Automatic dosing device for industrial circulating water

Abstract

The utility model relates to the field of industrial water equipment, in particular to an automatic dosing device for industrial circulating water. The device comprises a medicine storage tank, a console, an online detector and an electromagnetic PLC (programmable logic controller), the medicine storage tank is provided with a discharge port, and a discharge port connecting pipeline is connected with a one-way valve, an electromagnetic valve, a transmission pump and an electronic flowmeter in series and is finally connected into a circulating water main pipeline; the on-line detector is provided with a detection probe and a data output port, the detection probe is fixedly inserted into the inner side of the circulating water main pipeline, is located at the downstream position of 2-3 m of a dosing point and is used for monitoring the content of total phosphorus or total ammonia in water in real time, and signals are transmitted through the data output port; the console is provided with a detection data access port, an electromagnetic PLC control interface and a data processing module, and the electromagnetic PLC executes the command of the console. According to the utility model, the total phosphorus element or the total nitrogen element of the water body is maintained in a certain range by monitoring the content of the elements in the water on line and controlling the dosing of the water body in an interlocking manner, so that the water quality of the water body is maintained and the purpose of safe production is achieved.

Description

Technical Field

[0001] The utility model relates to the field of industrial water equipment, in particular to an automatic dosing device for industrial circulating water. Background Art

[0002] Industrial production consumes enormous amounts of water, with boiler water, cooling water, and heating water accounting for over 95% of total water consumption. To reduce water costs, this industrial water is typically recycled. This recycling process imposes certain water quality requirements. The main factors affecting industrial water quality are metal ions and microbial algae. The former forms scale, primarily calcium, magnesium, and iron scale, while the latter forms biofilms, which promote scale formation. Both are significant factors affecting water safety and limiting the duration of water recycling.

[0003] In order to solve these problems, various water treatment agents are usually added to industrial water to limit the formation of scale or to sterilize and kill algae. In industrial water, adding a small amount of water treatment agent can improve the water quality within a period of time and meet the requirements of industrial water. The best way to add materials is to control the stable content of water treatment agents in the water body by adding small amounts multiple times, thereby stabilizing the water body and promoting stable and safe operation of industrial production. In actual production, almost all materials are added manually, which is not only time-consuming and labor-intensive, but also prone to forgetting to add, missing and over-adding, which is not conducive to safe production and cost saving. In this regard, the present invention provides an automatic dosing device for industrial circulating water, which can effectively solve the above problems. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides an automatic dosing device for industrial circulating water, which realizes automatic dosing operation by online real-time detection of water reagent content and chain control of dosing operation mode.

[0005] The utility model is achieved through the following technical solutions:

[0006] The utility model of the automatic dosing device for industrial circulating water includes a drug storage tank, a control console, an online detector and an electromagnetic PLC.

[0007] The medicine storage tank is provided with a discharge port, which is connected to a pipeline connected in series with a one-way valve, a solenoid valve, a transmission pump and an electronic flow meter, and finally connected to the circulating water main pipeline;

[0008] The online detector is provided with a detection probe and a data output port. The detection probe is inserted into the circulating water main pipe. The top end of the detection probe passes through the inner side of the circulating water main pipe and is fixed. The probe is fixed at a distance of 2 to 3 meters downstream of the connection point between the discharge port of the drug storage tank and the circulating water main pipe.

[0009] The console is provided with a detection data access port, an electromagnetic PLC control interface and a data processing module. The electromagnetic PLC control interface is connected to the control signal ports of the solenoid valve and the transmission pump, the detection data access port is connected to the data output port of the online detector, and the data processing module is connected to the detection data access port and the electromagnetic PLC control interface.

[0010] According to the automatic dosing device for industrial circulating water, the medicine storage tank is a liquid medicine storage tank, the main tank body of which is a cube or a cylinder, with a feed port at the upper end and a discharge port at the bottom, and a liquid level gauge and a shell and tube heat exchanger on the outer wall. The feed port is connected in series with a one-way valve, a transmission pump and a tapered port through a hose in sequence, and the discharge port is connected to the circulating water main pipeline through a pipeline.

[0011] According to the automatic dosing device for industrial circulating water, the medicine storage tank is a solid medicine storage tank, the main tank body of which is a long cylinder, with a flip cover on the top, a water inlet embedded in the flip cover, a discharge port at the bottom, and a shell and tube heat exchanger on the outer wall. The water inlet is connected to the circulating water main pipeline through a pipeline, and is connected in series with a one-way valve, a transmission pump and an electronic flow meter. The discharge port is connected to the circulating water main pipeline through a pipeline, and is connected in series with a one-way valve, a transmission pump and an electronic flow meter. The position where the discharge port is connected to the circulating water main pipeline is downstream of the water inlet connection position, and is 1 to 5 meters away.

[0012] According to the automatic dosing device for industrial circulating water, the online detector is selected as a total phosphorus online detector or a total nitrogen online detector according to demand.

[0013] According to the automatic dosing device for industrial circulating water, the console is also provided with a manual operation panel and a voice-controlled alarm device. The manual operation panel is provided with an operating parameter setting key and an emergency stop button. The emergency stop button can manually shut down the drug delivery of the drug storage tank.

[0014] According to the automatic dosing device for industrial circulating water, the data processing module includes a data processor and a data display screen. The data processor is connected to the data input port, signal output port, voice-controlled alarm device, data display screen of the data processing module, all operating parameter setting keys and emergency stop button of the manual operation panel through lines.

[0015] This utility model provides an automatic dosing device for circulating water. By online monitoring of elemental content in water, it controls the dosing of chemicals, maintaining total phosphorus or total nitrogen in the water within a certain range, maintaining water quality, and achieving safe production. This device replaces manual dosing with controlled automatic dosing, effectively avoiding safety hazards and chemical waste caused by human error, further improving the safety of circulating water and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 For liquid storage tanks,

[0018] Figure 3 It is a solid medicine storage tank.

[0019] In the figure: 1. Medicine storage tank, 2. Control console, 201. Detection data access port, 202. PLC control interface, 203. Data processing module, 204. Manual operation panel, 205. Voice-controlled alarm device, 3. Online detector, 301. Detection probe, 302. Data output port, 4. PLC, 401. Control signal receiving port, 402. Control signal transmitting port, 5. Circulating water main pipeline, 11. Liquid tank body, 12. Liquid feed port, 13. Liquid discharge port, 14. Liquid level gauge, 15. Liquid tank shell and tube heat exchanger, 16. Solid tank body, 17. Flip cover, 18. Water inlet, 19. Discharge port, 20. Solid tank shell and tube heat exchanger. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment will mainly focus on the dosing of circulating boiler water.

[0021] The utility model discloses an automatic dosing device for industrial circulating water, comprising a drug storage tank 1, a control console 2, an online detector 3 and a PLC. The drug storage tank 1 is provided with a discharge port, the discharge port is connected to a pipeline connected in series with a one-way valve, a solenoid valve, a transmission pump and an electronic flow meter, and finally connected to a circulating water main pipeline 5;

[0022] The online detector 3 is provided with a detection probe 301 and a data output port 302. The detection probe 301 is inserted into the circulating water main pipe 5. The top end of the detection probe 301 passes through the inner side of the circulating water main pipe 5 and is fixed. The probe is fixed at a distance of 2 to 3 meters downstream from the connection position between the discharge port of the medicine storage tank 1 and the circulating water main pipe 5.

[0023] The console 2 is provided with a detection data access port 201, a PLC control interface 202 and a data processing module 203. The PLC control interface 202 is connected to the control signal ports of the solenoid valve and the transmission pump. The detection data access port 201 is connected to the data output port 302 of the online detector 3. The data processing module 203 is connected to the detection data access port 201 and the PLC control interface 202.

[0024] The medicine storage tank 1 is divided into liquid medicine storage tank 1 and solid medicine storage tank 1 according to the different medicines added.

[0025] When the added medicine is liquid, the liquid medicine storage tank 1 is a cube or a cylinder, with a liquid feed port 12 at the upper end, a liquid discharge port 13 at the bottom, a liquid level meter 14 and a liquid tank shell and tube heat exchanger 15 on the outer wall. The liquid feed port 12 is connected in series with a one-way valve, a solenoid valve, a transmission pump and an electronic flow meter through a hose in sequence, and finally connected to the circulating water main pipeline 5.

[0026] When the added medicine is solid, the main body of the tank is a long column with a flip cover 17 on the top. The flip cover 17 is embedded with a water inlet 18 to dissolve the fixed medicine.

[0027] A discharge port is provided at the bottom, and a shell and tube heat exchanger is provided on the outer wall. The water inlet 18 is connected to the circulating water main pipeline 5 through a pipeline, and is connected in series with a one-way valve, a transmission pump and an electronic flow meter. The discharge port is connected in series with a one-way valve, a solenoid valve, a transmission pump and an electronic flow meter through a pipeline, and is finally connected to the circulating water main pipeline 5. The position of connecting the circulating water main pipeline 5 is downstream of the connection position of the water inlet 18, and is 1 to 5 meters away.

[0028] The online detector 3 of this device is selected as a total phosphorus online detector 3 or a total nitrogen online detector 3 according to needs.

[0029] The control console 2 is further provided with a manual operation panel 204 and a voice-controlled alarm device 205 . The manual operation panel 204 is provided with operation parameter setting keys and an emergency stop button. The emergency stop button can manually stop the medicine delivery of the medicine storage tank 1 .

[0030] The data processing module 203 includes a data processor and a data display screen. The data processor is connected to the data input port, signal output port, voice-controlled alarm device 205, data display screen of the data processing module 203, all operating parameter setting keys and emergency stop button of the manual operation panel 204 through lines.

[0031] The data processing module sets the alarm lower limit a, operating concentration lower limit b, and operating concentration upper limit c, with the values ​​a<b<c, where a, b, and c are the concentrations of core elements. When the online detection value x is c, the voice-controlled alarm device is activated in a chain manner. When the online detection value x, a≤x<b, the console sends a start signal that is transmitted to the PLC through the signal output port, and the PLC transmits the control signal to all transmission pumps through the control signal transmitting port to set the flow rate and start the pumps. When the online detection value x, b≤x≤c, the console sends a stop signal that is transmitted to the PLC through the signal output port, and the PLC transmits the control signal to all transmission pumps through the control signal transmitting port to shut down the pumps.

[0032] The control signal is the mass of the core element added per unit time, and the calculation formula is: (cx)V, where V is the liquid flow rate in the circulating water main pipeline, in g / min (the density of water in the circulating water main pipeline is regarded as 1g / cm3), and the transmission pump sets the flow rate v=(cx)V / C, in g / min, where C is the mass concentration of the core element in the storage tank.

[0033] The liquid water treatment agent used in this utility model comprises a 40% aqueous solution of organic phosphate, which has a total phosphorus content of 12.04%. The solid water treatment agent comprises approximately 80% soluble organic phosphate solid particles, whose saturated aqueous solution has a total phosphorus content of 1.82% at room temperature. Both water treatment agents are produced by the applicant. The online detector used is a total phosphorus online detector.

[0034] Parameter settings:

[0035] The flow rate of the circulating boiler water main pipeline is 18L / min, and the circulating water density is 1.003g / cm3.

[0036] Based on the complexing ability of phosphorus on calcium and magnesium in boiler water, it is concluded that the total phosphorus content required to maintain boiler water quality is 6~10ppm. Subsequently, various limit values ​​a=3ppm, b=6ppm, c=10ppm are set for the data processing module. Various operating and alarm parameters are then set through the manual operation panel of the console based on the above limit values.

[0037] The top probe of the total phosphorus online detector detection inlet connecting pipeline is fixed on the boiler circulating water main pipeline 3m downstream of the connection position between the medicine storage tank discharge port and the circulating water main pipeline; the position where the solid medicine storage tank discharge port is connected to the boiler circulating water main pipeline is 2m downstream of the connection position between the solid medicine storage tank water inlet and the circulating water main pipeline. Example

[0038] 1) When using a liquid storage tank, pump the 40% organic phosphate aqueous solution in the ton barrel into the main tank body of the liquid storage tank through the feed port through a hose that connects the tapered port, transfer pump and one-way valve in series. By observing the liquid level gauge, control the addition of the drug to 2 / 3 of the volume of the subject tank body, stop adding the drug, close the corresponding valves and transfer pump, and control the temperature of the subject tank body at 10~30℃ through the shell and tube heat exchanger. If the ambient temperature is suitable, there is no need to open the heat exchanger.

[0039] Turn on the total phosphorus online detector, take a water sample with a probe and enter the detector through the detection inlet to detect the total phosphorus content in real time. The total phosphorus test results are input from the data output port to the data processing module of the console through the data access port, and then the following operations are performed according to the total phosphorus content:

[0040] When the total phosphorus content is detected to be 4.54ppm, the data processing module of the control console calculates a signal to start the transmission pump at a feed rate of 0.81g / min. The signal is converted from the signal output port to the PLC through the control signal receiving port and the parameter setting of the transmission pump is completed. The signal is sent to the transmission pump through the control signal transmitting port to start operation.

[0041] When the total phosphorus content is detected to be 6.78ppm, the control console sends a signal to shut down the transmission pump, and the transmission pump is shut down through PLC control.

[0042] 2) When using a solid drug storage tank, open the flap, fill the cylindrical tank with soluble organic phosphate solid particles, close the flap, add water through the water inlet 102 until it is full, and control the temperature of the tank at 10~30℃ through the shell and tube heat exchanger. If the ambient temperature is suitable, there is no need to open the heat exchanger.

[0043] Turn on the total phosphorus online detector, take a water sample with a probe and enter the detector through the detection inlet to detect the total phosphorus content in real time. The total phosphorus test results are input from the data output port to the data processing module of the console through the data access port, and then the following operations are performed according to the total phosphorus content:

[0044] When the total phosphorus content is detected to be 5.25 ppm, the data processing module of the control console calculates a signal to start the transmission pump at a feed rate of 1.07 g / min. The signal enters the PLC from the signal output port through the control signal receiving port 401 for conversion and completes the parameter setting of the transmission pump. The signal is then sent to the two transmission pumps through the control signal transmitting port 402 to start operation simultaneously.

[0045] When the total phosphorus content is detected to be 6.35 ppm, the control console 2 sends a signal to shut down the transmission pump, and all transmission pumps are shut down through the PLC control.

[0046] 3) During the operation of the above two types of drug storage tanks, if there is a problem with the equipment and reagents, the total phosphorus content will continue to decrease without adding drugs, or the total phosphorus content will continue to increase due to continuous addition of drugs, which will cause the total phosphorus content of the circulating water to be less than 3ppm or greater than 10ppm. At this time, the data processing module 203 of the control console 2 will issue an alarm signal after receiving the total phosphorus abnormality data from the online total phosphorus detector 3 and transmit it to the voice-controlled alarm device 205, issuing a sound alarm to notify personnel to perform maintenance.

[0047] In actual use, for a drug storage tank of the same volume, the service life of a solid drug storage tank is about twice that of a liquid drug storage tank after one dosing.

[0048] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, based on the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, replacements and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. An automatic dosing device for industrial circulating water, characterized in that: It includes a drug storage tank (1), a control console (2), an online detector (3) and a PLC (4). The medicine storage tank (1) is provided with a discharge port, the discharge port is connected to a pipeline connected in series with a one-way valve, a solenoid valve, a transmission pump and an electronic flow meter, and finally connected to a circulating water main pipeline (5); The online detector (3) is provided with a detection probe (301) and a data output port (302), wherein the detection probe (301) is inserted into the circulating water main pipe (5), and the top end of the detection probe (301) passes through the inner side of the circulating water main pipe (5) and is fixed, and the probe is fixed at a position 2 to 3 m downstream of the connection position between the discharge port of the drug storage tank (1) and the circulating water main pipe (5); The control console (2) is provided with a detection data access port (201), a PLC control interface (202) and a data processing module (203); the PLC control interface (202) is connected to the control signal port of the solenoid valve and the transmission pump; the detection data access port (201) is connected to the data output port (302) of the online detector (3); and the data processing module (203) is connected to the detection data access port (201) and the PLC control interface (202).

2. The automatic dosing device for industrial circulating water according to claim 1 is characterized in that: The medicine storage tank (1) is a liquid medicine storage tank (1), the main tank body of which is a cube or a column, with a liquid feed port (12) provided at the top, a liquid discharge port (13) provided at the bottom, a liquid level gauge (14) and a liquid tank shell and tube heat exchanger (15) provided on the outer wall, and the liquid feed port (12) is connected in series with a one-way valve, a transmission pump and an electronic flow meter through a hose in sequence, and finally connected to a circulating water main pipeline (5).

3. The automatic dosing device for industrial circulating water according to claim 1 is characterized in that: The medicine storage tank (1) is a solid medicine storage tank (1), the main tank body of which is a long column, with a flap (17) provided on the top, a water inlet (18) embedded in the flap (17), a discharge port provided at the bottom, and a shell and tube heat exchanger provided on the outer wall. The water inlet (18) is connected to the circulating water main pipeline (5) through a pipeline, and is connected in series with a one-way valve, a transmission pump and an electronic flow meter. The discharge port is connected in series with a one-way valve, a solenoid valve, a transmission pump and an electronic flow meter through a pipeline, and is finally connected to the circulating water main pipeline (5). The position of connecting the circulating water main pipeline (5) is downstream of the connection position of the water inlet (18), and is 1 to 5 meters away.

4. The automatic dosing device for industrial circulating water according to claim 1 is characterized in that: The online detector (3) is selected as a total phosphorus online detector (3) or a total nitrogen online detector (3) according to needs.

5. The automatic dosing device for industrial circulating water according to claim 1 is characterized in that: The control console (2) is further provided with a manual operation panel (204) and a voice-controlled alarm device (205). The manual operation panel (204) is provided with an operation parameter setting key and an emergency stop button. The emergency stop button can manually shut down the medicine delivery of the medicine storage tank (1).

6. The automatic dosing device for industrial circulating water according to claim 5 is characterized in that: The data processing module (203) includes a data processor and a data display screen. The data processor is connected to the data input port, signal output port, voice-controlled alarm device (205) of the control console (2), the data display screen of the data processing module (203), all operating parameter setting keys and the emergency stop button of the manual operation panel (204) through lines.

Images