Water quality detection method of water quality recycling system for wastewater containing chemical washing liquid

Abstract

The invention discloses a water quality detection method of a water quality recycling system for wastewater containing chemical washing liquid. The method comprises the following steps: establishing a relation model among effluent quality, chemical washing liquid quality and water quality value of each stage of treatment device, and establishing a relation model among the effluent quality, chemical washing liquid quality and working efficiency of each stage of treatment device; obtaining the effluent quality measured by the mass flow meter of each stage of treatment device; determining a water quality value and the working efficiency of the treatment device according to the effluent quality; the water quality value range is judged according to the water quality value, and then the corresponding electric valve is controlled to control the flow direction of water flow; according to the working efficiency of the processing device, judging whether the processing device needs operation and maintenance; the automation degree is high, the control speed is high, and the operation and maintenance work efficiency of the processing device can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a water quality detection method for a wastewater reuse system containing a chemical washing liquid. Background Art

[0002] The dirt on the compressor impeller parts of ship turbochargers is mainly diesel oil and a small amount of carbon scale. Generally, shipyards use hot water to clean such equipment. In order to avoid the wastewater from cleaning polluting the working environment, most companies choose closed cleaning, so the wastewater produced is generally collected and treated with oil waste treatment equipment. After the effluent quality meets the reuse standards, it is reused through the wastewater quality reuse system.

[0003] The existing determination of the efficiency of oil waste treatment devices is mostly carried out during the wastewater treatment process design stage. However, after a long period of operation, the actual treatment capacity of the oil waste treatment device will decrease slightly, and the operation and maintenance work of the oil waste treatment device will gradually increase. At present, the method for determining the actual treatment efficiency of oil waste treatment devices is mostly to take samples of effluent and send them to relevant inspection agencies for inspection to determine the effluent water quality, and then conduct a comprehensive evaluation based on the water quality, the experience of the operation and maintenance personnel, and regular inspections. Such inspection methods are not only cumbersome and labor-intensive, but also cannot make real-time judgments. Summary of the invention

[0004] The invention provides a water quality detection method for a wastewater reuse system containing a chemical washing liquid, so as to solve the problem of low efficiency in judging the effluent water quality in the prior art.

[0005] The present invention provides a water quality detection method for a wastewater quality recycling system containing a chemical washing liquid, wherein the wastewater quality recycling system comprises an intelligent control platform, n The stage treatment device, the fluid transition box and the clean water heating pool, the n The stage treatment device is connected to the fluid transition box, and the fluid transition box is connected to the clean water heating pool. n is a natural number; n The secondary treatment device includes a wastewater pretreatment device, a first-stage treatment device, a second-stage treatment device, and a third-stage treatment device connected in sequence. n The wastewater pretreatment device includes an automatic stirrer; the automatic stirrer, the first stage treatment device, the second stage treatment device, and the third stage treatment device. n The stage treatment device and the clean water heating pool are respectively provided with mass flow meters, and both ends of the mass flow meters are provided with electric valves; The method comprises the following steps: Step 1: The intelligent control platform establishes a relationship model between the effluent quality, chemical washing liquid quality and water quality value of each level of treatment device, and establishes a relationship model between the effluent quality, chemical washing liquid quality and working efficiency of each level of treatment device; Step 2: The intelligent control platform obtains the effluent quality measured by the mass flow meters of the treatment devices at each level; Step 3, the intelligent control platform determines the water quality value according to the effluent quality through the relationship model between the effluent quality, the chemical washing liquid quality and the water quality value, and determines the working efficiency of the treatment device through the relationship model between the effluent quality, the chemical washing liquid quality and the working efficiency of the treatment device; Step 4: The intelligent control platform determines the water quality value range according to the water quality value, and then controls the corresponding electric valve to control the direction of water flow; if the water quality value reaches the qualified water quality value for reuse, the fluid in the fluid transition box is directed to the clean water heating tank; if the water quality value does not reach the qualified water quality value for reuse but reaches the effluent water quality value of a certain level of treatment device, the corresponding electric valve is opened to allow the wastewater to flow to the subsequent level of treatment device to continue wastewater treatment until the reuse water quality value is reached; based on the working efficiency of the treatment device, it is determined whether the treatment device needs to be operated and maintained.

[0006] Furthermore, the mass flow meter is installed in an inverted manner.

[0007] Furthermore, in step 1, the relationship model between the effluent quality of each level of treatment device, the quality of chemical washing liquid and the water quality value is established, including: No. n The relationship model between the water quality value of the stage treatment device, the quality of the chemical wash liquid and the effluent quality is: ;

[0008] in, Q n+2 For the n Water quality values ​​of the secondary treatment device, M 1 For the quality of clean water, M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

[0009] Furthermore, in step 1, a relationship model between the effluent quality of each level of treatment device, the quality of the chemical wash solution and the working efficiency of the treatment device is established, including: No. n The relationship model between the effluent quality of the stage treatment device, the quality of the chemical wash liquid and the working efficiency of the treatment device is: ;

[0010] in, η n+2 For the n The efficiency of the processing device, M n+1 For the n The effluent quality of the first-stage treatment device is M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

[0011] Furthermore, in step 1, a relationship model between the effluent quality of each level of treatment device, the quality of the chemical wash solution and the working efficiency of the treatment device is established, which also includes: With n The relationship model between the overall working efficiency of the wastewater reuse system of the secondary treatment device, the quality of the chemical wash liquid and the effluent quality is: ;

[0012] in, η 总 For n The overall working efficiency of the wastewater reuse system of the secondary treatment device, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

[0013] Furthermore, the n The first-stage treatment device includes a wastewater pre-treatment device, a first-stage treatment device, and a second-stage treatment device connected in sequence; The clean water heating tank is connected in sequence to the electric valve 1, the clean water mass flow meter, the electric valve 2, the closed ship turbocharger cleaning device and the oily wastewater outlet pump; The wastewater pretreatment device comprises an automatic agitator, an electric valve three, a pretreatment device mass flow meter, an electric valve four and a pretreatment device water pump connected in sequence; The first-stage treatment device comprises a water-oil-solid three-phase separator, an electric valve five, a mass flow meter for the first-stage treatment device, an electric valve six and a water pump for the first-stage treatment device, which are connected in sequence; The second-stage treatment device comprises a two-core bag filter, an electric valve seven, a mass flow meter for the secondary treatment device, an electric valve eight and a water pump for the secondary treatment device, which are connected in sequence; The oil wastewater outlet water pump is connected to the automatic agitator, the pretreatment device water pump is connected to the water-oil-solid three-phase separator, the primary treatment device water pump is connected to the two-core bag filter, the secondary treatment device water pump is connected to the water-oil-solid three-phase separator through a recycling pipeline, and the secondary treatment device water pump is connected to the fluid transition box; an electric valve nine is arranged between the secondary treatment device water pump and the fluid transition box, the two-core bag filter is connected to the recycling pipeline through an electric valve ten, and an electric valve eleven is arranged on the recycling pipeline between the water-oil-solid three-phase separator and the two-core bag filter.

[0014] Furthermore, in step 1, establishing a relationship model between the effluent quality and water quality value of each level of treatment device includes: Establish the relationship model between the initial wastewater quality value and the initial wastewater quality, clean water quality and chemical washing liquid quality: ;

[0015] in, Q 2 is the initial water quality value of wastewater, M 1 For the quality of clean water, M 2 is the initial wastewater mass, θ The quality of chemical washing liquid; Establish the relationship model between the effluent quality value of the first-stage treatment device and the effluent quality of the first-stage water treatment system device, the quality of the chemical wash liquid and the quality of the purified water: ;

[0016] in, Q 3 is the effluent quality value of the first-stage treatment device, M 1 For the quality of clean water, M 3 is the effluent quality of the first-stage treatment device, θ The quality of chemical washing liquid; Establish the relationship model between the effluent quality value of the second-stage treatment device and the effluent quality of the second-stage treatment device, the quality of clean water and the quality of chemical washing liquid: ;

[0017] in, Q 4 is the effluent quality value of the second-stage treatment device, M 1 is the quality of purified water, M 4 is the effluent quality of the second-stage treatment device, θ For the quality of chemical washing liquid.

[0018] Furthermore, in step 1, a relationship model between the effluent quality of each level of treatment device and the working efficiency of the treatment device is established, including: Establish a relationship model between the working efficiency of the first-stage treatment device and the effluent quality of the first-stage treatment device, the initial wastewater quality, the chemical wash liquid quality and the purified water quality: ;

[0019] in, η 3 is the working efficiency of the first-stage processing device, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M 3 is the effluent quality of the first-stage treatment device, θ The quality of chemical washing liquid; Establish a relationship model between the working efficiency of the second-stage treatment device and the effluent quality of the second-stage treatment device, the effluent quality of the first-stage treatment device, the quality of the chemical wash liquid and the quality of the purified water: ;

[0020] in, η 4 is the working efficiency of the second-stage processing device, M 1 is the quality of purified water, M 3 is the effluent quality of the first-stage treatment device, M 4 is the effluent quality of the second-stage treatment device, θ The quality of chemical washing liquid; Establish the relationship model between the working efficiency of the entire wastewater reuse system and the effluent quality of the second-stage treatment device, the initial wastewater quality, the chemical wash liquid quality and the purified water quality: ;

[0021] in, η 总 To improve the working efficiency of the entire wastewater reuse system, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M 4 is the effluent quality of the second-stage treatment device, θ For the quality of chemical washing liquid.

[0022] Further, in step 4, when the water quality value displayed by the mass flow meter of the secondary treatment device, the water quality value and the water quality relationship model obtained by the water quality meets the reuse water quality standard value, the fluid discharged into the fluid transition box is transported to the clean water heating tank of the closed cleaning system; When the water quality value obtained by the relationship model of the effluent quality, water quality value and effluent quality displayed by the mass flow meter of the secondary treatment device does not meet the reuse water quality value, but meets the qualified effluent water quality value of the first-stage treatment device, the intelligent control platform controls the electric valve 10 and the electric valve 9 to open, and the electric valve 11 remains closed, and the water pump of the secondary treatment device discharges the fluid into the second-stage treatment device for further treatment until the qualified effluent water quality value is reached; When the water quality value obtained by the relationship model of the effluent quality, water quality value and effluent quality displayed by the mass flow meter of the secondary treatment device does not meet the qualified effluent water quality value of the first-stage treatment device, the intelligent control platform controls the electric valve eleven and the electric valve nine to open, and the electric valve ten remains closed, and the water pump of the secondary treatment device discharges the fluid into the first-stage treatment device for further treatment until the qualified effluent water quality value is reached.

[0023] The present invention has the following beneficial effects: a water quality detection method for a wastewater reuse system including a chemical washing liquid of the present invention, for a wastewater reuse system that uses only physical treatment methods for wastewater produced by a closed cleaning device, this method uses a mass flow meter to detect the quality of the wastewater produced by the treatment device in real time, and controls the direction of the fluid through an established relationship model between the quality and the effluent water quality, ensuring that the effluent water quality meets the reuse standard before being reused. This method has a high degree of automation and a fast control speed, and is different from the conventional method of determining water quality by effluent sampling, so that water quality determination is efficient and fast, and reduces manpower. In addition, this method can improve the efficiency of the operation and maintenance of the treatment device, and the quality measured by the mass flow meter is used to quantify the reuse efficiency accordingly, providing data support for the operation and maintenance personnel to judge the use of the treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is the arrangement diagram of mass flow meter in wastewater reuse system; Figure 2 It is a top view of the wastewater reuse system; Figure 3 It is a three-dimensional model diagram of the wastewater reuse system; Figure 4 is a top view of the wastewater pretreatment device; Figure 5 It is a three-dimensional model diagram of the wastewater pretreatment device; Figure 6 is a top view of the first stage processing device; Figure 7 It is a three-dimensional model diagram of the first-stage processing device; Figure 8 It is a three-dimensional model diagram of a water-oil-solid three-phase separator; Fig. 9 This is a detailed model diagram of the oil outlet part of the water-oil-solid three-phase separator; Fig.10 is a top view of the second stage processing device; Fig.11 It is a three-dimensional model diagram of the second-stage processing device; Fig.12 It is a three-dimensional model diagram of the circulating water treatment pipeline; Fig.13 This is a detailed view of the upright 3D model of the mass flow meter.

[0026] Illustrations: 1-intelligent control platform; 2-guardrail; 3-wastewater pretreatment device; 4-first-stage treatment device; 5-second-stage treatment device; 6-fluid transition box; 7-automatic agitator; 8-mass flowmeter of pretreatment device; 9-water pump of pretreatment device; 10-electric valve three; 11-electric valve four; 12-water-oil-solid three-phase separator; 13-mass flowmeter of primary treatment device; 14-water pump of primary treatment device; 15-electric valve five; 16-electric valve six; 17-peristaltic pump bracket; 18-hose; 19-peristaltic pump; 20-two-core bag filter; 21-mass flowmeter of secondary treatment device; 22-water pump of secondary treatment device; 23-electric valve seven; 24-electric valve eight; 25-electric valve nine; 26-electric valve ten; 27-electric valve eleven; 28-reuse pipeline; 29-mass flowmeter quality display screen. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions provided by the embodiments of the present invention are described in detail below in conjunction with the drawings.

[0028] The water quality detection method of the wastewater quality recycling system containing chemical washing liquid of the present invention is mainly aimed at the recycling system of the wastewater containing chemical washing liquid produced by the closed cleaning of the compressor impeller of the ship turbocharger. Since the dirt of the compressor impeller is carbon black particles and oil stains, when the closed cleaning device is clean, the composition of the wastewater includes: most of the dirt composed of diesel and carbon black particles, chemical washing liquid and clean water mixed liquid. To ensure that the produced chemical washing liquid and clean water mixed liquid only need to meet the recycling cleaning standard, the water treatment devices involved in the recycling system are all physical treatments, and no biochemical treatment is involved. Under such conditions, the present invention adopts the idea of ​​mass conservation of chemical washing liquid and clean water mixed liquid in the recycling system and the closed cleaning device to determine the recycling efficiency and water quality.

[0029] The technical points of the present invention are: first, a mass flow meter is installed behind each stage device, automatic agitator and clean water heating tank of the wastewater reuse process to ensure that it is installed inverted, and electric valves are set on both sides of the mass flow meter to help debug the mass flow meter during implementation, and the mass value is obtained after each device has completed its work within the time set by the water treatment process; secondly, a mathematical model for judging the reuse efficiency of mass and the water quality value of the effluent is constructed based on the idea of ​​mass conservation; the control system in the reuse system makes a judgment based on the actual derived water quality value and the corresponding qualified index, and controls the corresponding device, so that the reuse system can operate while meeting the critical index of the effluent water quality cleanliness.

[0030] See also Figures 1 to 13 The present invention provides a water quality detection method for a wastewater quality reuse system containing a chemical washing liquid. The wastewater quality reuse system includes an intelligent control platform 1, n The stage treatment device, the fluid transition box 6 and the clean water heating pool, n The stage treatment device is connected to the fluid transition box 6, and the fluid transition box 6 is connected to the clean water heating pool. n is a natural number; n The secondary treatment device includes a wastewater pretreatment device 3, a first-stage treatment device 4, a second-stage treatment device 5 connected in sequence, and finally a third-stage treatment device 6. n The wastewater pretreatment device 3 includes an automatic stirrer 7; the automatic stirrer 7, the first stage treatment device 4, the second stage treatment device 5 until the n The stage treatment device and the clean water heating pool are respectively provided with mass flow meters, and electric valves are provided at both ends of the mass flow meters.

[0031] The present invention sets a wastewater agitator at the starting position of the wastewater reuse system to make the wastewater quality uniform and help the subsequent water treatment equipment to work; a mass flow meter is added after each level of treatment device, automatic agitator and clean water heating tank, and electric valves are set on both sides of the mass flow meter, and the mass flow meter is installed inverted to measure the mass of the solid-containing fluid flowing through. Since the object of the water treatment carried out by the present invention is a fluid containing carbon black solids and diesel, for the solid-containing fluid, the mass flow meter needs to be installed inverted to avoid the solids in the fluid from settling at the bottom of the mass flow meter when it is installed upright, resulting in inaccurate measurement. Technicians in this field can make corresponding adjustments according to the different water quality conditions of the fluid to be treated. The method includes the following steps: Step 1: The intelligent control platform 1 establishes a relationship model between the effluent quality, chemical washing liquid quality and water quality value of each level of treatment device, and establishes a relationship model between the effluent quality, chemical washing liquid quality and the working efficiency of the treatment device at each level of treatment device.

[0032] Specifically, the relationship model between the effluent quality, chemical wash liquid quality and water quality value of each level of treatment equipment is established, including: No. n The relationship model between the water quality value of the stage treatment device, the quality of the chemical wash liquid and the effluent quality is: ;

[0033] in, Q n+2 For the n Water quality values ​​of the secondary treatment device, M 1 For the quality of clean water, M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

[0034] Establish the relationship model between the effluent quality, chemical wash liquid quality and the working efficiency of each level of treatment equipment, including: No. n The relationship model between the effluent quality of the stage treatment device, the quality of the chemical wash liquid and the working efficiency of the treatment device is: ;

[0035] in, η n+2 For the n The efficiency of the processing device, M n+1 For the n The effluent quality of the first-stage treatment device is M n+2 For then The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

[0036] Establish the relationship model between the effluent quality, chemical wash liquid quality and the working efficiency of each level of treatment equipment, including: With n The relationship model between the overall working efficiency of the wastewater reuse system of the secondary treatment device, the quality of the chemical wash liquid and the effluent quality is: ;

[0037] in, η 总 For n The overall working efficiency of the wastewater reuse system of the secondary treatment device, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M n+2 For the n The quality of the water discharged from the secondary treatment device, θ For the quality of chemical washing liquid.

[0038] Step 2: The intelligent control platform 1 obtains the outlet water quality measured by the mass flow meters of the treatment devices at each level.

[0039] Step three, the intelligent control platform 1 determines the water quality value according to the effluent quality through the relationship model between the effluent quality, the chemical washing liquid quality and the water quality value, and determines the working efficiency of the treatment device through the relationship model between the effluent quality, the chemical washing liquid quality and the working efficiency of the treatment device.

[0040] Step 4, the intelligent control platform 1 determines the water quality value range according to the water quality value, and then controls the corresponding electric valve to control the direction of water flow; if the water quality value reaches the qualified water quality value for reuse, the fluid in the fluid transition box is passed to the clean water heating pool; if the water quality value does not reach the qualified water quality value for reuse but reaches the effluent water quality value of a certain level of treatment device, the corresponding electric valve is opened to allow the wastewater to flow to the subsequent level of treatment device to continue wastewater treatment until the reuse water quality value is reached; based on the working efficiency of the treatment device, it is determined whether the treatment device needs to be operated and maintained.

[0041] If the working efficiency of the treatment device meets the corresponding qualified critical working efficiency, mechanical water treatment can continue. If the working efficiency of the treatment device does not meet the corresponding qualified critical working efficiency, operation and maintenance inspection is required.

[0042] The wastewater treated by the wastewater recycling system of this embodiment is a mixture of chemical washing liquid containing diesel and carbon black particles. Therefore, the equipment in the wastewater recycling system for these two main impurities includes: a wastewater pretreatment device, a first-stage treatment device with oil-water-solid three-phase separation function, a second-stage treatment device with filtering function, an intelligent control platform, a guardrail and a fluid filter box. Therefore, the wastewater recycling system of this embodiment has a two-stage treatment device.

[0043] In this embodiment, n The first-stage treatment device specifically includes a wastewater pretreatment device 3, a first-stage treatment device 4, and a second-stage treatment device 5 connected in sequence; the clean water heating tank is connected in sequence to an electric valve 1, a clean water mass flowmeter, an electric valve 2, a closed ship turbocharger cleaning device, and an oil wastewater outlet water pump; the wastewater pretreatment device 3 includes an automatic agitator 7, an electric valve 3 10, a pretreatment device mass flowmeter 8, an electric valve 4 11, and a pretreatment device water pump 9 connected in sequence; the first-stage treatment device 4 includes a water-oil-solid three-phase separator 12, an electric valve 5 15, a first-stage treatment device mass flowmeter 13, an electric valve 6 16, and a first-stage treatment device water pump 14 connected in sequence; the second-stage treatment device 5 includes a two-core bag filter 20, an electric valve 7 2 3. Mass flow meter 21, electric valve eight 24 and water pump 22 of secondary treatment device; the oily wastewater outlet pump is connected to the automatic agitator 7, the pretreatment device water pump 9 is connected to the water-oil-solid three-phase separator 12, the primary treatment device water pump 14 is connected to the two-core bag filter 20, the secondary treatment device water pump 22 is connected to the water-oil-solid three-phase separator 12 through the recycling pipeline 28, and the secondary treatment device water pump 22 is connected to the fluid transition box 6; an electric valve nine 25 is arranged between the secondary treatment device water pump 22 and the fluid transition box 6, the two-core bag filter 20 is connected to the recycling pipeline 28 through the electric valve ten 26, and an electric valve eleven 27 is arranged on the recycling pipeline 28 between the water-oil-solid three-phase separator 12 and the two-core bag filter 20.

[0044] In order to facilitate the control of the flow direction of the reuse system fluid, in step 1, the relationship model between the effluent quality and water quality value of each level of treatment device is established, including: Establish the relationship model between the initial wastewater quality value and the initial wastewater quality, clean water quality and chemical washing liquid quality: ;

[0045] in, Q 2 is the initial water quality value of wastewater, M 1 For the quality of clean water, M 2 is the initial wastewater mass, θ The quality of chemical washing liquid; Establish the relationship model between the effluent quality value of the first-stage treatment device and the effluent quality of the first-stage water treatment system device, the quality of the chemical wash liquid and the quality of the purified water: ;

[0046] in, Q 3 is the effluent quality value of the first-stage treatment device, M 1 For the quality of clean water, M 3 is the effluent quality of the first-stage treatment device, θ The quality of chemical washing liquid; Establish the relationship model between the effluent quality value of the second-stage treatment device and the effluent quality of the second-stage treatment device, the quality of clean water and the quality of chemical washing liquid: ;

[0047] in, Q 4 is the effluent quality value of the second-stage treatment device, M 1 is the quality of purified water, M 4 is the effluent quality of the second-stage treatment device, θ For the quality of chemical washing liquid.

[0048] In order to provide data support for technicians to judge the working condition of the equipment, in step 1, a relationship model between the effluent quality of each level of treatment device and the working efficiency of the treatment device is established, including: Establish a relationship model between the working efficiency of the first-stage treatment device and the effluent quality of the first-stage treatment device, the initial wastewater quality, the chemical wash liquid quality and the purified water quality: ;

[0049] in, η 3 is the working efficiency of the first-stage processing device, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M 3 is the effluent quality of the first-stage treatment device, θ The quality of chemical washing liquid; Establish a relationship model between the working efficiency of the second-stage treatment device and the effluent quality of the second-stage treatment device, the effluent quality of the first-stage treatment device, the quality of the chemical wash liquid and the quality of the purified water: ;

[0050] in, η 4 is the working efficiency of the second-stage processing device, M 1 is the quality of purified water, M 3 is the effluent quality of the first-stage treatment device, M 4 is the effluent quality of the second-stage treatment device, θ The quality of chemical washing liquid; Establish the relationship model between the working efficiency of the entire wastewater reuse system and the effluent quality of the second-stage treatment device, the initial wastewater quality, the chemical wash liquid quality and the purified water quality: ;

[0051] in, η 总 To improve the working efficiency of the entire wastewater reuse system, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M 4 is the effluent quality of the second-stage treatment device, θ For the quality of chemical washing liquid.

[0052] like Figure 1 Specifically, it should be noted that in actual practice, since the effluent of the water treatment device cannot be clearer than clean water, technicians in this field need to ensure that the effluent water quality value of the water treatment device cannot be higher than the water quality value of clean water, otherwise it indicates that there are problems in the setting and installation of the mass flow meter, such as failure to adjust the initial value of the mass flow meter to zero before water treatment.

[0053] The workflow of the wastewater reuse system includes the following steps: adding an agitator before the reuse water treatment device allows impurities and other sediments in the water to be evenly distributed in the liquid, avoiding the precipitation of impurities in the water and helping the subsequent water treatment equipment to work.

[0054] When the wastewater stays in the agitator for a sufficient period of time, electric valve three and electric valve four are opened at the same time, allowing the water flow to fill the pretreatment system mass flow meter. At the same time, the pretreatment system water pump starts working according to the water pressure set according to the water treatment process requirements, and sends the wastewater into the water, oil and solid three-phase separator; the quality of the effluent from the pretreatment device, that is, the quality of the initial wastewater, is measured to provide data support for the effluent quality and work efficiency judgment of the water treatment device.

[0055] When the working time of the oil, water and solid three-phase separation device is met, electric valve five and electric valve six are opened to allow the water flow to fill the mass flow meter of the primary water treatment system. At the same time, the water pump of the primary water treatment system starts working according to the water pressure set according to the water treatment process requirements, and sends the wastewater into the two-core bag filter; the quality of the effluent from the first-stage treatment device is measured to provide data support for the judgment of the effluent water quality and working efficiency of the water treatment device.

[0056] When the working time of the two-core bag filter is met, electric valve seven, electric valve eight and electric valve nine are opened at the same time, electric valve ten and electric valve eleven remain closed, and the fluid after a round of treatment enters the mass flow meter of the secondary water treatment system. The water pump of the secondary treatment system works according to the water pressure required by the process and sends all the produced water into the fluid transition box; the quality of the effluent from the entire reuse system is measured to provide data support for the judgment of the effluent quality and working efficiency of the water treatment device.

[0057] After the fluid enters the transition box, electric valve seven and electric valve eight are closed to prevent the water to be operated from flowing back to the mass flow meter of the secondary water treatment system. The intelligent control platform outputs the water quality value based on the quality data measured by all mass flow meters in the system and the relationship model between quality and water quality value, and then compares the water quality value with the standard water quality value of each pre-set treatment system. According to the comparison result, the direction of the water flow is judged. If it meets the standard value of reuse water quality, the water is transported to the clean water tank of the closed cleaning system; if it does not meet the standard value of reuse water quality, the corresponding valve is opened for secondary water treatment, and the cycle is repeated until the water quality of the system outlet water reaches the standard water quality value of reuse. The entire reuse water treatment system is intelligently upgraded, and the substandard water is re-input into the corresponding equipment for treatment at the end of the water treatment system until it reaches the standard water quality value of the reuse system.

[0058] See also Figure 2 and Figure 3 The guardrail 2 separates the wastewater pretreatment device 3, the first-stage treatment device 4, the second-stage treatment device 5 and the fluid transition box 6 from the intelligent control platform 1. The interior of the guardrail 2 is the equipment intelligent operation area, and the intelligent control platform 1 is the manual operation area.

[0059] See also Figure 4 and Figure 5 The wastewater pretreatment device 3 includes an automatic agitator 7, a pretreatment device mass flowmeter 8, a pretreatment device water pump 9, an electric valve 3 10, an electric valve 4 11, and water pipes connecting various devices. The wastewater first enters the automatic agitator 7 to be stirred; after the stirring time is reached, the electric valve 3 10 and the electric valve 4 11 are opened at the same time, so that the water flow fills the pretreatment system mass flowmeter 8, and at the same time, the pretreatment system water pump 9 starts to work according to the water pressure set by the water treatment process requirements, pressurizes the wastewater, and transports it to the first-stage water treatment device 4.

[0060] See also Figure 6 and Figure 7The first-stage treatment device 4 includes a water-oil-solid three-phase separator 12, a mass flow meter 13 for the first-stage treatment device, a water pump 14 for the first-stage treatment device, an electric valve 5 15, an electric valve 5 16, and water pipes connecting various devices. The wastewater is first transported to the water-oil-solid three-phase separator by the water pump 9 of the pre-treatment device. After the separation time is reached, the electric valve 5 15 and the electric valve 6 16 are opened at the same time, so that the wastewater fills the entire mass flow meter 13 of the first-stage treatment device. At the same time, the water pump 14 of the first-stage treatment device starts to work according to the water pressure set according to the water treatment process requirements, pressurizes the wastewater, and transports it to the secondary treatment device 5.

[0061] See also Figure 8 and Fig. 9 The upper part of the water-oil-solid three-phase separator is connected to a hose 18 for discharging oil, and the lower part is connected to a pipe for discharging solids. A peristaltic pump bracket 17 is installed on the side of the three-phase separator body, and a peristaltic pump 19 is placed on the bracket. The peristaltic pump 19 rotates and squeezes the hose, so that the oil in the hose is discharged to the oil collection tank. In addition to the function of conveying liquid, the peristaltic pump 19 also has the function of a shut-off valve. An electric valve is placed in the pipe connected at the lower part to control the discharge of solids into the solid collection box.

[0062] See also Fig.10 and Fig.11 The second-stage treatment device 5 includes a two-core bag filter 20, a secondary treatment device mass flow meter 21, a secondary treatment device water pump 22, an electric valve 7 23, an electric valve 8 24, and water pipes connecting various devices. The wastewater is first transported to the two-core bag filter by the primary treatment device water pump 14. After the filtration time is reached, the electric valve 7 23 and the electric valve 8 24 are opened at the same time, so that the wastewater fills the entire secondary treatment device mass flow meter 21. At the same time, the secondary treatment device water pump 22 pressurizes the wastewater according to the water treatment process requirements and transports all the produced fluid to the fluid transition box 6. After all the fluid is transferred to the transition box 6, the electric valve 7 23 and the electric valve 8 24 are closed to prevent the fluid from flowing back to the secondary treatment device mass flow meter 21.

[0063] Fig.12The three-dimensional model of the circulating water treatment pipeline is shown. It consists of electric valve nine 25, electric valve ten 26, electric valve eleven 27 and reuse pipeline 28. When the water quality value obtained by the relationship model of the effluent quality, water quality value and effluent quality displayed by the mass flow meter of the secondary treatment device meets the reuse water quality standard value, the fluid discharged into the fluid transition box is transported to the clean water heating pool of the closed cleaning system; when the water quality value obtained by the relationship model of the effluent quality, water quality value and effluent quality displayed by the mass flow meter 21 of the secondary treatment device does not meet the reuse water quality value, but meets the qualified water quality value of the effluent of the first-stage treatment device 4, the intelligent control platform 1 controls the electric valve ten 26 and the electric valve nine 25 to open, and the electric valve eleven 27 is kept When the secondary treatment device is closed, the water pump 22 of the secondary treatment device discharges the fluid into the second-stage treatment device 5 for further treatment until the effluent water quality reaches the qualified value; when the water quality value obtained by the effluent water quality, water quality value and the relationship model of the effluent water quality displayed by the mass flow meter 21 of the secondary treatment device does not meet the qualified effluent water quality value of the first-stage treatment device 4, the intelligent control platform 1 controls the electric valve eleven 27 and the electric valve nine 25 to open, and the electric valve ten 26 remains closed, and the water pump 22 of the secondary treatment device discharges the fluid into the first-stage treatment device 4 for further treatment until the effluent water quality reaches the qualified value.

[0064] Fig.13 The details of the three-dimensional model of the upright mass flowmeter are shown. When the mass flowmeter is upright, the mass flowmeter quality display screen 29 is located above the main body. When the mass flowmeter is inverted, the mass flowmeter quality display screen 29 is located below the main body. For the quality detection of the solid-containing fluid in this embodiment, the mass flowmeter needs to be inverted.

[0065] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0066] It should be understood that the present invention is not limited to the exact construction that has been 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 invention is limited only by the appended claims.

Claims

1. A method for detecting water quality in a wastewater reuse system containing a chemical wash solution, characterized in that: The wastewater reuse system comprises an intelligent control platform (1), n The stage treatment device, the fluid transition box (6) and the clean water heating pool, the n The stage treatment device is connected to the fluid transition box (6), and the fluid transition box (6) is connected to the clean water heating pool. n is a natural number; n The secondary treatment device comprises a wastewater pretreatment device (3), a first-stage treatment device (4), a second-stage treatment device (5), and a third-stage treatment device (6) connected in sequence. n The wastewater pretreatment device (3) comprises an automatic stirrer (7); the automatic stirrer (7), the first-stage treatment device (4), the second-stage treatment device (5) and the third-stage treatment device (6). n The stage treatment device and the clean water heating pool are respectively provided with mass flow meters, and both ends of the mass flow meters are provided with electric valves; The method comprises the following steps: Step 1: The intelligent control platform (1) establishes a relationship model between the effluent quality, chemical wash liquid quality and water quality value of each level of treatment device, and establishes a relationship model between the effluent quality, chemical wash liquid quality and working efficiency of each level of treatment device; Step 2: the intelligent control platform (1) obtains the effluent quality measured by the mass flow meters of the treatment devices at each level; Step 3, the intelligent control platform (1) determines the water quality value according to the effluent quality through a relationship model between the effluent quality, the chemical washing liquid quality and the water quality value, and determines the working efficiency of the treatment device through a relationship model between the effluent quality, the chemical washing liquid quality and the working efficiency of the treatment device; Step 4, the intelligent control platform (1) determines the water quality value range according to the water quality value, and then controls the corresponding electric valve to control the flow direction of the water; if the water quality value reaches the qualified water quality value for reuse, the fluid in the fluid transition box is directed to the clean water heating tank; if the water quality value does not reach the qualified water quality value for reuse but reaches the effluent water quality value of a certain level of treatment device, the corresponding electric valve is opened to allow the wastewater to flow to the subsequent level of treatment device to continue wastewater treatment until the reuse water quality value is reached; and based on the working efficiency of the treatment device, it is determined whether the treatment device needs to be operated and maintained.

2. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 1, characterized in that: The mass flow meter is installed in an inverted manner.

3. The water quality detection method for a wastewater reuse system containing a chemical washing liquid as claimed in claim 1, characterized in that: In step 1, the relationship model between the effluent quality, chemical wash liquid quality and water quality value of each level of treatment equipment is established, including: No. n The relationship model between the water quality value of the stage treatment device, the quality of the chemical wash liquid and the effluent quality is: ； in, Q n+2 For the n Water quality values ​​of the secondary treatment device, M 1 For the quality of clean water, M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

4. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 3, characterized in that: In step 1, a relationship model between the effluent quality of each level of treatment equipment, the quality of chemical wash liquid and the working efficiency of the treatment equipment is established, including: No. n The relationship model between the effluent quality of the stage treatment device, the quality of the chemical wash liquid and the working efficiency of the treatment device is: ； in, η n+2 For the n The efficiency of the processing device, M n+1 For the n The effluent quality of the first-stage treatment device is M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

5. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 4, characterized in that: In step 1, a relationship model between the effluent quality, chemical wash liquid quality and the working efficiency of each level of treatment device is established, which also includes: With n The relationship model between the overall working efficiency of the wastewater reuse system of the secondary treatment device, the quality of the chemical wash liquid and the effluent quality is: ； in, η 总 For n The overall working efficiency of the wastewater reuse system of the secondary treatment device, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M n+2 For the n The quality of the water discharged from the stage treatment device, θ For the quality of chemical washing liquid.

6. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 1, characterized in that: Said n The secondary treatment device comprises a wastewater pretreatment device (3), a first-stage treatment device (4), and a second-stage treatment device (5) which are connected in sequence; The clean water heating tank is connected in sequence to the electric valve 1, the clean water mass flow meter, the electric valve 2, the closed ship turbocharger cleaning device and the oily wastewater outlet pump; The wastewater pretreatment device (3) comprises an automatic stirrer (7), an electric valve three (10), a pretreatment device mass flow meter (8), an electric valve four (11) and a pretreatment device water pump (9) which are connected in sequence; The first-stage treatment device (4) comprises a water-oil-solid three-phase separator (12), an electric valve five (15), a first-stage treatment device mass flow meter (13), an electric valve six (16) and a first-stage treatment device water pump (14) which are connected in sequence; The second-stage treatment device (5) comprises a two-core bag filter (20), an electric valve seven (23), a secondary treatment device mass flow meter (21), an electric valve eight (24) and a secondary treatment device water pump (22) which are connected in sequence; The oily wastewater outlet water pump is connected to the automatic stirrer (7), the pretreatment device water pump (9) is connected to the water-oil-solid three-phase separator (12), the primary treatment device water pump (14) is connected to the two-core bag filter (20), the secondary treatment device water pump (22) is connected to the water-oil-solid three-phase separator (12) via a recycling pipeline (28), and the secondary treatment device water pump (22) is connected to the fluid transition box (6); an electric valve nine (25) is provided between the secondary treatment device water pump (22) and the fluid transition box (6), the two-core bag filter (20) is connected to the recycling pipeline (28) via an electric valve ten (26), and an electric valve eleven (27) is provided on the recycling pipeline (28) between the water-oil-solid three-phase separator (12) and the two-core bag filter (20).

7. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 6, characterized in that: In step 1, the relationship model between the effluent quality and water quality value of each level of treatment equipment is established, including: Establish the relationship model between the initial wastewater quality value and the initial wastewater quality, clean water quality and chemical washing liquid quality: ； in, Q 2 is the initial water quality value of wastewater, M 1 For the quality of clean water, M 2 is the initial wastewater mass, θ The quality of chemical washing liquid; Establish the relationship model between the effluent quality value of the first-stage treatment device and the effluent quality of the first-stage water treatment system device, the quality of the chemical wash liquid and the quality of the purified water: ； in, Q 3 is the effluent quality value of the first-stage treatment device, M 1 For the quality of clean water, M 3 is the effluent quality of the first-stage treatment device, θ The quality of chemical washing liquid; Establish the relationship model between the effluent quality value of the second-stage treatment device and the effluent quality of the second-stage treatment device, the quality of clean water and the quality of chemical washing liquid: ； in, Q 4 is the effluent quality value of the second-stage treatment device, M 1 is the quality of purified water, M 4 is the effluent quality of the second-stage treatment device, θ For the quality of chemical washing liquid.

8. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 7, characterized in that: In step 1, a relationship model between the effluent quality of each level of treatment device and the working efficiency of the treatment device is established, including: Establish a relationship model between the working efficiency of the first-stage treatment device and the effluent quality of the first-stage treatment device, the initial wastewater quality, the chemical wash liquid quality and the purified water quality: ； in, η 3 is the working efficiency of the first-stage processing device, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M 3 is the effluent quality of the first-stage treatment device, θ The quality of chemical washing liquid; Establish a relationship model between the working efficiency of the second-stage treatment device and the effluent quality of the second-stage treatment device, the effluent quality of the first-stage treatment device, the quality of the chemical wash liquid and the quality of the purified water: ； in, η 4 is the working efficiency of the second-stage processing device, M 1 is the quality of purified water, M 3 is the effluent quality of the first-stage treatment device, M 4 is the effluent quality of the second-stage treatment device, θ The quality of chemical washing liquid; Establish the relationship model between the working efficiency of the entire wastewater reuse system and the effluent quality of the second-stage treatment device, the initial wastewater quality, the chemical wash liquid quality and the purified water quality: ； in, η 总 To improve the working efficiency of the entire wastewater reuse system, M 1 is the quality of purified water, M 2 is the initial wastewater mass, M 4 is the effluent quality of the second-stage treatment device, θ For the quality of chemical washing liquid.

9. A method for detecting water quality in a wastewater reuse system containing a chemical washing liquid as claimed in claim 8, characterized in that: In step 4, when the effluent quality displayed by the mass flow meter of the secondary treatment device, the water quality value and the water quality relationship model obtained by the effluent quality meet the reuse water quality standard value, the fluid discharged into the fluid transition box is transported to the clean water heating tank of the closed cleaning system; When the water quality value obtained by the relationship model of the effluent quality, water quality value and effluent quality displayed by the mass flow meter (21) of the secondary treatment device does not meet the reuse water quality value, but meets the qualified effluent water quality value of the first-stage treatment device (4), the intelligent control platform (1) controls the electric valve ten (26) and the electric valve nine (25) to open, and the electric valve eleven (27) to remain closed, and the water pump (22) of the secondary treatment device discharges the fluid into the second-stage treatment device (5) for further treatment until the qualified effluent water quality value is reached; When the water quality value obtained by the relationship model of the outlet water quality, water quality value and outlet water quality displayed by the mass flow meter (21) of the secondary treatment device does not meet the qualified outlet water quality value of the first-stage treatment device (4), the intelligent control platform (1) controls the electric valve eleven (27) and the electric valve nine (25) to open, and the electric valve ten (26) remains closed, and the secondary treatment device water pump (22) discharges the fluid into the first-stage treatment device (4) for further treatment until the outlet water reaches the qualified outlet water quality value.

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