CN218435151U

CN218435151U - Fluorescent tracing method medicine adding device

Info

Publication number: CN218435151U
Application number: CN202222479636.1U
Authority: CN
Inventors: 张晓辉; 李松; 明朗; 张强; 李舜尧; 吴志明; 赵小曼; 陈亮
Original assignee: Beijing Polytechnic
Current assignee: Beijing Polytechnic
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-02-03
Anticipated expiration: 2032-09-19

Abstract

The utility model discloses a fluorescence tracer method charge device relates to the cooling water and adds medicine technical field, specifically is fluorescence tracer method charge device, including cooling tower, catch basin, heat exchanger and disinfect algicide solution jar, antisludging corrosion inhibitor solution jar, PLC control box, the top fixed mounting of catch basin has the top fixed mounting of cooling tower to have the catch basin, the delivery port of catch basin passes through the connecting pipe and is connected with the water inlet of heat exchanger. According to the chemical dosing device adopting the fluorescent tracing method, the conductivity and pH measuring pool and the fluorescent tracer measuring pool are connected in series at the bottom of the water collecting pool, the fluorescent tracer can detect the concentration of phosphorus in the water body, a detection signal is converted into a current signal and transmitted to the PLC control box, the current signal is used as the measurement input of the feedback controller to be compared with a set value, the deviation of the current signal is processed by a proper control algorithm and then is output as a current signal, the flow of a chemical dosing metering pump for dosing a chemical is controlled, and the precise control of the chemical dosing amount is realized.

Description

Fluorescent tracing method medicine adding device

Technical Field

The utility model relates to a cooling water adds medicine technical field, specifically is fluorescence tracer method charge device.

Background

The water system of the central air-conditioning unit is divided into a circulating cooling water system, a freezing water system and a hot water system 3. Corrosion and scaling are major problems facing the retention of water quality in circulating cooling water. At present, most of the processes adopt a chemical purification method, namely, a scale inhibitor and a corrosion inhibitor are added into a water body, so that the scaling and corrosion degrees of equipment and pipelines are relieved. Whether the two medicaments are added in proper amount or not only influences the water quality condition and the service life of equipment, but also determines the operation cost and the energy-saving and emission-reducing effects to a great extent. The dosage is insufficient, the scale inhibition-corrosion inhibition effect is not up to the requirement, and the scaling and corrosion speeds are accelerated; the excessive medicament not only increases the operating cost, but also has negative influence on the scale inhibition and corrosion inhibition effect. In order to take technical and economic operation indexes into consideration, the automatic dosing system is gradually approved by designers and owners, so that automatic dosing complete equipment is almost selected in air-conditioning water system water quality assurance measures. However, the design scheme and the corresponding configuration of the automatic dosing complete equipment are different and simple, and the core technology is how to realize proper control around the adding amount of the scale and corrosion inhibitor. The adding scheme is that an instrument for continuously and automatically detecting the concentration of the medicament in the circulating water body is adopted, and a closed loop (feedback) control system is adopted to adjust the flow of the scale and corrosion inhibitor added by a metering pump so as to keep the flow at a set value as far as possible; the purpose of reasonably adding the medicament can also be achieved by adopting an open-loop (feedforward) control system, namely the flow of adding the scale and corrosion inhibitor into the metering pump is proportionally adjusted according to the flow of the supplementary fresh water according to the optimal concentration value provided by a medicament manufacturer, and the concentration of the medicament in the water body can also be maintained.

The instrument for continuously and automatically detecting the concentration of the medicament in the water body is divided into two categories: one is an analyzer for on-line monitoring of phosphorus content, because most water quality stabilizers contain phosphorus; the other is a fluorometer, which detects the fluorescence intensity in water indirectly by linking a fluorescent group to the active ingredient of the agent. The measuring method of the fluorescent tracer comprises the steps of detecting the fluorescence intensity of the water by using an online fluorescent detector when the water quality is stable, analyzing a display value of a water sample calibration instrument on site, further automatically controlling the adding amount of the scale and corrosion inhibitor, accurately controlling the adding amount, detecting the concentration of a medicament by using the fluorescent tracer method, mostly using the fluorescent tracer method for circulating cooling water systems for large industries such as petrifaction, power stations and the like, and rarely using the fluorescent tracer method in circulating water systems of air conditioning units, so that the fluorescent tracer method dosing device is pushed out to realize accurate dosing of the circulating water systems of the air conditioning units.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a fluorescence tracer method charge device has solved the problem of proposing in the above-mentioned background art.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the chemical dosing device adopting the fluorescence tracing method comprises a cooling tower, a water collecting tank, a heat exchanger, a sterilization algicide solution tank, an antisludging corrosion inhibitor solution tank and a PLC (programmable logic controller) control box, wherein the top of the cooling tower is fixedly installed at the top of the water collecting tank, a water collecting tank is fixedly installed at the top of the water collecting tank, a water outlet of the water collecting tank is connected with a water inlet of the heat exchanger through a connecting pipe, a circulating pump is arranged on the connecting pipe between the water collecting tank and the heat exchanger, a water outlet of the heat exchanger is connected with a water inlet of the cooling tower through a connecting pipe, a pollution discharge electromagnetic valve is fixedly connected with the bottom of the water collecting tank, a water replenishing electromagnetic valve is arranged on the side surface of the water collecting tank, a conductivity and pH measuring tank and a fluorescence tracer measuring tank are fixedly communicated with the bottom of the water collecting tank, the conductivity and pH measuring tank and the fluorescence tracer measuring tank are arranged in series, the conductivity and pH measuring tank can detect the conductivity and the pH value of circulating water, the fluorescence tracer measuring tank can detect the concentration of phosphorus contained in the circulating water, dosing pumps are fixedly installed at the tops of the sterilization algicide solution tank and the antisludging corrosion inhibitor solution tank, and the dosing pumps can introduce the chemicals solution into the corrosion inhibitor in the water collecting tank.

Preferably, conductivity and pH measuring cell and PLC control box electric connection, including conductivity detector, pH value detector in conductivity and the pH measuring cell, fluorescence tracer measuring cell and PLC control box electric connection, including fluorescence tracer in the fluorescence tracer measuring cell.

Preferably, the conductivity and pH measuring pond, fluorescence tracer measuring pond bottom are provided with washes the solenoid valve, and wash solenoid valve and PLC control box electric connection, wash the solenoid valve and can receive the PLC control box control to wash inside conductivity and pH measuring pond, the fluorescence tracer measuring pond.

Preferably, the sterilization algicide solution tank and the scale and corrosion inhibitor solution tank are respectively provided with an electric remote water meter and a liquid level lower limit switch, and the electric remote water meter and the liquid level lower limit switch are electrically connected with the PLC control box.

Preferably, the water replenishing electromagnetic valve and the sewage draining electromagnetic valve are electrically connected with the PLC control box, the water replenishing electromagnetic valve can be controlled by the PLC control box to add water inside the water collecting tank, and the sewage draining electromagnetic valve can be controlled by the PLC control box to drain sewage at intervals of fixed time.

The utility model provides a fluorescence tracer method charge device possesses following beneficial effect:

1. according to the chemical dosing device adopting the fluorescent tracing method, the conductivity and pH measuring pool and the fluorescent tracer measuring pool are connected in series at the bottom of the water collecting pool, the fluorescent tracer can detect the concentration of phosphorus in a water body, a detection signal is converted into a current signal and transmitted to the PLC control box, the current signal is used as the measurement input of the feedback controller to be compared with a set value, the deviation of the current signal is processed by a proper control algorithm and then is output as a current signal, the flow of a chemical dosing metering pump for dosing chemicals is controlled, and the precise control of the chemical dosing amount is realized.

Drawings

Fig. 1 is a schematic diagram of the overall process of the present invention.

In the figure: 1. a cooling tower; 2. a water collecting tank; 3. a circulation pump; 4. a heat exchanger; 5. a water replenishing electromagnetic valve; 6. a blowdown electromagnetic valve; 7. a conductivity and pH measuring cell; 8. a fluorescent tracer measuring cell; 9. flushing the electromagnetic valve; 10. a sterilizing algicide solution tank; 11. a scale and corrosion inhibitor solution tank; 12. a PLC control box; 13. dosing pumps.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, the present invention provides a technical solution: a chemical adding device by a fluorescent tracing method comprises a cooling tower 1, a water collecting tank 2, a heat exchanger 4, a sterilization algicide solution tank 10, a scale and corrosion inhibitor solution tank 11 and a PLC control box 12, wherein the top of the water collecting tank 2 is fixedly provided with the water collecting tank 2 at the top of the cooling tower 1, the water outlet of the water collecting tank 2 is connected with the water inlet of the heat exchanger 4 through a connecting pipe, a circulating pump 3 is arranged on the connecting pipe between the water collecting tank 2 and the heat exchanger 4, the water outlet of the heat exchanger 4 is connected with the water inlet of the cooling tower 1 through a connecting pipe, the bottom of the water collecting tank 2 is fixedly connected with a pollution discharge electromagnetic valve 6, the side surface of the water collecting tank 2 is provided with a water replenishing electromagnetic valve 5, the bottom of the water collecting tank 2 is fixedly communicated with a conductivity and pH measuring tank 7 and a fluorescent tracing instrument measuring tank 8, and the conductivity and pH measuring tank 7 and the fluorescent tracing instrument measuring tank 8 are arranged in series, the conductivity and pH measuring pool 7 can detect the conductivity and the pH value of the circulating water, the fluorescence tracer measuring pool 8 can detect the concentration of phosphorus in the circulating water, the top parts of the sterilization algicide solution tank 10 and the scale and corrosion inhibitor solution tank 11 are respectively and fixedly provided with a dosing metering pump 13, the dosing metering pump 13 can guide the medicament solution in the sterilization algicide solution tank 10 or the scale and corrosion inhibitor solution tank 11 into the water collecting pool 2, the fluorescence tracer can detect the concentration of phosphorus in the water body and convert a detection signal into a current signal to be transmitted to the PLC control box 12, the PLC control box 12 outputs the current signal after being processed by a specific algorithm to control the flow of the dosing metering pump 13 for dosing the medicament, thereby realizing the accurate control of the dosing amount, the conductivity and pH measuring pool 7 is electrically connected with the PLC control box 12, the conductivity and pH measuring pool 7 comprises a conductivity detector and a pH value detector, the measurement pool 8 of the fluorescent tracer is electrically connected with the PLC control box 12, the measurement pool 8 of the fluorescent tracer comprises a fluorescent tracer, the conductivity and the pH value in the circulating water are detected through the conductivity and pH measurement pool 7, the phosphorus concentration in the water is detected through the measurement pool 8 of the fluorescent tracer and is transmitted to the PLC control box 12, the PLC control box 12 can control a dosing pump 13 according to a detection signal to accurately control the dosing amount, the bottom of the measurement pool 7 of the conductivity and the pH and the measurement pool 8 of the fluorescent tracer are provided with a flushing solenoid valve 9, the flushing solenoid valve 9 is electrically connected with the PLC control box 12, the flushing solenoid valve 9 can be controlled by the PLC control box 12 to flush the inside of the measurement pool 7 of the conductivity and the pH and the measurement pool 8 of the fluorescent tracer, and after the operation is carried out for a fixed time, the PLC control box 12 controls the flushing electromagnetic valve 9 to flush the conductivity and pH measuring pool 7 and the fluorescence tracer measuring pool 8, the influence of more impurities in the conductivity and pH measuring pool 7 and the fluorescence tracer measuring pool 8 on detection values is avoided, the sterilization algicide solution tank 10 and the scale and corrosion inhibitor solution tank 11 are respectively provided with an electric remote transmission water meter and a liquid level lower limit switch which are electrically connected with the PLC control box 12, the water level in the sterilization algicide solution tank 10 and the scale and corrosion inhibitor solution tank 11 can be controlled through the electric remote transmission water meter and the liquid level lower limit switch, the water replenishing electromagnetic valve 5 and the pollution discharge electromagnetic valve 6 are electrically connected with the PLC control box 12, the water replenishing electromagnetic valve 5 can be controlled by the PLC control box 12 to add water into the water collecting tank 2, and the pollution discharge electromagnetic valve 6 can be controlled by the PLC control box 12 to discharge pollution to the water collecting tank 2 at intervals for a fixed time.

In summary, when the fluorescent tracing method dosing device is used, water in the water collecting tank 2 is driven to circularly flow among the heat exchanger 4, the cooling tower 1 and the water collecting tank 2 through the circulating pump 3, circulating water is cooled through the cooling tower 1 and the heat exchanger 4, the interior of the water collecting tank 2 is regularly drained through the drain solenoid valve 6, water is supplemented into the water collecting tank 2 through the water supplementing solenoid valve 5, the conductivity and pH measuring tank 7 and the fluorescent tracer measuring tank 8 are connected in series on the water collecting tank 2 and are communicated with the interior of the water collecting tank 2, the conductivity and the pH value in the water are detected through the conductivity detector and the pH value detector in the pH measuring tank 7, the current signal is detected through the fluorescent tracer in the fluorescent tracer measuring tank 8, the current signal is output by 4-20 milliamperes and has a determined corresponding relation with the phosphorus concentration in the water body, the current signal is transmitted to the PLC control box 12, the current signal is used as a measuring input value of the PLC control box 12 to be compared, the deviation is processed by a proper control algorithm, a 4-20 milliamperes analog signal is output, the dosing quantity is controlled, and the dosing quantity can be accurately controlled, namely, and the dosing quantity can be accurately controlled by the dosing pump.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Fluorescence tracer method charge device, including cooling tower (1), catch basin (2), heat exchanger (4) and disinfect algaecide solution tank (10), antisludging corrosion inhibitor solution tank (11), PLC control box (12), the top fixed mounting of catch basin (2) has catch basin (2) of cooling tower (1), the delivery port of catch basin (2) passes through the connecting pipe to be connected with the water inlet of heat exchanger (4), and is provided with circulating pump (3) on the connecting pipe of catch basin (2) and heat exchanger (4), the delivery port of heat exchanger (4) passes through the connecting pipe to be connected with the water inlet of cooling tower (1), its characterized in that: the utility model discloses a sterilization and scale and corrosion inhibitor solution tank, including catch basin (2), the bottom fixedly connected with blowdown solenoid valve (6) of catch basin (2), the side of catch basin (2) is provided with moisturizing solenoid valve (5), the fixed intercommunication in bottom of catch basin (2) has conductivity and pH measuring tank (7), fluorescence tracer measuring tank (8), and conductivity and pH measuring tank (7), fluorescence tracer measuring tank (8) adopt the series connection to arrange, conductivity and pH measuring tank (7) can detect circulating water conductivity and pH value, fluorescence tracer measuring tank (8) can detect the phosphorus concentration in the circulating water, the equal fixed mounting in top of sterilization and algae removal agent solution tank (10), scale and corrosion inhibitor solution tank (11) has dosing pump (13), dosing pump (13) can be inside leading-in scale and corrosion inhibitor solution tank (2) with the inside medicament solution of sterilization and algae removal agent solution tank (10) or corrosion inhibitor solution tank (11).

2. The fluorescent tracer dosing device of claim 1, wherein: conductivity and pH measuring cell (7) and PLC control box (12) electric connection, including conductivity detector, pH value detector in conductivity and pH measuring cell (7), fluorescence tracer measuring cell (8) and PLC control box (12) electric connection, including fluorescence tracer in fluorescence tracer measuring cell (8).

3. The fluorescent tracer dosing device of claim 1, wherein: conductivity and pH measuring cell (7), fluorescence tracer measuring cell (8) bottom are provided with washes solenoid valve (9), and wash solenoid valve (9) and PLC control box (12) electric connection, wash solenoid valve (9) and can receive PLC control box (12) control to inside washing of conductivity and pH measuring cell (7), fluorescence tracer measuring cell (8).

4. The fluorescent tracer dosing device according to claim 1, wherein: the sterilizing algicide solution tank (10) and the scale and corrosion inhibitor solution tank (11) are respectively provided with an electric remote water meter and a liquid level lower limit switch, and the electric remote water meter and the liquid level lower limit switch are electrically connected with the PLC control box (12).

5. The fluorescent tracer dosing device of claim 1, wherein: moisturizing solenoid valve (5), blowdown solenoid valve (6) all with PLC control box (12) electric connection, moisturizing solenoid valve (5) can receive inside interpolation of PLC control box (12) control box sump (2), blowdown solenoid valve (6) can receive PLC control box (12) control interval fixed time to carry out the blowdown to sump (2).