A fully automatic ethanol blending system and method

Abstract

The present invention provides a fully automatic ethanol blending system and method. This system utilizes a full-operation-condition model to incorporate intelligent algorithms, enabling precise control of medium selection and input volume for the ethanol blending system. After the media are mixed, fine-tuning of the concentration is performed to accurately and quickly achieve the desired ethanol blend. This control scheme has been tested in actual production and demonstrated excellent results. Based on the actual specifications and inventory of various ethanol varieties in the workshop, the system fully automatically selects the blending medium that meets the production requirements, automatically calculates the recovered ethanol concentration based on the ambient temperature, and fully automatically blends the medium to meet customer needs.

Description

Technical Field

[0001] The present invention belongs to the field of ethanol blending, and in particular relates to a fully automatic ethanol blending system and method. Background Art

[0002] my country's pharmaceutical, food, health care, and beverage industries are currently booming, and the demand for ethanol blending systems is increasing, with increasingly higher levels of automation and intelligence required. In terms of fully automatic control, existing alcohol blending systems often have problems with increasing automation and requiring more manual intervention in the process. Since high-standard manufacturers usually focus on the utilization of recycled dilute ethanol in the production process, it is necessary to accurately measure the concentration of recycled dilute ethanol at different ambient temperatures, the same type of recycled ethanol cannot be used in the blending process of producing other types of ethanol, and the concentration of the blended ethanol needs to be accurately controlled. For the above production requirements, general automatic blending systems are unable to achieve fully automatic production blending. Manual selection of blending media and manual calculation of recovered ethanol concentration are required. This often results in mixed production due to incorrect analysis of ethanol varieties in the workshop, seriously affecting product quality. Inaccurate measurements also often result in the blended alcohol failing to meet the user's requirements for concentration and volume of blended alcohol. Summary of the Invention

[0003] The purpose of the present invention is to provide a fully automatic ethanol blending system and method, which can automatically select a blending medium that meets the production variety requirements based on the actual varieties and specifications of various ethanol in the workshop and their inventory, automatically calculate the recovered ethanol concentration based on the ambient temperature, and fully automatically blend the medium to meet customer needs.

[0004] A fully automatic ethanol blending system comprises an ethanol blending tank; the top and bottom of the ethanol blending tank are respectively connected to a drinking water channel and a sewage channel; the ethanol blending tank is connected to a delivery channel, which is connected to a concentrated ethanol channel, a fresh ethanol channel, and a dilute ethanol channel; the delivery channel is also connected to a channel for delivering the blended ethanol to production and use and a circulation / delivery pump, which is connected to the sewage channel; the fully automatic ethanol blending system is controlled by a human-machine interface operation panel.

[0005] Furthermore, the concentrated ethanol channel, fresh ethanol channel and dilute ethanol channel are connected to the concentrated ethanol tank, fresh ethanol tank and dilute ethanol tank respectively. The concentrated ethanol tank, fresh ethanol tank, dilute ethanol tank and ethanol blending tank are all equipped with variety name setting and transmission functions, so that the system can accurately identify the media allowed to participate in this ethanol blending.

[0006] Furthermore, the ethanol blending tank is provided with an ethanol temperature monitoring transmitter and an ethanol liquid level detection radar level meter, and the delivery channel is provided with a density / flow monitoring mass flow meter.

[0007] A fully automatic ethanol preparation method comprises the following steps:

[0008] S1, inputting the product name, target concentration, target volume, and concentrations of concentrated ethanol and fresh ethanol required for ethanol preparation in the human-computer interaction interface operation panel;

[0009] S2: The system automatically identifies the product name of each recovered dilute ethanol storage tank and concentrated ethanol storage tank. If the product name matches the target product name, the ethanol in the ethanol storage tank will be allowed to participate in the preparation. If it does not match, the algorithm prohibits the preparation process.

[0010] In step S3, the system automatically opens the relevant automatic valves and delivery pumps to deliver the recovered dilute ethanol, which matches the target product, to the ethanol blending tank. When the ethanol in the blending tank reaches a certain level, the system automatically opens the relevant automatic valves and circulation / delivery pumps. As the recovered dilute ethanol enters the ethanol blending tank and circulates, it passes through a mass flow meter to collect the ethanol density in the blending tank in real time. Based on the concentration of the recovered dilute ethanol and the total volume of dilute ethanol collected by the system in the previous stage, the system analyzes and enters different blending modes:

[0011] If the recovered dilute ethanol concentration is greater than the target ethanol concentration:

[0012] The system first determines whether the total amount of recovered dilute ethanol meets the user's needs by mixing the dilute ethanol with the workshop drinking water. The total amount of pure ethanol before and after ethanol mixing remains unchanged, and is calculated according to the following formula:

[0013]

[0014] Among them, V h is the total amount of dilute ethanol required in this mode, C h is the dilute ethanol concentration after conversion by the algorithm, V is the target ethanol preparation volume, and C is the target ethanol preparation concentration;

[0015] If the recovered dilute ethanol concentration is less than the target ethanol concentration:

[0016] The priority is to analyze the mode of mixing dilute ethanol and concentrated ethanol, based on the fact that the total amount of pure ethanol before and after mixing remains unchanged, and the volume relationship formula:

[0017]

[0018] If the product names corresponding to all the recovered dilute ethanol storage tanks in the workshop do not meet the preparation conditions, the system will give priority to distilled concentrated ethanol as the preparation medium, and first determine the preparation method of concentrated ethanol and drinking water. The total amount of pure ethanol before and after ethanol preparation remains unchanged:

[0019]

[0020] S4, after all media in the system judgment mode are input into the mixing tank according to the algorithm, the system enters the circulation concentration detection mode. After the cycle is completed, the system detects the solution concentration through the mass flow meter. If it meets the user's concentration error range, the mixing is completed; if the concentration is higher than the user's concentration error range, the system automatically opens the mixing tank to enter the drinking water valve for 5 seconds and then circulates to the set time and re-tests; if the concentration is lower than the user's concentration error range, the system automatically opens the relevant automatic valves and delivery pumps, inputs fresh ethanol for 5 seconds and then circulates to the set time and re-tests; the mixing is completed until the concentration of the ethanol solution meets the user's concentration error range.

[0021] Furthermore, if the concentration of the recovered dilute ethanol is greater than the target ethanol concentration, the following modes are included in S3:

[0022] Mode 1, if V h If the total amount of dilute ethanol recovered in the workshop that meets the variety conditions is less than the actual amount collected by the system, the system will automatically continue to input dilute ethanol after the calculation is completed until the mass flow meter measures that the total amount of dilute ethanol entering is V11, and the dilute ethanol liquid feeding is terminated. After the dilute ethanol liquid feeding is completed, the system automatically opens the automatic valve for drinking water in the mixing tank and inputs drinking water into the mixing tank. The total volume of ethanol solution in the mixing tank can be obtained based on the liquid level in the mixing tank measured by the radar level gauge, the cross-sectional area of ​​the equipment column, and the volume of the equipment head. When the total volume of the ethanol solution reaches V, the input of drinking water is stopped, that is, this mode ends the mixing medium input process;

[0023] Mode 2: If V h If the total amount of dilute ethanol recovered is greater than the actual amount of dilute ethanol collected by the system and meets the production conditions in the workshop, the system will give priority to calculating the mixing mode using dilute ethanol, concentrated ethanol and drinking water. The total amount of pure ethanol before and after ethanol mixing remains unchanged, and the calculation is based on the following formula:

[0024]

[0025] Among them, V H is the total amount of dilute ethanol that meets the variety requirements in the workshop, V e is the total amount of concentrated ethanol required, C e is the concentration of concentrated ethanol;

[0026] Mode 3, if V e If the total amount of concentrated ethanol is greater than the actual amount that meets the variety requirements, dilute ethanol, concentrated ethanol, fresh ethanol and drinking water are used for blending. The total amount of pure ethanol before and after blending remains unchanged. The algorithm is calculated according to the following formula:

[0027]

[0028] Among them, VE is the total amount of concentrated ethanol that meets the variety requirements in the workshop, V n is the total amount of fresh ethanol required, C n is the fresh ethanol concentration.

[0029] Furthermore, if the concentration of the recovered dilute ethanol in S3 is lower than the target ethanol concentration, the following modes are included:

[0030] Mode 4, if V h , V e If both are less than the total amount of dilute ethanol and concentrated ethanol in the workshop, dilute ethanol and concentrated ethanol can be selected for blending. After the calculation is completed, the system automatically inputs V into the blending tank through the mass flow meter. h After recovering the dilute ethanol of volume, open the relevant automatic valves and delivery pumps to input V into the mixing tank. e volume of concentrated ethanol, that is, this mode ends the process of inputting the prepared medium;

[0031] Mode 5, if V h Less than the total amount of dilute ethanol in the workshop, and V e If the amount is greater than the total amount of concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol, and fresh ethanol are selected for blending. The total amount of pure ethanol before and after blending remains unchanged, and the volume relationship formula is:

[0032]

[0033]

[0034] Mode 6, if V h Greater than the total amount of dilute ethanol in the workshop, and V e If the amount of pure ethanol is less than the total amount of concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol, and drinking water can be selected for mixing. The total amount of pure ethanol before and after mixing remains unchanged:

[0035]

[0036] Mode 7, if V h , V e If the amounts of dilute ethanol, concentrated ethanol and fresh ethanol are respectively greater than the total amount of dilute ethanol and concentrated ethanol in the workshop, then dilute ethanol, concentrated ethanol, fresh ethanol and drinking water can be mixed, and the solution is called mode three.

[0037] Furthermore, in S3, if the product names in the corresponding system of all recovered dilute ethanol storage tanks in the workshop do not meet the preparation conditions, the following modes are included:

[0038] Mode 8, if V e If the total amount of concentrated ethanol in the workshop is less than the total amount of concentrated ethanol, the system will select the solution of mixing concentrated ethanol with drinking water. After the calculation is completed, the system will automatically input V into the mixing tank through the mass flow meter. eAfter the volume of concentrated ethanol is reached, open the drinking water valve on the top of the tank and input drinking water into the mixing tank until the total volume of the ethanol solution in the mixing tank reaches V;

[0039] Mode nine, if V e If the amount is greater than the total amount of concentrated ethanol in the workshop, a blending scheme of concentrated ethanol, fresh ethanol and drinking water is selected, based on the fact that the total amount of pure ethanol before and after blending remains unchanged:

[0040]

[0041] Mode 10: If the product names in the corresponding system of all the recovered dilute ethanol storage tanks and concentrated ethanol tanks in the workshop do not meet the product conditions, the method of mixing fresh ethanol with drinking water is selected, and the total amount of pure ethanol before and after ethanol mixing remains unchanged:

[0042]

[0043] The beneficial effects of the present invention are:

[0044] 1. After the mass flow meter measures the actual density of ethanol, the system can accurately determine the actual concentration of dilute ethanol and prepared ethanol;

[0045] 2. This invention combines the user's input of the desired ethanol type, target concentration, and volume with the collected data on the types of equipment in the workshop and the ethanol volume in the equipment to select the appropriate ethanol preparation mode through an algorithm;

[0046] 3. The present invention calculates the volume of all media required for this preparation through algorithms in different modes, and then sequentially adds liquids for preparation according to the order of liquid addition set in the mode;

[0047] 4. The system of the present invention operates stably, accurately controls concentration and volume, has low algorithm system overhead, saves ethanol raw material costs, saves labor costs, and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a diagram of the equipment structure of the fully automatic ethanol blending system of the present invention;

[0049] Figure 2 is the ethanol density-concentration curve of the present invention;

[0050] Figure 3 This is the ethanol density-concentration parameter comparison table 1 of the present invention;

[0051] Figure 4 This is the ethanol density-concentration parameter comparison table 2 of the present invention;

[0052] Figure 5 This is the operating panel of the fully automatic ethanol blending system of the present invention. DETAILED DESCRIPTION

[0053] The present invention will be further described below with reference to the accompanying drawings.

[0054] like Figure 1 As shown in the figure, the main actuators and measuring devices of the system are as follows:

[0055] Ethanol temperature monitoring transmitter TE1, ethanol liquid level detection radar level meter LT1, density / flow monitoring mass flowmeter AIT1.

[0056] Before starting the system algorithm, first operate the human-computer interaction interface panel (such as Figure 5 ) Input the product variety name that needs to be involved in the production of this ethanol preparation, the target concentration of the expected ethanol after preparation, the target volume, the concentration of concentrated ethanol (high-concentration ethanol after recovering dilute ethanol and purifying it through an ethanol distillation tower). The concentration of high-concentration alcohol purified by the same ethanol distillation tower during each normal production process is basically the same. You can directly input it based on production experience, as well as the concentration of fresh ethanol (transferred from outside the workshop to the workshop by an ethanol transport truck, the concentration is the standard value).

[0057] After the target parameters are entered, click the production start button. The system will automatically identify the product variety name of each recovered dilute ethanol storage tank and concentrated ethanol storage tank (delivered by the previous production equipment within the control system). If it is consistent with the target variety name, the ethanol in the ethanol storage tank will be allowed to participate in this preparation. If it is inconsistent, the algorithm will prohibit this preparation process.

[0058] Based on the principle of recycling ethanol used in production, the algorithm prioritizes recycled dilute ethanol as the blending medium. That is, if any dilute ethanol storage tank contains recycled ethanol with the same name as the target product, it must be used up first. Based on the above conditions, the algorithm enters the following modes in steps and levels:

[0059] If there is recycled dilute ethanol with the same name as the target product in any recycled dilute ethanol storage tank, the system will automatically open the relevant automatic valves and delivery pumps to deliver the recycled dilute ethanol with the same name as the target product to the ethanol blending tank. After the ethanol in the blending tank reaches a certain liquid level, it will automatically open the relevant automatic valves and circulation / delivery pumps to circulate the ethanol in the blending tank to ensure uniform ethanol concentration. According to the configuration of this system, the recycled dilute ethanol will pass through the mass flow meter when entering the ethanol blending tank and circulating to collect the ethanol density in the blending tank in real time. Figure 2 The ethanol density-concentration curve is written into the algorithm program, which can convert the ethanol concentration in the blending tank in real time. According to the concentration of the recovered dilute ethanol and the total volume of dilute ethanol collected by the system in the previous stage, the algorithm analyzes and enters different blending modes:

[0060] If the recovered dilute ethanol concentration is greater than the target ethanol concentration:

[0061] The algorithm first determines whether the total amount of recovered dilute ethanol can meet user needs by simply mixing the dilute ethanol with workshop drinking water. Based on the fact that the total amount of pure ethanol before and after mixing remains unchanged, the algorithm calculates the amount using the following formula:

[0062] V h C h =VC (1)

[0063] Among them, V h is the total amount of dilute ethanol required in this mode, C h is the dilute ethanol concentration after conversion by the algorithm, V is the target ethanol preparation volume, and C is the target ethanol preparation concentration.

[0064]

[0065] Mode 1: If V h If the total amount of dilute ethanol recovered in the workshop that meets the variety conditions is less than the actual amount collected by the system, the system will automatically continue to input dilute ethanol after the calculation is completed until the total amount of dilute ethanol measured by the mass flow meter is V h End the dilute ethanol liquid addition.

[0066] After the dilute ethanol is added, the system automatically opens the automatic valve for the drinking water inlet to the mixing tank, injecting drinking water into the tank. The total volume of the ethanol solution in the mixing tank is determined by the radar level gauge, the cross-sectional area of ​​the equipment column, and the volume of the equipment head. When the total volume of the ethanol solution reaches V, the drinking water supply stops, marking the end of the mixing medium input process in this mode.

[0067] Mode 2: If V h If the amount of dilute ethanol recovered is greater than the total amount of dilute ethanol actually recovered in the workshop that meets the production conditions, the system will prioritize the solution of mixing dilute ethanol, concentrated ethanol and drinking water. The total amount of pure ethanol before and after mixing remains unchanged, and the calculation is based on the following formula:

[0068] V H C h +V e C e =VC (3)

[0069] Among them, V H is the total amount of dilute ethanol that meets the variety requirements in the workshop, V e is the total amount of concentrated ethanol required, C e is the concentration of concentrated ethanol (if there is no concentrated ethanol that meets the variety conditions, the algorithm automatically determines C e =0), we can get:

[0070]

[0071] If V eThis mode can be used if the total amount of concentrated ethanol in the workshop that meets the variety conditions is less than the actual amount collected by the system.

[0072] After the calculation is completed, the system automatically inputs all the recovered dilute ethanol that meets the variety conditions into the blending tank through the mass flow meter, opens the relevant automatic valves and circulation / delivery pumps, and inputs V into the blending tank. e volume of concentrated ethanol, and finally open the drinking water valve on the tank top to input drinking water into the mixing tank until the total volume of ethanol solution in the tank reaches V, that is, this mode ends the mixing medium input process.

[0073] Mode 3: If V e If the total amount of concentrated ethanol is greater than the actual amount that meets the requirements, dilute ethanol, concentrated ethanol, fresh ethanol and drinking water will be used for blending. Assuming the total amount of pure ethanol before and after blending remains unchanged, the amount can be calculated using the following formula:

[0074] V H C h +V E C e +V n C n =VC (5)

[0075] Among them, V E is the total amount of concentrated ethanol that meets the variety requirements in the workshop, V n is the total amount of fresh ethanol required, C n is the fresh ethanol concentration, we can get:

[0076]

[0077] After the calculation is completed, the system automatically inputs all the recovered dilute ethanol that meets the variety conditions into the blending tank through the mass flow meter, opens the relevant automatic valves and delivery pumps, inputs all the concentrated ethanol that meets the variety conditions into the blending tank, and then inputs V into the blending tank. n volume of fresh ethanol, and finally open the drinking water valve on the tank top to input drinking water into the mixing tank until the total volume of ethanol solution in the mixing tank reaches V, that is, this mode ends the mixing medium input process.

[0078] If the concentration of recovered dilute ethanol is C h If the concentration of ethanol is less than the target ethanol concentration C, the algorithm will prioritize analyzing the mixing mode of dilute ethanol and concentrated ethanol, based on the fact that the total amount of pure ethanol before and after mixing remains unchanged, and the volume relationship formula:

[0079] V h C h +V e C e =VC (7)

[0080] Vh +V e =V (8)

[0081] We can get:

[0082]

[0083] Mode 4: If V h , V e If both are less than the total amount of dilute ethanol and concentrated ethanol in the workshop, dilute ethanol and concentrated ethanol can be selected for blending. After the calculation is completed, the system automatically inputs V into the blending tank through the mass flow meter. h After recovering the dilute ethanol of volume, open the relevant automatic valves and delivery pumps to input V into the mixing tank. e volume of concentrated ethanol, that is, this mode ends the preparation medium input process.

[0084] Mode 5: If V h Less than the total amount of dilute ethanol in the workshop, and V e If the amount is greater than the total amount of concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol, and fresh ethanol can be selected for blending. The total amount of pure ethanol before and after blending remains unchanged, and the volume relationship formula is:

[0085] V h C h +V E C e +V n C n =VC (11)

[0086] V h +V E +V n =V (12)

[0087] We can get:

[0088]

[0089] After the calculation is completed, the system automatically inputs V into the mixing tank through the mass flow meter. h After the volume of recovered dilute ethanol is reached, the relevant automatic valves and circulation / delivery pumps are opened to input all the concentrated ethanol that meets the variety conditions into the blending tank, and finally input V into the blending tank. n volume of fresh ethanol, that is, this mode ends the preparation medium input process.

[0090] Mode 6: If V h Greater than the total amount of dilute ethanol in the workshop, and V e If the amount of pure ethanol is less than the total amount of concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol, and drinking water can be selected for mixing. The total amount of pure ethanol before and after mixing remains unchanged:

[0091] VH C h +V e C e =VC (15)

[0092] We can get:

[0093]

[0094] After the calculation is completed, the system automatically inputs all the dilute ethanol that meets the variety conditions into the blending tank through the mass flow meter, opens the relevant automatic valves and delivery pumps, and inputs V into the blending tank. e volume of concentrated ethanol, and finally open the drinking water valve on the tank top to input drinking water into the mixing tank until the total volume of ethanol solution in the mixing tank reaches V, that is, this mode ends the mixing medium input process.

[0095] Mode 7: If V h , V e If the amounts of dilute ethanol, concentrated ethanol and fresh ethanol are respectively greater than the total amount of dilute ethanol and concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol, fresh ethanol and drinking water can be selected for mixing, and the algorithm scheme calls mode three.

[0096] If the product names corresponding to all the recovered dilute ethanol storage tanks in the workshop do not meet the preparation conditions, the system will give priority to distilled concentrated ethanol as the preparation medium, and first determine the preparation method of concentrated ethanol and drinking water. The total amount of pure ethanol before and after ethanol preparation remains unchanged:

[0097] V e C e =VC (17)

[0098] We can get:

[0099]

[0100] Mode 8: If V e If the total amount of concentrated ethanol in the workshop is less than the total amount of concentrated ethanol, the system will select the solution of mixing concentrated ethanol with drinking water. After the calculation is completed, the system will automatically input V into the mixing tank through the mass flow meter. e After adding a volume of concentrated ethanol, open the drinking water valve on the top of the tank and input drinking water into the mixing tank until the total volume of the ethanol solution in the mixing tank reaches V. This mode ends the mixing medium input process.

[0101] Mode 9: If V e If the amount is greater than the total amount of concentrated ethanol in the workshop, a blending scheme of concentrated ethanol, fresh ethanol and drinking water is selected, based on the fact that the total amount of pure ethanol before and after blending remains unchanged:

[0102] V E C e +V n C n=VC (19)

[0103] We can get:

[0104]

[0105] After the calculation is completed, the system automatically inputs all concentrated ethanol that meets the variety conditions into the blending tank through the mass flow meter, opens the relevant automatic valves and delivery pumps, and inputs V into the blending tank. n volume of fresh ethanol, open the drinking water valve on the tank top, and input drinking water into the mixing tank until the total volume of ethanol solution in the mixing tank reaches V, that is, this mode ends the mixing medium input process.

[0106] Mode 10: If the product names in the corresponding system of all the recovered dilute ethanol storage tanks and concentrated ethanol tanks in the workshop do not meet the product conditions, the method of mixing fresh ethanol with drinking water is selected, and the total amount of pure ethanol before and after ethanol mixing remains unchanged:

[0107] V n C n =VC (21)

[0108] We can get:

[0109]

[0110] After the calculation is completed, the mass flow meter is used to measure the flow, and the system automatically opens the relevant automatic valves and delivery pumps to input V into the mixing tank. n volume of fresh ethanol, open the drinking water valve on the tank top, and input drinking water into the mixing tank until the total volume of ethanol solution in the mixing tank reaches V, that is, this mode ends the mixing medium input process.

[0111] After all media in the mixing tank are input according to the algorithm in the system judgment mode, the system enters the circulation concentration detection mode. The system opens the relevant automatic valves and circulation / delivery pumps to circulate the ethanol solution in the mixing tank for the set time (if the mixing tank is equipped with a stirring motor, the stirring motor will be turned on simultaneously) to make the ethanol concentration evenly distributed.

[0112] After the cycle is completed, the system uses a mass flow meter to detect the solution concentration. If it meets the user's concentration error range, the preparation is completed; if the concentration is higher than the user's concentration error range, the system automatically opens the drinking water valve in the preparation tank for 5 seconds, circulates to the set time, and re-tests; if the concentration is lower than the user's concentration error range, the system automatically opens the relevant automatic valves and delivery pumps, inputs fresh ethanol for 5 seconds, circulates to the set time, and re-tests.

[0113] The preparation is completed when the concentration of the ethanol solution meets the user's concentration error range.

[0114] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fully automatic ethanol preparation method, characterized in that: The following steps are involved: S1, inputting the product name, target concentration, target volume, and concentrations of concentrated ethanol and fresh ethanol required for ethanol preparation in the human-computer interaction interface operation panel; S2: The system automatically identifies the product name of each recovered dilute ethanol storage tank and concentrated ethanol storage tank. If the product name matches the target product name, the ethanol in the ethanol storage tank will be allowed to participate in the preparation. If it does not match, the algorithm prohibits the preparation process. In step S3, the system automatically opens the relevant automatic valves and delivery pumps to deliver the recovered dilute ethanol, which matches the target product name, to the ethanol blending tank. When the ethanol in the blending tank reaches a certain level, the system automatically opens the relevant automatic valves and delivery pumps. When the recovered dilute ethanol enters the ethanol blending tank and circulates, it passes through a mass flow meter to collect the ethanol density in the blending tank in real time. Based on the concentration of the recovered dilute ethanol and the total volume of dilute ethanol collected by the system in the previous stage, different blending modes are entered through analysis: If the recovered dilute ethanol concentration is greater than the target ethanol concentration: The system first determines whether the total amount of recovered dilute ethanol meets the user's needs by mixing the dilute ethanol with the workshop drinking water. The total amount of pure ethanol before and after ethanol mixing remains unchanged, and is calculated according to the following formula: （1）， in, is the total amount of dilute ethanol required in this mode, is the concentration of dilute ethanol after conversion by the algorithm, Prepare the target ethanol volume. Prepare the target ethanol concentration; if the recovered dilute ethanol concentration is less than the target ethanol concentration: The priority is to analyze the mixing mode of dilute ethanol and concentrated ethanol, based on the fact that the total amount of pure ethanol before and after mixing remains unchanged, and the volume relationship before and after mixing: If the product names corresponding to all the recovered dilute ethanol storage tanks in the workshop do not meet the preparation conditions, the system will give priority to distilled concentrated ethanol as the preparation medium, and first determine the preparation method of concentrated ethanol and drinking water. The total amount of pure ethanol before and after ethanol preparation remains unchanged: S4. After all media required for the system judgment mode are input into the mixing tank according to the algorithm, the system enters the circulation concentration detection mode. After the cycle is completed, the system detects the solution concentration through the mass flow meter. If it meets the user's concentration error range, the mixing is completed; if the concentration is higher than the user's concentration error range, the system automatically opens the drinking water inlet valve of the mixing tank for 5 seconds, circulates to the set time, and re-tests; if the concentration is lower than the user's concentration error range, the system automatically opens the relevant automatic valves and delivery pumps, inputs fresh ethanol for 5 seconds, circulates to the set time, and re-tests; the mixing is completed until the concentration of the ethanol solution meets the user's concentration error range.

2. A fully automatic ethanol preparation method according to claim 1, characterized in that: The fully automatic ethanol blending method uses a fully automatic ethanol blending system, comprising an ethanol blending tank; the top and bottom of the ethanol blending tank are respectively connected to a drinking water channel and a sewage channel; the ethanol blending tank is connected to a delivery channel, which is connected to a concentrated ethanol channel, a fresh ethanol channel, and a dilute ethanol channel; the delivery channel is also connected to a channel for the blended ethanol to be used in production and a delivery pump, which is connected to a sewage channel; the fully automatic ethanol blending system is controlled by a human-computer interaction interface operation panel.

3. A fully automatic ethanol preparation method according to claim 2, characterized in that: The concentrated ethanol channel, fresh ethanol channel and dilute ethanol channel are connected to the concentrated ethanol tank, fresh ethanol tank and dilute ethanol tank respectively. The concentrated ethanol tank, fresh ethanol tank, dilute ethanol tank and ethanol blending tank are all equipped with variety name setting and transmission functions, so that the system can accurately identify the media allowed to participate in this ethanol blending.

4. A fully automatic ethanol preparation method according to claim 3, characterized in that: The alcohol blending tank is provided with an ethanol temperature monitoring transmitter and an ethanol liquid level detection radar level meter, and a mass flow meter is provided on the delivery channel.

5. A fully automatic ethanol preparation method according to claim 4, characterized in that: If the concentration of recovered dilute ethanol is greater than the target ethanol concentration, the following modes are included in S3: Mode 1: If If the total amount of dilute ethanol recovered in the workshop that meets the variety conditions is less than the actual amount collected by the system, the system will automatically continue to input dilute ethanol after the calculation is completed until the total amount of dilute ethanol measured by the mass flow meter is When the dilute ethanol liquid is fed, the system automatically opens the automatic valve for drinking water in the mixing tank and inputs drinking water into the mixing tank. The total volume of the ethanol solution in the mixing tank can be obtained by measuring the liquid level in the mixing tank, the cross-sectional area of ​​the equipment column and the volume of the equipment head according to the radar level gauge. When the total volume of the ethanol solution reaches Stop inputting drinking water when this mode ends the inputting process of the mixing medium; Mode 2: If If the total amount of dilute ethanol recovered is greater than the actual amount of dilute ethanol collected by the system and meets the production conditions in the workshop, the system will give priority to calculating the mixing mode using dilute ethanol, concentrated ethanol and drinking water. The total amount of pure ethanol before and after ethanol mixing remains unchanged, and the calculation is based on the following formula: in, is the total amount of dilute ethanol that meets the variety requirements in the workshop, is the total amount of concentrated ethanol required, is the concentration of concentrated ethanol; Mode 3: If If the total amount of concentrated ethanol is greater than the actual amount that meets the variety requirements, dilute ethanol, concentrated ethanol, fresh ethanol and drinking water are used for blending. The total amount of pure ethanol before and after blending remains unchanged. The algorithm is calculated according to the following formula: in, The total amount of concentrated ethanol that meets the variety requirements in the workshop, is the total amount of fresh ethanol required, is the fresh ethanol concentration.

6. A fully automatic ethanol preparation method according to claim 5, characterized in that: If the concentration of recovered dilute ethanol in S3 is less than the target ethanol concentration, the following modes are included: Mode 4: , If the total amount of dilute ethanol and concentrated ethanol in the workshop is less than the total amount of dilute ethanol and concentrated ethanol respectively, dilute ethanol and concentrated ethanol will be selected for blending. After the calculation is completed, the system automatically inputs the dilute ethanol and concentrated ethanol into the blending tank through the mass flow meter. After the volume of recovered dilute ethanol is reached, the relevant automatic valves and delivery pumps are opened to input the dilute ethanol into the blending tank. volume of concentrated ethanol, that is, this mode ends the process of inputting the prepared medium; Mode 5: If Less than the total amount of dilute ethanol in the workshop, and If the amount of pure ethanol is greater than the total amount of concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol, and fresh ethanol are selected for blending. The total amount of pure ethanol before and after blending remains unchanged, and the volume relationship before and after blending is as follows: Mode six, if Greater than the total amount of dilute ethanol in the workshop, and If the amount of pure ethanol is less than the total amount of concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol and drinking water are selected for mixing. The total amount of pure ethanol before and after mixing remains unchanged: Mode 7, if , If the amounts of dilute ethanol, concentrated ethanol and fresh ethanol are respectively greater than the total amount of dilute ethanol and concentrated ethanol in the workshop, dilute ethanol, concentrated ethanol and fresh ethanol are selected for mixing with drinking water, and the scheme calls mode three.

7. A fully automatic ethanol preparation method according to claim 6, characterized in that: In the above S3, if the product names corresponding to the system of all recovered dilute ethanol storage tanks in the workshop do not meet the preparation conditions, the following modes are included: Mode 8, if If the amount is less than the total amount of concentrated ethanol in the workshop, the system will select the solution of mixing concentrated ethanol with drinking water. After the calculation is completed, the system will automatically input the concentrated ethanol into the mixing tank through the mass flow meter. After the volume of concentrated ethanol is filled, open the drinking water valve on the tank top and input drinking water into the mixing tank until the total volume of ethanol solution in the mixing tank reaches ; Mode nine, if If the amount is greater than the total amount of concentrated ethanol in the workshop, a blending scheme of concentrated ethanol, fresh ethanol and drinking water is selected, based on the fact that the total amount of pure ethanol before and after blending remains unchanged: Mode 10: If the product names in the corresponding system of all the recovered dilute ethanol storage tanks and concentrated ethanol tanks in the workshop do not meet the product conditions, the method of mixing fresh ethanol with drinking water is selected, and the total amount of pure ethanol before and after ethanol mixing remains unchanged:

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