Granulating dryer with cleaning function

Abstract

The utility model discloses a granulating dryer with cleaning function, the dryer includes dryer body, and the cleaning assembly and automation control system who communicates with dryer body, the cleaning assembly includes biological enzyme preparation jar body group and the main pipeline who communicates with biological enzyme preparation jar body group, the dryer body includes the trapping chamber, the granulating chamber, the base, and it is connected with the main pipeline through corresponding branch pipeline respectively, and the corresponding rotary shower head is installed to each branch pipeline end, and the regulating valve is installed in each branch pipeline, biological enzyme preparation jar body group includes the parallel connection of complex enzyme premix jar body, catalase jar body, alkaline protease jar body and reverse osmosis water jar body, and it is connected with the main pipeline through corresponding switch valve respectively, and complex enzyme premix jar body is equipped with complex enzyme feeding hole, glucose feeding hole and stirring structure, all switch valves, regulating valve are still connected with automation control system electric signal respectively, the utility model aims at improving the cleaning effect of dryer.

Description

Technical Field

[0001] This utility model relates to the field of equipment cleaning technology, and in particular to a granulation dryer with cleaning function. Background Technology

[0002] Currently, granulation dryers are widely used in the pharmaceutical and food industries. Their complex internal structure makes them prone to retaining contaminants such as sugars, oils, and proteins. Traditional cleaning methods rely on manual operation and use single alkaline proteases or chemical agents. Existing liquid enzyme mixtures often contain proteases, but these proteases decompose other biological enzymes (such as lipases and amylases), leading to the inactivation of the complex enzyme cleaning system and low cleaning efficiency. Current enzyme cleaning methods can only decompose organic matter and cannot kill bacteria, spores, and other microorganisms, easily resulting in excessive total bacterial counts in the product and a lack of sterilization function. Furthermore, the internal piping of granulation dryers is convoluted, and the nozzles are densely distributed. Traditional low-pressure, fixed-angle nozzles cannot cover dead corners such as the collection chamber and base, leaving cleaning blind spots. The cleaning process requires manual reagent preparation, pipeline switching, and time monitoring, which is time-consuming, prone to oversights, and results in poor cleaning consistency, making it highly dependent on manual operation.

[0003] A utility model patent with publication number CN104165505A discloses a multi-functional dryer system and its working method. This system achieves disinfection and sterilization by using a cleaning ball suitable for 360-degree rotation on the top of the dryer for spraying soft water, organic solvents, or cleaning solutions, and a nozzle for spraying high-temperature steam or sterilizing solutions. Although it can rotate 360 ​​degrees for cleaning, the cleaning ball and nozzle are located on the top of the dryer, making it difficult to effectively clean the low-lying areas at the bottom or side walls. In particular, the cleaning effect is insufficient for areas where materials easily accumulate and at the bottom. In addition, the complex internal structure of the dryer can easily trap dirt, creating blind spots for cleaning, requiring manual cleaning and increasing maintenance difficulty. Furthermore, when using high-temperature steam sterilization, if the equipment is not properly sealed or operated improperly, it may cause safety hazards. Frequent high-temperature operation may also accelerate the aging of equipment materials and increase maintenance costs. Utility Model Content

[0004] The main purpose of this invention is to provide a granulation dryer with a cleaning function, aiming to solve the technical problem of poor cleaning effect in dryers.

[0005] To achieve the above objectives, this utility model provides a granulation dryer with a cleaning function, the dryer including a dryer body, a cleaning component connected to the dryer body, and an automatic control system;

[0006] The cleaning assembly includes a biological enzyme preparation tank assembly and a main pipeline connected to the biological enzyme preparation tank assembly.

[0007] The dryer body includes a collection chamber, a granulation chamber, and a base distributed from top to bottom. The collection chamber, granulation chamber, and base are respectively connected to the main pipeline through corresponding branch pipelines. Each branch pipeline is equipped with a corresponding rotating nozzle and a regulating valve.

[0008] The biological enzyme preparation tank group includes a compound enzyme premix tank, a catalase tank, an alkaline protease tank, and a reverse osmosis water tank connected in parallel. The compound enzyme premix tank, catalase tank, alkaline protease tank, and reverse osmosis water tank are respectively connected to the main pipeline through corresponding switch valves.

[0009] The compound enzyme premixing tank is equipped with a compound enzyme inlet, a glucose inlet, and a stirring structure. The compound enzyme inlet is used to add a compound enzyme containing glucose oxidase into the compound enzyme premixing tank, and the glucose inlet is used to add glucose into the compound enzyme premixing tank. The stirring structure is used to ensure that the compound enzyme containing glucose oxidase added into the compound enzyme premixing tank is in full contact with the glucose.

[0010] All on / off valves and regulating valves are also connected to the automatic control system via electrical signals. The automatic control system is used to control the opening and closing operations of the corresponding on / off valves and regulating valves sequentially according to preset time nodes.

[0011] Optionally, the automated control system includes a PLC controller, which is equipped with a timing module and a sequence control module. The timing module and the sequence control module are respectively connected to the electrical signals of each switch valve, and are used to trigger the opening and closing operations of each tank in sequence according to preset time nodes.

[0012] Optionally, the rotation angle of each rotary nozzle is 120-360°, and the angle between the nozzle axis and the surface being cleaned is adjustable.

[0013] Optionally, a variable frequency booster pump is installed in series in the main pipeline to adjust the spray pressure of the rotating nozzle.

[0014] Optionally, the compound enzyme premixing tank is connected to the main pipeline through a first switch valve, and the compound enzyme premixing tank is also equipped with a stirring device, which includes motor-driven paddles for real-time mixing of glucose oxidase and glucose.

[0015] Optionally, the catalase tank, alkaline protease tank, and reverse osmosis water tank are also connected to the main pipeline through corresponding second, third, and fourth switching valves, respectively. The first, second, third, and fourth switching valves are all pneumatic diaphragm valves, and their opening and closing states are controlled by an automated control system.

[0016] Optionally, the collection chamber, granulation chamber, and base are connected to the main pipeline through a first branch pipe, a second branch pipe, and a third branch pipe, respectively. Each branch pipe is equipped with a first regulating valve, a second regulating valve, and a third regulating valve in sequence. The first regulating valve, the second regulating valve, and the third regulating valve are all electric regulating valves, and their opening and closing states are independently controlled by the PLC controller through a solenoid valve group according to a preset timing sequence.

[0017] Optionally, the bottom of the dryer body is also provided with a drain outlet.

[0018] Optionally, a heat insulation jacket is added to the outside of the compound enzyme premixing tank to maintain the temperature inside the tank.

[0019] Beneficial effects:

[0020] This utility model discloses a granulation dryer with a cleaning function. By integrating the dryer body with a cleaning component and controlling the cleaning component through an automated control system, the dryer body, the cleaning component (including the bio-enzyme tank group and main pipeline), and the automated control system work together to achieve the following: the compound enzyme premix tank, catalase tank, alkaline protease tank, and reverse osmosis water tank in the bio-enzyme preparation tank respectively clean the collection chamber, granulation chamber, and base. This avoids the decomposition of other enzymes by the protease, and is low in cost. Furthermore, all components are connected to the granulation dryer's PLC system, allowing each tank to be individually set with a spray washing time and automatically cleaned according to requirements, achieving one-button cleaning and realizing intelligent cleaning. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an embodiment of a granulation dryer with a cleaning function according to the present invention.

[0023] Explanation of icon numbers:

[0024] 1. Compound enzyme premixing tank; 2. Catalase tank; 3. Alkaline protease tank; 4. Reverse osmosis water tank; 5. Main pipeline; 6. First branch pipeline; 7. Second branch pipeline; 8. Third branch pipeline; 101. First switch valve; 201. Second switch valve; 301. Third switch valve; 401. Fourth switch valve; 501. Booster pump; 601. First regulating valve; 701. Second regulating valve; 801. Third regulating valve; a. Base; c. Collection chamber; b. Granulation chamber

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] See Figure 1This utility model provides a structural schematic diagram of a granulation dryer with a cleaning function. The dryer includes a dryer body, a cleaning component connected to the dryer body, and an automatic control system. The cleaning component includes a biological enzyme preparation tank group and a main pipeline 5 connected to the biological enzyme preparation tank group. The dryer body includes a collection chamber c, a granulation chamber b, and a base a distributed from top to bottom. The collection chamber c, granulation chamber b, and base a are respectively connected to the main pipeline 5 through corresponding branch pipelines. Each branch pipeline has a corresponding rotating nozzle installed at its end and a regulating valve installed in each branch pipeline.

[0031] The biological enzyme preparation tank group includes a compound enzyme premix tank 1, a catalase tank 2, an alkaline protease tank 3, and a reverse osmosis water tank 4 connected in parallel. The compound enzyme premix tank 1, catalase tank 2, alkaline protease tank 3, and reverse osmosis water tank 4 are respectively connected to the main pipeline 5 through corresponding switch valves.

[0032] The premixed compound enzyme tank 1 is equipped with a compound enzyme inlet, a glucose inlet, and a stirring structure. The compound enzyme inlet is used to add a compound enzyme containing glucose oxidase to the premixed compound enzyme tank 1, and the glucose inlet is used to add glucose to the premixed compound enzyme tank 1. The stirring structure is used to ensure that the compound enzyme containing glucose oxidase added separately to the premixed compound enzyme tank 1 comes into full contact with the glucose, so that the two react to generate hydrogen peroxide, which can be used for sterilization. In this embodiment, the granulation dryer is a special stainless steel equipment used for long-term continuous industrial enzyme preparation production. Because the equipment has many internal structural components, cleaning is time-consuming, labor-intensive, and incomplete. Its inner wall is severely fouled, with an average scale thickness of 0.2-1 mm. The scale is light yellow in color, and the main fouling components are dextrin, starch, cellulose, fat, protein, and other biological macromolecular foulings commonly used as excipients for biological enzymes. Therefore, the complex enzymes used include liquid amylase, cellulase, lipase, and glucose oxidase, preferably in an activity ratio of (1-2):(1-2):(3-5):1, and the ratio of the total mass of the mixed solution of amylase, cellulase, lipase, and glucose oxidase to the mass of added glucose is (8-10):1.

[0033] All on / off valves and regulating valves are also electrically connected to the automated control system, which sequentially controls the opening and closing of the corresponding on / off valves and regulating valves according to preset time nodes. This achieves synergy between the dryer body, the cleaning components (bio-enzyme tank assembly + main pipeline), and the automated control system. Modular distributed cleaning effectively removes various types of dirt, including protein stains (enzymatic decomposition), organic matter, and inorganic salts (alkali neutralization). Segmented cleaning with alkaline protease (pH 9-10) and glucose oxidase (H2O2 generation) increases the sterilization rate to over 99.9%.

[0034] Furthermore, the compound enzyme premix tank 1, catalase tank 2, alkaline protease tank 3, and reverse osmosis water tank 4 are also equipped with corresponding liquid level sensors. Each liquid level sensor is connected to the electrical signal of the automatic control system to provide real-time feedback on the liquid level inside each tank, so as to further adjust the opening degree of the corresponding switch valve.

[0035] Furthermore, a variable frequency booster pump 501 is installed in series in the main pipeline 5 to adjust the spray pressure of the rotating nozzle to 0.8-1.5 MPa. Preferably, a pressure sensor is also connected in series at the outlet end of the variable frequency booster pump 501 to ensure real-time monitoring of the boosted spray pressure.

[0036] Furthermore, the automated control system includes a PLC controller, which is equipped with a timing module and a sequence control module. The timing module and sequence control module are respectively connected to the electrical signals of each switching valve, and are used to sequentially trigger the opening and closing operations of each tank according to preset time nodes. Preferably, the PLC controller also includes a feedback adjustment module, which is used to receive signals from the liquid level sensor and pressure sensor of each receiving tank in real time, and dynamically adjust the speed of the variable frequency booster pump 501 and the opening degree of the corresponding regulating valve. For example, if the pressure rises suddenly due to nozzle blockage, the pressure sensor 51 detects that the pressure exceeds the maximum value; the PLC triggers an emergency response, that is, controls the variable frequency booster pump 501 to immediately reduce its frequency to the minimum speed, and controls the corresponding regulating valve to open synchronously to 100%, reducing the pressure in the main pipeline by diverting the flow; if the pressure still exceeds the standard, the PLC closes the switching valve and triggers an alarm. Similarly, if the liquid level in the tank is too low, the corresponding liquid level sensor detects that the liquid level is below 20%; the PLC executes protection logic, that is, controls the variable frequency pump 501 to reduce its frequency to the minimum speed required to maintain the pressure, and closes the corresponding switching valve of the tank. PLC timing control and pressure feedback regulation reduce manual intervention and operational errors. Furthermore, frequency conversion speed regulation and valve fine-tuning reduce energy consumption by 30% while minimizing mechanical wear on the equipment caused by high-pressure flushing.

[0037] Furthermore, each rotating nozzle is a multi-degree-of-freedom oscillating nozzle, covering an angle of 120-360°, with a nozzle diameter of 0.5-1.2mm. Preferably, each rotating nozzle is also electrically linked to a PLC controller, meaning the PLC controller indirectly controls the start / stop, speed, or angle of the rotating nozzle by driving the motor and angle adjustment structure of the rotating nozzle through its output module. Additionally, each rotating nozzle is externally fitted with a corrosion-resistant, anti-static, and heat-dissipating outer shell.

[0038] Furthermore, the compound enzyme premixing tank 1 is connected to the main pipeline 5 through the first switch valve 101. The compound enzyme premixing tank 1 is also equipped with a stirring device 102, which includes a motor-driven paddle for real-time mixing of glucose oxidase and glucose.

[0039] The compound enzyme premixing tank 1 is also equipped with a heat insulation jacket to maintain the internal temperature at 25±2℃; preferably, the compound enzyme premixing tank 1 adopts a light-proof shell to ensure the activity of the internal compound enzyme.

[0040] Furthermore, the catalase tank 2, alkaline protease tank 3, and reverse osmosis water tank 4 are respectively connected to the main pipeline 5 through corresponding second switch valve 201, third switch valve 301, and fourth switch valve 401. The first switch valve 101, second switch valve 201, third switch valve 301, and fourth switch valve 401 are all pneumatic diaphragm valves, and their opening and closing states are controlled by a PLC controller.

[0041] Furthermore, the collection chamber, granulation chamber, and base are connected to the main pipeline 5 via a first branch pipe 6, a second branch pipe 7, and a third branch pipe 8, respectively. Each branch pipe is sequentially equipped with a first regulating valve 601, a second regulating valve 701, and a third regulating valve 801. All three valves are electrically operated, and their opening and closing states are independently controlled by a PLC controller via a solenoid valve assembly according to a preset timing sequence. Specifically, the opening degree of the electrically operated regulating valve is dynamically adjusted by the PLC based on the pressure (P) and flow rate (Q) of the main pipeline 5, satisfying the following conditions:

[0042] (k is the pipeline characteristic coefficient).

[0043] Furthermore, the bottom of the dryer body is also provided with drain outlets.

[0044] like Figure 1 The illustrated embodiment of a granulation dryer with a cleaning function includes a dryer body, a cleaning assembly connected to the dryer body, and a PLC controller. The cleaning assembly includes a group of biological enzyme preparation tanks and a main pipeline 5 connected to the group of biological enzyme preparation tanks. The dryer body includes a collection chamber c, a granulation chamber b, and a base a, distributed from top to bottom. The collection chamber c, granulation chamber b, and base a are connected to the main pipeline 5 via a first branch pipeline 6, a second branch pipeline 7, and a third branch pipeline 8, respectively. Each branch pipeline is sequentially equipped with a first regulating valve 601, a second regulating valve 701, and a third regulating valve 801. All three valves are electrically operated, and their opening and closing states are independently controlled by the PLC controller via a solenoid valve group according to a preset timing sequence. Each branch pipeline end is equipped with a corresponding rotating nozzle, which is a multi-degree-of-freedom swing nozzle with a coverage angle of 60° and a nozzle diameter of 0.5 mm. Furthermore, each rotating nozzle is also electrically connected to the PLC controller. That is, the PLC controller drives the motor and angle adjustment structure of the rotating nozzle through the output module, and indirectly controls the start / stop, speed or angle of the rotating nozzle.

[0045] The bio-enzyme preparation tank assembly includes a compound enzyme premix tank 1, a catalase tank 2, an alkaline protease tank 3, and a reverse osmosis water tank 4 connected in parallel. The catalase tank 2, alkaline protease tank 3, and reverse osmosis water tank 4 are also connected to the main pipeline 5 via corresponding second switch valve 201, third switch valve 301, and fourth switch valve 401, respectively. The first switch valve 101, second switch valve 201, third switch valve 301, and fourth switch valve 401 are all pneumatic diaphragm valves, and their opening and closing states are controlled by a PLC controller. A variable frequency booster pump 501 is installed in series on the main pipeline 5 to adjust the spray pressure of the rotating nozzle. The compound enzyme premix tank 1 is equipped with a compound enzyme inlet, a glucose inlet, and a stirring structure. The stirring structure ensures that the compound enzyme containing glucose oxidase, added separately to the compound enzyme premix tank 1, comes into full contact with the glucose, allowing them to react and generate hydrogen peroxide, which can be used for sterilization. All on / off valves and regulating valves are also connected to the automatic control system via electrical signals. The automatic control system is used to control the opening and closing operations of the corresponding on / off valves and regulating valves sequentially according to preset time nodes.

[0046] Furthermore, to better illustrate the structure of this utility model, the following detailed explanation will be provided through specific cleaning methods.

[0047] Step 1: Glucose is added to the compound enzyme premix tank 1 to prepare a mixed solution. This solution is then sprayed into various areas inside the granulator dryer via the main pipeline 5 for the first cleaning. Glucose and glucose oxidase react in situ on the surface of the dirt on the inner wall of the granulator dryer to produce hydrogen peroxide, which disinfects and sterilizes the interior. The concentration of hydrogen peroxide produced in this step is 0.2-0.6%. This step uses a bio-enzymatic method to prepare hydrogen peroxide in situ, ensuring stability at low concentrations and guaranteeing its disinfection and sterilization effect. This solves the problems caused by excessively high concentrations of traditional hydrogen peroxide disinfectant solutions. The stability of hydrogen peroxide is affected by several factors: ① Temperature: Temperature is a crucial factor affecting hydrogen peroxide decomposition. The decomposition rate increases with temperature. At room temperature, the decomposition rate is slow, but at high temperatures, the decomposition reaction proceeds rapidly. ② Light: Light also promotes the decomposition of hydrogen peroxide. Exposure to strong light, such as ultraviolet light, can break the chemical bonds in hydrogen peroxide molecules, thus initiating a decomposition reaction. ③ Catalysts: Certain substances can accelerate the decomposition of hydrogen peroxide. These substances are called catalysts, such as metal ions and enzymes. Under the action of a catalyst, the decomposition rate of hydrogen peroxide will be significantly increased. ④ Pressure: Pressure also has a certain impact on the decomposition of hydrogen peroxide. Under high pressure, the decomposition rate of hydrogen peroxide may decrease. Conversely, under reduced pressure or vacuum conditions, the decomposition of hydrogen peroxide may be accelerated. ⑤ Impurities: Impurities in hydrogen peroxide may also trigger its decomposition. Some impurities can act as catalysts, promoting the decomposition of hydrogen peroxide. Therefore, these factors need to be carefully controlled during storage and use. Furthermore, the low-concentration hydrogen peroxide obtained in the above steps, after sterilization, can also reduce the amount of catalase used subsequently, reducing cleaning costs. Therefore, the bio-enzymatic method for preparing hydrogen peroxide has the advantages of high efficiency, specificity, and safety.

[0048] Step 2: The catalase solution in the catalase tank 2 is sprayed into various areas inside the granulator dryer through the main pipeline 501 to perform a second spraying of the granulator dryer so that the catalase can effectively decompose hydrogen peroxide.

[0049] Step 3: The alkaline protease solution in the alkaline protease tank 3 is sprayed into various areas inside the granulator dryer through the main pipeline 501 to perform the third spray washing of the granulator dryer.

[0050] Step 4: Reverse osmosis water from the reverse osmosis water tank 4 is sprayed into various areas inside the granulator dryer through the main pipeline 501 to perform the fourth spray washing of the granulator dryer.

[0051] Furthermore, in actual use, the spraying process is controlled to last 10 minutes in step 1, and 5 minutes in steps 2-4 respectively, with a 15-minute pause between adjacent steps for soaking reaction. The entire cleaning process is precisely controlled, using less water and electricity, taking less time, and is environmentally friendly.

[0052] Granulation dryers are specialized stainless steel equipment used continuously in the production of industrial enzyme preparations. Due to the numerous internal structural components, cleaning is time-consuming, labor-intensive, and often incomplete. The inner walls are heavily fouled, with an average thickness of 0.2-1 mm. The fouling layer is light yellow and primarily consists of dextrin, starch, cellulose, fats, proteins, and other biomolecules commonly used as excipients in biological enzymes. To address this heavily fouled inner wall, the following examples and comparative embodiments employ a one-button enzymatic automatic descaling and cleaning method.

[0053] Example 1

[0054] Step 1, Ingredient Preparation: First, mix 1200U / ml liquid amylase, 1200U / ml cellulase, 3000U / ml liquid lipase, and 600U / ml glucose oxidase in an activity ratio of 2:2:5:1 to prepare 20kg of mixed product. Clean the No. 1 material cart of the compound enzyme premix tank and add it. Set aside. Add 2kg of glucose before starting the spraying process and dissolve it. Prepare 12kg of liquid catalase with an activity of 8000U / ml. Clean the No. 2 material cart of catalase and add it. Set aside. Prepare 15kg of liquid alkaline protease with an activity of 6000U / ml. Clean the No. 3 material cart of alkaline protease and add it. Set aside. Clean the No. 4 material cart of reverse osmosis water and add 180kg of reverse osmosis water. Set aside.

[0055] Step 2, Parameter Setting: On the PLC control panel of the granulation dryer, set a time of 10 minutes to spray the material of car #1, a pause time of 15 minutes, a time of 5 minutes to spray the material of car #2, a time of 5 minutes to spray the material of car #3, a pause time of 15 minutes, and a time of 5 minutes to spray the material of car #4. All the above times should be set once before cleaning.

[0056] Step 3: When cleaning the granulator dryer is required, access the PLC control panel and click the one-button cleaning button. Various materials, valves, nozzles, booster pumps, etc., will be sprayed in sequence according to the set time: 10 minutes to finish spraying material from cart #1, 15 minutes pause, 5 minutes to finish spraying material from cart #2, 5 minutes to finish spraying material from cart #3, 15 minutes pause, and 5 minutes to finish spraying material from cart #4. This coordinated process cleans the interior of the equipment. The cleaned granulator dryer's internal dirt removal and microbial data will then be monitored.

[0057] Comparative Example 1

[0058] Similar to steps 1 and 2 of Example 1, in step 3, the material from carts 1-3 is simultaneously fed into the granulation dryer via the PLC control panel. The spraying time is controlled to be 10 minutes, followed by a 15-minute pause, and finally, the material from cart 4 is sprayed for the last 5 minutes. The removal of dirt and microbial data inside the granulation dryer after cleaning are then detected.

[0059] Comparative Example 2

[0060] The process is essentially the same as steps 2 and 3 in Example 1, except that catalase is not added to the catalase tank #2 in step 1. After cleaning, the removal of dirt and microbial data inside the granulator dryer are checked.

[0061] Comparative Example 3

[0062] The process is essentially the same as steps 2 and 3 in Example 1, except that in step 1, alkaline protease is not added to the alkaline protease tank #3. After cleaning, the removal of dirt and microbial data inside the granulator dryer are checked.

[0063] For each embodiment and comparative example, the waste liquid from the final reverse osmosis water cleaning step was collected. Referring to the standard "Test Methods for Lactic Acid Bacteria in Imported and Exported Foods" (SN / T 1941.1-2017), viable bacteria in the cleaning waste liquid were isolated and counted using a gradient dilution method. The removal of dirt from the inner wall of the granulator was evaluated by observation. The results of the cleaning and disinfection / sterilization effects of each embodiment and comparative example are shown in Table 1.

[0064] Table 1

[0065] Example 1 The scale has disappeared, and the inner wall has regained the original metallic color of stainless steel. Almost no microorganisms were detected; the number was 0. Comparative Example 1 The scale layer showed no obvious changes, but dirt adhered to the inner wall. The average number of microorganisms was 11899 cfu / ml Comparative Example 2 A small amount of scale is present, and protein dirt adheres to the inner wall. The average number of microorganisms was 186 cfu / ml. Comparative Example 3 A small amount of scale is present, and protein dirt adheres to the inner wall. The average number of microorganisms was 160 cfu / ml.

[0066] As described above, Example 1 uses stepwise cleaning, while in Comparative Example 1, all enzymes are simultaneously added to the granulation dryer under PLC control. The final cleaning effect shows no significant change in the scale layer, with dirt adhering to the inner wall, and an average microbial count of 11899 CFU / ml. This demonstrates that the stepwise cleaning with composite enzymes controlled by PLC in this invention avoids the degradation of other enzymes by proteases, effectively removing dirt from the stainless steel granulator. Furthermore, in Comparative Example 2, without the addition of catalase, some residual hydrogen peroxide in the tank denatures the subsequently added proteases, reducing enzyme activity. This results in incomplete degradation of the adhering substances and enzyme proteins introduced in the previous cleaning steps, leaving a certain amount of microorganisms inside. Finally, in Comparative Example 3, without the addition of alkaline protease, protein dirt cannot be thoroughly cleaned during the cleaning process, leading to dirt adhering to the inner wall, which also ultimately contains a certain amount of microorganisms.

[0067] In the above embodiments, those skilled in the art can use existing technology for software control. This utility model only protects the structure of the granulation dryer with cleaning function and the interconnection relationship between them.

[0068] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A granulation dryer with a cleaning function, characterized in that, The dryer includes a dryer body, a cleaning assembly connected to the dryer body, and an automated control system; The cleaning assembly includes a biological enzyme preparation tank group and a main pipeline (5) connected to the biological enzyme preparation tank group. The dryer body includes a collection chamber (c), a granulation chamber (b), and a base (a) distributed from top to bottom. The collection chamber (c), the granulation chamber (b), and the base (a) are respectively connected to the main pipeline (5) through corresponding branch pipelines. Each branch pipeline is equipped with a corresponding rotating nozzle and a regulating valve is installed in each branch pipeline. The biological enzyme preparation tank group includes a compound enzyme premix tank (1), a catalase tank (2), an alkaline protease tank (3), and a reverse osmosis water tank (4) connected in parallel. The compound enzyme premix tank (1), the catalase tank (2), the alkaline protease tank (3), and the reverse osmosis water tank (4) are respectively connected to the main pipeline (5) through corresponding switch valves. The compound enzyme premix tank (1) is provided with a compound enzyme feeding port, a glucose feeding port and a stirring structure. The compound enzyme feeding port is used to add a compound enzyme containing glucose oxidase to the compound enzyme premix tank (1), and the glucose feeding port is used to add glucose to the compound enzyme premix tank (1). The stirring structure is used to ensure that the compound enzyme containing glucose oxidase added separately to the compound enzyme premix tank (1) and the glucose are in full contact. All on / off valves and regulating valves are also connected to the automatic control system via electrical signals. The automatic control system is used to control the opening and closing operations of the corresponding on / off valves and regulating valves sequentially according to preset time nodes.

2. The granulation dryer with cleaning function according to claim 1, characterized in that, The automated control system includes a PLC controller, which is equipped with a timing module and a sequence control module. The timing module and the sequence control module are respectively connected to the electrical signals of each switch valve, and are used to trigger the opening and closing operations of each tank in sequence according to preset time nodes.

3. The granulation dryer with cleaning function according to claim 1, characterized in that, Each rotating nozzle has a rotation angle of 120-360°, and the angle between the nozzle axis and the surface being cleaned is adjustable.

4. The granulation dryer with cleaning function according to claim 3, characterized in that, The main pipeline (5) is equipped with a variable frequency booster pump (501) in series, which is used to adjust the spray pressure a of the rotating nozzle.

5. The granulation dryer with cleaning function according to claim 1, characterized in that, The premixed compound enzyme tank (1) is connected to the main pipeline (5) through the first switch valve (101), and the stirring structure includes a motor-driven paddle for real-time mixing of glucose oxidase and glucose.

6. The granulation dryer with cleaning function according to claim 5, characterized in that, The catalase tank (2), alkaline protease tank (3) and reverse osmosis water tank (4) are also connected to the main pipeline (5) through corresponding second switch valve (201), third switch valve (301) and fourth switch valve (401). The first switch valve (101), second switch valve (201), third switch valve (301) and fourth switch valve (401) are all pneumatic diaphragm valves, and their opening and closing states are controlled by an automated control system.

7. The granulation dryer with cleaning function according to claim 2, characterized in that, The collection chamber (c), granulation chamber (b), and base (a) are connected to the main pipeline (5) through the first branch pipeline (6), the second branch pipeline (7), and the third branch pipeline (8), respectively. Each branch pipeline is equipped with a first regulating valve (601), a second regulating valve (701), and a third regulating valve (801) in sequence. The first regulating valve (601), the second regulating valve (701), and the third regulating valve (801) are all electric regulating valves, and their opening and closing states are independently controlled by the PLC controller through the solenoid valve group according to the preset timing sequence.

8. The granulation dryer with a cleaning function according to any one of claims 1-7, characterized in that, The bottom of the dryer body is also provided with a drain outlet.

9. The granulation dryer with cleaning function according to claim 8, characterized in that, The compound enzyme premix tank (1) is also equipped with an external heat insulation jacket to maintain the temperature inside the tank.

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