CN215855370U - Online medicine adjusting device that adds of recirculated cooling water system - Google Patents
Online medicine adjusting device that adds of recirculated cooling water system Download PDFInfo
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- CN215855370U CN215855370U CN202122312213.6U CN202122312213U CN215855370U CN 215855370 U CN215855370 U CN 215855370U CN 202122312213 U CN202122312213 U CN 202122312213U CN 215855370 U CN215855370 U CN 215855370U
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Abstract
The utility model discloses an online dosing adjusting device of a circulating cooling water system, belonging to the technical field of industrial circulating water treatment. According to the utility model, the scaling tendency of the circulating cooling water is judged in advance on line, and the dosage of the scale and corrosion inhibitor for circulating water is adjusted in time, so that the purpose of improving the concentration ratio can be realized under the condition of not wasting the scale and corrosion inhibitor, and the effect of preventing the circulating cooling water system from scaling can be achieved; meanwhile, the automatic dosing adjustment function can be realized, and the workload of operators is reduced.
Description
Technical Field
The utility model belongs to the technical field of industrial circulating water treatment, and relates to an online dosing adjusting device for a circulating cooling water system.
Background
The water consumption of the circulating cooling water is generally more than 70 percent of the total amount of industrial water. A large amount of redundant heat generated in the production process must be cooled in time by industrial cooling water, otherwise the normal operation of the production is influenced. Open-cycle cooling water systems are one of the most prominent modes of industrial cooling. The corrosion and scale formation of the system are one of the main reasons affecting the safe and stable operation of cooling equipment, water resource saving and energy utilization efficiency, and therefore measures must be taken to slow down or prevent the corrosion and scale formation of a circulating cooling water system.
However, with the increasingly prosperous and competitive industry, more strict environmental protection requirements and more shortage of water resources, enterprises are forced to operate in a safer, more economic and more environment-friendly manner, the concentration rate of circulating cooling water is required to be higher, the water quality is worse, the corrosivity and the scaling property are stronger, and higher requirements are provided for the reliability of an industrial cooling water system. The scale and corrosion inhibitor is an important means for improving the concentration ratio, saving water resources and preventing the corrosion and scaling of a circulating water system.
The scale and corrosion inhibitor has excellent corrosion inhibiting performance on carbon steel, copper and copper alloy, excellent scale and dispersion performance on calcium carbonate and calcium phosphate, but is expensive. For this reason, power plants are typically subjected to dynamic simulation experiments to determine preferred operating parameters and dosing concentrations.
The dosing concentration and the operation parameters determined by a dynamic simulation experiment have the following problems when used on site: (1) the waste is caused by higher dosing concentration; (2) corrosion and scaling are caused by low dosing concentration; (3) the experimental result is greatly different from the dosing concentration in the actual operation, and the dosing concentration cannot be adjusted in time along with the change of the water quality. The main reasons include: the experimental water adopts water quality at a certain time to carry out experiments, and the water quality change in the long-term use process cannot be reflected; the experimental conditions and the actual environment are different.
Disclosure of Invention
The utility model aims to provide an online dosing adjusting device for a circulating cooling water system, which solves the problems that the existing dosing concentration is too high to cause waste, the dosing concentration is too low to cause corrosion and scaling, the experimental result has larger difference with the dosing concentration in actual operation, the dosing concentration cannot be adjusted in time along with the change of water quality and the like in the background technology.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an online dosing adjusting device of a circulating cooling water system comprises a first lifting pump 1, a filter 2, an intermediate water tank 3, a temperature control heater 4, a second lifting pump 5, an experimental pipe 6, a calcium salt metering tank 7, a first standby metering tank 8, a first metering pump 9, a second metering pump 10, a bicarbonate metering tank 11, a second standby metering tank 12, a scale and corrosion inhibitor metering tank 13, a scale and corrosion inhibitor dosing pump 14, a conductivity meter 18, a pH meter 19, a first thermometer 20, a second thermometer 21, a turbidity meter 22 and a PLC (programmable logic controller) 23;
the inlet of the first lift pump 1 is positioned at the middle upper part of the circulating water pool 16 below the circulating cooling water tower 17, and the outlet of the first lift pump is connected with the inlet of the filter 2; the outlet of the filter 2 is connected with a middle water tank 3, and the middle water tank 3 is positioned in a temperature control heater 4, so that the temperature of a water sample in the middle water tank 3 is not lower than the highest temperature of the whole circulating cooling water system; the outlet of the middle water tank 3 is connected to an experimental pipe 6 through a second lifting pump 5; the calcium salt metering tank 7 or the first standby metering tank 8 is connected with the inlet of the experiment pipe 6 through the first metering pump 9, and calcium salt or easily-scaling cation salt solution is filled into the inlet of the experiment pipe 6; the bicarbonate metering tank 11 or the second standby metering tank 12 is connected with the inlet of the experiment tube 6 through the second metering pump 10, bicarbonate radical ions or anion salt solution easy to scale are added into the inlet of the experiment tube 6, and mixing reaction is carried out in the experiment tube 6; the first metering pump 9 and the second metering pump 10 are separated by a preset distance at the position of adding chemicals at the inlet of the experiment pipe 6; the conductivity meter 18, the pH meter 19 and the first thermometer 20 are arranged behind the filter 2 and in front of the intermediate water tank 3; the second thermometer 21 is arranged behind the middle water tank 3 and in front of the experiment tube 6; the turbidity meter 22 is arranged at the outlet of the experiment tube 6; the outlet of the experiment pipe 6 is connected with the inlet of the middle water tank 3, the circulating water pool 16 or the waste water pool 15; the scale and corrosion inhibitor metering tank 13 is connected with a circulating water tank 16 through a scale and corrosion inhibitor dosing pump 14; the input of the PLC 23 is connected with the turbidity meter 22, and the output is connected with the scale and corrosion inhibitor dosing pump 14.
The scale and corrosion inhibitor dosing pump 14 has a frequency conversion adjusting function, and can automatically adjust the frequency through an instruction sent by a PLC (programmable logic controller) so as to change the dosing amount.
The inside of the experimental tube is provided with a mixer which is arranged after the medicine is added.
The experimental tube is one or two of a stainless steel tube and an organic glass tube.
Compared with the prior art, the utility model has the following advantages:
(1) solves the problems of waste caused by high dosing concentration and corrosion and scaling caused by low dosing concentration of the existing circulating cooling water system.
(2) The problem that the existing circulating cooling water dynamic simulation experiment result has great difference with the dosing concentration in actual operation is solved.
(3) Solves the problem that the existing experimental method can not adjust the dosing concentration in time along with the change of water quality.
(4) The problem of current charge device can not realize the automatic reagent feeding adjustment is solved.
Drawings
FIG. 1 is a schematic view of an on-line dosing adjusting device of a circulating cooling water system.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the online chemical feeding adjusting device for a circulating cooling water system in this embodiment includes a first lift pump 1, a filter 2, an intermediate water tank 3, a temperature-controlled heater 4, a second lift pump 5, an experimental pipe 6, a calcium salt metering tank 7, a first standby metering tank 8, a first metering pump 9, a second metering pump 10, a bicarbonate metering tank 11, a second standby metering tank 12, a scale and corrosion inhibitor metering tank 13, a scale and corrosion inhibitor chemical feeding pump 14, a conductivity meter 18, a pH meter 19, a first thermometer 20, a second thermometer 21, a turbidity meter 22, and a PLC controller 23;
the inlet of the first lift pump 1 is positioned at the middle upper part of the circulating water pool 16 below the circulating cooling water tower 17, and the outlet of the first lift pump is connected with the inlet of the filter 2; the outlet of the filter 2 is connected with a middle water tank 3, and the middle water tank 3 is positioned in a temperature control heater 4, so that the temperature of a water sample in the middle water tank 3 is not lower than the highest temperature of the whole circulating cooling water system; the outlet of the middle water tank 3 is connected to an experimental pipe 6 through a second lifting pump 5; the calcium salt metering tank 7 or the first standby metering tank 8 is connected with the inlet of the experiment pipe 6 through the first metering pump 9, and calcium salt or easily-scaling cation salt solution is filled into the inlet of the experiment pipe 6; the bicarbonate metering tank 11 or the second standby metering tank 12 is connected with the inlet of the experiment tube 6 through the second metering pump 10, bicarbonate radical ions or anion salt solution easy to scale are added into the inlet of the experiment tube 6, and mixing reaction is carried out in the experiment tube 6; the first metering pump 9 and the second metering pump 10 are separated by a preset distance at the position of adding chemicals at the inlet of the experiment pipe 6; the conductivity meter 18, the pH meter 19 and the first thermometer 20 are arranged behind the filter 2 and in front of the intermediate water tank 3; the second thermometer 21 is arranged behind the middle water tank 3 and in front of the experiment tube 6; the turbidity meter 22 is arranged at the outlet of the experiment tube 6; the outlet of the experiment pipe 6 is connected with the inlet of the middle water tank 3, the circulating water pool 16 or the waste water pool 15; the scale and corrosion inhibitor metering tank 13 is connected with a circulating water tank 16 through a scale and corrosion inhibitor dosing pump 14; the input of the PLC 23 is connected with the turbidity meter 22, and the output is connected with the scale and corrosion inhibitor dosing pump 14.
As shown in FIG. 1, the online dosing adjusting device for the circulating cooling water system has the following specific implementation modes:
1) the circulating cooling water system operates normally, the scale and corrosion inhibitor amount given by the dynamic simulation test result is added into the circulating water system (the circulating water pool 16 or the circulating water forebay), and the circulating cooling water is continuously concentrated.
2) The first lift pump 1 extracts circulating cooling water for the test of the online dosing adjusting device from the middle upper part of a circulating water pool 16 below a circulating cooling water tower 17, after the circulating cooling water is filtered by a filter 2, the conductivity, the pH value and the temperature of a water sample are measured, the water sample enters an intermediate water tank 3 and is heated to the highest temperature of the running of the circulating cooling water by a temperature control heater 4, the power of the temperature control heater 4 is controlled according to the display value of a second thermometer 21 at the outlet of the intermediate water tank, the heated test water sample is input into an experiment pipe 6 by a second lift pump 5, after quantitative scaling promoting salts are respectively added by a first metering pump 9 and a second metering pump 10, the scaling promoting salts are fully and uniformly mixed by a mixer in the experiment pipe 6, the effluent turbidity of the experiment pipe 6 is measured online by a turbidity meter 22, and the adjustment condition of the dosing concentration rate analysis amount of the circulating water according to the turbidity change condition and the industrial expectation, after the PLC 23 sends out an instruction, the frequency of the scale and corrosion inhibitor dosing pump 14 is automatically changed to adjust the dosing amount, and monitoring is continued so as to adjust the dosing amount in time according to actual conditions.
3) Depending on the turbidity profile of the test tube effluent, the drain can be recycled back to the intermediate tank 3, or to the recycle water sump 16, or directly to the waste water sump 15. When a certain amount of scale-promoting ionic salt is added into the first metering pump 9 and the second metering pump 10 respectively, the turbidity of the water discharged from the experiment pipe 6 is monitored, the stabilization time is longer than 5min or longer, the water discharged from the experiment pipe returns to the inlet of the intermediate water tank 3 to form a circulation loop, and the first lifting pump 1 and the filter 2 stop running; if the turbidity does not change obviously within a certain time, the turbidity is recycled to the circulating water tank 16, and the concentration ratio or the dosage of the scale inhibitor is adjusted and then the online monitoring is continued; when the turbidity rises significantly, indicating that precipitation of calcium carbonate or other compounds has occurred, the test tube effluent is discharged to a wastewater pond 15.
4) When a certain amount of scale-promoting ionic salt is added into the experiment pipe 6 through the first metering pump 9 and the second metering pump 10 respectively, the turbidity is not obviously changed, the concentration ratio of the circulating cooling water system is continuously increased, the concentration ratio is increased at a speed not higher than 0.5 time until the expected concentration ratio is reached, the step 2) is repeated in the period, if the expected concentration ratio is not reached, the turbidity of the effluent of the experiment pipe 6 is increased, a PLC (programmable logic controller) sends an instruction to increase the frequency of a scale and corrosion inhibitor dosing pump 14, and after the dosage of the scale and corrosion inhibitor is increased, the step 2) is continuously repeated; if the turbidity still does not obviously change when the concentration ratio exceeds the expected concentration ratio, sending an instruction by the PLC to reduce the frequency of the scale and corrosion inhibitor dosing pump 14, and continuing to repeat the step 2) after reducing the dosing amount of the scale and corrosion inhibitor until the ideal dosing amount and the expected concentration ratio of the circulating water are reached.
The frequency adjustment of the scale and corrosion inhibitor dosing pump 14 is carried out according to the difference of the dosing pump lift, the concentration of the scale and corrosion inhibitor in the scale and corrosion inhibitor metering tank 13, the water replenishing amount of circulating water and the like, the set value is different, the influence factors are more, the frequency adjustment is preferably determined according to the change of the effective concentration of the scale and corrosion inhibitor in the circulating water on site, and the frequency adjustment of the dosing pump is generally carried out by taking the change of the effective concentration of not more than 0.5mg/L as a standard.
During the steps 2), 3) and 4), the pH value and the conductivity of the circulating water are monitored on line. Monitoring the pH value of the circulating water to ensure that the pH value is within 8.0-9.0, and if the pH value is abnormal, adjusting the amount of sulfuric acid or scale inhibitor added to the circulating water in time; the supervision conductivity is mainly used for preliminarily judging the concentration ratio of the circulating water, and when the concentration ratio is close to an industrial expected value, the periodic check indexes of the circulating water are determined by manually analyzing chloride ions, calcium hardness, full hardness, alkalinity and the like and are used for field actual operation guidance.
The experiment tube 6 can be made of transparent and visible organic glass tubes or stainless steel tubes according to needs, or the two materials are combined and arranged in the online medicine adding adjusting device.
According to the online dosing adjusting device for the circulating cooling water system, the scaling tendency of circulating cooling water is judged in advance online, the dosing amount of the scale and corrosion inhibitor of the circulating water is adjusted in time, the purpose of improving the concentration ratio can be achieved under the condition that the scale and corrosion inhibitor is not wasted, and the effect of preventing the circulating cooling water system from scaling can be achieved; meanwhile, the automatic dosing adjustment function can be realized, and the workload of operators is reduced.
Claims (3)
1. An online dosing adjusting device of a circulating cooling water system is characterized by comprising a first lifting pump (1), a filter (2), a middle water tank (3), a temperature control heater (4), a second lifting pump (5), an experiment pipe (6), a calcium salt metering tank (7), a first standby metering tank (8), a first metering pump (9), a second metering pump (10), a bicarbonate metering tank (11), a second standby metering tank (12), a scale and corrosion inhibitor metering tank (13), a scale and corrosion inhibitor dosing pump (14), a conductivity meter (18), a pH meter (19), a first thermometer (20), a second thermometer (21), a turbidity meter (22) and a PLC (23);
the inlet of the first lift pump (1) is positioned at the middle upper part of a circulating water tank (16) below a circulating cooling water tower (17), and the outlet of the first lift pump is connected with the inlet of the filter (2); the outlet of the filter (2) is connected with a middle water tank (3), and the middle water tank (3) is positioned in the temperature control heater (4), so that the temperature of a water sample in the middle water tank (3) is not lower than the highest temperature of the whole circulating cooling water system; the outlet of the middle water tank (3) is connected to an experimental pipe (6) through a second lifting pump (5); the calcium salt metering tank (7) or the first standby metering tank (8) is connected with the inlet of the experiment pipe (6) through a first metering pump (9), and calcium salt or easily-scaling cation salt solution is filled into the inlet of the experiment pipe (6); the bicarbonate metering tank (11) or the second standby metering tank (12) is connected with the inlet of the experiment tube (6) through a second metering pump (10), bicarbonate ions or an anion salt solution easy to scale are injected into the inlet of the experiment tube (6), and a mixing reaction is carried out inside the experiment tube (6); the first metering pump (9) and the second metering pump (10) are separated by a preset distance at the position of feeding chemicals at the inlet of the experiment pipe (6); the conductivity meter (18), the pH meter (19) and the first thermometer (20) are arranged behind the filter (2) and in front of the intermediate water tank (3); the second thermometer (21) is arranged behind the middle water tank (3) and in front of the experiment tube (6); the turbidity meter (22) is arranged at the outlet of the experiment tube (6); the outlet of the experiment pipe (6) is connected with the inlet of the middle water tank (3), the circulating water pool (16) or the waste water pool (15); the scale and corrosion inhibitor metering tank (13) is connected with a circulating water tank (16) through a scale and corrosion inhibitor dosing pump (14); the input of the PLC (23) is connected with a turbidity meter (22), and the output is connected with a scale and corrosion inhibitor dosing pump (14).
2. The on-line dosing adjusting device of the circulating cooling water system as claimed in claim 1, wherein a mixer is arranged in the experiment pipe (6) and is arranged after dosing.
3. The on-line dosing and adjusting device of the circulating cooling water system as claimed in claim 1, wherein the experimental pipe (6) is one or a combination of a stainless steel pipe and an organic glass pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122312213.6U CN215855370U (en) | 2021-09-23 | 2021-09-23 | Online medicine adjusting device that adds of recirculated cooling water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122312213.6U CN215855370U (en) | 2021-09-23 | 2021-09-23 | Online medicine adjusting device that adds of recirculated cooling water system |
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| Publication Number | Publication Date |
|---|---|
| CN215855370U true CN215855370U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122312213.6U Active CN215855370U (en) | 2021-09-23 | 2021-09-23 | Online medicine adjusting device that adds of recirculated cooling water system |
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| Country | Link |
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| CN (1) | CN215855370U (en) |
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2021
- 2021-09-23 CN CN202122312213.6U patent/CN215855370U/en active Active
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