阅读说明：本技术 一种阀外冷补充水软化装置吸盐系统的优化设备及方法 (Optimization equipment and method for salt absorption system of valve external cooling water supplementing softening device ) 是由 薛嵩凌 陈德兴 李升晖 范彦琨 陈金文 陈灼 徐显烨 何志甘 黄东方 李冠颖 许 于 2020-12-15 设计创作，主要内容包括：本发明涉及一种阀外冷补充水软化装置吸盐系统的优化设备及方法,其中,设备包括PLC控制器、变频器、搅拌机、电导率传感器和进水流量传感器；所述电导率传感器、进水流量传感器和出水流量传感器与所述PLC控制器的输入端电连接,所述变频器和搅拌机与所述PLC控制器的输出端电连接,所述变频器的输出端与所述搅拌机电连接；所述电导率传感器设置于盐箱中,用于采集盐箱内盐水的电导率数据并发送至所述PLC控制器；所述进水流量传感器设置于盐箱的进水管道中,用于采集进水管道是否有水流流入的进水信号并发送至所述PLC控制器；所述PLC控制器根据电导率数据和进水信号控制所述搅拌机工频启动或通过所述变频器控制所述搅拌机变频启动。(The invention relates to an optimization device and a method for a salt absorption system of a valve external cooling make-up water softening device, wherein the device comprises a PLC (programmable logic controller), a frequency converter, a stirrer, a conductivity sensor and an inflow water flow sensor; the conductivity sensor, the water inlet flow sensor and the water outlet flow sensor are electrically connected with the input end of the PLC, the frequency converter and the stirrer are electrically connected with the output end of the PLC, and the output end of the frequency converter is electrically connected with the stirrer; the conductivity sensor is arranged in the salt tank and used for collecting conductivity data of the salt water in the salt tank and sending the conductivity data to the PLC; the water inlet flow sensor is arranged in a water inlet pipeline of the salt tank and used for acquiring a water inlet signal whether water flows into the water inlet pipeline or not and sending the water inlet signal to the PLC; and the PLC controls the mixer to start at power frequency according to the conductivity data and the water inlet signal or controls the mixer to start at variable frequency through the frequency converter.)

1. The utility model provides an optimization equipment of valve external cooling make-up water softening installation salt system that inhales which characterized in that:

comprises a PLC controller, a frequency converter, a stirrer, a conductivity sensor and a water inlet flow sensor;

the conductivity sensor, the water inlet flow sensor and the water outlet flow sensor are electrically connected with the input end of the PLC, the frequency converter and the stirrer are electrically connected with the output end of the PLC, and the output end of the frequency converter is electrically connected with the stirrer; the conductivity sensor is arranged in the salt tank and used for collecting conductivity data of the salt water in the salt tank and sending the conductivity data to the PLC; the water inlet flow sensor is arranged in a water inlet pipeline of the salt tank and used for acquiring a water inlet signal whether water flows into the water inlet pipeline or not and sending the water inlet signal to the PLC; and the PLC controls the mixer to start at power frequency according to the conductivity data and the water inlet signal or controls the mixer to start at variable frequency through the frequency converter.

2. The optimizing equipment of the salt absorption system of the valve external cold make-up water softening device according to claim 1, wherein: the device also comprises a temperature sensor, a first heater and a second heater; the temperature sensor is arranged in the salt box and is electrically connected with the input end of the PLC sensor, and the first heater and the second heater are arranged in the salt box and are electrically connected with the output end of the PLC sensor; the temperature sensor is used for collecting temperature signals in the salt box, and the PLC controls the first heater and the second heater to start or stop according to the temperature signals.

3. The optimizing equipment of the salt absorption system of the valve external cold make-up water softening device according to claim 1, wherein: the salt tank is characterized by further comprising a water outlet flow sensor, wherein the water outlet flow sensor is arranged in a water outlet pipeline of the salt tank and used for acquiring a water outlet signal whether water flows out of the water outlet pipeline or not and sending the water outlet signal to the PLC; and the PLC sends a signal whether the water outlet pipe is blocked to the upper computer according to the water outlet signal.

4. An optimization method of a salt absorption system of an external valve cold make-up water softening device is realized based on the optimization equipment of the salt absorption system of the external valve cold make-up water softening device of any one of claims 1 to 3, and is characterized by comprising the following steps:

step S01, when the water inlet flow sensor collects a water inlet signal, the water inlet signal is sent to the PLC controller, the PLC controller starts to judge whether the duration time of the water inlet signal reaches a preset threshold value T1, if the duration time of the water inlet signal reaches the preset threshold value T1, the step S1 is executed, and if the duration time of the water inlet signal does not reach the preset threshold value T1, no action is executed;

step S02, the conductivity sensor collects conductivity data of salt water in the salt tank in real time and sends the conductivity data to the PLC, the PLC judges whether the conductivity data is lower than a preset threshold value T2, no action is executed if the conductivity data is not lower than T2, the PLC further judges whether the inflow water flow sensor collects an inflow water signal if the conductivity data is lower than T2, step S1 is executed if the inflow water signal is collected, and step S2 is executed if the inflow water signal is not collected;

step S1, the PLC controller controls the mixer to start at power frequency, controls the mixer to stop after the set mixing time is reached, and controls the mixer not to start within the appointed time after the mixer stops;

and step S2, the PLC controls the stirrer to start in a frequency conversion mode through the frequency converter, controls the stirrer to stop after the set stirring time is reached, and controls the stirrer not to start within the designated time after the stirrer stops.

5. The method for optimizing the salt absorption system of the valve external cold make-up water softening device according to claim 4, wherein the method comprises the following steps: in step S2, the PLC controller performs variable frequency start according to the conductivity data; controlling the speed of the blender according to the following formula:

wherein n is the rotating speed of the stirrer, sigma is the electric conductivity, and nmax is the preset maximum rotating speed.

6. The method for optimizing the salt absorption system of the cold make-up water softening device outside the valve as claimed in claim 4, further comprising step S3, wherein step S31 specifically comprises:

step S31, the temperature sensor collects temperature data in the salt box in real time and sends the temperature data to the PLC, the PLC judges whether the temperature is lower than a threshold value T3, if the temperature is lower than T3, the PLC controls the first heater to start, if the temperature is not lower than T3, the PLC continues to judge whether the temperature is higher than the threshold value T4, if the temperature is higher than T4, the PLC controls the first heater to stop, and if the temperature is not higher than T4, the PLC does not execute actions;

and step S32, the PLC controller judges whether the temperature is lower than a threshold T5, if the temperature is lower than T5, the PLC controller controls the second heater to start, if the temperature is not lower than T5, the PLC controller continues to judge whether the temperature is higher than the threshold T6, if the temperature is higher than T6, the PLC controller controls the second heater to stop, and if the temperature is not higher than T6, the PLC controller does not execute the action.

7. The method for optimizing the salt absorption system of the valve outside cold make-up water softening device according to claim 4, further comprising step S4, wherein the step S4 specifically comprises:

the water outlet flow sensor collects water outlet signals in real time and sends the water outlet signals to the PLC, and when the water outlet signals disappear and the disappearance time is longer than a threshold value T7, the PLC sends water outlet pipe blocking signals to the upper computer.

Technical Field

The invention relates to an optimization device and method for a salt absorption system of an external valve cold make-up water softening device, and belongs to the technical field of industrial automation.

Background

The softening of the cold make-up water outside the valve adopts full-automatic softened water treatment equipment, and consists of an ion exchanger, a regeneration system and a salt absorption system.

The ion exchanger is a part of a regeneration system, the salt absorption system absorbs salt water in the salt tank into the ion exchanger, and in the ion exchanger, the salt water reacts with resin in the ion exchanger to recover the capacity of the resin for absorbing calcium and magnesium ions, which is a regeneration process. A high-low liquid level switch and a conductivity sensor are arranged in the salt tank, the liquid level of the salt tank can be detected, and when the water level does not meet the requirement, water is automatically supplemented; and when the conductivity of the saline water in the salt box does not meet the requirement, prompting the operation and maintenance personnel to supplement industrial salt or stir the saline solution on site.

At present, when the conductivity in the salt box does not meet the requirement, a monitoring background can give an alarm to prompt, and operation and maintenance personnel can add salt through an automatic salt adding device or manually. The regeneration cycle of the current valve external cold make-up water softening system adopts a water consumption cycle, such as: 120m per normal process³The softening device is regenerated for 30min by supplementing water (tap water); about 0.25t of saturated salt solution is consumed for each regeneration; for example, the load statistics (09: 00-23: 00, 370MW active, 0MVar idle; 180MW active, 0MVar idle at other times) would require about 6 regenerations of the softening system per week, consuming about 1.5t of saturated salt solution. Meanwhile, according to the solubility calculation of industrial salt (room temperature is 20 ℃, the salt solubility is 36g/100g), 540KG of salt is consumed for 1.5t of saturated salt solution.

And the phenomenon that the industrial salt is caked and the salt absorption pipe is blocked is easily caused by adding a large amount of industrial salt in the salt box at one time, so that operation and maintenance personnel can only add a small amount of salt at one time, salt needs to be added once in about 3-4 days, the phenomenon that salt needs to be added frequently is caused, and a large amount of manpower is consumed. Meanwhile, industrial salt is agglomerated at the bottom of the salt tank, so that the industrial salt cannot be fully dissolved, and the salt solution sucked into the softening tank is possibly not a saturated salt solution, so that the phenomenon of insufficient regeneration is caused.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an optimization device and method for a salt absorption system of a valve external cooling make-up water softening device, which can ensure that industrial salt does not agglomerate and the salt solution absorbed by a softening tank is saturated salt solution, thereby achieving the purposes of saving manpower and ensuring the full regeneration of resin in the softening tank.

The technical scheme of the invention is as follows:

the first technical scheme is as follows:

an optimization device of a salt absorption system of a valve external cooling make-up water softening device comprises a PLC (programmable logic controller), a frequency converter, a stirrer, a conductivity sensor and a water inlet flow sensor;

the conductivity sensor, the water inlet flow sensor and the water outlet flow sensor are electrically connected with the input end of the PLC, the frequency converter and the stirrer are electrically connected with the output end of the PLC, and the output end of the frequency converter is electrically connected with the stirrer; the conductivity sensor is arranged in the salt tank and used for collecting conductivity data of the salt water in the salt tank and sending the conductivity data to the PLC; the water inlet flow sensor is arranged in a water inlet pipeline of the salt tank and used for acquiring a water inlet signal whether water flows into the water inlet pipeline or not and sending the water inlet signal to the PLC; and the PLC controls the mixer to start at power frequency according to the conductivity data and the water inlet signal or controls the mixer to start at variable frequency through the frequency converter.

Further, the device also comprises a temperature sensor, a first heater and a second heater; the temperature sensor is arranged in the salt box and is electrically connected with the input end of the PLC sensor, and the first heater and the second heater are arranged in the salt box and are electrically connected with the output end of the PLC sensor; the temperature sensor is used for collecting temperature signals in the salt box, and the PLC controls the first heater and the second heater to start or stop according to the temperature signals.

The salt tank is characterized by further comprising a water outlet flow sensor, wherein the water outlet flow sensor is arranged in a water outlet pipeline of the salt tank and used for acquiring a water outlet signal whether water flows out from the water outlet pipeline or not and sending the water outlet signal to the PLC; and the PLC sends a signal whether the water outlet pipe is blocked to the upper computer according to the water outlet signal.

The second technical scheme is as follows:

an optimization method of a salt absorption system of an external valve cold make-up water softening device is realized based on the optimization equipment of the salt absorption system of the external valve cold make-up water softening device in the technical scheme I, and comprises the following steps:

step S01, when the water inlet flow sensor collects a water inlet signal, the water inlet signal is sent to the PLC controller, the PLC controller starts to judge whether the duration time of the water inlet signal reaches a preset threshold value T1, if the duration time of the water inlet signal reaches the preset threshold value T1, the step S1 is executed, and if the duration time of the water inlet signal does not reach the preset threshold value T1, no action is executed;

step S02, the conductivity sensor collects conductivity data of salt water in the salt tank in real time and sends the conductivity data to the PLC, the PLC judges whether the conductivity data is lower than a preset threshold value T2, no action is executed if the conductivity data is not lower than T2, the PLC further judges whether the inflow water flow sensor collects an inflow water signal if the conductivity data is lower than T2, step S1 is executed if the inflow water signal is collected, and step S2 is executed if the inflow water signal is not collected;

step S1, the PLC controller controls the mixer to start at power frequency, controls the mixer to stop after the set mixing time is reached, and controls the mixer not to start within the appointed time after the mixer stops;

and step S2, the PLC controls the stirrer to start in a frequency conversion mode through the frequency converter, controls the stirrer to stop after the set stirring time is reached, and controls the stirrer not to start within the designated time after the stirrer stops.

Further, in step S2, the PLC controller performs variable frequency starting according to the conductivity data; controlling the speed of the blender according to the following formula:

wherein n is the rotating speed of the stirrer, sigma is the electric conductivity, and nmax is the preset maximum rotating speed.

Further, the method further includes step S3, and step S31 specifically includes:

step S31, the temperature sensor collects temperature data in the salt box in real time and sends the temperature data to the PLC, the PLC judges whether the temperature is lower than a threshold value T3, if the temperature is lower than T3, the PLC controls the first heater to start, if the temperature is not lower than T3, the PLC continues to judge whether the temperature is higher than the threshold value T4, if the temperature is higher than T4, the PLC controls the first heater to stop, and if the temperature is not higher than T4, the PLC does not execute actions;

and step S32, the PLC controller judges whether the temperature is lower than a threshold T5, if the temperature is lower than T5, the PLC controller controls the second heater to start, if the temperature is not lower than T5, the PLC controller continues to judge whether the temperature is higher than the threshold T6, if the temperature is higher than T6, the PLC controller controls the second heater to stop, and if the temperature is not higher than T6, the PLC controller does not execute the action.

Further, the method further includes step S4, where step S4 specifically includes:

the water outlet flow sensor collects water outlet signals in real time and sends the water outlet signals to the PLC, and when the water outlet signals disappear and the disappearance time is longer than a threshold value T7, the PLC sends water outlet pipe blocking signals to the upper computer. .

The invention has the following beneficial effects:

1. the invention relates to an optimization device and a method for a salt absorption system of a valve external cooling make-up water softening device, which utilize a water inlet flow sensor, a conductivity sensor and a PLC (programmable logic controller) to monitor and control the conductivity of a salt box, utilize a frequency converter and a stirrer to stir the salt water in the salt box in time, ensure that the conductivity of the salt water meets the requirement, ensure that the salt solution absorbed by a softening tank is a saturated salt solution, and further achieve the purposes of saving manpower and ensuring the full regeneration of resin in the softening tank.

2. The invention relates to an optimized device and a method for a salt absorption system of a valve external cooling make-up water softening device, which are additionally provided with a temperature sensor and a heater, realize automatic heating of water in a salt tank according to air temperature, ensure that industrial salt solution in the salt tank meets the requirements of a water treatment device, enhance the reliability of the water treatment device and save manpower.

3. The invention relates to an optimization device and method for a salt absorption system of a valve external cooling water supplementing softening device.

Drawings

FIG. 1 is a schematic block diagram of an apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of an apparatus according to a first embodiment of the present invention;

FIG. 3 is a flowchart of a second embodiment of the present invention;

FIG. 4 is a graph of agitator speed as a function of conductivity in a second embodiment of the present invention;

FIG. 5 is a flowchart of step S31 according to the second embodiment of the present invention;

fig. 6 is a flowchart of step S32 in the second embodiment of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Example one

Referring to fig. 1 and 2, an optimizing apparatus of a salt absorption system of a valve external cooling make-up water softening device comprises a PLC controller, a frequency converter, a blender, a conductivity sensor and an inflow water flow sensor;

the conductivity sensor, the water inlet flow sensor and the water outlet flow sensor are electrically connected with the input end of the PLC, the frequency converter and the stirrer are electrically connected with the output end of the PLC, and the output end of the frequency converter is electrically connected with the stirrer; the conductivity sensor is arranged in the salt tank and used for collecting conductivity data of the salt water in the salt tank and sending the conductivity data to the PLC; the water inlet flow sensor is arranged in a water inlet pipeline of the salt tank and used for acquiring a water inlet signal whether water flows into the water inlet pipeline or not and sending the water inlet signal to the PLC; and the PLC controls the mixer to start at power frequency according to the conductivity data and the water inlet signal or controls the mixer to start at variable frequency through the frequency converter. The mixer is selected according to the actual salt box, for example, the salt box with the capacity of 1000L can be used as a mixer with a motor with the power of 2000W, and a mixing blade with the diameter of about 50cm is additionally arranged.

Further, the device also comprises a temperature sensor, a first heater and a second heater; the temperature sensor is arranged in the salt box and is electrically connected with the input end of the PLC sensor, and the first heater and the second heater are arranged in the salt box and are electrically connected with the output end of the PLC sensor; the temperature sensor is used for collecting temperature signals in the salt box, and the PLC controls the first heater and the second heater to start or stop according to the temperature signals. The specifications of the first heater and the second heater are selected according to practical use, for example, a salt box with the capacity of 1000L, and the first heater and the second heater can meet the requirement by adopting 2 semiconductor PFA immersion heaters with the power of 15000W.

The salt tank is characterized by further comprising a water outlet flow sensor, wherein the water outlet flow sensor is arranged in a water outlet pipeline of the salt tank and used for acquiring a water outlet signal whether water flows out from the water outlet pipeline or not and sending the water outlet signal to the PLC; and the PLC sends a signal whether the water outlet pipe is blocked to the upper computer according to the water outlet signal.

Example two:

referring specifically to fig. 3, an optimization method of a salt absorption system of an external-valve cold make-up water softening device is implemented based on an optimization device of the salt absorption system of the external-valve cold make-up water softening device according to the first embodiment, and includes the following steps:

step S01, when the water inlet flow sensor collects a water inlet signal, the water inlet signal is sent to the PLC controller, the PLC controller starts to perform judgment, and determines whether the duration time of the water inlet signal reaches a preset threshold T1, if the duration time of the water inlet signal reaches the preset threshold T1, step S1 is performed, and if the duration time of the water inlet signal does not reach the preset threshold T1, no action is performed, in this embodiment, T1 is 30 seconds (S);

step S02, the conductivity sensor collects conductivity data of the brine in the salt tank in real time and sends the conductivity data to the PLC controller, the PLC controller determines whether the conductivity data is lower than a preset threshold T2, no action is performed if the conductivity data is not lower than T2, the conductivity data is lower than T2, the PLC controller further determines whether the inflow water flow sensor collects an inflow water signal, if the inflow water signal is collected, step S1 is performed, and if the inflow water signal is not collected, step S2 is performed, in this embodiment, T2 is 14 siemens/meter (S/m);

step S1, the PLC controls the mixer to start at power frequency, controls the mixer to stop after the set mixing time is reached, and controls the mixer not to start within the appointed time after the mixer stops, in the embodiment, the set mixing time is 3 minutes (min), and the mixer does not start within the set 5 hours after the mixer stops;

and step S2, the PLC controls the stirrer to start in a frequency conversion mode through the frequency converter, controls the stirrer to stop after the set stirring time is reached, controls the stirrer not to start within the appointed time after the stirrer stops, sets the stirring time to be 3 minutes (min), and sets the stirrer not to start within 5 hours after the stirrer stops.

Further, referring to fig. 4, in step S2, the PLC controller performs a variable frequency start according to the conductivity data; controlling the speed of the blender according to the following formula:

where n is the agitator speed in units of (rpm/sec), σ is the electrical conductivity in units of (siemens/m), and nmax is the predetermined maximum speed, which is set to 4.5r/s in this example.

Further, referring to fig. 5 and 6, the method further includes step S3, and step S31 specifically includes:

step S31, the temperature sensor collects temperature data in the salt box in real time and sends the temperature data to the PLC, the PLC judges whether the temperature is lower than a threshold value T3, if the temperature is lower than T3, the PLC controls the first heater to be started, if the temperature is not lower than T3, the PLC continues to judge whether the temperature is higher than the threshold value T4, if the temperature is higher than T4, the PLC controls the first heater to be stopped, and if the temperature is not higher than T4, the action is not executed, in the embodiment, T3 is 20 ℃, and T4 is 32 ℃;

step S32, the PLC controller determines whether the temperature is lower than a threshold T5, if the temperature is lower than T5, the PLC controller controls the second heater to start, if the temperature is not lower than T5, the PLC controller continues to determine whether the temperature is higher than the threshold T6, if the temperature is higher than T6, the PLC controller controls the second heater to stop, and if the temperature is not higher than T6, the PLC controller does not perform the operation, in this embodiment, T5 is 18 ℃, and T6 is 30 ℃.

Further, the method further includes step S4, where step S4 specifically includes:

the water outlet flow sensor collects water outlet signals in real time and sends the water outlet signals to the PLC, when the water outlet signals disappear and the disappearing time is longer than a threshold value T7, the PLC sends out water outlet pipe blocking signals to the upper computer, and in the embodiment, T7 is set to be 30 seconds.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.