments, obtain processing results, and guide and control the separation of waste water. During the working process of the device, the data detected by each sensor is collected by the data acquisition unit, and the sampling values falling into different levels are classified and set as fixed values, and then logical operations are performed according to the response level of the indicators. There are more than one programs programmed according to the response value, which are stored in the microprocessor at the same time, and are automatically called according to the variance analysis results. The microprocessor can also call logical fixed values to logically classify the response values. The number of classifications is equal to the number of discharge channels.

To achieve the above solutions, it is necessary to be equipped with a fast-response water quality detector. Currently, online monitoring instruments that can respond quickly include dissolved solids concentration (TDS) detectors, conductivity meters, temperature meters, pH detectors, turbidity meters, Colorimeter, organic pollutant concentration (such as COD _Cr ) detector, etc.; also need to be equipped with a microprocessor for programming, data operation analysis and logic operation. The multi-channel separator is used to classify and discharge the wastewater on one drainage channel to multiple drainage channels. Each channel is equipped with a solenoid valve, and the discharged wastewater must be discharged in a full pipe and homogeneous. The detector is installed on the bypass at a certain angle facing the direction of the water inlet. The bypass can be equipped with a filter and a condensation plate according to the water quality and temperature. The data sampled by the detector is sorted out by the multi-data acquisition system, input into the microprocessor for processing and displayed on the display. The processing result is displayed on the screen.

The printing and dyeing process of cotton knitting adopts the method of intermittent water intake and intermittent drainage. The water consumption is large and the water quality changes greatly. The water quality indicators for each discharge of wastewater are set to five parameters: COD _Cr , TDS, pH, turbidity and chroma. TDS is linearly related to chroma, pH is adjustable, and turbidity is linearly related to COD _Cr . Finally, two index parameters COD _Cr and TDS are selected, and each index parameter is set to three levels. For the impact of reuse, set the logic condition as COD _Cr > TDS, and the number of separation channels is 3:

Channel 1, low-concentration wastewater (low COD _Cr , low TDS) is directly reused for backwashing in production;

Channel 2, medium-concentration wastewater (low COD _Cr , high TDS) is brought into the mild wastewater treatment system and reused after treatment;

Channel 3, high-concentration wastewater (high COD _Cr , high TDS), special terminal treatment.

The source separation device for treating the above-mentioned multi-parameter wastewater, the multi-parameter wastewater source separation device includes three parts: induction unit 1, control unit 2 and multi-channel separator 3, induction unit 1 is placed in the wastewater to be separated, induction unit 1 and multi-channel separator 3 The channel separators 3 are all connected to the control unit 2, wherein the multi-channel separator is a device with water inlet at one end and water outlet at multiple ends. 4 are equipped with control valves 5, and the opening and closing of the valves are controlled by the control unit 2.

The control unit 2 is a programmable microprocessor, and the programmable microprocessor performs mathematical and logical operations on the water quality data provided by the sensing unit 1 in real time to determine the type and attribute of the wastewater to be separated.

A bypass pipe 6 is provided on the water inlet pipe 8 of the multi-channel separator 3 , a bypass pipe control valve 7 is provided on the bypass pipe, and the induction unit 1 is provided on the bypass pipe 6 .

The sensing unit 1 is a group of online detectors.

The on-line detectors are COD _Cr detectors and TDS detectors.

Fig. 1 is a schematic diagram of the system configuration of the waste water classifier of the present invention.

The above multi-parameter wastewater source separation method: comprehensively consider multiple water quality indicators, use multi-parameter multi-level variance calculation method combined with logic calculation to judge the properties of wastewater, and controllably separate the wastewater with different properties through the source separation device.

The method steps are as follows:

Firstly, the separation scheme is designed: according to the characteristics of wastewater quality and various pollutant treatment methods and requirements, two water quality indicators are selected. The water quality indicators are organic pollutant concentration COD _Cr and total dissolved solids concentration (TDS). The indicators are divided into three levels according to the set limits (COD _Cr limits are A ₁ and A ₂ , A ₂ >A ₁ , TDS limits are B ₁ and B ₂ , B ₂ >B ₁ ), through The variance analysis of the impact of the index level on the setting system obtained a list of response values. According to the results of the variance analysis, it can be known that the influence weight of COD _Cr is greater than TDS. It is stipulated that the water quality index level COD _Cr is greater than TDS, and each response value is logically grouped through logical operations. Each group represents a wastewater property, and the wastewater of different properties is separated through different channels of the source separation device;

Then program the separation scheme and store it in the microprocessor;

Then the water quality index data detected by each sensor is collected through the data acquisition unit, and the microprocessor regularly calculates and judges the sampled data according to the set logic value, and converts the digital signal into an electrical signal, thereby controlling the opening and closing of the drainage valve. Wastewater with different properties enters different channels to realize the source separation of wastewater with multiple parameters and multiple discharge channels.

Fig. 2 is a schematic diagram of control elements of a source separator, and Fig. 3 is a flow chart of the waste water control classification method and control process of the present invention. The wastewater classification control flow chart shown in Figure 3, firstly, the water quality indicators are quickly detected by the sensor probe. The selected water quality indicators can be indicators that can respond quickly, such as conductivity, TDS, temperature, pH, and turbidity. Each test action can Finished in 0.006s. According to the sampling data and the set segment limit value, the microprocessor performs calculations from the import program, and classifies the impact weight of the selected index on the external system, matches the fixed value, gives segment control instructions, and guides the separation device. Implement separation. In addition, the present invention can set the number of indicators and the number of separation channels according to needs, call the programmable software stored in the microprocessor, design programs, calculate programs, and perform data processing.

The schematic diagram related to the logical operation of the two-parameter three-channel wastewater source separation device is shown in Figure 4. After setting the limit values of the two index parameters, program various possible calculations and store them in the microprocessor, and set the logical fixed value, the microprocessor can perform logical operations on the data response value according to the logical fixed value, and get processed As a result, online control is realized.

The invention is not only suitable for the classified discharge of printing and dyeing wastewater at the source, but also suitable for the classified discharge of other arbitrary wastewater. The source separation device can not only adjust the number of water quality indicators, but also the number of discharge channels. The index parameter design method adopted can also be used in other liquid material separation processes.

Claims (8)

1. A multi-parameter waste water source separation device, characterized in that: the multi-parameter waste water source separation device comprises three parts: induction unit (1), control unit (2) and multi-channel separator (3), induction unit (1) Placed in the wastewater to be separated, the induction unit (1) and the multi-channel separator (3) are connected to the control unit (2), wherein the multi-channel separator is a device with water inlet at one end and water outlet at multiple ends, and the water inlet receives Different water outlets (4) discharge waste water with different properties, and each water outlet (4) is equipped with a control valve (5), and the opening and closing of the valve is controlled by the control unit (2). 2. A kind of multi-parameter wastewater source separation device according to claim 1, characterized in that: the control unit (2) is a programmable microprocessor, and the programmable microprocessor provides real-time information through the sensing unit (1) Water quality data, mathematical and logical operations are performed to determine the category attributes of the wastewater to be separated. 3. A multi-parameter waste water source separation device according to claim 1, characterized in that: a side pipe (6) is set on the water inlet pipe (8) of the multi-channel separator (3), and a side pipe control is set on the side pipe The valve (7) and the induction unit (1) are arranged on the bypass pipe (6). 4. A multi-parameter waste water source separation device according to claim 1, 2 or 3, characterized in that the sensing unit (1) is a set of on-line detectors. 5. A kind of multi-parameter wastewater source separation device according to claim 4, characterized in that: said on-line detector comprises: a total dissolved solids concentration detector, a conductivity meter, a temperature meter, a pH value detector, a turbidity detector, Meter, colorimeter, organic pollutant concentration detector. 6. A multi-parameter waste water source separation method, characterized in that: comprehensively considering multiple water quality indicators, using a multi-parameter multi-level variance calculation method combined with logic calculations to judge the properties of the waste water, and controlling the waste water with different properties through the source separation device separate. 7. A kind of multi-parameter waste water source separation method according to claim 6, is characterized in that described method step is as follows: First design the separation scheme: according to the characteristics of wastewater quality and the treatment methods and requirements of various pollutants, select multiple water quality indicators, divide each water quality indicator into several levels according to the set limit value, and pass the impact of the index level on the set system. Variance analysis, get the list of response values, specify the level of water quality indicators, logically group each response value through logical operations, each group represents a wastewater attribute, and the wastewater of different attributes is separated through different channels of the source separation device; Then program the separation scheme and store it in the microprocessor; Then the water quality index data detected by each sensor is collected through the data acquisition unit, and the microprocessor regularly calculates and judges the sampled data according to the set logic value, and converts the digital signal into an electrical signal, thereby controlling the opening and closing of the drainage valve. Wastewater with different attributes enters different channels to realize the source separation of wastewater with multiple parameters and multiple discharge channels. 8. A multi-parameter wastewater source separation method according to claim 7, characterized in that: said water quality indicators include: total dissolved solids concentration, electrical conductivity, temperature, pH value, turbidity, chroma, organic pollution substance concentration.

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