Ultrasonic atomization method and apparatus for wastewater evaporation concentration

Abstract

The present application relates to the technical field of ultrasonic atomization, and particularly relates to an ultrasonic atomization method and device for wastewater evaporation and concentration, which comprises the following steps: arranging multiple ultrasonic atomizers at the bottom of an atomization container; pouring wastewater into the atomization container to obtain the total amount of the wastewater, and then calculating the amount of the liquid to be atomized; calculating the atomization amount per unit time Q1 and the theoretical time T1 of the first round of atomization; running the ultrasonic atomizers at the rated amplitude Imax for a time period of 0.6•T1, and then calculating the atomization amount per unit time Q2, the theoretical time T2 and the intensity coefficient k2 of the second round of atomization; running the ultrasonic atomizers at the amplitude k2•Imax for a time period of 0.7•T2, and then calculating the atomization amount per unit time Q3, the theoretical time T3 and the intensity coefficient k3 of the third round of atomization; running the ultrasonic atomizers at the amplitude k3•Imax for a time period of T3, and then completing the atomization operation. The present application can effectively generate fine atomized droplets.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic atomization, and in particular to an ultrasonic atomization method and device for wastewater evaporation and concentration. BACKGROUND

[0002] In the process of wastewater treatment, the concentrated water produced after the RO (reverse osmosis) system filters the wastewater usually contains 1-3% of salt content (TDS), and directly entering a thermal evaporator (such as MVR or multi-effect evaporation) for concentration has extremely high energy consumption (150-250 kWh / ton of water), so the water in the wastewater needs to be atomized to enable it to be quickly evaporated. Since there are particles in the wastewater, in some existing atomization devices, the spraying device is easily clogged by the particles, and the atomized liquid droplets sprayed by a large nozzle are too large, resulting in low evaporation efficiency. In addition, the traditional atomization device can only continuously produce atomized liquid droplets in equal amounts due to the lack of control, and in the later stage of atomization, since the previous atomized liquid droplets have not been completely evaporated and the subsequent atomized liquid droplets are continuously produced, the atomized liquid droplets gradually become larger, resulting in reduced evaporation efficiency. SUMMARY

[0003] The present application provides an ultrasonic atomization method and device for wastewater evaporation and concentration, which can effectively solve the problems in the background art.

[0004] The present application provides an ultrasonic atomization method for wastewater evaporation and concentration, the steps of which include:

[0005] A plurality of ultrasonic atomizers are arranged at the bottom of the atomization container;

[0006] The wastewater is poured into the atomization container, the total amount of wastewater Mall is obtained, and then the amount of liquid Ml1 that needs to be atomized is calculated;

[0007] The atomization amount per unit time Q1 of the first round of atomization is calculated, and then the theoretical time T1 of the first round of atomization is calculated according to the remaining amount of liquid Ml1 that needs to be atomized;

[0008] After the ultrasonic atomizer is operated at the rated amplitude Imax for a duration of 0.6•T1, the atomization amount per unit time Q2 of the second round of atomization is calculated, and then the theoretical time T2 of the second round of atomization is calculated according to the remaining amount of liquid Ml2 that needs to be atomized; the intensity coefficient k2 of the second round of atomization is calculated;

[0009] After the ultrasonic atomizer is operated at an amplitude of k2•Imax for a duration of 0.7•T2, the atomization amount per unit time Q3 of the third round of atomization is calculated, and then the theoretical time T3 of the third round of atomization is calculated according to the remaining amount of liquid Ml3 that needs to be atomized; the intensity coefficient k3 of the third round of atomization is calculated;

[0010] After the ultrasonic atomizer is operated at an amplitude of k3•Imax for a duration of T3, the atomization operation is completed.

[0011] Further, the calculation method of the atomization amount per unit time is as follows:

[0012] Let the atomization amount per unit time of the nth round of atomization be Qn;

[0013] Qn=N•qmax•ηsha•ηratn•ηtimen;

[0014] Wherein, N is the number of ultrasonic atomizers;

[0015] qmax is the rated atomization amount per unit time of a single ultrasonic atomizer;

[0016] ηsha is the atomization container shape efficiency factor, which is related to the shape of the atomization container;

[0017] ηratn is the solid-liquid ratio efficiency factor of the nth round of atomization, which is related to the ratio of solids and liquids in the wastewater;

[0018] ηtimen is the time decay factor of the nth round of atomization, which is related to the cumulative duration of atomization.

[0019] Further, the specific algorithm of the atomization container shape efficiency factor ηsha is:

[0020] ηsha=exp[-0.5•(L / W-Ropt) 2 / σ 2 ];

[0021] Wherein, L is the length of the bottom of the atomization container;

[0022] W is the width of the bottom of the atomization container;

[0023] Ropt is the set optimal length-width ratio;

[0024] σ is the shape sensitivity, which is related to the shape of the bottom of the atomization container.

[0025] Further, the specific algorithm of the solid-liquid ratio efficiency factor ηratn is:

[0026] Let the liquid proportion before atomization be ω0;

[0027] Calculate the cumulative atomization amount from the 1st round to the (n-1)th round as ΣMln;

[0028] The liquid proportion ωn of the nth round is (Mall•ω0-ΣMln) / (Mall-ΣMln);

[0029] ηratn=ωn / (ωn+μ•(1-ωn));

[0030] Wherein, μ is the set solid obstruction coefficient.

[0031] Further, the specific algorithm of the time attenuation factor ηtimen is:

[0032] The actual time length of the first round to the n-1th round is calculated as ΣTexn;

[0033] ηtimen=1-α(ΣTexn / (ΣTexn+Tn)) β ;

[0034] Wherein, α is the set attenuation amplitude coefficient;

[0035] β is the set numerical case curve index.

[0036] Further, the specific algorithm of the intensity coefficient k2 of the second round of atomization is:

[0037] k2=0.8•((Ml1 / Q1) / (Ml1 / Q2)) 2 .

[0038] Further, the specific algorithm of the intensity coefficient k3 of the third round of atomization is:

[0039] k3=0.5•(Ml3 / Ml1)•((T1+T2) / T3) 0.5 .

[0040] Further, the temperature of the wastewater is monitored, and when the temperature exceeds the set threshold value, the work of the ultrasonic atomizer is suspended until the wastewater temperature is lower than the set value.

[0041] Further, when the adjacent two rounds of atomization are switched, the ultrasonic atomizer stops working for a set time and then works.

[0042] The application also provides an ultrasonic atomization device for wastewater evaporation and concentration, which is used to realize the above-mentioned ultrasonic atomization method for wastewater evaporation and concentration, comprising:

[0043] An atomization container, which is provided with a water inlet on the side and an open top;

[0044] A plurality of ultrasonic atomizers, which are arranged at the length direction center of the bottom of the atomization container and are distributed into two rows on the bottom of the atomization container, each row is parallel to the width direction of the atomization container, and the ultrasonic atomizers in the two rows are arranged staggeredly;

[0045] A filter, which is arranged inside the atomization container;

[0046] A collection cover, which is arranged on the top of the atomization container; the collection cover is provided with a collection pipe which is communicated with the outside;

[0047] A processor, which is used to control the vibration amplitude and vibration time length of the plurality of atomizers.

[0048] The technical scheme of the present application can achieve the following technical effects:

[0049] The present method adopts ultrasonic waves to atomize wastewater, which can effectively avoid the problem that traditional atomizing nozzles are prone to be blocked. Moreover, the present method adopts a three-stage atomization control strategy, and based on parameters such as the solid-liquid ratio and the cumulative atomization time in the three-stage atomization state, the ultrasonic atomization intensity and duration can be dynamically adjusted according to different atomization environments, so that the atomized droplets can be continuously kept in a small state during the atomization process, thereby facilitating subsequent evaporation. The entire atomization process can be automatically controlled by the processor, thereby reducing human intervention factors, and the accuracy and intelligence of the atomization process control can be effectively realized. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0051] Figure 1 The flow chart of the ultrasonic atomization method for wastewater evaporation and concentration in the present application;

[0052] Figure 2 The structural schematic diagram of the ultrasonic atomization device for wastewater evaporation and concentration in the present application;

[0053] The drawings are as follows: 1, atomizing container; 2, ultrasonic atomizer; 3, filter; 4, collection cover. DETAILED DESCRIPTION

[0054] The basic principles and main features of the technical solutions of the present application will be described below in combination with the drawings of the embodiments of the present application. The described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0055] In the description of the present application, the words indicating the orientation or positional relationship (such as up, down, left, right, etc.) are based on the orientation shown in the drawings or some conventional positional relationship, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the features referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0056] An ultrasonic atomization method for wastewater evaporation and concentration, comprising the steps of: Figure 1As shown, by three rounds of atomization, and each round of atomization adopts different atomization time and atomization intensity, so that the wastewater can correspond to the best atomization parameters at different solid-liquid ratio stages, and the specific steps of atomization operation are as follows:

[0057] First of all, prepare the hardware for atomization, set multiple ultrasonic atomizers at the bottom of the atomization container, the multiple ultrasonic atomizers are divided into two parallel groups, and the ultrasonic atomizers in the two groups are staggered, so that when the ultrasonic waves are generated, the vibration waves generated by the two groups of ultrasonic atomizers will produce phase difference, so that the two groups of waves produce destructive interference, which can effectively avoid the generation of standing wave, so that the vibration of the whole wastewater is more uniform, and the vibration of the middle area caused by standing wave is avoided. The vibration of the surrounding area is too small.

[0058] After that, pour the wastewater into the atomization container. Before pouring the wastewater, the total amount of wastewater Mall can be obtained by weighing, flow estimation and other methods, unit: kg. Then calculate the amount of liquid Ml1 that needs to be atomized, unit: kg; The user can set the amount of liquid Ml1 that needs to be atomized according to the specific needs, such as reducing the mass of liquid by 0.5 kg when the wastewater is concentrated, then Ml1=0.5 kg, or setting the proportion of the mass of liquid to be reduced in the total mass of wastewater, such as reducing 70% of the liquid, then Ml1=70%•Mall.

[0059] After pouring the wastewater, you can prepare to start the atomization operation. First, calculate the atomization amount Q1 per unit time of the first round of atomization, then calculate the first round of atomization theoretical time T1=Ml1 / Q1 according to the remaining liquid amount Ml1 that needs to be atomized, T1 represents the time required for the first round of atomization to directly atomize all the liquid amount Ml1 that needs to be atomized. In the first round of atomization, the working time of the ultrasonic atomizer is 0.6•T1, in this time, the liquid amount in the wastewater is relatively large, the distribution density of solid impurities in the liquid will be relatively small, and the atomization container has very few atomized droplets, therefore the ultrasonic atomizer can adopt the maximum rated amplitude to realize fast atomization, and the atomized droplets can be kept in a small state.

[0060] After the ultrasonic atomizer is operated for 0.6•T1 (i.e. after the first round of atomization) at the rated amplitude Imax, the atomization amount per unit time Q2 of the second round of atomization is calculated, and then according to the remaining liquid amount Ml2=Ml1-Q1•0.6•T1 that needs to be atomized, the theoretical time T2 of the second round of atomization is calculated, T2 indicating the time length required for atomizing all the remaining liquid amount Ml2. In the second round of atomization, the operation time of the ultrasonic atomizer is 0.7•T2, and in this time length, because a certain amount of liquid has been lost in the first round of atomization, the distribution density of the solid impurities in the wastewater increases significantly, and a certain amount of atomized droplets has been in the container, so the intensity coefficient k2 of the second round of atomization needs to be calculated to reduce the amplitude of the ultrasonic atomizer to k2•Imax, so as to reduce the atomization amount while avoiding damage to the ultrasonic atomizer and other components caused by excessive vibration of the solid impurities.

[0061] After the ultrasonic atomizer is operated for 0.7•T2 (i.e. after the second round of atomization) at the amplitude k2•Imax, the atomization amount per unit time Q3 of the third round of atomization is calculated, and then according to the remaining liquid amount Ml3=Ml1-Q1•0.6•T1-Q2•0.7•T2 that needs to be atomized, the theoretical time T3 of the third round of atomization is calculated, T3 indicating the time length required for atomizing all the remaining liquid amount Ml3. In the third round of atomization, the liquid has been further reduced by the second round of atomization, the distribution density of the solid impurities in the compound is extremely high, and the atomized droplets in the atomization container reach the maximum state, so the intensity coefficient k3 of the third round of atomization needs to be calculated to further reduce the amplitude of the ultrasonic atomizer to k3•Imax, so as to avoid the combination of the atomized droplets to form large droplets. After the ultrasonic atomizer is operated for T3 at the amplitude k3•Imax, the atomization operation is completed.

[0062] As described above, due to the destructive interference generated by the multiple ultrasonic atomizers in the special arrangement, the atomization amount of the entire ultrasonic atomizer array is not simply superimposed, but is affected by the shape of the atomization container; in addition, as the atomization proceeds, the change of the solid-liquid ratio also affects the atomization effect, and because the container is gradually filled with atomized droplets over time, the overall operation time also affects the atomization effect. When calculating the atomization amount per unit time, the above factors need to be considered comprehensively, and the specific calculation method is as follows:

[0063] Let the atomization amount per unit time of the nth round of atomization be Qn;

[0064] Qn=N•qmax•ηsha•ηratn•ηtimen;

[0065] wherein N is the number of ultrasonic atomizers;

[0066] qmax is the rated atomization amount of a single ultrasonic atomizer per unit time;

[0067] ηsha is the atomization container shape efficiency factor, which is related to the shape of the atomization container. The longer and thinner the atomization container is, the farther the wave needs to travel, and the worse the atomization effect is, and the smaller the ηsha value is;

[0068] N, qmax and ηsha are fixed values in the calculation of the first to third rounds of atomization;

[0069] ηratn is the solid-liquid ratio efficiency factor in the nth round of atomization, which is related to the mass ratio of solids and liquids in the wastewater. The more the solid content in the wastewater, the smaller the atomization effect is, and the smaller the ηratn value is;

[0070] ηtimen is the time decay factor in the nth round of atomization, which is related to the cumulative time of atomization. The longer the cumulative time of atomization is, the more atomization droplets the atomization container contains, and the lower the atomization speed of the ultrasonic atomizer needs to be, and the smaller the ηtimen value is.

[0071] The specific values of ηsha, ηratn and ηtimen can be set by artificial or calculated by the following formula:

[0072] The specific algorithm of the atomization container shape efficiency factor ηsha is:

[0073] ηsha = exp[-0.5•(L / W-Ropt) 2 / σ 2 ];

[0074] exp() represents the function with e as the base and the content in the parentheses as the power, for example, exp(2) is e 2 ;

[0075] L is the length of the bottom of the atomization container;

[0076] W is the width of the bottom of the atomization container;

[0077] Ropt is the set optimal length-width ratio, usually 1.8, which can be changed in value;

[0078] σ is the shape sensitivity, which is related to the shape of the bottom of the atomization container. It is 0.3 for a rectangular bottom and 0.65 for a circular bottom.

[0079] The physical meaning is that the vibration of the ultrasonic wave has an optimal propagation shape with an aspect ratio of Ropt, in which the vibration is most uniform in the atomization container, and thus the atomization effect is worse and the value of ηsha is smaller as the actual atomization container aspect ratio L / W deviates from the optimal aspect ratio Ropt.

[0080] The specific algorithm of the solid-liquid ratio efficiency factor ηratn of the nth round is:

[0081] Let ω0 be the proportion of the liquid mass in the wastewater before atomization;

[0082] Calculate the cumulative atomization amount of the first to the (n-1)th rounds as ΣMln;

[0083] The liquid mass proportion ωn of the nth round is (Mall•ω0-ΣMln) / (Mall-ΣMln);

[0084] The solid-liquid ratio efficiency factor ηratn of the nth round atomization is ωn / (ωn+μ•(1-ωn));

[0085] Wherein, μ is a set solid obstacle coefficient, which is set to 0.5 by default and can be adjusted in size.

[0086] The physical meaning is that as the atomization proceeds, the liquid mass in the wastewater becomes Mall•ω0-ΣMln, the total mass of the wastewater becomes Mall-ΣMln, the liquid mass proportion in the wastewater changes from ω0 to ωn, and the solid mass proportion is 1-ωn. The more solid particles there are, the more ultrasonic wave energy they will absorb, and the liquid will obtain relatively less ultrasonic wave energy, resulting in a decrease in atomization effect, i.e., a smaller value of ηratn.

[0087] The specific calculation of each round is as follows:

[0088] In the first round of atomization, atomization has not yet begun, so ΣMl1=0;

[0089] The liquid mass proportion ω1 of the first round of atomization is (Mall•ω0-ΣMl1) / (Mall-ΣMl1)=ω0;

[0090] The solid-liquid ratio efficiency factor ηrat1 of the first round of atomization is ω1 / (ω1+μ•(1-ω1)).

[0091] In the second round of atomization, the first round of atomization has been completed, so ΣMl2=Q1•0.6•T1;

[0092] The liquid mass proportion ω2 of the second round of atomization is (Mall•ω0-ΣMl2) / (Mall-ΣMl2);

[0093] The solid-liquid ratio efficiency factor ηrat2 of the second round of atomization is ω2 / (ω2+μ•(1-ω2)).

[0094] In the third round of atomization, the first round of atomization and the second round of atomization have been passed, so ΣMl3=Q1•0.6•T1+Q2•0.7•T2;

[0095] The liquid mass proportion ω3 of the third round of atomization is (Mall•ω0-ΣMl3) / (Mall-ΣMl3).

[0096] The solid-liquid ratio efficiency factor ηrat3 of the third round of atomization is ω3 / (ω3+μ•(1-ω3)).

[0097] The specific algorithm of the time decay factor ηtimen is:

[0098] The actual duration of the first round to the n-1th round is calculated as ΣTexn;

[0099] The time decay factor ηtimen of the nth round of atomization is 1-α(ΣTexn / (ΣTexn+Tn)) β .

[0100] Wherein, α is the set decay amplitude coefficient, the default is 0.2, the numerical size can be adjusted;

[0101] β is the set numerical case curve index, the default is 1.5, the numerical size can be adjusted.

[0102] The specific calculation of each round is as follows:

[0103] In the first round of atomization, the atomization has not started, ΣTex1=0; The time decay factor ηtime1 of the first round of atomization is 1-α(ΣTex1 / (ΣTex1+T1)) β =1.

[0104] In the second round of atomization, the first round of atomization has been passed, so ΣTex2=0.6•T1; The time decay factor ηtime2 of the second round of atomization is 1-α(ΣTex2 / (ΣTex2+T2)) β .

[0105] In the third round of atomization, the first round of atomization and the second round of atomization have been passed, so ΣTex3=0.6•T1+0.7•T2; The time decay factor ηtime3 of the third round of atomization is 1-α(ΣTex3 / (ΣTex3+T3)) β .

[0106] The numerical values of the intensity coefficient k2 and the intensity coefficient k3 can be set by artificial or calculated by the following formula:

[0107] The specific algorithm of the intensity coefficient k2 of the second round of atomization is:

[0108] k2 = 0.8 • ((Ml1 / Q1) / (Ml1 / Q2)) 2 .

[0109] The physical meaning is that Ml1 / Q1 is the theoretical atomization time of the first round, and Ml1 / Q2 is the time required for complete atomization of the initial liquid volume according to the current efficiency, so (Ml1 / Q1) / (Ml1 / Q2) reflects the comparison of the atomization efficiency of the second round and the first round, and then the amplitude intensity of the ultrasonic atomizer is adjusted according to the comparison. 0.8 is a limiting coefficient, which forces the amplitude intensity of the second round to be no more than 80% of the first round.

[0110] The specific algorithm of the intensity coefficient k3 of the third round of atomization is:

[0111] k3 = 0.5 • (Ml3 / Ml1) • ((T1+T2) / T3) 0.5 .

[0112] The physical meaning is that Ml3 / Ml1 is the ratio of the remaining liquid volume to the initial liquid volume, and the less the final liquid, the lower the value of k3; T1+T2 is the cumulative atomization time after the start of the atomization operation; if the historical time consumption is long and the current estimate is short ((T1+T2) / T3 > 1), then the amplitude intensity needs to be reduced to prevent the atomization volume from being too large at this time, and the power of 0.5 will reduce the value of (T1+T2) / T3; if the historical time consumption is short and the current estimate is long ((T1+T2) / T3 < 1), then the intensity can be slightly increased, and the power of 0.5 will slightly amplify the value of (T1+T2) / T3.

[0113] Preferably, during the atomization operation, the ultrasonic vibration may cause a temperature rise, and the temperature of the wastewater needs to be monitored, and the ultrasonic atomizer is stopped when the temperature exceeds the set threshold value until the wastewater temperature is below the set value, to prevent the temperature from being too high during the atomization process.

[0114] Preferably, during the switching of adjacent two rounds of atomization, the ultrasonic atomizer stops working for a set time (such as 10S) and then works again, and the pause can make the phase difference of the two rows of atomizers zero, so that a stable destructive interference field can be reconstructed when restarting.

[0115] An ultrasonic atomization device for wastewater evaporation and concentration is used to implement the ultrasonic atomization method for wastewater evaporation and concentration as shown in Figure 2 , comprising:

[0116] The atomization container 1 is provided with a water inlet on the side, which can be a hole or a groove, can be directly connected with the RO system, and is used for inputting waste water into the atomization container 1; the top of the atomization container 1 is an opening; the side wall of the atomization container 1 is preferably made of glass, so that the user can directly observe the atomization state;

[0117] A plurality of ultrasonic atomizers 2 are arranged at the length direction center of the bottom of the atomization container 1 and are distributed into two rows at the bottom of the atomization container 1, each row is parallel to the width direction of the atomization container 1, and the ultrasonic atomizers 2 in the two rows are arranged staggeredly;

[0118] A filter 3 is arranged in the atomization container 1 and is used for intercepting solid particles;

[0119] A collection cover 4 is arranged at the top of the atomization container 1; the collection cover 4 is gradually folded from bottom to top, and a fan is arranged on the collection cover 4 to extract the evaporated gas;

[0120] A processor is used for controlling the vibration amplitude and vibration time length of the plurality of atomizers.

[0121] The specific working process of the ultrasonic atomization equipment for waste water evaporation and concentration is as follows:

[0122] After the waste water is poured into the atomization container 1 through the water inlet, the processor controls the plurality of ultrasonic atomizers 2 to perform three rounds of atomization, the liquid in the waste water is atomized and rises, the solid particles raised together are intercepted by the filter 3, and only the atomized liquid droplets pass through.

[0123] When the equipment is used, an evaporator can be directly arranged in the atomization container 1, the atomized liquid is evaporated into water vapor through the evaporator, and then the collection cover 4 guides the water vapor into the collection pipe to be discharged out of the atomization container 1. Of course, in some special occasions, an evaporator can be arranged outside, and at this time, the collection cover 4 guides the atomized liquid droplets into the collection pipe to be discharged into the evaporator arranged outside.

[0124] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic atomization method for wastewater evaporation and concentration, characterized in that the steps include... include: Multiple ultrasonic atomizers are installed at the bottom of the atomizing container; Pour the wastewater into the atomizing container, obtain the total wastewater volume Mall, and then calculate the liquid volume Ml1 that needs to be atomized. Calculate the atomization volume Q1 per unit time in the first round of atomization, and then calculate the theoretical atomization time T1 for the first round of atomization based on the required liquid volume Ml1; in the first round of atomization, the atomization working time is taken as 0.6·T1; After the ultrasonic atomizer operates at its rated amplitude Imax for 0.6·T1 time, calculate the atomization volume Q2 per unit time for the second round of atomization. Then, based on the remaining liquid volume to be atomized, Ml2 = Ml1 - Q1·0.6·T1, calculate the theoretical atomization time T2 for the second round of atomization. In the second round of atomization, the atomization working time is taken as 0.7·T2. Calculate the intensity coefficient k2 for the second round of atomization: k2 = 0.8·((Ml1 / Q1) / (Ml1 / Q2)). 2 ; After the ultrasonic atomizer operates at an amplitude of k2·Imax for 0.7·T2 hours, calculate the atomization volume Q3 per unit time for the third round of atomization. Then, based on the remaining liquid volume to be atomized, Ml3 = Ml1 - Q1·0.6·T1 - Q2·0.7·T2, calculate the theoretical atomization time T3 for the third round. Calculate the intensity coefficient k3 for the third round of atomization: k3 = 0.5·(Ml3 / Ml1)·((T1+T2) / T3). 0.5 ; The ultrasonic atomizer is run for a duration of T3 with an amplitude of k3·Imax to complete the atomization operation.

2. The ultrasonic atomization method for wastewater evaporation and concentration according to claim 1, characterized in that, The calculation method for the amount of atomization per unit time is as follows: Let Qn be the amount of atomization per unit time in the nth round of atomization; Qn=N·qmax·ηsha·ηratn·ηtimen; Where N is the number of ultrasonic atomizers; qmax is the rated atomization amount of a single ultrasonic atomizer per unit time. ηsha is the atomizer container shape efficiency factor, and its value is related to the shape of the atomizer container; ηratn is the solid-liquid ratio efficiency factor during the nth round of atomization, which is related to the ratio of solids to liquids in the wastewater; ηtimen is the time decay factor during the nth round of atomization, which is related to the cumulative duration of atomization.

3. The ultrasonic atomization method for wastewater evaporation and concentration according to claim 2, characterized in that, The specific algorithm for the atomizing container shape efficiency factor ηsha is as follows: ηsha=exp[-0.5·(L / W-Ropt) 2 / σ 2 ]; Where L is the length of the bottom of the atomizing container; W is the width of the bottom of the atomizing container; Ropt is the set optimal aspect ratio; σ represents shape sensitivity, which is related to the shape of the bottom of the atomizing container.

4. The ultrasonic atomization method for wastewater evaporation and concentration according to claim 2, characterized in that, The specific algorithm for the solid-liquid ratio efficiency factor ηratn is as follows: Let ω0 be the liquid percentage before atomization; The cumulative atomization amount from round 1 to round (n-1) is calculated as ΣMln; The liquid proportion in the nth round is ωn = (Mall·ω0 - ΣMln) / (Mall - ΣMln); ηratn=ωn / (ωn+μ·(1-ωn)); Where μ is the set solid resistance coefficient.

5. The ultrasonic atomization method for wastewater evaporation and concentration according to claim 2, characterized in that, The specific algorithm for the time decay factor ηtimen is as follows: The actual duration from round 1 to round (n-1) is calculated as ΣTexn; ηtimen=1-α(ΣTexn / (ΣTexn+Tn)) β ; Where α is the set attenuation amplitude coefficient; β is the set number of cases curve index.

6. The ultrasonic atomization method for wastewater evaporation and concentration according to claim 1, characterized in that, The temperature of the wastewater is monitored in real time. When the temperature exceeds the set threshold, the operation of the ultrasonic atomizer is stopped until the wastewater temperature is lower than the set value.

7. The ultrasonic atomization method for wastewater evaporation and concentration according to claim 1, characterized in that, During the transition between two adjacent atomization cycles, the ultrasonic atomizer pauses for a set time before resuming operation.

8. An ultrasonic atomizing device for wastewater evaporation and concentration, characterized in that, An ultrasonic atomization method for wastewater evaporation and concentration as described in any one of claims 1 to 7, comprising: The atomizing container has a water inlet on the side and an opening at the top. Multiple ultrasonic atomizers are located at the center of the length direction at the bottom of the atomizing container and are distributed in two rows at the bottom of the atomizing container. Each row is parallel to the width direction of the atomizing container, and the ultrasonic atomizers in the two rows are staggered. A filter is installed inside the atomizing container; A collection hood is installed on top of the atomizing container; a collection tube connected to the outside is installed on the collection hood; The processor is used to control the vibration amplitude and duration of multiple atomizers.

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