CN113336172B - Method for keeping rotating type PET product sealing head sterile - Google Patents
Method for keeping rotating type PET product sealing head sterile Download PDFInfo
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- CN113336172B CN113336172B CN202110529591.1A CN202110529591A CN113336172B CN 113336172 B CN113336172 B CN 113336172B CN 202110529591 A CN202110529591 A CN 202110529591A CN 113336172 B CN113336172 B CN 113336172B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C7/00—Concurrent cleaning, filling, and closing of bottles; Processes or devices for at least two of these operations
- B67C7/0073—Sterilising, aseptic filling and closing
- B67C7/0086—Sterilisation being restricted to the area of application of the closure
Abstract
The invention relates to the technical field of sealing cap cleaning, and discloses a method for keeping the sterility of a sealing cap head of a rotary PET product aiming at the problem that the prior art cannot thoroughly eliminate the sanitary dead angle of the inner wall of the sealing cap head. The invention has the beneficial effects that: on the basis of cleaning and disinfection of a conventional filling machine, a nozzle for washing and disinfecting the sealing head is added, so that microorganisms hidden in the sealing head can be effectively killed in the production process, and the inner wall of the sealing head is kept in a sterile state in the whole process; the method has the advantages that the price of the required reconstruction spare parts and the operation cost are both lower, and the reconstruction cost of the parts does not exceed 400 yuan; the method can ensure that the residual disinfectant in the product meets the standard requirement.
Description
Technical Field
The invention relates to the technical field of seal cap cleaning, in particular to a method for keeping a seal cap head of a rotary PET product sterile.
Background
In the production process of high-nutrition PET bottle beverage, the filling and sealing environment is required to be ensured to be sterile, and the sealing head in the filling and cleaning environment has more cleaning and disinfecting dead corners due to the complex structure, such as the surface of a bottle cap push-out rod in the cap grabbing head and the inner wall of a hollow shaft moving up and down. During production, partial products are not sealed due to the problems of cover clamping, cover falling and the like, in the transfer process of the capping machine, the liquid inside the capping machine splashes to pollute the cap grabbing head, and the microorganism breeding can be caused because the slurry entering the interior of the capping head cannot be timely washed or cannot be thoroughly washed and disinfected. The microorganism quantity range of the hollow shaft in the sealing head is 10 after the tracking monitoring in the continuous production process 2 -10 4 CFU/tube, the above dead corners easily contaminate the hundred-level ring of the capping areaAnd further contaminate the pre-lidded product.
In the process of the prior ultra-clean hot-filling and sterile cold-filling content sensitive PET products, COP alkaline acid pickling and SOP peracetic acid (PAA) disinfection are carried out before starting up, short-time SOP disinfection is also carried out regularly in the production process, and the aim of partially eliminating internal sanitary dead corners is fulfilled by optimizing a cover sealing head structure of a partial filling machine; for a common hot filling machine, because no automatic cleaning and disinfecting equipment is provided, the sanitary dead angle inside the sealing head is more serious, and the problem can be relieved only by adopting a manual disassembling and washing method. However, the cleaning and disinfection are difficult to permeate into the inner wall of the hollow shaft, the clamping spring and the dead angle position inside the steel ball, which are moved up and down, of the bottle cap pushing rod of the capping head, so that organic matters are accumulated in the area to generate a bacterial film. The longer the production time, the greater the number of microorganisms propagated in the area, and the more likely it is to contaminate the product.
The existing cap head cleaning and sterilizing scheme comprises the following steps:
1. the aim of easier cleaning and disinfection is achieved by optimizing the design structure of the cover sealing system. If the short cover pushing rod is adopted to replace the long cover pushing rod, the length of the hollow shaft for up-and-down movement of the cover pushing rod can be shortened, and meanwhile, the hollow shaft is designed into a hollow structure so as to reduce the cleaning and disinfecting dead angle area; the method has the defects that the whole sealing system needs to be completely replaced by optimizing the mode of eliminating the dead angle of the sealing system, the cost is high, and the sanitary dead angle cannot be completely eliminated.
2. Adopting COP and SOP before starting up and short-time SOP in the production process to flush and sterilize the capping head; the defects that the COP and the SOP of the filling machine are used for washing and disinfecting the sealing head, and the sanitary dead angle of the inner wall of the sealing head cannot be thoroughly eliminated.
3. For the sanitary dead angle in the sealing cover head, a method of manually disassembling, cleaning, disinfecting and then returning is adopted; the defects of time and labor waste, low automation degree and incapability of completely eliminating sanitary dead angles due to the adoption of a manual unpicking and washing mode.
Disclosure of Invention
The invention aims to solve the problem that the prior art can not thoroughly eliminate the sanitary dead angle of the inner wall of the sealing head, and provides a method for keeping the sterility of the sealing head of a rotary PET product.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process.
The invention has the advantages that the characteristics of the sanitary dead angle in the sealing cover head are tracked and analyzed, the disinfection system of the filling machine is utilized, the high disinfection effect is achieved with the lowest cost through simple equipment modification, and the sterility of the dead angle is realized, so that the reduction of the production efficiency and the increase of the production cost caused by frequent COP and SOP cleaning and disinfection and the increase of the equipment cost caused by upgrading and modification of the sealing cover system are avoided.
Preferably, the nozzle is a universal nozzle, and the shape of the sprayed disinfectant is fan-shaped.
Preferably, a nozzle ball is arranged in the universal nozzle, and the unilateral rotation angle limit of the nozzle ball is 22-23 degrees.
Preferably, the included angle A between the spray center line of the nozzle and the intersection point of the center vertical line of the capping head ranges from 10 degrees to 30 degrees, and the distance between the top of the nozzle and the lowest point of the capping head ranges from 2cm to 5cm.
Preferably, the running speed of the capping head on the production line is 24000-36000 bottles/h.
Preferably, the capping head has an internal diameter dimension of 28 or 38mm.
Preferably, the spraying pressure of the sterilizing liquid is 2-4bar, and the flow rate is 33-40L/h.
Preferably, the spraying time is 1-2min every 10-15 min.
Because the sealing head is always in a moving state in the production process, the disinfection nozzle is fixed at a position and is still, and meanwhile, in order to prevent the sealing head from colliding with the nozzle, a certain distance and angle need to be kept between the sealing head and the nozzle, through experimental demonstration, the nozzle with the single-side corner of 22-23 degrees is selected, and the range of an included angle A between the spraying center line of the nozzle and the intersection point of the center vertical line of the sealing head is determined to be 10-30 degrees, and the range of the distance between the top of the nozzle and the lowest point of the sealing head is 2-5cm. Meanwhile, a filling machine with the conventional operation speed of 24000-36000 bottles/h and the inner diameter size of the sealing head of 28 or 38mm is taken as a test target, and the injection pressure and the flow rate are tested to be less than 2bar and 33L/h for maintaining the sterility of the sealing head and ensuring that the product residue meets the required parameter range, the impact force is too small to be infiltrated into all dead corners in the sealing head and is more than 4bar and 40L/h, so that the residual disinfectant in the product possibly exceeds the standard. By varying the different rinsing intervals and spray times and tracking the microbiological condition of the capping head, it was found that when the rinsing intervals were > 15min, sterility of the interior of the capping head could not be ensured, while spray times < 10min resulted in increased use costs. The parameters of the invention are not obtained by random setting and changing, but the parameter range determined by numerous tests and determination is obtained, all numerical values are matched with each other, and are a complete whole, and the invention has the defects that any parameter can not be changed randomly, and the scheme obtained by exceeding the parameter range of the invention not only consumes cost, but also greatly reduces the sterilization effect.
Preferably, when the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with the concentration of 1000-2500ppm and the temperature of 30-50 ℃. The concentration and temperature parameters of the disinfection solution can ensure that the sterilization intensity of the packing material (bottle or bottle cap) reaches 5 logs, so as long as the disinfection solution meeting the condition range can be sprayed on the microorganisms remained in the capping head at the pressure and the flow rate defined by the invention, the microorganisms can be killed and washed cleanly. The used disinfectant is taken from a bottle cap or a bottle disinfection system, and no additional new disinfectant preparation equipment is needed.
Preferably, when the production line is common hot filling, the sprayed disinfectant is 3-5ppm of sodium hypochlorite at 10-50 ℃. The sterilization cleanliness of common hot filling is not high as that of ultra-clean hot filling, the concentration and the temperature parameters of the disinfectant can ensure that the sterilization intensity of the bottle reaches 2-3 logs, and the disinfectant can play a role in inhibiting or killing microorganisms on the capping head. The used disinfectant is taken from a bottle disinfection system, and no additional new disinfectant preparation equipment is needed.
Therefore, the invention has the following beneficial effects:
(1) On the basis of cleaning and disinfection of a conventional filling machine, a nozzle for washing and disinfecting the sealing head is added, so that microorganisms hidden in the sealing head can be effectively killed in the production process, and the inner wall of the sealing head is kept in a sterile state in the whole process;
(2) The cost and the operating cost of the required reconstruction spare parts are low, the required reconstruction spare parts comprise a stainless steel universal nozzle, an angle valve, a cycle time relay, a 24V electromagnetic valve, a tee joint, a monofilament, a joint and a polytetrafluoroethylene pipe, and the reconstruction cost does not exceed 400 yuan;
(3) Calculated according to 300 days of operation each year, the consumption of materials and energy sources does not exceed 1500 yuan, the disinfectant residue in the product meets the standard requirement (aiming at ultra-clean lines and sterile cold filling lines, the consumption is less than 0.5ppm PAA/200ml pure water/bottle), the sterilization method is efficient, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of a cap with a nozzle spraying a disinfectant solution to sterilize the cap.
FIG. 2 is a view showing the installation position of the washing and sterilizing nozzle on the production line (a: nozzle installation area, b: capping head idle area, c: capping head and product separation area, d: capping area, e: capped capping head falling area, f: uncapped product entry area, g: capping head falling cap grasping re-rising area, h: product outlet area after capping).
FIG. 3 is a schematic view of the angle between the capping head and the nozzle centerline and the distance therebetween.
Fig. 4 is a capping head internal construction.
Fig. 5 is an internal structure view of the nozzle and the nozzle ball.
In the figure: 1. a capping head; 2. a nozzle; 3. a nozzle ball.
Detailed Description
The invention is further described below with reference to specific embodiments.
General examples
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle 2 for washing and disinfecting the sealing head is additionally arranged around the sealing head 1 on a production line, disinfectant is sprayed in the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the inside of the universal nozzle is provided with a nozzle ball 3, and the limit of the single-side rotation angle of the nozzle ball is 22-23 degrees. The included angle A between the spraying central line of the nozzle and the intersection point of the central vertical line of the sealing cover head ranges from 10 degrees to 30 degrees, and the distance between the top of the nozzle and the lowest point of the sealing cover head ranges from 2cm to 5cm. The running speed of the sealing cover head on the production line is 24000-36000 bottles/h; the inner diameter of the capping head is 28 or 38mm; the pressure of disinfectant injection is 2-4bar, and the flow rate is 33-40L/h; the spraying time is 1-2min every 10-15 min.
When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with the temperature of 30-50 ℃ and the concentration of 1000-2500 ppm; when the production line is common hot filling, the sprayed disinfectant is 3-5ppm of sodium hypochlorite at 10-50 ℃.
Example 1
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the inside of the universal nozzle is provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle of the intersection point of the spray central line of the nozzle and the central vertical line of the sealing cover head is 20 degrees, and the distance between the top of the nozzle and the lowest point of the sealing cover head is 2-5cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the spraying pressure of the disinfectant is 3bar, and the flow rate is 36L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with 1800ppm and 40 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Example 2
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 23 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 10 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 2cm. The running speed of the capping head on the production line is 36000 bottles/h; the inner diameter of the sealing head is 28mm; the pressure of disinfectant injection is 2bar, and the flow rate is 40L/h; the spraying time is 1min every 10 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with 1000ppm and 30 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Example 3
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 30 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 5cm. The running speed of the capping head on the production line is 36000 bottles/h; the inner diameter of the sealing head is 38mm; the spraying pressure of the disinfectant is 4bar, and the flow rate is 40L/h; the spraying time is 2min every 15 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peracetic acid solution with 2500ppm and 50 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Example 4
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 15 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 3cm. The running speed of the capping head on the production line is 28000 bottles/h; the inner diameter of the sealing head is 38mm; the spraying pressure of the disinfectant is 3bar, and the flow rate is 35L/h; the spraying time is 1.5min every 12 min. When the production line is common hot filling, the sprayed disinfectant is 4ppm sodium hypochlorite at 25 ℃. For ordinary hot filling, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Example 5
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 23 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 10 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 5cm. The running speed of the capping head on the production line is 24000 bottles/h; the inner diameter of the sealing head is 28mm; the spraying pressure of the disinfectant is 4bar, and the flow rate is 33L/h; the spraying time is 1min every 15 min. When the production line is common hot filling, the sprayed disinfectant is 5ppm sodium hypochlorite at 10 ℃. For common hot filling, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline and is additionally provided with a circulating time relay, an electromagnetic valve and a pneumatic angle valve.
Comparative example 1 (differing from example 1 in that the nozzle had a spray centerline intersecting the vertical line centered on the closure head at an angle in the range of 5 deg.)
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the inside of the universal nozzle is provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle range of the intersection point of the spray central line of the nozzle and the central vertical line of the sealing cover head is 5 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 2-5cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the pressure of disinfectant injection is 3bar, and the flow is 36L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with 1800ppm and 40 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Comparative example 2 (different from example 1 in that the distance between the top of the nozzle and the lowest point of the capping head is in the range of 1 cm.) a method for keeping the sterility of the capping head of the rotary PET product is provided, wherein a nozzle for washing and disinfecting the capping head is additionally arranged around the capping head on a production line, disinfectant is sprayed in the nozzle to kill microorganisms hidden in the capping head, and the sterility of the inner wall of the capping head is maintained all the way. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the inside of the universal nozzle is provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 20 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 1cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the pressure of disinfectant injection is 3bar, and the flow is 36L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with 1800ppm and 40 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Comparative example 3 (different from example 1 in that the pressure of the disinfectant liquid spray was 6 bar.)
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 20 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 2-5cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the pressure of disinfectant injection is 6bar, and the flow rate is 36L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with the concentration of 1800ppm and the temperature of 40 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Comparative example 4 (different from example 1 in that the flow rate of the disinfectant was 45L/h.)
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle of the intersection point of the spray central line of the nozzle and the central vertical line of the sealing cover head is 20 degrees, and the distance between the top of the nozzle and the lowest point of the sealing cover head is 2-5cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the spraying pressure of the disinfectant is 3bar, and the flow rate is 45L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with 1800ppm and 40 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Comparative example 5 (different from example 1 in that the temperature of the disinfecting solution was 55 ℃)
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 20 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 2-5cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the spraying pressure of the disinfectant is 3bar, and the flow rate is 36L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with the concentration of 1800ppm and the temperature of 55 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
Comparative example 6 (different from example 1 in that the disinfectant was 75% alcohol.)
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the inside of the universal nozzle is provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle of the intersection point of the spray central line of the nozzle and the central vertical line of the sealing cover head is 20 degrees, and the distance between the top of the nozzle and the lowest point of the sealing cover head is 2-5cm. The running speed of the capping head on the production line is 30000 bottles/h; the inner diameter of the sealing head is 28mm; the pressure of disinfectant injection is 3bar, and the flow is 36L/h; the spraying time is 1.5min every 13 min. When the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is 75% alcohol with the temperature of 40 ℃. For an ultra-clean line or an aseptic cold filling line, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline, and a circulating time relay, an electromagnetic valve and a pneumatic angle valve are additionally arranged.
The disadvantages of this solution include: the need to add storage tanks; alcohol is volatile, has low flash point and is easy to cause explosion; the raw material cost is higher than that of PAA; the disinfection effect is not as good as that of PAA.
Comparative example 7 (different from example 4 in that the disinfectant solution was changed to 2000ppm hydrogen peroxide.)
A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle for washing and disinfecting the sealing head is additionally arranged around the sealing head on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process. The spray nozzle is a universal spray nozzle, and the shape of the sprayed disinfectant is fan-shaped; the universal nozzle is internally provided with a nozzle ball, and the single-side rotation angle limit of the nozzle ball is 22.5 degrees. The included angle range of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head is 15 degrees, and the distance range of the top of the nozzle and the lowest point of the sealing cover head is 3cm. The running speed of the capping head on the production line is 28000 bottles/h; the inner diameter of the sealing head is 38mm; the pressure of disinfectant injection is 3bar, and the flow is 35L/h; the spraying time is 1.5min every 12 min. When the production line is common hot filling, the sprayed disinfectant is 4ppm and 2000ppm hydrogen peroxide at 25 ℃. For common hot filling, a branch is led out from a bottle cap disinfection PAA solution circulating pipeline and is additionally provided with a circulating time relay, an electromagnetic valve and a pneumatic angle valve.
The disadvantages of this solution include: a new allocation storage system is required to be added; the hydrogen peroxide is a byproduct after the decomposition of the peracetic acid, so that the sterilizing effect of the hydrogen peroxide is obviously lower than that of PAA (poly (acrylic acid)) under the same concentration; the disinfection effect is not as good as that of PAA.
Table 1 items and performance evaluation parameters of the resulting beneficial effects
And (4) conclusion: it can be seen from examples 1-5 that only within the parameters of the present invention, a better disinfection effect can be achieved at the lowest cost, ensuring that all microorganisms hidden inside the capping head are killed, eliminating the hidden dead angles of the microorganisms, and ensuring that the capping head is in an aseptic state during the whole production process.
Comparative example 1 differs from example 1 in that the spray centre line of the nozzle has an angle in the range of 5 ° to the intersection of the vertical line of the centre of the capping head; too small an angle may result in the nozzle colliding with the closure head and the crescent, which is not feasible.
The difference between the comparative example 2 and the example 1 is that the distance between the top of the nozzle and the lowest point of the capping head is 1cm, and the distance between the universal nozzle and the capping head is closer; the difference between the comparative example 3 and the example 1 is that the spraying pressure of the disinfectant is 6bar, and the problem that the residual disinfectant of the product exceeds the standard exists; the difference between the comparative example 4 and the example 1 is that the flow of the disinfectant is 45L/h, and the problem of overproof residual disinfectant of the product exists; comparative example 5 differs from example 1 in that the temperature of the disinfecting liquid is 55 ℃; comparative example 6 differs from example 1 in that the disinfecting solution is 75% alcohol; the difference between the comparative example 7 and the example 4 is that the disinfectant is changed into 2000ppm (36%) hydrogen peroxide. ) It can be known from comparative examples 2 to 7 that changing the key disinfection parameters weakens the sterilization effect of the disinfection water sprayed by the nozzle, increases the bacterial content, or causes the problem that the disinfection solution residue of the product exceeds the standard, and causes the waste of energy and resources due to overhigh total operation cost.
In fig. 2, the nozzle is shown installed 3-4 stations before the capping head releases the product and the capping head grips the cap, so that the cap does not contaminate the sterilizing liquid and the inner wall of the capping head can be thoroughly sterilized.
From the data relating to examples 1-5 and comparative examples 1-7 above, it is clear that the above requirements can be met in all respects only by a solution within the scope of the claims of the present invention, resulting in an optimized solution and an optimized method for maintaining the sterility of the capping heads of the rotary-filled PET products. And the change of the flow, the replacement/addition/subtraction of parts or the change of the feeding sequence can bring corresponding negative effects.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (2)
1. A method for keeping the rotating type PET product sealing head sterile is characterized in that a nozzle (2) for washing and disinfecting the sealing head is additionally arranged around the sealing head (1) on a production line, disinfectant is sprayed out of the nozzle to kill microorganisms hidden in the sealing head, and the inner wall of the sealing head is kept sterile in the whole process;
the included angle A of the intersection point of the spraying central line of the nozzle and the central vertical line of the sealing cover head ranges from 10 degrees to 30 degrees, and the distance range h between the top of the nozzle and the lowest point of the sealing cover head ranges from 2cm to 5cm;
the pressure of disinfectant injection is 2-4bar, and the flow rate is 33-40L/h;
a nozzle ball (3) is arranged in the universal nozzle, and the limit of the single-side rotation angle of the nozzle ball is 22-23 degrees; the running speed of the sealing cover head on the production line is 24000-36000 bottles/h; the inner diameter of the capping head is 28 or 38mm; the spraying time is 1-2min every 10-15 min;
when the production line is ultra-clean hot filling or aseptic cold filling, the sprayed disinfectant is a peroxyacetic acid solution with the temperature of 30-50 ℃ and the concentration of 1000-2500 ppm; when the production line is common hot filling, the sprayed disinfectant is 3-5ppm of sodium hypochlorite at 10-50 ℃.
2. The method of claim 1, wherein the nozzle is a universal nozzle and the spray of sterilizing fluid is fan-shaped.
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Citations (5)
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|---|---|---|---|---|
| JP2003200910A (en) * | 2001-12-28 | 2003-07-15 | Toyo Seikan Kaisha Ltd | Sterilizing and asepsis-maintaining method in container closing machine, container closing machine capable of being sterilized and maintaining asepsis, method for preventing contamination around spindle in container closing machine, and container closing machine capable of preventing contamination around spindle |
| CN103693597A (en) * | 2013-12-03 | 2014-04-02 | 江苏星A包装机械集团有限公司 | Cover sealing device for sterile filling |
| CN108821225A (en) * | 2018-08-07 | 2018-11-16 | 天津市天盛园调味食品有限公司 | A kind of vinegar filling apparatus |
| CN109863111A (en) * | 2016-10-21 | 2019-06-07 | Arol公司 | For discharging the capping head of lid on container or bottle |
| CN212687525U (en) * | 2020-06-08 | 2021-03-12 | 鑫弘(广州)智能设备有限公司 | Spiral cover device with cleaning and disinfecting functions |
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2021
- 2021-05-14 CN CN202110529591.1A patent/CN113336172B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003200910A (en) * | 2001-12-28 | 2003-07-15 | Toyo Seikan Kaisha Ltd | Sterilizing and asepsis-maintaining method in container closing machine, container closing machine capable of being sterilized and maintaining asepsis, method for preventing contamination around spindle in container closing machine, and container closing machine capable of preventing contamination around spindle |
| CN103693597A (en) * | 2013-12-03 | 2014-04-02 | 江苏星A包装机械集团有限公司 | Cover sealing device for sterile filling |
| CN109863111A (en) * | 2016-10-21 | 2019-06-07 | Arol公司 | For discharging the capping head of lid on container or bottle |
| CN108821225A (en) * | 2018-08-07 | 2018-11-16 | 天津市天盛园调味食品有限公司 | A kind of vinegar filling apparatus |
| CN212687525U (en) * | 2020-06-08 | 2021-03-12 | 鑫弘(广州)智能设备有限公司 | Spiral cover device with cleaning and disinfecting functions |
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