Neutralization tank regulating method, regulating device and chemical water neutralization tank quantitative automatic control blending system

Abstract

The present application relates to a kind of neutralization pond regulating method, regulating device and chemical water neutralization pond quantitative automatic control blending system, neutralization pond regulating method includes: respectively obtaining the liquid level height and pH value of neutralization pond;Determine whether the pH value of neutralization pond is in preset range;When pH is less than preset range, determine the addition amount of alkali and issue the first instruction for controlling alkali addition;When pH is greater than preset range, determine the addition amount of acid and issue the second instruction for controlling acid addition;According to the first instruction, control corresponding acid addition or according to the second instruction, control corresponding alkali addition;Control the stirring operation of mixed liquor to neutralization pond.The above-mentioned neutralization pond regulating method can determine the addition amount of acid and alkali according to the liquid level height and pH value of neutralization pond and automatically control corresponding acid and alkali addition, can realize automatic blending function, operation is better in convenience, and can reduce the waste of acid and alkali, save cost, and further can reduce energy consumption.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of water treatment, in particular to a neutralization tank adjusting method, an adjusting device and a quantitative automatic control blending system for a chemical water neutralization tank. BACKGROUND

[0002] A lot of wastewater is generated in industry, and the wastewater needs to be treated to reach corresponding standards before being discharged. In one wastewater treatment scenario, the wastewater discharged by the regeneration of the anion bed, the cation bed and the mixed bed of a chemical water treatment system needs to be stored in a neutralization tank. The wastewater in the neutralization tank is acidic or alkaline in terms of pH value. The wastewater discharged by the regeneration of the cation bed is strongly acidic, and the wastewater discharged by the regeneration of the anion bed is strongly alkaline. When the storage of the wastewater in the neutralization tank reaches a preset height, manual adjustment is needed before the wastewater is discharged. For example, when the liquid level of the production control is 3.0 m, the neutralization tank needs to be manually adjusted, and when the water quality reaches the environmental protection discharge standard, the wastewater is discharged by a neutralization pump (pH value: 6.0-9.0). In the prior art, the pH value is tested, and an operator determines the acidity or alkalinity of the water in the neutralization tank by using a simple pH test paper. If the water in the neutralization tank is alkaline, a 30% hydrochloric acid high tank bottom hand valve is opened according to the experience value, and a part of the hydrochloric acid is discharged into the neutralization tank for preliminary tank adjustment and chemical reaction. An industrial air hand valve is opened to fully stir the reaction. After 20 minutes of chemical reaction, the operator determines the acidity or alkalinity of the water in the neutralization tank by using the pH test paper again. If the water is acidic, a 30% alkali high tank bottom hand valve is opened to discharge a part of the alkali into the neutralization tank for blending. After multiple neutralization tank blending, the pH test paper test basically approaches neutrality. The operator of a company laboratory takes a water sample from the neutralization tank for analysis of the pH value. When the pH value data are qualified, the operator of the company laboratory starts the neutralization pump to discharge the water in the neutralization tank to a wastewater field.

[0003] As can be seen from the above, in the prior art, the manual qualitative operation blending mode in the original design of the wastewater blending process operation of the neutralization tank of the chemical water treatment system mainly relies on the experience value and responsibility of the operator. There is no quantitative control procedure in the industry. The time and space operation method is basically an industry blank. Human factors play a leading role and are uncontrollable factors, which directly affect the neutralization tank blending effect. In the operation of the personnel, the excessive addition of liquid alkali to the acidic water in the neutralization tank causes alkaline water, and the excessive addition of hydrochloric acid to the alkaline water causes acidic water, which leads to repeated blending operation. As a result, the neutralization tank blending of the chemical agents hydrochloric acid and liquid alkali is wasted, the industrial air as an auxiliary material is also wasted with time, the operation cost of the personnel is increased, and great economic losses are caused to the industry. In other words, in the prior art, the blending process of the wastewater in the neutralization tank relies on manual operation experience, the blending process is prone to cause excessive addition of acid and alkali, the operation is extremely troublesome, the convenience is poor, and the energy consumption is high. SUMMARY

[0004] Therefore, it is necessary to provide a neutralization tank adjusting method and device and a chemical water neutralization tank quantitative automatic control blending system, which are convenient to operate, can realize automatic blending, reduce waste and reduce energy consumption.

[0005] In a first aspect, the application provides a neutralization tank adjusting method, comprising the following steps:

[0006] acquiring a liquid level height and a pH value of the neutralization tank respectively;

[0007] determining whether the pH value of the neutralization tank is within a preset range;

[0008] when the pH value is less than the preset range, determining an adding amount of alkali according to the liquid level height and the pH value and issuing a first instruction for controlling the adding of alkali; when the pH value is greater than the preset range, determining an adding amount of acid according to the liquid level height and the pH value and issuing a second instruction for controlling the adding of acid;

[0009] controlling the adding of corresponding alkali according to the first instruction or controlling the adding of corresponding acid according to the second instruction;

[0010] controlling a stirring operation on the mixed liquid of the neutralization tank.

[0011] In one of the embodiments, the adding amount of alkali is a descending height h of alkali in an alkali tank, and the adding amount of acid is a descending height h of acid in an acid tank; wherein in the first instruction, the adding amount of alkali is determined by the following formula:

[0012] h={(10 -pH )×S 池 ×M×10 6}÷{(C 碱 ÷40)÷S 罐}

[0013] wherein the alkali is sodium hydroxide, the pH value is the pH value of the neutralization tank before the adding of alkali, S 池 is an area of the neutralization tank, M is the liquid level height of the neutralization tank before the adding of alkali, C 碱 is a concentration of the alkali, and S 罐 is an area of the alkali tank;

[0014] In the second instruction, the adding amount of acid is determined by the following formula:

[0015] h={(10 pH-14 )×S 池 ×M×10 6}÷{(C 酸 ÷36.5)÷S 罐}

[0016] Wherein, the acid liquor is hydrochloric acid, the pH is the pH value of the neutralization tank before the acid liquor is added, S 池 is the area of the neutralization tank, M is the liquid level height of the neutralization tank before the acid liquor is added, C 酸 is the concentration of the acid liquor, S 罐 is the area of the acid liquor tank.

[0017] In one of the embodiments, the step of controlling the stirring operation of the mixed liquor in the neutralization tank comprises: stirring the mixed liquor in the neutralization tank by introducing industrial wind.

[0018] In one of the embodiments, the step of stirring the mixed liquor in the neutralization tank by introducing industrial wind comprises:

[0019] determining the total wind volume and the tank adjusting time of the industrial wind;

[0020] stirring the mixed liquor in the neutralization tank by introducing industrial wind according to the total wind volume and the tank adjusting time, wherein the stirring operation time is the tank adjusting time.

[0021] In one of the embodiments, the tank adjusting time T and the total wind volume Q of the industrial wind are determined according to the following formula:

[0022]

[0023] Q = T x q

[0024] Wherein, T is the tank adjusting time, Q is the total wind volume of the industrial wind, q is the wind volume speed of the industrial wind, and M1 is the liquid level height after the neutralization tank is added with the alkali liquor or the acid liquor.

[0025] In the second aspect, the application provides a neutralization tank adjusting device, which comprises a neutralization tank, an acid liquor tank, an acid liquor control valve, an alkali liquor tank, an alkali liquor control valve, a pH meter, a liquid level meter, an industrial wind control valve, and a controller. The acid liquor tank is connected to the neutralization tank through the acid liquor control valve, the alkali liquor tank is connected to the neutralization tank through the alkali liquor control valve, the pH meter and the liquid level meter are arranged in the neutralization tank, the neutralization tank has an air inlet channel for the industrial wind to be introduced for stirring, the industrial wind control valve is arranged on the air inlet channel, and the controller is electrically connected to the acid liquor control valve, the alkali liquor control valve, the pH meter, the liquid level meter, and the industrial wind control valve. The controller is used to execute the neutralization tank adjusting method as described in any one of the above embodiments.

[0026] In one of the embodiments, the pH meter is a remote pH meter, and the liquid level meter is a remote liquid level meter.

[0027] In one of the embodiments, the neutralization tank further has a discharge channel for discharging waste water, and a neutralization pump is arranged on the discharge channel, and the discharge outlet of the neutralization pump has two channels, one of which is communicated with the neutralization tank, and the other outer channel is used for discharging waste water.

[0028] In one of the embodiments, the controller is a DCS controller.

[0029] In a third aspect, the application further provides a chemical water neutralization tank quantitative automatic control blending system, which comprises the neutralization tank adjusting device or adopts the neutralization tank adjusting method according to any one of the above embodiments.

[0030] The above-mentioned neutralization tank adjusting method can determine the amount of acid and alkali to be added according to the liquid level and pH value of the neutralization tank and automatically control the corresponding addition of acid and alkali. Compared with the traditional manual operation experience-based method, the neutralization tank adjusting method provided by the application can realize automatic addition of acid and alkali in the neutralization tank, can realize automatic blending function, has good operation convenience, can reduce the waste of acid and alkali, and saves cost. Since the addition of acid and alkali is reduced, waste, the energy consumption caused by futile stirring operation can be avoided, and the energy consumption can be further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A step schematic diagram of the neutralization tank adjusting method of one embodiment;

[0032] Figures 2 to 5 A result diagram of an Ansys model analysis in the process of calculating the industrial air ventilation volume in the neutralization tank adjusting method of the application;

[0033] Figure 6 A structure schematic diagram of the neutralization tank adjusting device of one embodiment. DETAILED DESCRIPTION

[0034] For the purpose of facilitating the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below in conjunction with the drawings. In the following description, a large number of specific details are set forth in order to provide a sufficient understanding of the present application, and the preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. The present application can be implemented in many different ways from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art in the technical field to which the present application belongs. The terms used herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] In a first aspect, referring to Figure 1 The present application provides a neutralization tank adjusting method, comprising the following steps:

[0036] S110: respectively acquiring the liquid level height and the pH value of the neutralization tank;

[0037] In the embodiment, by respectively acquiring the liquid level height and the pH value of the neutralization tank, calculation basis is provided for subsequent addition of acid and alkali, and the amount of acid and alkali added in the neutralization tank is accurately controlled. Specifically, the pH value of the neutralization tank is acquired by a pH meter, and the liquid level height of the neutralization tank is acquired by a liquid level meter. For example, the pH meter is a remote pH meter, which can transmit the monitored pH data to an external controller through a cable or wirelessly. For example, the liquid level meter is a remote liquid level meter, which can transmit the monitored liquid level height to an external controller through a cable or wirelessly.

[0038] S120: judging whether the pH value of the neutralization tank is within a preset range, otherwise performing the subsequent steps;

[0039] In the embodiment, it is judged whether to adjust the neutralization tank based on the pH value, and when the pH of the neutralization tank is within the preset range, the wastewater of the neutralization tank can be directly discharged. Alternatively, the preset range is 6≤pH≤9, in other words, the preset range of the pH is within the range of 6-9. Of course, in actual application, the preset range can be flexibly adjusted as needed.

[0040] S130: When the pH is less than the preset range, the amount of alkali added is determined according to the liquid level and the pH value, and a first instruction for controlling the addition of alkali is issued; when the pH is greater than the preset range, the amount of acid added is determined according to the liquid level and the pH value, and a second instruction for controlling the addition of acid is issued.

[0041] In the embodiment, when the pH is less than the preset range, the amount of alkali added is determined according to the liquid level and the pH value, and a first instruction for controlling the addition of alkali is issued, and when the pH is greater than the preset range, the amount of acid added is determined according to the liquid level and the pH value, and a second instruction for controlling the addition of acid is issued; thus the corresponding acid or alkali is controlled by issuing the first instruction or the second instruction.

[0042] In actual application, the amount of acid or alkali added can be determined based on the concentration of acid, the concentration of alkali, the volume of the liquid level of the neutralization tank, and the pH value. Of course, considering that the volume of the liquid level of the neutralization tank is usually the area multiplied by the liquid level height, and the area is usually constant, the liquid level height can be measured.

[0043] In a specific embodiment, the amount of acid or alkali added can be determined by combining the matlab-based and DCS700 operation methods. Specifically, the input value of the remote pH of the neutralization tank is calculated, the existing pH value and the liquid level height of the remote liquid level meter are calculated in a controller such as a central control DCS operator, and the acid or alkali is added after the calculation, and then the acid or alkali is added. Subsequent specific embodiments are given to illustrate how to determine the amount of acid or alkali added. Of course, it should be noted that the determination process of the amount of acid or alkali added is not limited to this.

[0044] S140: According to the first instruction, the corresponding alkali is added or according to the second instruction, the corresponding acid is added.

[0045] In the embodiment, the first instruction is used to control the addition of the alkali liquid, and the second instruction is used to control the addition of the acid liquid, so that the pH of the wastewater in the neutralization tank reaches a preset range or approaches to neutral under the action of the acid liquid or the alkali liquid. In this way, the addition of the acid liquid or the alkali liquid can be determined according to the liquid level and the pH of the neutralization tank, and the corresponding addition of the acid liquid or the alkali liquid can be automatically controlled. Compared with the traditional manual operation experience, the neutralization tank adjusting method provided by the application can realize the automatic addition of the acid liquid or the alkali liquid, can realize the automatic adjustment function, has good operation convenience, can reduce the waste of the acid liquid or the alkali liquid, and can save the cost.

[0046] S150: control the stirring operation of the mixed liquid in the neutralization tank.

[0047] In the embodiment, after the addition of the acid liquid or the alkali liquid, the stirring operation of the mixed liquid in the neutralization tank is controlled, so that the pH of the wastewater in the neutralization tank is quickly adjusted by the acid liquid or the alkali liquid. Of course, the stirring operation mode can be some common stirring modes in the field, including but not limited to electric stirring, pneumatic stirring and the like. In a specific embodiment, industrial wind is used for stirring operation based on industrial wind. Of course, it should be noted that the industrial wind stirring mode can refer to the prior art, and the specific implementation process of the industrial wind stirring mode will not be described herein.

[0048] The above-mentioned neutralization tank adjusting method can determine the addition of the acid liquid or the alkali liquid according to the liquid level and the pH of the neutralization tank, and automatically control the corresponding addition of the acid liquid or the alkali liquid. Compared with the traditional manual operation experience, the neutralization tank adjusting method provided by the application can realize the automatic addition of the acid liquid or the alkali liquid, can realize the automatic adjustment function, has good operation convenience, can reduce the waste of the acid liquid or the alkali liquid, and can save the cost. Because the addition of the acid liquid or the alkali liquid is reduced, the energy waste caused by the futile stirring operation can be avoided, and the energy consumption can be further reduced.

[0049] In order to better confirm the addition of the alkali liquid, in one of the embodiments, the addition of the alkali liquid is the falling height h of the alkali liquid in the alkali liquid tank, and in the first instruction, the addition of the alkali liquid is determined by the following formula:

[0050] h = {(10 -pH ) × S 池 × M × 10 6} ÷ {(C 碱 ÷ 40) ÷ S 罐}

[0051] In the above formula, the alkali liquid is sodium hydroxide, pH is the pH of the neutralization tank before the addition of the alkali liquid, S 池 is the area of the neutralization tank, M is the liquid level of the neutralization tank before the addition of the alkali liquid, C 碱 is the concentration of the alkali liquid, and S 罐The area of the lye tank.

[0052] By using the above formula, the addition amount of lye can be accurately determined, and waste of lye can be avoided. In this embodiment, the addition amount of lye is the drop height h of lye in the lye tank. In specific application, the addition amount can be directly determined based on the drop height of lye in the lye tank, and of course, the lye measuring tank can also be directly used to determine the addition height of lye. When the addition amount is determined based on the drop height of lye tank, a corresponding liquid level meter is usually arranged in the lye tank, and preferably, the liquid level meter is also connected to an external controller, so as to ensure the addition amount of lye by monitoring the drop of liquid level in the lye tank.

[0053] In actual application, it is considered that the lye tank can be only a common liquid storage tank, and therefore, the addition of lye can also be determined by a relatively small lye measuring tank. In one embodiment, the addition amount of lye is the drop height h of lye in the lye measuring tank, and in the first instruction, the addition amount of lye is determined by the following formula:

[0054] h={(10 -pH )×S 池 ×M×10 6}÷{(C 碱 ÷40)÷S 罐}

[0055] In the above formula, the lye is sodium hydroxide, the pH is the pH value of the neutralization tank before the lye is added, S 池 is the area of the neutralization tank, M is the liquid level height of the neutralization tank before the lye is added, C 碱 is the concentration of lye, and S 罐 is the area of the lye measuring tank. In this embodiment, the addition amount of lye can be determined based on the lye measuring tank. The lye in the lye tank is controlled to flow into the lye measuring tank to a certain height, and then the lye in the lye tank is added into the lye measuring tank, and then the lye in the lye measuring tank flows into the neutralization tank.

[0056] In order to better determine the addition amount of acid, in one embodiment, the addition amount of acid is the drop height h of acid in the acid tank; and in the second instruction, the addition amount of acid is determined by the following formula:

[0057] h={(10 pH-14 )×S 池 ×M×10 6}÷{(C 酸 ÷36.5)÷S 罐}

[0058] In the above formula, the acid is hydrochloric acid, the pH is the pH value of the neutralization tank before the acid is added, S 池 is the area of the neutralization tank, M is the liquid level height of the neutralization tank before the acid is added, C酸 S is the concentration of the acid liquid 罐 S is the area of the acid liquid tank.

[0059] By using the above formula, the addition amount of the acid liquid can be accurately determined, and waste of the acid liquid can be avoided. In the embodiment, the addition amount of the acid liquid is the drop height h of the acid liquid in the acid liquid tank. In specific application, the addition amount of the acid liquid can be directly determined based on the drop height of the acid liquid in the acid liquid tank, and of course, the addition height of the acid liquid can also be directly determined by using the acid liquid measuring tank. When the addition amount is determined based on the drop height of the acid liquid tank, a corresponding liquid level meter is usually arranged in the acid liquid tank, and preferably, the liquid level meter is also connected to an external controller, so as to ensure the addition amount of the acid liquid by monitoring the drop of the liquid level in the acid liquid tank.

[0060] In actual application, it is considered that the acid liquid tank can be only a common liquid storage tank, and therefore, the addition of the acid liquid can also be determined by a relatively small acid liquid measuring tank. In one of the embodiments, the addition amount of the acid liquid is the drop height h of the acid liquid in the acid liquid measuring tank. In the second instruction, the addition amount of the acid liquid is determined by the following formula:

[0061] h = {(10 pH-14 ) × S 池 × M × 10 6} ÷ {(C 酸 ÷ 36.5) ÷ S 罐}

[0062] In the above formula, the acid liquid is hydrochloric acid, pH is the pH value of the neutralization tank before the addition of the acid liquid, S 池 is the area of the neutralization tank, M is the liquid level height of the neutralization tank before the addition of the acid liquid, C 酸 is the concentration of the acid liquid, and S 罐 is the area of the acid liquid measuring tank. In the embodiment, the addition amount of the acid liquid can be determined based on the acid liquid measuring tank. The acid liquid in the acid liquid tank is controlled to flow into the acid liquid measuring tank to a certain height, and then the acid liquid in the acid liquid tank is added into the acid liquid measuring tank, and then the acid liquid in the acid liquid measuring tank flows into the neutralization tank.

[0063] In one of the embodiments, the determination process of the addition amount of the acid liquid and the determination process of the addition amount of the alkali liquid can be based on the matlab and DCS700 operation methods to determine the addition amount of the acid liquid or the addition amount of the alkali liquid. Specifically, a corresponding calculation method is arranged in the logic module of the controller, and for example, the controller is a DCS controller.

[0064] In order to better stir the neutralization tank and reduce energy consumption and cost, in one of the embodiments, the step of controlling the stirring operation of the mixed liquid in the neutralization tank comprises: introducing industrial wind into the mixed liquid in the neutralization tank to perform the stirring operation. In the embodiment, by using the industrial wind stirring method in the prior art, the energy consumption can be reduced, and the cost can be reduced.

[0065] In one embodiment, the step of passing industrial air into the mixed solution of the neutralization tank for stirring operation comprises:

[0066] determining the total air volume and the tank adjustment time of the passing industrial air;

[0067] According to the total air volume and the tank adjustment time, the mixed solution of the neutralization tank is passed into the industrial air for stirring operation, and the stirring operation time is the tank adjustment time.

[0068] In this way, by determining the total air volume and the tank adjustment time of the passing industrial air, the stirring time can be further accurately controlled, so as to ensure that the stirring is effectively completed under the premise of reducing the stirring time, and the energy consumption of the neutralization adjustment process is further reduced. In this embodiment, the tank adjustment time can also be understood as the time based on the industrial air stirring.

[0069] In a specific embodiment, the determination of the total air volume and the tank adjustment time can be calculated by using the Ansys model, based on the matrix and the matlab simulation neural system, and the relationship between the time, air volume and neutralization tank depth obtained by deviation verification and deblurring can be determined. Further explanation is as follows.

[0070] In order to further reduce the energy consumption of the passing industrial air for stirring, the applicant further studies the passing of the industrial air, in order to save cost and reduce the operation intensity of personnel, and also studies the operation air volume, the tank adjustment time and the tank depth. The above automatic tank adjustment device emphasizes the air volume and the use time of the air after adding the acid and alkali liquid to the neutralization tank. Therefore, the existing device of the applicant is tested, the Ansys model is used for calculation research, and the specific conditions are as follows, and the applicant experimental graph is shown in FIG. 2 to Figure 5 The applicant found that the optimal adjustment time and the minimum air volume relationship can be found in the practice when the pH range of 6-9 is taken as the research object, the adjustment time is 54.2 min when the air volume is 70 m 3 / h; the adjustment time is 35.4 min when the air volume is 90 m 3 / h; the adjustment time is 9.1 min when the air volume is 110 m 3 / h; the adjustment time is 18.6 min when the air volume is 18.6 m 3 / h; it is not that the larger the air volume is, the better, and large air volume will cause large disturbance in the neutralization tank, and small air volume will lengthen the tank adjustment time and increase the use of total air volume and unnecessary personnel.

[0071] For the above summary, the applicant uses the practical deployment method to study the time, air volume, and neutralization tank depth, and uses matrix and matlab simulation neural system for calculation. The relationship between time, air volume, and neutralization tank depth obtained by deviation verification and deblurring is as follows:

[0072] In one embodiment, the determination of the industrial air regulating tank time T and the total air volume Q is determined according to the following formula:

[0073]

[0074] Q=T x q

[0075] Where T is the regulating tank time, Q is the total air volume of the industrial air, q is the air volume speed of the industrial air, and M1 is the liquid level height after adding lye or acid in the neutralization tank.

[0076] Thus, the linear relationship between time, air volume, and neutralization tank depth can be determined, and the minimum value of the regulating tank time can be calculated in advance.

[0077] In a specific application, the above operation process can be designed in a controller based on the input q in the line module. After the air volume q and the neutralization tank depth M are input, the central control DCS calculator calculates and outputs the time T, and the industrial air valve is closed after T time. In this way, the operation air volume of the industrial air can be reduced, the deployment time can be further shortened, the total air volume can be reduced, the personnel standing time can be reduced, and the energy consumption can be greatly reduced to further reduce the operation cost.

[0078] The beneficial effects of the above neutralization tank regulating method are also found by the applicant:

[0079] 1. Change the neutralization tank blending control method of the chemical water treatment system from the original qualitative manual operation to quantitative remote automatic control. Field simulation test shows that the neutralization tank blending operation time is shortened from 2 hours to about 0.7 hours, and the neutralization tank blending work efficiency is increased by more than 50%.

[0080] 2. The process treatment technology of the neutralization tank quantitative automatic control blending of the chemical water treatment system can save 25.3% of the acid and lye agent consumption, reduce the air volume by 34.7%, reduce the personnel standing time by 40%, and achieve an economic benefit of about 458,000 yuan per year.

[0081] The neutralization tank adjusting method can determine the amount of acid and alkali to be added and automatically control the addition of the corresponding acid and alkali according to the liquid level and pH value of the neutralization tank. Compared with the traditional manual operation experience-based method, the neutralization tank adjusting method provided by the application can realize automatic addition of acid and alkali in the neutralization tank, can realize automatic adjustment, has good operation convenience, can reduce the waste of acid and alkali, and can save costs. Because the addition of acid and alkali is reduced, waste is reduced, energy consumption caused by futile stirring operation can be avoided, and energy consumption can be further reduced.

[0082] In a second aspect, the application provides a neutralization tank adjusting device, which refers to Figure 6 The neutralization tank adjusting device comprises a neutralization tank 11, an acid liquid tank 12, an acid liquid control valve 13, an alkali liquid tank 14, an alkali liquid control valve 15, a pH meter 16, a liquid level meter 17, an industrial air control valve 18, and a controller 19. The acid liquid tank 12 is connected to the neutralization tank 11 through the acid liquid control valve 13. The alkali liquid tank 14 is connected to the neutralization tank 11 through the alkali liquid control valve 15. The pH meter 16 and the liquid level meter 17 are arranged in the neutralization tank 11. The neutralization tank 11 has an air inlet passage for industrial air to enter and stir. The industrial air control valve 18 is arranged on the air inlet passage. The controller (19-1, 19-2) is electrically connected to the acid liquid control valve 13, the alkali liquid control valve 15, the pH meter 16, the liquid level meter 17, and the industrial air control valve 18, respectively. The acid liquid control valve 13, the alkali liquid control valve 15, the pH meter 16, the liquid level meter 17, and the industrial air control valve 18 are controlled by the controller. The figure shows an example of two controllers. Of course, only one controller can be used in actual application to achieve similar functions. The controller is used to execute the neutralization tank adjusting method as described in any of the above embodiments.

[0083] In a specific embodiment, the neutralization tank adjusting device further comprises an acid liquid metering tank 21, an acid liquid metering control valve 22, an alkali liquid metering tank 23, and an alkali liquid metering control valve 24. The acid liquid tank 12 is connected to the neutralization tank 11 in sequence through the acid liquid control valve, the acid liquid metering tank 21, and the acid liquid metering control valve 22. The alkali liquid tank 14 is connected to the neutralization tank 11 in sequence through the alkali liquid tank 14, the alkali liquid control valve 15, the alkali liquid metering tank 23, and the alkali liquid metering control valve 24. The alkali liquid metering control valve 24 and the acid liquid metering control valve 22 are connected to the controller and are controlled by the controller.

[0084] In one embodiment, the neutralization tank adjusting device is applied to the neutralization tank adjusting method as described in any of the above embodiments. The controller obtains the pH and liquid level of the neutralization tank through the pH meter 16 and the liquid level meter 17, and controls the addition of acid or alkali according to the corresponding control valve. The controller controls the stirring operation of the mixed solution in the neutralization tank according to the control time of the industrial fan control valve 18. In one embodiment, the neutralization tank adjusting device further comprises an industrial fan. The controller sends the determined total air volume data to the industrial fan, and the industrial fan delivers the corresponding total air volume and determines the air volume speed. Of course, in actual application, the air volume speed is usually a fixed value. For example, the acid tank is a 30% hydrochloric acid high tank. For another example, the volume of the acid tank is 35 cubic meters. For example, the alkali tank is a 30% liquid alkali high tank. For another example, the volume of the alkali tank is 35 cubic meters. For another example, the liquid level in the acid metering tank and the alkali metering tank can be tested by itself. Of course, it can also be read manually based on the scale and controlled appropriately.

[0085] In one embodiment, the pH meter is a remote pH meter, and the liquid level meter is a remote liquid level meter. In this way, the pH meter is a remote pH meter, which can transmit the monitored pH data to the external controller through a cable or wirelessly. The liquid level meter is a remote liquid level meter, which can transmit the monitored liquid level to the external controller through a cable or wirelessly.

[0086] In one embodiment, the neutralization tank further has a discharge channel for discharging wastewater, and a neutralization pump 20 is arranged on the discharge channel. The discharge outlet of the neutralization pump has two channels, one of which is connected to the neutralization tank, and the other is used to discharge wastewater. For another example, a corresponding control valve is arranged on each of the two discharge channels. In one embodiment, the controller is a DCS controller. Of course, the controller is not limited to this.

[0087] The neutralization tank adjusting device adopts the above-mentioned neutralization tank adjusting method. According to the liquid level and pH value of the neutralization tank, the addition amount of acid and alkali can be determined and automatically controlled. Compared with the traditional manual operation experience-based method, the neutralization tank adjusting method provided by the present application can realize automatic addition of acid and alkali in the neutralization tank, realize automatic adjustment function, have good operation convenience, and can reduce the waste of acid and alkali and save costs. Because the addition of acid and alkali is reduced, energy waste caused by futile stirring operation can be avoided, and energy consumption can be further reduced.

[0088] In a third aspect, the application also provides a chemical water neutralization tank quantitative automatic control blending system, which comprises the neutralization tank adjusting device or adopts the neutralization tank adjusting method described in any of the above embodiments. Specifically, the chemical water neutralization tank quantitative automatic control blending system comprises the neutralization tank adjusting device and an industrial fan, and the industrial fan is connected to the neutralization tank through the industrial fan control valve.

[0089] The chemical water neutralization tank quantitative automatic control blending system adopts the neutralization tank adjusting method, and can determine the amount of acid and alkali to be added and automatically control the corresponding addition of acid and alkali according to the liquid level and pH value of the neutralization tank. Compared with the traditional manual operation experience-based method, the neutralization tank adjusting method provided by the application can realize automatic addition of acid and alkali in the neutralization tank, can realize automatic blending function, has good operation convenience, can reduce the waste of acid and alkali, and saves cost. Since the addition of acid and alkali is reduced, the waste of energy caused by futile stirring operation can be avoided, and the energy consumption can be further reduced. The neutralization tank quantitative automatic control blending device of the chemical water treatment system developed by the application can accurately calculate the amount of acid and alkali to be added in the neutralization tank blending reaction, the amount of air to be used, and the automatic stop time of air through the logic algorithm of the controller DCS operator, and can realize automatic blending operation by means of the remote control valve at the inlet and outlet of the metering tank and the remote control valve of the industrial fan. On the one hand, the time for neutralization tank blending operation can be reduced, the work efficiency can be improved, and the labor cost can be saved. On the other hand, the amount of chemical additives, acid and alkali, and the amount of industrial air consumed in the neutralization tank blending of the chemical water treatment system can be greatly reduced, the operation cost of desalted water can be reduced, and certain economic benefits can be created for enterprises.

[0090] In the application, the neutralization tank quantitative blending device of the chemical water treatment system is disclosed, and specifically relates to a chemical water treatment neutralization tank quantitative automatic control blending device based on a matlab and DCS700 operation method, which can more scientifically and effectively blend the water quality of the neutralization tank, reduce the amount of chemical additives, acid and alkali, and the amount of industrial air consumed in the neutralization tank blending of the chemical water treatment system to a high degree of automation, reduce the operation cost of desalted water, and create certain economic benefits for enterprises. The scheme provided by the application is as follows:

[0091] In the first stage, the input value of the remote pH of the neutralization tank is calculated, the existing pH value and the remote liquid level meter M value are calculated in the controller DCS operator, the calculation result is screened to add acid / alkali, then the acid / alkali is placed in the metering tank from the high tank, and then the acid / alkali is discharged from the metering tank to the inside of the neutralization tank.

[0092] The second section is calculated by the input value of the air volume q after the acid / alkali metering tank is discharged into the neutralization tank, and the existing q value and the remote liquid level meter M value are calculated in the central control DCS calculator. According to the demand, the total air volume Q is minimized or the time T is shortest, the automatic control of industrial air is realized, and the economic requirements are realized. The operation formula is shown in the previous embodiment.

[0093] Since the patent mainly saves cost and reduces the operating strength of personnel as the main point, the operating air volume, the neutralization tank deployment time and the neutralization tank depth are also studied. After the acid and alkali liquid is added to the neutralization tank, the above-mentioned automatic tank device emphasizes the air volume and the use time of the air. Therefore, the existing device is tested, and the Ansys model is used to calculate the specific situation Figures 2 to 5 Further, the determination formula of the air volume is obtained. Since the linear relationship between the time, the air volume and the neutralization tank depth is studied, the minimum value can be calculated in advance, and then q is input in the running module. When the air volume q and the neutralization tank depth M are input, the central control DCS calculator calculates and outputs the time T. The industrial air valve 6 is closed after T time. The neutralization tank quantitative automatic control and blending device of the chemical water treatment system developed by the application calculates the amount of acid and alkali added, the air volume used and the automatic air stop time by the logic algorithm of the central control DCS calculator according to the pH value and the liquid level of the neutralization tank waste water running control parameter. The automatic blending operation is realized by relying on the remote control valve of the metering tank inlet and outlet and the remote control valve of the industrial air. On the one hand, the time of the neutralization tank blending operation can be reduced, the work efficiency can be improved, and the labor cost can be saved. On the other hand, the amount of chemical additives, acid and alkali used in the neutralization tank blending of the chemical water treatment system can be greatly reduced, the industrial air volume can be reduced, the desalted water operation cost can be reduced, and certain economic benefits can be created for enterprises.

[0094] The beneficial effects of the application are:

[0095] 1. The neutralization tank blending control mode of the chemical water treatment system is changed from the original qualitative manual operation to the quantitative remote automatic control mode. Field simulation test shows that the neutralization tank blending operation time is shortened from 2 hours to about 0.7 hours, and the neutralization tank blending work efficiency is increased by more than 50%.

[0096] 2. The neutralization tank quantitative automatic control blending process treatment technology of the chemical water treatment system can save 25.3% of the acid and alkali reagent consumption, reduce 34.7% of the air volume, reduce 40% of the personnel on-site time, and realize an economic benefit of about 458,000 yuan per year through field simulation test comparison.

[0097] Any technical features in the above-described embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations are described, however, it is understood that the scope of the present disclosure encompasses all possible combinations. It should be noted that the terms "in an embodiment", "for example", "for instance", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example", "for example",

Claims

1. A method of neutralizing basin regulation, characterized by, The method comprises the following steps: respectively acquiring the liquid level height and pH value of the neutralization tank; judging whether the pH value of the neutralization tank is within a preset range; when the pH value is less than the preset range, determining the amount of alkali to be added according to the liquid level height and the pH value and issuing a first instruction for controlling the addition of alkali; when the pH value is greater than the preset range, determining the amount of acid to be added according to the liquid level height and the pH value and issuing a second instruction for controlling the addition of acid; controlling the corresponding addition of alkali according to the first instruction or controlling the corresponding addition of acid according to the second instruction; controlling the mixing liquid in the neutralization tank to be stirred by industrial wind, and the stirring operation comprises the following steps: determining the total amount of industrial wind to be introduced and the tank adjusting time; according to the total amount of industrial wind and the tank adjusting time, the mixing liquid in the neutralization tank is stirred by industrial wind, and the stirring operation time is the tank adjusting time; the tank adjusting time T and the total amount Q of industrial wind are determined according to the following formula: wherein T is the tank adjusting time, Q is the total amount of industrial wind to be introduced, q is the wind speed of industrial wind to be introduced, and M1 is the liquid level height after the addition of alkali or acid in the neutralization tank.

2. The neutralization basin conditioning method of claim 1, wherein, The amount of alkali to be added is the drop height h of alkali in the alkali tank, and the amount of acid to be added is the drop height h of acid in the acid tank; wherein in the first instruction, the amount of alkali to be added is determined according to the following formula: wherein the alkali is sodium hydroxide, pH is the pH value of the neutralization tank before the alkali is added, S 池 is the area of the neutralization tank, M is the liquid level height of the neutralization tank before the alkali is added, C 碱 is the concentration of the alkali, S 罐 is the area of the alkali tank; in the second instruction, the amount of acid to be added is determined according to the following formula: Wherein the acid liquor is hydrochloric acid, pH is the pH value of the neutralizing tank before the acid liquor is added, S 池 is the area of the neutralizing tank, M is the liquid level height of the neutralizing tank before the acid liquor is added, C 酸 is the concentration of the acid liquor, S 罐 is the area of the acid liquor tank.

3. A neutralizing basin conditioning device characterized by, The neutralization tank, the acid tank, the acid control valve, the alkali tank, the alkali control valve, the pH meter, the liquid level meter, the industrial wind control valve and the controller are connected, the acid tank is connected to the neutralization tank through the acid control valve, the alkali tank is connected to the neutralization tank through the alkali control valve, the pH meter and the liquid level meter are arranged in the neutralization tank, the neutralization tank has an air inlet passage for industrial wind to be introduced for stirring, the air inlet passage is provided with the industrial wind control valve, the controller is electrically connected with the acid control valve, the alkali control valve, the pH meter, the liquid level meter and the industrial wind control valve, and the controller is used to execute the neutralization tank adjusting method as claimed in claim 1 or 2.

4. The neutralizing basin conditioning apparatus of claim 3, wherein, The pH meter is a remote pH meter, and the liquid level meter is a remote liquid level meter.

5. The neutralizing basin conditioning apparatus of claim 3, wherein, The neutralization tank further has a discharge passage for discharging wastewater, the discharge passage is provided with a neutralization pump, and the discharge outlet of the neutralization pump has two passages, one of which is connected to the neutralization tank, and the other is used to discharge wastewater.

6. The neutralizing basin conditioning device of any one of claims 3-5, wherein, The controller is a DCS controller.

7. A chemical water neutralization tank dosing system, characterized by, The neutralization tank adjusting device as claimed in any one of claims 3 to 6 or the neutralization tank adjusting method as claimed in claim 1 or 2 is adopted.

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