Solid-liquid raw material mixing preparation system and method in production process

Abstract

The invention relates to the technical field of raw material preparation, and particularly discloses a solid-liquid raw material mixing preparation system and method in the production process, and the system comprises a DCS control system, a solid raw material control device, a liquid raw material control device and a mixing preparation device; the DCS control system is used for determining the current meal feeding amount of the solid raw material control device according to the current liquid level of the mixed preparation device, and determining the current alkali adding flow of the liquid raw material control device according to the current meal feeding amount; the solid raw material control device is controlled to put a target solid raw material into the mixing preparation device according to the current meal feeding amount, and the liquid raw material control device is controlled to put a target liquid raw material into the mixing preparation device according to the current alkali adding flow, so that stirring and mixing preparation are conducted through the mixing preparation device. The solid and liquid raw materials can be uniformly mixed, the continuity of the production process is ensured, the mixing preparation time is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of raw material preparation, and in particular to a system and method for preparing solid-liquid raw material mixtures in a production process. Background Art

[0002] At present, in the production of domestic enterprises, the raw materials are mixed and prepared by sequential control. The proportion of mixed ingredients is related to the quality of the products and the continuity of production.

[0003] Figure 1 This is a production flow chart for mixing solid raw material A and liquid raw material B in traditional production. It specifically describes the process of mixing solid raw material A and liquid raw material B in a ratio of 1:K to prepare wet raw materials. In actual industrial mixing, if the ratio deviation between the raw materials is too large, it will cause production accidents. Take the mixing of solid pulp and caustic soda in the production process of viscose staple fiber as an example: when the proportion of solid pulp is large, it will cause uneven mixing, overload and stop of the mixing motor, low water content of the wet raw material "pulp porridge", and blockage of the pipeline for conveying the pulp porridge, causing the system to stop; when the proportion of liquid caustic soda is large, it will cause the pulp porridge to have a high water content, which will cause a significant burden on the production of the pressing process and even affect the quality of the product.

[0004] Figure 2 Two different processes for mixing solid raw material A with liquid raw material B are described. Figure 2 In Example 1, the two raw materials are weighed accurately, which can well ensure the mixing ratio of the raw materials. However, since raw materials A and B are not mixed in the mixing barrel at the same time, the subsequent mixing process is prone to uneven mixing and the risk of overloading the mixing motor, which poses a risk to production continuity. Figure 2 In Example 2, although the process flow has been greatly improved, ensuring the accuracy of the raw material mixing ratio, shortening the process flow chain, and greatly reducing the process preparation time, there is still a risk of uneven mixing during the mixing and stirring process, and there is still room for shortening the overall process preparation time.

[0005] Therefore, it is urgent to provide a technical solution to solve the above problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a system and method for preparing solid-liquid raw material mixtures in a production process.

[0007] In a first aspect, the present invention provides a system for preparing solid and liquid raw materials by mixing in a production process, and the technical solution of the system is as follows:

[0008] It includes: a DCS control system, a solid raw material control device, a liquid raw material control device and a mixing preparation device; the solid raw material control device and the liquid raw material control device are respectively connected to the mixing preparation device, and the DCS control system is respectively connected to the solid raw material control device, the liquid raw material control device and the mixing preparation device; the DCS control system is used to:

[0009] Determine the current meal feeding amount of the solid raw material control device according to the current liquid level of the mixing and preparing device, and determine the current alkali addition flow rate of the liquid raw material control device according to the current meal feeding amount;

[0010] The solid raw material control device is controlled to feed the target solid raw material to the mixing preparation device according to the current meal feeding amount, and the liquid raw material control device is controlled to feed the target liquid raw material to the mixing preparation device according to the current alkali addition flow rate, so as to perform stirring and mixing preparation through the mixing preparation device.

[0011] The beneficial effects of the solid-liquid raw material mixing preparation system in a production process of the present invention are as follows:

[0012] The system of the present invention can ensure uniform mixing of solid and liquid raw materials, ensure the continuity of the production process, greatly shorten the mixing preparation time, and improve production efficiency.

[0013] On the basis of the above scheme, a system for preparing solid-liquid raw materials by mixing in a production process of the present invention can also be improved as follows.

[0014] In an optional manner, the DCS control system is specifically used for:

[0015] The current meal feeding speed of the solid raw material control device is determined according to the current liquid level of the mixing and preparation device, and the current meal feeding amount of the solid raw material control device is determined according to the expected bath ratio coefficient and the current meal feeding speed.

[0016] In an optional manner, the mixing and preparation device includes: an immersion barrel, a liquid level sensor and an agitator; the liquid level sensor and the agitator are arranged inside the immersion barrel; the liquid level sensor is used to collect the current liquid level of the immersion barrel; the agitator is used to stir and mix the raw materials in the immersion barrel.

[0017] In an optional manner, the solid raw material control device comprises: a meal feeder and a meal conveyor; the meal conveyor is connected to one end of the meal feeder, and the other end of the meal feeder is connected to the inlet of the impregnation barrel; the DCS control system is specifically used for:

[0018] The current meal feeding speed of the meal feeder is determined according to the current liquid level of the impregnation barrel.

[0019] In an optional manner, the liquid raw material control device includes: an alkali adding valve and an alkali adding flow meter; the alkali adding valve is connected to one end of the alkali adding flow meter, and the other end of the alkali adding flow meter is connected to the inlet of the impregnation barrel; the DCS control system is specifically used for:

[0020] The current alkali addition flow rate of the alkali addition flow meter is determined according to the current meal feeding amount.

[0021] In an optional manner, a conveyor belt is provided on the meal feeder, and a weighing sensor is provided on the conveyor belt; the weighing sensor is used to check the current meal feeding amount of the meal feeder.

[0022] In an optional manner, the DCS control system is also used for:

[0023] The actual bath ratio coefficient is calculated according to the current meal feeding amount fed back by the weighing sensor and the current alkali addition flow fed back by the alkali addition flowmeter.

[0024] In a second aspect, the present invention provides a method for preparing solid and liquid raw materials by mixing in a production process, and the technical solution of the method is as follows:

[0025] Determine the current meal feeding amount of the solid raw material control device according to the current liquid level of the mixing and preparing device, and determine the current alkali addition flow rate of the liquid raw material control device according to the current meal feeding amount;

[0026] The solid raw material control device is controlled to feed the target solid raw material to the mixing preparation device according to the current meal feeding amount, and the liquid raw material control device is controlled to feed the target liquid raw material to the mixing preparation device according to the current alkali addition flow rate, so as to perform stirring and mixing preparation through the mixing preparation device.

[0027] The beneficial effects of the solid-liquid raw material mixing preparation method in a production process of the present invention are as follows:

[0028] The method of the present invention can ensure uniform mixing of solid and liquid raw materials, ensure the continuity of the production process, greatly shorten the mixing preparation time, and improve production efficiency.

[0029] On the basis of the above scheme, a method for preparing solid-liquid raw materials by mixing in a production process of the present invention can also be improved as follows.

[0030] In an optional manner, the current meal feeding amount of the solid raw material control device is determined according to the current liquid level of the mixing and preparation device, and the step of determining the current meal feeding amount includes:

[0031] The current meal feeding speed of the solid raw material control device is determined according to the current liquid level of the mixing and preparation device, and the current meal feeding amount of the solid raw material control device is determined according to the expected bath ratio coefficient and the current meal feeding speed.

[0032] In an optional manner, the mixing and preparation device includes: an immersion barrel, a liquid level sensor and an agitator; the liquid level sensor and the agitator are arranged inside the immersion barrel; the liquid level sensor is used to collect the current liquid level of the immersion barrel; the agitator is used to stir and mix the raw materials in the immersion barrel.

[0033] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0035] Figure 1 This is a production flow chart for mixing solid raw materials with liquid raw materials in traditional production;

[0036] Figure 2 This is a comparison diagram of the production process of mixing solid raw materials and liquid raw materials;

[0037] Figure 3 A schematic structural diagram of an embodiment of a system for preparing a mixture of solid and liquid raw materials in a production process of the present invention;

[0038] Figure 4 It is the principle schematic diagram of the solid raw material control device;

[0039] Figure 5 It is the principle schematic diagram of the liquid raw material control device;

[0040] Figure 6 The present invention is a schematic flow chart of an embodiment of a method for preparing a mixture of solid and liquid raw materials in a production process. DETAILED DESCRIPTION

[0041] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0042] Figure 3FIG. 1 is a schematic diagram showing a structure of an embodiment of a system 10 for preparing a solid-liquid raw material mixture in a production process provided by the present invention. Figure 3 As shown, the system 10 includes: a DCS control system 11, a solid raw material control device 12, a liquid raw material control device 13 and a mixing preparation device 14. The solid raw material control device 12 and the liquid raw material control device 13 are respectively connected to the mixing preparation device 14, and the DCS control system 11 is respectively connected to the solid raw material control device 12, the liquid raw material control device 13 and the mixing preparation device 14. The DCS control system 11 is used to:

[0043] According to the current liquid level of the mixing preparation device 14, the current meal feeding amount of the solid raw material control device 12 is determined, and according to the current meal feeding amount, the current alkali addition flow rate of the liquid raw material control device 13 is determined.

[0044] Among them, the current liquid level is the liquid level of the mixing preparation device 14 at the current moment, the current meal feeding amount is the meal feeding amount of the solid raw material control device 12 at the current moment, and the current alkali addition flow rate is the alkali addition flow rate of the liquid raw material control device 13 at the current moment.

[0045] The solid raw material control device 12 is controlled to feed the target solid raw material to the mixing preparation device 14 according to the current meal feeding amount, and the liquid raw material control device 13 is controlled to feed the target liquid raw material to the mixing preparation device 14 according to the current alkali addition flow rate, so as to perform stirring and mixing preparation through the mixing preparation device 14.

[0046] Among them, the DCS control system 11 sends a PID control instruction to the solid raw material control device 12, and controls the solid raw material control device 12 to feed the target solid raw material to the mixing preparation device 14 according to the current meal feeding amount. The DCS control system 11 sends a PID control instruction to the liquid raw material control device 13, and controls the liquid raw material control device 13 to feed the target liquid raw material to the mixing preparation device 14 according to the current alkali addition flow rate. The mixing preparation device 14 has a stirring function, and can mix and stir the raw materials fed into the mixing preparation device 14. The solid raw material fed by the solid raw material control device 12 is pulp, and the liquid raw material fed by the liquid raw material control device 13 is caustic soda. After mixing and preparation by the mixing preparation device 14, a wet raw material "pulp porridge" is obtained, and the "pulp porridge" is used to produce viscose staple fibers.

[0047] In an optional manner, the DCS control system 11 is specifically used for:

[0048] The current meal feeding speed of the solid raw material control device 12 is determined according to the current liquid level of the mixing and preparing device 14, and the current meal feeding amount of the solid raw material control device 12 is determined according to the expected bath ratio coefficient and the current meal feeding speed.

[0049] The current meal feeding speed is the meal feeding speed of the solid raw material control device 12 at the current moment. The desired bath ratio coefficient is set according to actual needs and is not limited here.

[0050] It should be noted that the current meal feeding speed is obtained by feedback based on the PID control of the current liquid level.

[0051] In an optional manner, the mixing and preparing device 14 includes: a dipping bucket 1, a liquid level sensor and a stirrer.

[0052] Among them, the liquid level sensor and the agitator are arranged inside the dipping barrel; the liquid level sensor is used to collect the current liquid level of the dipping barrel; the agitator is used to stir and mix the raw materials in the dipping barrel.

[0053] In an optional manner, the solid raw material control device 12 includes: a meal feeder 2 and a meal conveyor 3 .

[0054] Among them, Figure 4 As shown, the meal feeder 3 is connected to one end of the meal feeder 2, and the other end of the meal feeder 2 is connected to the inlet of the soaking barrel 1. The DCS control system 11 is specifically used for:

[0055] According to the current liquid level of the impregnation barrel 1, the current meal feeding speed of the meal feeder 2 is determined.

[0056] In an optional manner, the liquid raw material control device 13 includes: an alkali addition valve 4 and an alkali addition flow meter 6 .

[0057] Among them, Figure 5 As shown, the alkali adding valve 4 is connected to one end of the alkali adding flow meter 6 , and the other end of the alkali adding flow meter 6 is connected to the inlet of the dipping barrel 1 .

[0058] It should be noted that the alkali adding valve 4, the alkali adding flow meter 6 and the dipping barrel 1 are connected through an alkali adding pipeline.

[0059] The DCS control system 11 is specifically used to determine the current alkali addition flow rate of the alkali addition flow meter 6 according to the current meal feeding amount.

[0060] In an optional manner, a conveyor belt is provided on the meal feeder 2 , and a weighing sensor 5 is provided on the conveyor belt; the weighing sensor 5 is used to check the current meal feeding amount of the meal feeder 2 .

[0061] The weighing sensor 5 directly obtains the current pulp weight of the pulp feeder 2. According to the formula: T = Q * V 喂 *(1-a%) / L can be used to calculate the current feed meal amount. T is the current feed meal amount, Q is the current pulp weight, V 喂 is the current meal feeding speed, a% is the moisture content of pulp, and L is the conveyor belt length of the meal feeder.

[0062] It should be noted that according to the formula: W 碱 =Kw*T / (C 碱 * 碱 ) calculates the current alkali addition flow rate of the alkali addition flow meter 6. 碱 is the current alkali addition flow rate, Kw is the expected bath ratio coefficient, C 碱 is the concentration of caustic soda, ρ 碱 is the density of caustic soda.

[0063] In an optional manner, the DCS control system 11 is also used for:

[0064] The actual bath ratio coefficient is calculated based on the current meal feeding amount fed back by the weighing sensor 5 and the current alkali addition flow fed back by the alkali addition flowmeter 6.

[0065] According to the formula: K = X 碱 *C 碱 * 碱 / T calculates the actual bath ratio coefficient at the current moment, K is the actual bath ratio coefficient, X 碱 is the actual alkali addition flow rate.

[0066] Specifically, the DCS control system 11 can output the actual bath ratio coefficient and the expected bath ratio coefficient in real time through a display terminal (mobile phone, computer, tablet, etc.), and output a warning message when the difference between the two is greater than a threshold.

[0067] In this embodiment, it should be noted that:

[0068] 1) When the active amount (meal feeding amount) changes dramatically, the driven amount (alkali addition flow) cannot follow the change in time, which may cause incomplete pulp alkali solution dissolution process and cause the load of the impregnation barrel stirring equipment to increase. In order to avoid the occurrence of disadvantages, the actual bath ratio coefficient display function is designed in this embodiment for real-time warning.

[0069] 2) When the active quantity (meal feeding amount) changes, the driven quantity (alkali addition flow rate) obtained through real-time calculation is used as the given value of the PID corresponding to the alkali addition flowmeter 6. When the alkali addition flow rate is disturbed, the output signal of the alkali addition valve 4 will change, and the closed driven loop will perform fixed value control. When the amount of pulp fed into the impregnation barrel 1 per unit time changes, the corresponding output will also change, and the valve opening controlling the alkali addition flow rate will respond accordingly to keep the set ratio unchanged.

[0070] 3) The DCS control system 11 is arranged outside each device. The speed of the meal feeder 2, the speed of the meal delivery machine 3, the weighing weight, the alkali adding valve 4, and the alkali adding flowmeter 6 are connected to the DCS system 11 for control. The DCS control system 11 is provided with PID control of the liquid level of the soaking barrel, the speed of the meal feeder, and the speed of the meal delivery machine. The output of the soaking barrel liquid level PID controller is connected with the set value of the speed PID of the meal feeder 2 and the meal delivery machine 3 to form a cascade control. By adjusting the speed of the meal feeder 2 and the speed of the meal delivery machine 3, the amount of pulp input into the soaking barrel 1 per unit time is changed, and the adjustment of the soaking barrel liquid level is realized.

[0071] The technical solution of this embodiment can ensure uniform mixing of solid and liquid raw materials, ensure the continuity of the production process, greatly shorten the mixing preparation time, and improve production efficiency.

[0072] Figure 6 The schematic diagram of the process of the embodiment of the method for preparing the mixing of solid and liquid raw materials in the production process provided by the present invention is shown, which is executed by the DCS control system. Figure 6 As shown, the following steps are included:

[0073] S1. According to the current liquid level of the mixing and preparing device, the current meal feeding amount of the solid raw material control device is determined, and according to the current meal feeding amount, the current alkali addition flow rate of the liquid raw material control device is determined.

[0074] S2. Control the solid raw material control device to feed the target solid raw material to the mixing preparation device according to the current meal feeding amount, and control the liquid raw material control device to feed the target liquid raw material to the mixing preparation device according to the current alkali addition flow rate, so as to perform stirring and mixing preparation through the mixing preparation device.

[0075] In an optional manner, the current meal feeding amount of the solid raw material control device is determined according to the current liquid level of the mixing and preparation device, and the step of determining the current meal feeding amount includes:

[0076] The current meal feeding speed of the solid raw material control device is determined according to the current liquid level of the mixing and preparing device, and the current meal feeding amount of the solid raw material control device is determined according to the expected bath ratio coefficient and the current meal feeding speed.

[0077] In an optional manner, the mixing and preparation device includes: an immersion barrel, a liquid level sensor and an agitator; the liquid level sensor and the agitator are arranged inside the immersion barrel; the liquid level sensor is used to collect the current liquid level of the immersion barrel; the agitator is used to stir and mix the raw materials in the immersion barrel.

[0078] In an optional manner, the solid raw material control device comprises: a meal feeder and a meal delivery machine; the meal delivery machine is connected to one end of the meal feeder, and the other end of the meal feeder is connected to the inlet of the impregnation barrel; the step of determining the current meal feeding speed of the solid raw material control device according to the current liquid level of the mixing and preparation device comprises:

[0079] The current meal feeding speed of the meal feeder is determined according to the current liquid level of the impregnation barrel.

[0080] In an optional manner, the liquid raw material control device comprises: an alkali adding valve and an alkali adding flow meter; the alkali adding valve is connected to one end of the alkali adding flow meter, and the other end of the alkali adding flow meter is connected to the inlet of the impregnation barrel; the step of determining the current alkali adding flow of the liquid raw material control device according to the current meal feeding amount comprises:

[0081] According to the current meal feeding amount, the current alkali addition flow rate of the alkali addition flow meter is determined.

[0082] In an optional manner, a conveyor belt is provided on the meal feeder, and a weighing sensor is provided on the conveyor belt; the weighing sensor is used to check the current meal feeding amount of the meal feeder.

[0083] In an optional manner, the method further includes:

[0084] The actual bath ratio coefficient is calculated based on the current meal feeding amount fed back by the weighing sensor and the current alkali addition flow fed back by the alkali addition flowmeter.

[0085] It should be noted that the beneficial effects of the method for preparing a mixture of solid and liquid raw materials in the production process provided by the above embodiment are the same as the beneficial effects of the system for preparing a mixture of solid and liquid raw materials in the production process provided by the above embodiment, and will not be described in detail here. In addition, the system and method embodiments provided by the above embodiment belong to the same concept, and the specific implementation process thereof is detailed in the method embodiment, and will not be described in detail here.

[0086] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Wherein, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the present invention.

[0087] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A system for mixing solid and liquid raw materials in a production process, characterized in that: include: A DCS control system, a solid raw material control device, a liquid raw material control device and a mixing preparation device; the solid raw material control device and the liquid raw material control device are respectively connected to the mixing preparation device, and the DCS control system is respectively connected to the solid raw material control device, the liquid raw material control device and the mixing preparation device; the DCS control system is used to: Determine the current meal feeding amount of the solid raw material control device according to the current liquid level of the mixing and preparing device, and determine the current alkali addition flow rate of the liquid raw material control device according to the current meal feeding amount; The solid raw material control device is controlled to feed the target solid raw material to the mixing preparation device according to the current meal feeding amount, and the liquid raw material control device is controlled to feed the target liquid raw material to the mixing preparation device according to the current alkali addition flow rate, so as to perform stirring and mixing preparation through the mixing preparation device.

2. The system for mixing and preparing solid and liquid raw materials in a production process according to claim 1, characterized in that: The DCS control system is specifically used for: The current meal feeding speed of the solid raw material control device is determined according to the current liquid level of the mixing and preparation device, and the current meal feeding amount of the solid raw material control device is determined according to the expected bath ratio coefficient and the current meal feeding speed.

3. The system for mixing solid and liquid raw materials in a production process according to claim 2, characterized in that: The mixing and preparing device comprises: an immersion barrel, a liquid level sensor and an agitator; the liquid level sensor and the agitator are arranged inside the immersion barrel; the liquid level sensor is used to collect the current liquid level of the immersion barrel; the agitator is used to stir and mix the raw materials in the immersion barrel.

4. The system for mixing and preparing solid and liquid raw materials in a production process according to claim 3, characterized in that: The solid raw material control device comprises: a meal feeder and a meal delivery machine; the meal delivery machine is connected to one end of the meal feeder, and the other end of the meal feeder is connected to the inlet of the impregnation barrel; the DCS control system is specifically used for: The current meal feeding speed of the meal feeder is determined according to the current liquid level of the impregnation barrel.

5. The system for mixing solid and liquid raw materials in a production process according to claim 4, characterized in that: The liquid raw material control device comprises: an alkali adding valve and an alkali adding flow meter; the alkali adding valve is connected to one end of the alkali adding flow meter, and the other end of the alkali adding flow meter is connected to the inlet of the impregnation barrel; the DCS control system is specifically used for: The current alkali addition flow rate of the alkali addition flow meter is determined according to the current meal feeding amount.

6. The system for mixing and preparing solid and liquid raw materials in a production process according to claim 5, characterized in that: A conveyor belt is arranged on the meal feeder, and a weighing sensor is arranged on the conveyor belt; the weighing sensor is used to check the current meal feeding amount of the meal feeder.

7. The system for mixing and preparing solid and liquid raw materials in a production process according to claim 6, characterized in that: The DCS control system is also used for: The actual bath ratio coefficient is calculated according to the current meal feeding amount fed back by the weighing sensor and the current alkali addition flow fed back by the alkali addition flowmeter.

8. A method for preparing solid and liquid raw materials by mixing in a production process, characterized in that: include: Determine the current meal feeding amount of the solid raw material control device according to the current liquid level of the mixing and preparing device, and determine the current alkali addition flow rate of the liquid raw material control device according to the current meal feeding amount; The solid raw material control device is controlled to feed the target solid raw material to the mixing preparation device according to the current meal feeding amount, and the liquid raw material control device is controlled to feed the target liquid raw material to the mixing preparation device according to the current alkali addition flow rate, so as to perform stirring and mixing preparation through the mixing preparation device.

9. The method for preparing solid and liquid raw materials by mixing in a production process according to claim 8, characterized in that: According to the current liquid level of the mixing and preparing device, the current meal feeding amount of the solid raw material control device is determined, and according to the current meal feeding amount, the step includes: The current meal feeding speed of the solid raw material control device is determined according to the current liquid level of the mixing and preparation device, and the current meal feeding amount of the solid raw material control device is determined according to the expected bath ratio coefficient and the current meal feeding speed.

10. The method for preparing solid and liquid raw materials by mixing in a production process according to claim 9, characterized in that: The mixing and preparing device comprises: an immersion barrel, a liquid level sensor and an agitator; the liquid level sensor and the agitator are arranged inside the immersion barrel; the liquid level sensor is used to collect the current liquid level of the immersion barrel; the agitator is used to stir and mix the raw materials in the immersion barrel.

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