Multi-state, multi-path and coupling linkage acid liquor mixing control system and method

Abstract

The invention discloses a multi-state, multi-path and coupling linkage acid liquor mixing control system and method, the system comprises a mixing tank, a buffer tank and a control system, the mixing tank is communicated with the buffer tank through a mixed transportation pipeline; the top of the mixing tank is communicated with an acid liquor pipeline and an additive pipeline group, and the acid liquor pipeline is communicated with a fourth additive pipeline; the top of the buffer tank is communicated with a clear water pipeline and a fifth additive pipeline, the bottom of the buffer tank is communicated with a discharge pipeline, and the discharge pipeline is communicated with a sixth additive pipeline; flowmeters and pumps are arranged in all the pipelines, and the control system is electrically connected with all the flowmeters and all the pumps. According to the device, online proportional mixing of solid powder particles, additives and acid liquor is achieved, particularly when liquid flow is unstable, the adding amount of the solid powder and the adding amount of other additives can change along with the flow change of the acid, the mixing proportion of the solid powder, the mixing proportion of other additives and the acid are kept the same all the time, and large-scale online preparation of the fracturing acid liquor is achieved.

Description

Technical Field

[0001] This invention relates to the field of acid mixing technology in fracturing operations, specifically a multi-mode, multi-path, coupled and linked acid mixing control system and method. Background Technology

[0002] Currently, the oilfield employs a manual batch mixing process for acid, water, and chemical additives. This process involves the addition of hydrochloric acid, water, at least three liquid additives, and two powder additives, meaning each operation involves at least seven media, including acid, water, various liquid additives, and powder additives. This multi-mode, multi-path mixing requires strict adherence to the order of additive addition, and each medium must be added according to specified ratios. Operators manually calculate and record the concentrations and dosages of acid, water, and various additives, controlling acid quality by ensuring the total amount of each medium added. However, this method cannot meet the requirement of real-time adjustments to additive dosages based on changes in base fluid discharge, easily leading to uneven acid mixing. During acid preparation, fluctuations in acid discharge are inevitable. If the additives do not adjust accordingly to the designed ratios, acid quality will be affected. Furthermore, the acid used in the operation is highly corrosive, posing significant safety hazards due to the manual mixing method. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, the purpose of this invention is to provide a multi-mode, multi-path, coupled, and interconnected acid mixing control system. In acid mixing operations, the control system uses the original acid as a baseline. After inputting the proportions of various additives into the control system, it can adjust the amount of various media added online in real time according to the input proportions, supporting multiple types and forms to meet the mixing requirements and produce a uniform and high-quality finished acid solution. Simultaneously, it reduces labor intensity and preserves operational data for easy later traceability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-mode, multi-path, coupled and linked acid mixing control system includes a mixing tank, a buffer tank, and a control system. The mixing tank and the buffer tank are connected via a mixing pipeline. The top of the mixing tank is connected to an acid pipeline and an additive pipeline group, and the acid pipeline is connected to a fourth additive pipeline. The top of the buffer tank is connected to a clean water pipeline and a fifth additive pipeline, and the bottom of the buffer tank is connected to a discharge pipeline, which is connected to a sixth additive pipeline. Flow meters and pumps are installed in all pipelines, and the control system is electrically connected to all flow meters and all pumps.

[0006] Furthermore, the acid pipeline is sequentially equipped with an acid valve, an acid pump, an acid flow meter, and a first powder assembly, with the acid valve located at the end of the acid pipeline furthest from the mixing tank;

[0007] Specifically, the first powder assembly includes a first powder conveying system, a first powder weighing system, and a first powder dispensing valve connected in sequence, and the first powder dispensing valve is connected to the acid pipeline;

[0008] Specifically, the acid pipeline is connected to the fourth additive pipeline between the acid pump and the acid valve. The fourth additive pipeline is sequentially equipped with a fourth liquid addition valve, a fourth liquid addition flow meter, and a fourth liquid addition pump. The fourth liquid addition valve is located at one end of the fourth additive pipeline near the acid pipeline.

[0009] Furthermore, the additive pipeline assembly includes a first liquid additive pipeline, a second liquid additive pipeline, and a third liquid additive pipeline connected in parallel.

[0010] Specifically, a first liquid filling valve, a first liquid filling flow meter, and a first liquid filling pump are sequentially installed on the first liquid filling pipeline, and the first liquid filling valve is located at the end of the first liquid filling pipeline near the mixing tank.

[0011] Specifically, a second liquid filling valve, a second liquid filling flow meter, and a second liquid filling pump are sequentially installed on the second liquid filling pipeline, with the second liquid filling valve located at the end of the second liquid filling pipeline closer to the mixing tank;

[0012] Specifically, a third liquid addition valve, a third liquid addition flow meter, and a third liquid addition pump are sequentially installed on the third liquid addition pipeline, with the third liquid addition valve located at the end of the third liquid addition pipeline near the mixing tank.

[0013] Furthermore, the mixing pipeline is connected to the bottom of the mixing tank and to the top of the buffer tank; the mixing pipeline includes a mixing valve, a mixing pump, a mixing liquid flow meter, and a second powder assembly arranged in sequence, and the mixing valve is close to the mixing tank;

[0014] Specifically, the second powder assembly includes a second powder conveying system, a second powder weighing system, and a second powder dispensing valve connected in sequence, the second powder dispensing valve being connected to a mixing pipeline;

[0015] Specifically, the clean water pipeline is connected to the mixed transport pipeline, and the clean water pipeline is located between the second powder conveying system and the buffer tank;

[0016] Specifically, a clean water valve, a clean water flow meter, and a clean water pump are sequentially installed on the clean water pipeline, with the clean water valve located at the end of the clean water pipeline near the buffer tank.

[0017] Furthermore, a fifth liquid addition valve, a fifth liquid addition flow meter, and a fifth liquid addition pump are sequentially installed on the fifth liquid addition pipeline, with the fifth liquid addition valve located at the end of the fifth liquid addition pipeline near the mixing tank.

[0018] Furthermore, a discharge valve, a discharge pump, and a discharge flow meter are sequentially installed on the discharge pipeline, with the discharge valve located at the end of the discharge pipeline near the buffer tank;

[0019] Specifically, the discharge pipeline is connected to the sixth liquid filling pipeline between the discharge valve and the discharge pump. The sixth liquid filling pipeline is sequentially equipped with a sixth liquid filling valve, a sixth liquid filling flow meter, and a sixth liquid filling pump. The sixth liquid filling valve is located at the end of the sixth liquid filling pipeline near the discharge pipeline.

[0020] Furthermore, the mixing tank is equipped with a stirrer and a first level gauge, and the mixing tank is used to accelerate the dissolution of poorly soluble powders;

[0021] Specifically, the buffer tank is equipped with a second level gauge, and the buffer tank is used to mix easily soluble powders and further adjust the solution.

[0022] Furthermore, the control system is electrically connected to all valves, all pumps, all flow meters, all powder weighing systems, all level gauges, and agitators.

[0023] Secondly, the present invention provides a method for using a multi-state, multi-path, coupled linkage acid mixing control system. Using the multi-state, multi-path, coupled linkage acid mixing control system described in this aspect includes the following steps:

[0024] Input the proportions of various acids, additives, and powders into the control system;

[0025] The control system automatically compares the flow signals from all flow meters and the amount of powder conveyed with the set proportions of various media.

[0026] If there is a deviation from the set value, the working speed of the acid pump, mixing pump, water pump, discharge pump, all liquid addition pumps, first powder conveying system and second powder conveying system will be automatically adjusted to complete the precise addition of various media and meet the real-time accuracy of the mixing ratio.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. This invention enables online proportional mixing of solid powder, additives, and acid. Especially when the liquid flow is unstable, the amount of solid powder and other additives added can vary with the acid flow rate, always maintaining the same mixing ratio of solid powder, other additives, and acid. This enables large-scale online preparation of fracturing acid, ensuring the uniformity of powder and liquid phases in the prepared acid, and achieving the required density and viscosity.

[0029] 2. This invention enables real-time online precise addition of hydrochloric acid, water, at least three liquid additives, and two powder additives. The control system precisely controls the amount of hydrochloric acid pump, water pump, discharge pump, various liquid additive pumps, and powder additives added, ensuring the uniformity of the acid mixing process and guaranteeing the quality of the acid mixing. The acid mixing process is automatically controlled by the control system, which can record real-time operation data without operator intervention, eliminating safety hazards and reducing labor intensity. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a multi-state, multi-path, coupled linkage acid mixing control system of the present invention.

[0031] In the diagram: 1. Mixing tank; 1.1. Agitator; 1.2. First level gauge; 2. Buffer tank; 2.1. Second level gauge; 3. First powder conveying system; 4. First powder weighing system; 5. First powder dispensing valve; 6. Second powder conveying system; 7. Second powder weighing system; 8. Second powder dispensing valve;

[0032] B1. Acid pump; B2. Mixing pump; B3. Clean water pump; B4. Discharge pump;

[0033] F1, Acid valve; F2, Mixing valve; F3, Clean water valve; F4, Discharge valve;

[0034] L1, Acid flow meter; L2, Mixed liquid flow meter; L3, Clear water flow meter; L4, Discharge flow meter;

[0035] P1, Acid pressure gauge; P2, Mixed liquid pressure gauge; P3, Clear water pressure gauge; P4, Discharge pressure gauge;

[0036] YF1, First liquid filling valve; YF2, Second liquid filling valve; YF3, Third liquid filling valve; YF4, Fourth liquid filling valve; YF5, Fifth liquid filling valve; YF6, Sixth liquid filling valve;

[0037] YB1, First liquid filling pump; YB2, Second liquid filling pump; YB3, Third liquid filling pump; YB4, Fourth liquid filling pump; YB5, Fifth liquid filling pump; YB6, Sixth liquid filling pump;

[0038] YL1, First liquid addition flow meter; YL2, Second liquid addition flow meter; YL3, Third liquid addition flow meter; YL4, Fourth liquid addition flow meter; YL5, Fifth liquid addition flow meter; YL6, Sixth liquid addition flow meter. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] Please see Figure 1 This invention provides a multi-state, multi-path, coupled and linked acid mixing control system, including a mixing tank 1, a buffer tank 2, and a control system. The mixing tank 1 and the buffer tank 2 are connected by a mixing pipeline. The mixing pipeline is connected to the bottom of the mixing tank 1 and the top of the buffer tank 2. The top of the mixing tank 1 is connected to an acid pipeline and an additive pipeline group. The acid pipeline is connected to a fourth additive pipeline. The top of the buffer tank 2 is connected to a clean water pipeline and a fifth additive pipeline. The bottom of the buffer tank 2 is connected to a discharge pipeline, which is connected to a sixth additive pipeline.

[0042] The mixing tank 1 is equipped with a stirrer 1.1 and a first level gauge 1.2. The mixing tank 1 is used to accelerate the dissolution of insoluble powders.

[0043] The buffer tank 2 is equipped with a second level gauge 2.1. The buffer tank 2 is used to mix easily soluble powders and further adjust the solution.

[0044] The acid pipeline is sequentially equipped with an acid valve F1, an acid pump B1, an acid flow meter L1, and a first powder assembly. The acid valve F1 is located at the end of the acid pipeline away from the mixing tank 1. The first powder assembly includes a first powder conveying system 3, a first powder weighing system 4, and a first powder dispensing valve 5 connected in sequence. The first powder dispensing valve 5 is connected to the acid pipeline and is used to dispense insoluble corrosion inhibitor powder. An acid pressure gauge P1 is installed between the first powder assembly and the acid pump B1 to detect the pressure of the acid pipeline. The acid pipeline is connected to a fourth additive pipeline between the acid pump B1 and the acid valve F1. The fourth additive pipeline is sequentially equipped with a fourth liquid addition valve YF4, a fourth liquid addition flow meter YF4, and a fourth liquid addition pump YB4. The fourth liquid addition valve YF4 is located at the end of the fourth additive pipeline closer to the acid pipeline and is used to dispense corrosion inhibitor.

[0045] The additive pipeline group includes a first liquid addition pipeline, a second liquid addition pipeline, and a third liquid addition pipeline connected in parallel. The first liquid addition pipeline is sequentially equipped with a first liquid addition valve YF1, a first liquid addition flow meter YF1, and a first liquid addition pump YB1. The first liquid addition valve YF1 is located at the end of the first liquid addition pipeline near the mixing tank 1.

[0046] The second liquid filling pipeline is sequentially equipped with a second liquid filling valve YF2, a second liquid filling flow meter YF2, and a second liquid filling pump YB2. The second liquid filling valve YF2 is located at the end of the second liquid filling pipeline near the mixing tank 1.

[0047] The third liquid addition pipeline is sequentially equipped with a third liquid addition valve YF3, a third liquid addition flow meter YF3, and a third liquid addition pump YB3. The third liquid addition valve YF3 is located at the end of the third liquid addition pipeline near the mixing tank 1. The additive pipeline group is used to add corrosion slower, iron ion stabilizer, and clay stabilizer.

[0048] The mixing pipeline includes a mixing valve F2, a mixing pump B2, a mixed liquid flow meter L2, and a second powder assembly arranged in sequence. The mixing valve F2 is located near the mixing tank 2. The second powder assembly includes a second powder conveying system 6, a second powder weighing system 7, and a second powder dispensing valve 8 connected in sequence. The second powder dispensing valve 8 is connected to the mixing pipeline. The second powder assembly is used to dispense easily soluble gelling agent powder. A mixed liquid pressure gauge P2 is installed between the mixing valve F2 and the mixing pump B2 in the mixing pipeline to detect the pressure of the mixing pipeline.

[0049] The clean water pipeline is connected to the mixed transport pipeline. The clean water pipeline is located between the second powder conveying system 6 and the buffer tank 2. A clean water valve F3, a clean water flow meter L3, and a clean water pump B3 are sequentially installed on the clean water pipeline. The clean water valve F3 is located at the end of the clean water pipeline near the buffer tank. A clean water pressure gauge P3 is installed between the buffer tank and the clean water pipeline in the mixed transport pipeline to input the pressure after the clean water is applied.

[0050] The fifth liquid addition pipeline is sequentially equipped with a fifth liquid addition valve YF5, a fifth liquid addition flow meter YF5, and a fifth liquid addition pump YB5. The fifth liquid addition valve YF5 is located at one end of the fifth liquid addition pipeline near the mixing tank 5. The fifth liquid addition pipeline is used to add gelling agent.

[0051] The discharge pipeline is sequentially equipped with a discharge valve F4, a discharge pump B4, and a discharge flow meter L4. The discharge valve F4 is located at the end of the discharge pipeline near the buffer tank 2. A discharge pressure gauge P4 is installed between the discharge pump B4 and the discharge flow meter L4 to monitor the discharge pressure. The discharge pipeline is connected to a sixth liquid addition pipeline between the discharge valve F4 and the discharge pump B4. The sixth liquid addition pipeline is sequentially equipped with a sixth liquid addition valve YF6, a sixth liquid addition flow meter YF6, and a sixth liquid addition pump YB6. The sixth liquid addition valve YF6 is located at the end of the sixth liquid addition pipeline near the discharge pipeline. The sixth liquid addition pipeline is used to add the discharge aid.

[0052] The control system is electrically connected to all valves, pumps, flow meters, pressure gauges, powder weighing systems, level gauges, and agitators (1.1). It can receive or send information for control, and allows for setting operating parameters to control the concentration and composition of the finished acid solution.

[0053] Specifically, all pumps are driven by electric motors or hydraulic motors.

[0054] Specifically, the powder conveying capacity of the powder conveying system can be adjusted, and the powder weighing system uses an electronic scale to weigh the powder and obtains the conveying speed of the powder using the loss-in-weight method.

[0055] Specifically, flow meters are used to measure the real-time and cumulative amount of each liquid medium added.

[0056] The control system collects the flow signals of each flow meter and the amount of powder conveyed, and then automatically adjusts the speeds of the hydrochloric acid pump, water pump, discharge pump, liquid addition pump, and powder conveying system according to the set proportions of various media to ensure that the proportions meet the requirements.

[0057] It should be noted that the powder conveying system, powder weighing system, valves, pumps, and meters used in this invention are existing technologies and can be purchased. The control system used in this invention can be a programmable controller such as a PLC, a microcontroller, or an industrial control computer.

[0058] Example 2:

[0059] This embodiment provides a method for using a multi-state, multi-path, coupled and linked acid mixing control system, including the following steps:

[0060] When performing acid mixing operations, the proportions of various additives are input into the control system in advance;

[0061] The ratio of corrosion inhibitor to original acid in the fourth liquid filling pipeline is 1-2:99-98.

[0062] With the data from acid flow meter L1 as 100%;

[0063] The first powder conveying system 3 adds 0.5%-1% corrosion inhibitor powder;

[0064] Add 0.5%-1% iron ion stabilizer to the first liquid filling pipeline;

[0065] Add 1%-2% corrosion inhibitor to the second liquid filling pipeline;

[0066] The third liquid addition pipeline requires the addition of 0.1%-0.5% clay stabilizer;

[0067] The second powder conveying system 6 adds 0.1%-0.5% of gelling agent powder;

[0068] Add clean water to the clean water pipeline to ensure the acidity meets the standard.

[0069] Add 0.4%-0.9% gelling agent to the fifth liquid filling pipeline;

[0070] Add 0.5%-1% of drainage aid to the sixth liquid filling pipeline;

[0071] The original acid is hydrochloric acid with a concentration of 20%-30%;

[0072] The total amount of powder should not exceed 1%;

[0073] The control system automatically compares the flow signals from all flow meters and the amount of powder conveyed with the set proportions of various media. If there is a deviation from the set value, it automatically adjusts the working speeds of the acid pump B1, mixing pump B2, water pump B3, discharge pump B4, all liquid addition pumps, the first powder conveying system 3, and the second powder conveying system 6 to complete the precise addition of various media, meet the real-time accuracy of the proportions, ensure the uniformity of the acid mixing process and guarantee the quality of the acid mixing, and prepare a high-quality finished acid solution. At the same time, the control system collects and stores real-time data of the operation process for easy review and traceability later.

[0074] Based on the data from the acid flow meter L1, ignoring the influence of powder, control the addition amount of the first powder conveying system 3, the first liquid addition pump YB1, the second liquid addition pump YB2, and the third liquid addition pump YB3;

[0075] By combining the data from the first liquid addition flow meter YL1, the second liquid addition flow meter YL2, and the third liquid addition flow meter YL3, and then combining the data from the mixed liquid flow meter L2, the addition amounts of the second powder conveying system 6, the clean water pump B3, and the fifth liquid addition pump YB5 are controlled.

[0076] The sixth liquid addition pump YB6 is controlled by combining the data from the discharge flow meter L4.

[0077] The system operates automatically, recording real-time operational data without operator intervention, thus eliminating safety hazards and reducing labor intensity. Through its use at the Tongshen 17 well, all parameters have met design specifications.

[0078] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0079] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0081] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-state, multi-path, coupled and linked acid mixing control system, comprising a mixing tank, a buffer tank, and a control system, characterized in that, The mixing tank and the buffer tank are connected by a mixing pipeline; The top of the mixing tank is connected to an acid pipeline and an additive pipeline group, and the acid pipeline is connected to the fourth additive pipeline. The top of the buffer tank is connected to a clean water pipeline and a fifth additive pipeline, and the bottom of the buffer tank is connected to a discharge pipeline, which is connected to a sixth additive pipeline. All pipelines are equipped with flow meters and pumps, and the control system is electrically connected to all flow meters and pumps.

2. The multi-state, multi-path, coupled and linked acid mixing control system according to claim 1, characterized in that, The acid pipeline is sequentially equipped with an acid valve, an acid pump, an acid flow meter, and a first powder assembly. The acid valve is located at the end of the acid pipeline away from the mixing tank. The first powder assembly includes a first powder conveying system, a first powder weighing system, and a first powder dispensing valve connected in sequence, and the first powder dispensing valve is connected to the acid pipeline; The acid pipeline is connected to the fourth additive pipeline between the acid pump and the acid valve. The fourth additive pipeline is equipped with a fourth liquid addition valve, a fourth liquid addition flow meter, and a fourth liquid addition pump in sequence. The fourth liquid addition valve is located at the end of the fourth additive pipeline near the acid pipeline.

3. The multi-state, multi-path, coupled linkage acid mixing control system according to claim 2, characterized in that, The additive pipeline assembly includes a first liquid additive pipeline, a second liquid additive pipeline, and a third liquid additive pipeline connected in parallel. The first liquid filling pipeline is sequentially equipped with a first liquid filling valve, a first liquid filling flow meter, and a first liquid filling pump. The first liquid filling valve is located at the end of the first liquid filling pipeline near the mixing tank. The second liquid filling pipeline is sequentially equipped with a second liquid filling valve, a second liquid filling flow meter, and a second liquid filling pump. The second liquid filling valve is located at the end of the second liquid filling pipeline near the mixing tank. The third liquid addition pipeline is sequentially equipped with a third liquid addition valve, a third liquid addition flow meter, and a third liquid addition pump. The third liquid addition valve is located at the end of the third liquid addition pipeline near the mixing tank.

4. The multi-state, multi-path, coupled linkage acid mixing control system according to claim 3, characterized in that, The mixing pipeline is connected to the bottom of the mixing tank and the top of the buffer tank; the mixing pipeline includes a mixing valve, a mixing pump, a mixed liquid flow meter, and a second powder assembly arranged in sequence, and the mixing valve is close to the mixing tank; The second powder assembly includes a second powder conveying system, a second powder weighing system, and a second powder dispensing valve connected in sequence, the second powder dispensing valve being connected to a mixing pipeline; The clean water pipeline is connected to the mixed transport pipeline, and the clean water pipeline is located between the second powder conveying system and the buffer tank; The clean water pipeline is equipped with a clean water valve, a clean water flow meter, and a clean water pump in sequence. The clean water valve is located at the end of the clean water pipeline near the buffer tank.

5. The multi-state, multi-path, coupled linkage acid mixing control system according to claim 4, characterized in that, The fifth liquid addition pipeline is sequentially equipped with a fifth liquid addition valve, a fifth liquid addition flow meter, and a fifth liquid addition pump. The fifth liquid addition valve is located at the end of the fifth liquid addition pipeline near the mixing tank.

6. The multi-state, multi-path, coupled linkage acid mixing control system according to claim 5, characterized in that, The discharge pipeline is sequentially equipped with a discharge valve, a discharge pump, and a discharge flow meter, with the discharge valve located at the end of the discharge pipeline near the buffer tank. The discharge pipeline is connected to the sixth liquid filling pipeline between the discharge valve and the discharge pump. The sixth liquid filling pipeline is equipped with a sixth liquid filling valve, a sixth liquid filling flow meter, and a sixth liquid filling pump in sequence. The sixth liquid filling valve is located at the end of the sixth liquid filling pipeline near the discharge pipeline.

7. The multi-state, multi-path, coupled and linked acid mixing control system according to claim 6, characterized in that, The mixing tank is equipped with a stirrer and a first level gauge. The mixing tank is used to accelerate the dissolution of insoluble powders. The buffer tank is equipped with a second level gauge. The buffer tank is used to mix easily soluble powders and further adjust the solution.

8. The multi-state, multi-path, coupled linkage acid mixing control system according to claim 7, characterized in that, The control system is electrically connected to all valves, all pumps, all flow meters, all powder weighing systems, all level gauges, and agitators.

9. A method for using a multi-state, multi-path, coupled linkage acid mixing control system, characterized in that, The multi-mode, multi-path, coupled and linked acid mixing control system according to claim 8 includes the following steps: Input the proportions of various acids, additives, and powders into the control system; The control system automatically compares the flow signals from all flow meters and the amount of powder conveyed with the set proportions of various media. If there is a deviation from the set value, the working speed of the acid pump, mixing pump, water pump, discharge pump, all liquid addition pumps, first powder conveying system and second powder conveying system will be automatically adjusted to complete the precise addition of various media and meet the real-time accuracy of the mixing ratio.

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