Automatic slurry density regulation and control method
By calculating and filling the required water and raw slurry in the slurry storage and slurry system, the slurry density is automatically adjusted, and the problem of difficult slurry density in the existing system is solved, achieving efficient preparation and reducing waste.
Patent Information
- Application Number
- CN202411872255.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-04-08
AI Technical Summary
The existing deep-mixed cement soil anti-seepage wall slurry storage and delivery system is difficult to effectively regulate the slurry density when facing different construction conditions, resulting in slurry waste and low preparation efficiency.
By obtaining the initial volume, initial density, total capacity, slurry density and target density in the slurry bucket, calculate the minimum volume of water and slurry that needs to be filled, and automatically adjust the slurry density to avoid unnecessary slurry discharge and remix.
Automatic regulation of slurry density is achieved, slurry waste is reduced, slurry preparation efficiency is improved, and it can meet different construction needs.
Smart Images
Figure CN119781538A_ABST
Abstract
Description
Technical Field
[0001] The present invention generally relates to the technical field of slurry mixing, and in particular to a method for automatically controlling slurry density. Background Art
[0002] The existing deep mixing milling cement soil anti-seepage wall slurry storage and delivery (slurry delivery) system is mainly composed of a slurry delivery pump at a slurry making station, a slurry delivery pipeline, a transfer slurry storage box with a low-speed mixer, a slurry discharge valve, a slurry discharge pump and a slurry discharge pipeline. From a functional point of view, it is just a simple slurry delivery system. When the slurry storage box receives and delivers slurry, the on-site staff determines whether slurry needs to be delivered according to the actual needs of the site, and then completes the corresponding slurry delivery work.
[0003] In different construction situations, the required slurry concentration is also different. When the construction is completed at one site, there will be some slurry left in most cases. When the construction is carried out at another site, the required slurry concentration will also be different. The general practice is to discharge the remaining slurry, and re-inject the required proportion of original slurry and water into the slurry storage barrel, and stir and mix to obtain the slurry of the required concentration.
[0004] The above method of discharging all the remaining slurry causes unnecessary waste; and when the slurry demand is large, preparing slurry of corresponding concentration in the above method will lead to low preparation efficiency and heavy preparation load of the slurry storage tank; even full load preparation is difficult to meet the demand. Summary of the invention
[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a method for automatically controlling slurry density.
[0006] The present invention provides a method for automatically controlling slurry density, comprising: Obtaining the initial volume and initial density of the current slurry in the slurry storage tank, the total capacity of the slurry storage tank, the standard original slurry density, and the target density that the slurry needs to reach; Calculate the first volume and the second volume according to the initial volume, initial density, standard original slurry density and target density; the first volume is the minimum volume of water that needs to be added for the slurry to reach the target density; the second volume is the minimum volume of original slurry that needs to be added for the slurry to reach the target density; Calculating the sum of the first volume, the second volume and the initial volume to obtain a total volume; If the total volume is less than or equal to the total capacity, the first volume of water and the second volume of raw pulp are added into the pulp storage barrel.
[0007] According to the technical solution provided by the present invention, the method further includes: If the total volume is greater than the total capacity, and the initial density is less than the target density, then the third volume of slurry that needs to be discharged from the slurry storage barrel when the volume of slurry with the target density is equal to the total capacity, and the fourth volume of raw slurry that needs to be added to the slurry storage barrel are calculated based on the standard raw slurry density, the initial density and the target density; The third volume of slurry in the slurry storage barrel is discharged, and raw slurry is injected into the slurry storage barrel according to the fourth volume, and the slurry with the target density is obtained by mixing.
[0008] According to the technical solution provided by the present invention, raw slurry is injected into the slurry storage barrel according to the fourth volume, and mixed to obtain the slurry of the target density, including: Injecting a first reference volume of raw pulp into the pulp storage barrel; the first reference volume is smaller than the fourth volume; detecting the density of the mixed slurry to obtain a first detected density; A first reference density is calculated according to the first reference volume, the initial volume and the initial density; the first reference density represents the density value that the slurry should be at theoretically after the first reference volume of the original slurry is injected; If the first detection density is equal to the first reference density, calculating a first difference between the fourth volume and the first reference volume; The raw slurry having a volume equal to the first difference is injected into the slurry storage barrel, and the slurry having the target density is obtained by mixing.
[0009] The technical solution provided by the present invention also includes: If the first detected density is not equal to the first reference density, re-detecting the density of the raw pulp to obtain a first raw pulp density; According to the first raw pulp density, the initial volume, the first reference volume, the first detection density, the total capacity and the target density, the first compensation volume and the second compensation volume are calculated; the first compensation volume is the minimum volume of water required to be added for the slurry to reach the target density after the first reference volume of raw pulp is injected; the second volume is the minimum volume of raw pulp required to be added for the slurry to reach the target density after the first reference volume of raw pulp is injected; Injecting a first compensation volume of water and a second compensation volume of raw pulp into the pulp storage barrel; Mix to obtain a slurry of the target density.
[0010] According to the technical solution provided by the present invention, if the initial volume is greater than or equal to half of the total capacity, the first reference volume is set to be equal to half of the fourth volume; If the initial volume is less than half of the total capacity, the first reference volume is set equal to half of the initial volume.
[0011] According to the technical solution provided by the present invention, the method further includes: If the total volume is greater than the total capacity, and the initial density is greater than the target density, then Calculating, according to the standard raw pulp density, the initial density and the target density, a fifth volume of slurry that needs to be discharged from the slurry storage barrel when the volume of the slurry with the target density is equal to the total capacity, and a sixth volume of water that needs to be added to the slurry storage barrel; The fifth volume of slurry in the slurry storage barrel is discharged, and water is injected into the slurry storage barrel according to the sixth volume to mix to obtain slurry of the target density.
[0012] According to the technical solution provided by the present invention, water is injected into the slurry storage barrel according to the sixth volume, and the slurry having the target density is obtained by mixing, including: Injecting a second reference volume of water into the slurry storage barrel; the second reference volume is smaller than the sixth volume; detecting the density of the mixed slurry to obtain a second detected density; A second reference density is calculated according to the second reference volume, the initial volume and the initial density; the second reference density represents the density value that the slurry should be at theoretically after the second reference volume of water is injected; If the second detection density is equal to the second reference density, calculating a second difference between the sixth volume and the second reference volume; Water having a volume equal to the second difference is injected into the slurry storage barrel, and the slurry having the target density is obtained by mixing.
[0013] The technical solution provided by the present invention also includes: If the second detected density is not equal to the second reference density, re-detecting the density of the raw pulp to obtain a second raw pulp density; According to the second raw pulp density, the initial volume, the second reference volume, the second detection density, the total capacity and the target density, the third compensation volume and the fourth compensation volume are calculated; the third compensation volume is the minimum volume of water that needs to be added to the slurry to reach the target density after the second reference volume of water is injected; the second volume is the minimum volume of raw pulp that needs to be added to the slurry to reach the target density after the second reference volume of water is injected; Injecting a third compensation volume of water and a fourth compensation volume of raw pulp into the pulp storage barrel; Mix to obtain a slurry of the target density.
[0014] According to the technical solution provided by the present invention, if the initial volume is greater than or equal to half of the total capacity, the second reference volume is set to be equal to half of the sixth volume; If the initial volume is less than half of the total capacity, the second reference volume is set equal to half of the initial volume.
[0015] The beneficial effects of the present invention are: First, according to the initial volume and initial density of the slurry in the current slurry storage barrel, as well as the target density that the slurry needs to reach, calculate the minimum volume of water that needs to be added and the minimum volume of the original slurry that needs to be added. Then determine whether the total volume after filling is greater than the total capacity of the slurry storage barrel. When it is less than or equal to the total capacity, complete the filling. After subsequent stirring, the slurry of the target density is obtained. This method does not require the discharge of all the original slurry, reducing the loss of the remaining slurry. Utilize the original remaining slurry, add the corresponding water and original slurry to complete the proportion, so that the mixed slurry reaches the required density. Compared with the method of refilling and remixing, the time required for filling is saved. At the same time, since the original slurry has been fully mixed, the mixing time after filling is significantly less than that of remixing. The present invention improves the preparation efficiency of the slurry by shortening the filling time and mixing time; when the demand for slurry is large, it can also meet the preparation needs of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 is a schematic diagram of a slurry stirring device; Figure 2 It is a schematic diagram of a flow chart of a method for automatic control of slurry density; Among them: 1. Slurry storage barrel; 2. Raw slurry branch; 3. Water injection branch; 4. Slurry discharge branch; 5. Stirring device. DETAILED DESCRIPTION
[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.
[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0019] Please refer to Figure 1 The slurry stirring device comprises a slurry storage barrel 1, on which a stirring device 5 is installed, and on the side walls of which a raw slurry branch 2, a water injection branch 3 and a slurry discharge branch 4 are respectively installed.
[0020] Among them, the raw pulp branch 2 is used to inject the required volume of raw pulp into the pulp storage barrel 1; the water injection branch 3 is used to inject the required volume of water into the pulp storage barrel 1; the stirring device 5 fully stirs the water and the raw pulp to form a slurry; and finally it is output through the pulp discharge branch 4.
[0021] A liquid level meter is installed in the slurry storage barrel 1 and is electrically connected to the controller. The liquid level meter has high liquid level, middle liquid level and low liquid level. When the liquid level is high, the internal slurry volume is equal to the total capacity, and the controller automatically controls the original slurry branch 2 and the water injection branch 3 to stop filling. When the liquid level is low, the controller closes the slurry discharge branch 4, opens the original slurry branch 2 and the water injection branch 3, and fills the slurry storage barrel 1. When the liquid level is medium, the controller opens the slurry discharge branch 4.
[0022] Herein, the raw pulp is a pulp with high concentration and high density. Since the concentration of the pulp is positively correlated with the density of the pulp, the present invention reflects the concentration of the pulp by calculating the density of the pulp.
[0023] The present invention provides a method for automatically controlling slurry density, the core concept of which is: First, according to the initial volume and initial density of the slurry in the current slurry storage tank, the total capacity of the slurry storage tank, the standard original slurry density, and the target density that the slurry needs to reach, the minimum volume of water and the minimum volume of original slurry that needs to be added are calculated. After subsequent stirring, the slurry with the target density is obtained.
[0024] This method does not need to discharge all the original slurry, reducing the loss of the remaining slurry. The original remaining slurry is used to add the corresponding water and the original slurry to complete the proportion, so that the mixed slurry reaches the required density.
[0025] Compared with the method of completely draining out the remaining slurry and then refilling and mixing, the time required for filling is shortened. At the same time, since the remaining slurry has been fully mixed, the mixing time after filling is significantly less than remixing.
[0026] The present invention improves the slurry preparation efficiency by shortening the filling time and the mixing time; when the slurry demand is large, the slurry preparation demand can also be met.
[0027] refer to Figure 2 , methods include: Obtaining the initial volume and initial density of the current slurry in the slurry storage barrel 1, the total capacity of the slurry storage barrel 1, the standard original slurry density, and the target density that the slurry needs to reach; Calculate the first volume and the second volume according to the initial volume, initial density, standard original slurry density and target density; the first volume is the minimum volume of water that needs to be added for the slurry to reach the target density; the second volume is the minimum volume of original slurry that needs to be added for the slurry to reach the target density; Calculating the sum of the first volume, the second volume and the initial volume to obtain a total volume; If the total volume is less than or equal to the total capacity, the first volume of water and the second volume of raw pulp are added into the pulp storage barrel 1 .
[0028] Specifically, in actual situations, if the initial density is equal to the target density, the original ratio of water to slurry is continued to be injected to complete the stirring and mixing.
[0029] Therefore, when applying the above-mentioned method of the present invention, the default initial density is not equal to the target density. Therefore, there are two cases: (I) The first case is: initial density Less than target density ; At this time, it is only necessary to inject a corresponding volume of raw slurry into the slurry storage barrel 1 to increase the overall density of the slurry; and the first volume of water injected is 0.
[0030] The specific calculation process of the first volume and the second volume is prior art, and only the calculation formula is given in this embodiment.
[0031] According to the standard raw pulp density, initial volume, initial density and target density, the process of calculating the first volume and the second volume can be expressed by Formula 1: Formula 1; In this embodiment, x represents the first volume, y represents the second volume, represents the initial density, Indicates the standard raw pulp density, represents the target density, Indicates the initial volume. In this embodiment, the density of water is 1 by default.
[0032] In this embodiment, the slurry storage barrel 1 is cylindrical in shape and has an initial volume of The initial density can be calculated from the liquid level measured by the liquid level meter and the radius of the pulp storage barrel 1. It can be measured by density tester, standard raw pulp density , target density are all known; thus, the first volume can be obtained according to formula 1 x With the second volume y The conversion relationship between them.
[0033] According to the solution of the present invention, the first volume x The minimum volume of water required to achieve the target density of the slurry, the second volume yThe minimum volume of raw slurry that needs to be added to achieve the target density of the slurry. In this embodiment, only raw slurry needs to be injected, and the first volume of water injected is 0. x Substitute 0 into the calculation and finally get the second volume y The specific value of .
[0034] Generally, after the second volume is calculated, the second volume of the original slurry can be directly injected into the slurry storage barrel 1, and the stirring device 5 is used to complete the stirring so that the density of the slurry reaches the target density.
[0035] However, in some cases, for example, when there is more slurry remaining in the slurry storage barrel 1, the specific value of the calculated second volume will be larger. Although the first volume is 0, the sum of the first volume, the second volume and the initial volume will be greater than the total capacity. This results in that if the second volume of raw slurry is directly injected into the slurry storage barrel 1, the slurry storage barrel 1 will be difficult to accommodate.
[0036] Therefore, the above solution will only inject the second volume of raw pulp into the pulp storage barrel 1 when the sum of the first volume, the second volume and the initial volume, that is, the total volume is less than the total capacity.
[0037] In view of the situation that the total volume is greater than the total capacity, the present invention also designs the following solutions: Further, if the total volume is greater than the total capacity, and the initial density is less than the target density, then the third volume of slurry that needs to be discharged from the slurry storage barrel 1 when the volume of slurry with the target density is equal to the total capacity, and the fourth volume of raw slurry that needs to be added to the slurry storage barrel 1 are calculated according to the standard raw slurry density, the initial density and the target density; Among them, when the condition that the total volume is greater than the total capacity and the initial density is less than the target density is satisfied, the first volume is equal to zero, and then the third volume and the fourth volume can be calculated.
[0038] The third volume of slurry in the slurry storage barrel 1 is discharged, and raw slurry is injected into the slurry storage barrel 1 according to the fourth volume, and the slurry with the target density is obtained by mixing.
[0039] This step can be understood as: when the total volume is greater than the total capacity, part of the slurry is discharged so that after the original slurry is injected, the volume of the slurry is equal to the total capacity and the density is equal to the target density.
[0040] The volume of the discharged slurry is assumed to be the third volume; and the first remaining volume of the slurry after discharge is equal to the difference between the initial volume and the third volume; Then substitute the first residual volume into the formula Calculate, at this time the first volume is equal to 0, yDenote the fourth volume, and a first relational expression between the first residual volume and the fourth volume can be obtained; In this embodiment, the slurry storage barrel 1 is filled up by default, so there is also a second relationship: the sum of the first remaining volume and the fourth volume is equal to the total capacity.
[0041] Finally, the first relational expression and the second relational expression are combined, wherein there are two unknown parameters, namely the first remaining volume and the fourth volume, and the specific values of the first remaining volume and the fourth volume can be calculated; and the third volume of the current slurry that needs to be discharged can be calculated.
[0042] Subsequently, the third volume of slurry in the slurry storage barrel 1 is discharged; the fourth volume of raw slurry is injected into the slurry storage barrel 1, and the slurry with the target density is obtained by mixing.
[0043] Therefore, even if the total volume is greater than the total capacity according to the calculation, the slurry having a volume equal to the total capacity and a target density can be obtained through the steps in this embodiment. Although part of the original slurry is discharged in this embodiment, it still saves the consumption of slurry compared with the method of discharging all slurry, and can still reduce the filling time and the time required for uniform mixing.
[0044] In the actual working process, since the supply of the raw pulp is not continuous, but is prepared in advance and stored in the storage tank, due to the influence of various factors, such as preparation conditions, storage environment, etc., the actual density of the raw pulp in different storage tanks may be different from the standard raw pulp density. This will cause the density of the final mixed slurry to be different from the target density. In order to eliminate the influence of the factor that the actual density of the raw pulp is not equal to the standard raw pulp density on the density of the mixed slurry, the present invention also designs the following steps: Further, injecting raw slurry into the slurry storage barrel 1 according to the fourth volume and mixing to obtain slurry of the target density comprises: Injecting a first reference volume of raw pulp into the pulp storage barrel 1; the first reference volume is smaller than the fourth volume; detecting the density of the mixed slurry to obtain a first detected density; A first reference density is calculated according to the first reference volume, the initial volume and the initial density; the first reference density represents the density value that the slurry should be at theoretically after the first reference volume of the original slurry is injected; If the first detection density is equal to the first reference density, calculating a first difference between the fourth volume and the first reference volume; The raw slurry having a volume equal to the first difference is injected into the slurry storage barrel 1, and the slurry having the target density is obtained by mixing.
[0045] If the density of the original pulp is a constant, the density of the mixed pulp is linearly related to the volume of the injected water or original pulp. Since the fourth volume is equal to the first reference volume plus the first difference, the density of the obtained pulp is equal to the target density after the first reference volume of the original pulp is injected first and then the original pulp of the first difference is injected.
[0046] Furthermore, it also includes: If the first detected density is not equal to the first reference density, re-detecting the density of the raw pulp to obtain a first raw pulp density; According to the first raw pulp density, the initial volume, the first reference volume, the first detection density, the total capacity and the target density, the first compensation volume and the second compensation volume are calculated; the first compensation volume is the minimum volume of water required to be added for the slurry to reach the target density after the first reference volume of raw pulp is injected; the second volume is the minimum volume of raw pulp required to be added for the slurry to reach the target density after the first reference volume of raw pulp is injected; Injecting a first compensation volume of water and a second compensation volume of raw pulp into the pulp storage barrel 1; Mix to obtain a slurry of the target density.
[0047] The above steps can be understood as: During the filling process, a partial volume of the original slurry is first filled, stirred, and then tested to obtain a first test density; Calculate the density value that the slurry should be at theoretically after the current volume of raw slurry is added, i.e. the first reference density; If the first detected density is equal to the first reference density, it means that the density of the current raw pulp is equal to the standard raw pulp density, and the filling can continue in the current manner.
[0048] If they are not equal, it means that the density of the current stock is not equal to the standard stock density. It is necessary to recalculate the density of the current stock and recalculate the filling volume of the stock, or replace the stock with the standard stock density and then recalculate the filling volume. The specific calculation method of the filling volume is the same as the principle of the method using formula 1 in the previous article, only the data is different, so it will not be repeated here.
[0049] Based on the above steps, if the actual density of the raw slurry is not equal to the standard raw slurry density during the filling process, the solution of the present invention can also detect it in time and have corresponding compensation measures to ensure that the final slurry density is equal to the target density.
[0050] When it is found that the density of the current raw pulp is not equal to the standard raw pulp density, the solution of this embodiment does not need to stop the filling process and then replace the raw pulp with the standard raw pulp density, thereby saving the time consumed in replacing the raw pulp supply. When the slurry demand is large, it is also beneficial to improve the preparation efficiency.
[0051] Specifically, when the initial volume is greater than or equal to half of the total capacity, the first reference volume is set to half of the fourth volume; When the initial volume is less than half of the total capacity, the first reference volume is set to half of the initial volume.
[0052] This arrangement, when the initial volume is greater than or equal to half of the total capacity, can ensure that when the first detected density is not equal to the first reference density, there is sufficient remaining space in the slurry storage barrel 1 so that sufficient water or raw slurry can be subsequently added to compensate for the density of the slurry.
[0053] In the case where the initial volume is less than half of the total capacity, when the first detected density is not equal to the first reference density, the slurry is less affected by the original slurry with inaccurate density, so that a large difference will not occur between the slurry density and the target density.
[0054] (ii) The second situation is: the initial density is greater than the target density; At this time, it is only necessary to inject a corresponding volume of water into the slurry storage barrel 1 to reduce the overall density of the slurry; and the second volume of the raw slurry injected is 0.
[0055] According to the initial volume, initial density, total capacity and target density, the process of calculating the first volume and the second volume is also expressed by Formula 1, and the principle is the same as that of the first case.
[0056] For the case where the total volume is greater than the total capacity, the following solutions are also available: Furthermore, the method further comprises: If the total volume is greater than the total capacity, and the initial density is greater than the target density, then Calculating, according to the standard raw slurry density, the initial density and the target density, a fifth volume of slurry that needs to be discharged from the slurry storage barrel 1 when the volume of the slurry with the target density is equal to the total capacity, and a sixth volume of water that needs to be added to the slurry storage barrel 1; The fifth volume of slurry in the slurry storage barrel 1 is discharged, and water is injected into the slurry storage barrel 1 according to the sixth volume, and the slurry having the target density is obtained by mixing.
[0057] The principle is the same as in the first case. When the total volume is greater than the total capacity, the steps in this embodiment can also be used to obtain a slurry with a volume equal to the total capacity and a target density. Compared with the method of discharging all slurries, this embodiment saves the consumption of slurry, reduces the filling time, and reduces the time required for uniform mixing.
[0058] In order to eliminate the influence of inaccurate original pulp density on slurry density, the following steps are also required: Further, water is injected into the slurry storage barrel 1 according to the sixth volume, and the slurry having the target density is obtained by mixing, including: Injecting a second reference volume of water into the slurry storage barrel 1; the second reference volume is smaller than the sixth volume; detecting the density of the mixed slurry to obtain a second detected density; A second reference density is calculated according to the second reference volume, the initial volume and the initial density; the second reference density represents the density value that the slurry should be at theoretically after the second reference volume of water is injected; If the second detection density is equal to the second reference density, calculating a second difference between the sixth volume and the second reference volume; Water having a volume equal to the second difference is injected into the slurry storage barrel 1, and the slurry having the target density is obtained by mixing.
[0059] Furthermore, it also includes: If the second detected density is not equal to the second reference density, re-detecting the density of the raw pulp to obtain a second raw pulp density; According to the second raw pulp density, initial volume, second reference volume, second detection density, total capacity and target density, calculate the third compensation volume and the fourth compensation volume; the third compensation volume is the minimum volume of water required to be added for the slurry to reach the target density after the second reference volume of water is injected; the second volume is the minimum volume of raw pulp required to be added for the slurry to reach the target density after the second reference volume of water is injected; the principle is the same as the first case; Injecting a third compensation volume of water and a fourth compensation volume of raw pulp into the pulp storage barrel 1; Mix to obtain a slurry of the target density.
[0060] Based on the above steps, if the actual density of the raw slurry is not equal to the standard raw slurry density during the filling process, the solution of the present invention can also detect it in time and have corresponding compensation measures to ensure that the final slurry density is equal to the target density.
[0061] Specifically, when the initial volume is greater than or equal to half of the total capacity, the second reference volume is set to half of the sixth volume; When the initial volume is less than half of the total capacity, the second reference volume is set to half of the initial volume.
[0062] This arrangement, when the initial volume is greater than or equal to half of the total capacity, can ensure that when the first detected density is not equal to the first reference density, there is sufficient remaining space in the slurry storage barrel 1 so that sufficient water or raw slurry can be subsequently added to compensate for the density of the slurry.
[0063] In the case where the initial volume is less than half of the total capacity, when the first detected density is not equal to the first reference density, the slurry is less affected by the original slurry with inaccurate density, so that a large difference will not occur between the slurry density and the target density.
[0064] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.
Claims
1. A method for automatically controlling slurry density, characterized in that: include: Obtaining the initial volume and initial density of the slurry currently in the slurry storage barrel (1), the total capacity of the slurry storage barrel (1), the standard raw slurry density, and the target density that the slurry needs to reach; Calculate the first volume and the second volume according to the initial volume, initial density, standard original slurry density and target density; the first volume is the minimum volume of water that needs to be added for the slurry to reach the target density; the second volume is the minimum volume of original slurry that needs to be added for the slurry to reach the target density; Calculating the sum of the first volume, the second volume and the initial volume to obtain a total volume; If the total volume is less than or equal to the total capacity, the first volume of water and the second volume of raw pulp are added to the pulp storage barrel (1).
2. The method for automatic control of slurry density according to claim 1, characterized in that: The method further comprises: If the total volume is greater than the total capacity, and the initial density is less than the target density, then, based on the standard raw pulp density, the initial density and the target density, a third volume of the pulp that needs to be discharged from the pulp storage barrel (1) when the volume of the pulp having the target density is equal to the total capacity, and a fourth volume of the raw pulp that needs to be added to the pulp storage barrel (1) are calculated; The third volume of slurry in the slurry storage barrel (1) is discharged, and raw slurry according to the fourth volume is injected into the slurry storage barrel (1), and the slurry having the target density is obtained by mixing.
3. The method for automatic control of slurry density according to claim 2, characterized in that: Injecting raw slurry into the slurry storage barrel (1) according to the fourth volume, and mixing to obtain slurry with the target density, comprising: Injecting a first reference volume of raw pulp into the pulp storage barrel (1); the first reference volume is smaller than the fourth volume; Detecting the density of the mixed slurry to obtain a first detection density; Calculating a first reference density according to the first reference volume, the initial volume and the initial density; if the first detection density is equal to the first reference density, calculating a first difference between the fourth volume and the first reference volume; A raw slurry having a volume equal to the first difference is injected into the slurry storage barrel (1), and mixed to obtain a slurry having the target density.
4. The method for automatically controlling slurry density according to claim 3, characterized in that: Also includes: If the first detected density is not equal to the first reference density, re-detecting the density of the raw pulp to obtain a first raw pulp density; According to the first raw pulp density, the initial volume, the first reference volume, the first detection density, the total capacity and the target density, the first compensation volume and the second compensation volume are calculated; the first compensation volume is the minimum volume of water required to be added for the slurry to reach the target density after the first reference volume of raw pulp is injected; the second volume is the minimum volume of raw pulp required to be added for the slurry to reach the target density after the first reference volume of raw pulp is injected; Injecting a first compensation volume of water and a second compensation volume of raw pulp into the pulp storage barrel (1); Mix to obtain a slurry of the target density.
5. The method for automatic control of slurry density according to claim 3, characterized in that: If the initial volume is greater than or equal to half of the total capacity, the first reference volume is set equal to half of the fourth volume; If the initial volume is less than half of the total capacity, the first reference volume is set equal to half of the initial volume.
6. The method for automatic control of slurry density according to claim 1, characterized in that: The method further comprises: If the total volume is greater than the total capacity, and the initial density is greater than the target density, then Calculating, based on the standard raw pulp density, the initial density and the target density, a fifth volume of slurry that needs to be discharged from the slurry storage barrel (1) when the volume of slurry having the target density is equal to the total capacity, and a sixth volume of water that needs to be added to the slurry storage barrel (1); The fifth volume of slurry in the slurry storage barrel (1) is discharged, and water is injected into the slurry storage barrel (1) according to the sixth volume, and mixed to obtain slurry of the target density.
7. The method for automatically controlling slurry density according to claim 6, characterized in that: Injecting water into the slurry storage barrel (1) according to the sixth volume and mixing to obtain slurry with the target density comprises: Injecting a second reference volume of water into the slurry storage barrel (1); the second reference volume is smaller than the sixth volume; detecting the density of the mixed slurry to obtain a second detected density; A second reference density is calculated according to the second reference volume, the initial volume and the initial density; the second reference density represents the density value that the slurry should be at theoretically after the second reference volume of water is injected; If the second detection density is equal to the second reference density, calculating a second difference between the sixth volume and the second reference volume; Water having a volume equal to the second difference is injected into the slurry storage barrel (1), and mixed to obtain slurry having the target density.
8. The method for automatically controlling slurry density according to claim 7, characterized in that: Also includes: If the second detected density is not equal to the second reference density, re-detecting the density of the raw pulp to obtain a second raw pulp density; According to the second raw pulp density, the initial volume, the second reference volume, the second detection density, the total capacity and the target density, the third compensation volume and the fourth compensation volume are calculated; the third compensation volume is the minimum volume of water that needs to be added to the slurry to reach the target density after the second reference volume of water is injected; the second volume is the minimum volume of raw pulp that needs to be added to the slurry to reach the target density after the second reference volume of water is injected; Injecting a third compensation volume of water and a fourth compensation volume of raw pulp into the pulp storage barrel (1); Mix to obtain a slurry of the target density.
9. The method for automatically controlling slurry density according to claim 7, characterized in that: If the initial volume is greater than or equal to half of the total capacity, the second reference volume is set equal to half of the sixth volume; If the initial volume is less than half of the total capacity, the second reference volume is set equal to half of the initial volume.