CN219378321U - Sterile tank cleaning device - Google Patents

Abstract

The utility model discloses a cleaning device for an aseptic tank, which comprises a liquid supply pipeline and a return pipeline, wherein the aseptic tank is communicated with a cleaning station through the liquid supply pipeline and the return pipeline to form a cleaning loop, and the cleaning device for the aseptic tank further comprises: the liquid supply pipeline is communicated with the distribution end of the cleaning station through the heating structure; the detection bent pipe is positioned below the return pipeline, two ends of the detection bent pipe are communicated with the return pipeline, the detection bent pipe is provided with an ascending pipe, and cleaning liquid flowing into the detection bent pipe from the return pipeline can fill the ascending pipe from bottom to top and flow back into the return pipeline; and the electric conduction detection structure is arranged on the ascending pipe. According to the utility model, the heating structure is additionally arranged, so that the flushing medium can reach the temperature required by cyclic cleaning rapidly, and the cleaning time is shortened; by additionally arranging the detection bent pipe, the cleaning liquid after gas is separated can enter the ascending pipe, and further, the timing interruption of circulating flushing caused by unstable or inaccurate detection of the conductivity detection structure is avoided.

Description

Sterile tank cleaning device

Technical Field

The utility model relates to the technical field of aseptic tank cleaning, in particular to an aseptic tank cleaning device.

Background

The sterile cans for producing beverages such as beverages, dairy products, milk-containing beverages and the like need to be cleaned after the production is finished, and the cleaning is thorough to improve the cleaning effect, so that the can body is cleaned by starting a cleaning-in-place (CIP, cleaning in place) program immediately after the production is finished. Typically, a complete CIP procedure must be performed after each production cycle. The cleaning mode comprises acid washing, alkali washing and water washing, and the cleaning time lasts for three and a half hours. In order to meet the cleaning effect, the temperature, concentration, flow rate, medium and time of the flushing medium are required to meet the requirements, however, intermediate water flushing is required when the flushing medium is switched in the cleaning process, so that the temperature of a pipeline and the tank body is reduced, the temperature is required to be increased to the temperature required by cleaning when the flushing medium is switched for cleaning, the circulation timing is performed, the flushing medium is required to occupy a longer time after being switched, the cleaning efficiency is lower, and the upstream (ultrahigh temperature) and downstream (filling machine) cleaning time of the sterile tank are within one half hour, so that the production efficiency of the whole production line is greatly influenced by the cleaning of the sterile tank, and the bottleneck problem of production restriction is caused. In addition, because the cleaning fluid is hydraulically returned to the cleaning station by using compressed air during cleaning of the sterile tank, high gas content of the cleaning fluid can occur, so that the detection of reflux conductivity and temperature is fluctuated, the detection is accurate, the program can interrupt the cycle timing, and the cleaning time is prolonged.

Disclosure of Invention

The utility model aims to provide a cleaning device for a sterile tank, which solves the technical problems that the cleaning time is prolonged and the cleaning efficiency is low due to the fact that the time required for the cleaning of the sterile tank to be lifted to the temperature required by cleaning after the flushing medium is switched is long, and the circulation timing is interrupted due to the fluctuation of reflux conductivity caused by the high air content of cleaning liquid.

The above object of the present utility model can be achieved by the following technical solutions:

the utility model provides a cleaning device for an aseptic tank, which comprises a liquid supply pipeline and a return pipeline, wherein the aseptic tank is communicated with a cleaning station through the liquid supply pipeline and the return pipeline to form a cleaning loop, and the cleaning device for the aseptic tank further comprises: the distribution end of the cleaning station is communicated with the liquid supply pipeline through the heating structure; the detection bent pipe is positioned below the return pipeline, two ends of the detection bent pipe are communicated with the return pipeline, the detection bent pipe is provided with an ascending pipe, and cleaning liquid flowing into the detection bent pipe from the return pipeline can fill the ascending pipe from bottom to top and flow back into the return pipeline; and the electric conduction detection structure is arranged on the ascending pipe.

In an embodiment of the present utility model, the ascending pipe extends in a vertical direction.

In an embodiment of the present utility model, the length of the ascending pipe in the vertical direction is not less than 60 cm.

In an embodiment of the utility model, the detection bent pipe is a U-shaped pipe.

In an embodiment of the present utility model, the return line includes a horizontal pipe, and the horizontal pipe extends in a horizontal direction and is located above the detection elbow.

In an embodiment of the utility model, two ends of the horizontal pipe are communicated with two liquid discharge pipes through two reducing pipes, and the diameter of the horizontal pipe is smaller than that of the liquid discharge pipes.

In an embodiment of the utility model, the heat medium input end of the heating structure is communicated with a heat medium input pipeline, and steam condensate recovered from a workshop is used as a heat fluid and is input into the heating structure through the heat medium input pipeline.

In the embodiment of the utility model, a temperature monitoring structure is arranged on the liquid supply pipeline, a regulating valve is arranged on the heat medium input pipeline, and the temperature monitoring structure is in signal connection with the regulating valve.

In an embodiment of the present utility model, the heat medium input pipe is provided with a filtering structure.

In an embodiment of the utility model, the heating structure is a tubular heat exchanger.

In an embodiment of the utility model, the return line is connected to the recovery end of the washing station, and a return pump is mounted on the return line.

The utility model has the characteristics and advantages that:

according to the sterile tank cleaning device, the heating structure is additionally arranged, and the cleaning liquid is heated in an auxiliary manner when the flushing medium is switched, so that the temperature of the acid liquid can reach the temperature required by circulating cleaning rapidly after the flushing medium is switched, and the cleaning time is shortened.

According to the sterile tank cleaning device, the detection bent pipe is additionally arranged, and the conductivity detection structure is arranged on the ascending pipe of the detection bent pipe, so that the cleaning liquid after gas separation can enter the ascending pipe, and the conductivity of the cleaning liquid is stably and accurately measured through the conductivity detection structure, so that the timing interruption of circulating flushing caused by unstable or inaccurate detection of the conductivity detection structure is avoided.

According to the sterile tank cleaning device, the reflux pump is additionally arranged on the reflux pipeline to help the cleaning liquid in the sterile tank to reflux to the cleaning station, so that the whole cleaning period is continuously carried out, and the middle is not required to be interrupted for waiting for the accumulated liquid to descend.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a sterile canister cleaning apparatus of the present utility model.

Fig. 2 is a schematic view of a heating structure in the present utility model.

FIG. 3 is a schematic diagram of a conductivity detection structure according to the present utility model.

In the figure:

1. a liquid supply pipeline; 2. a return line; 3. a heating structure; 4. detecting the bent pipe; 41. an ascending pipe; 42. a down pipe; 43. a connecting pipe; 5. a conductivity detection structure; 6. a horizontal tube; 7. a reducer pipe; 8. a heat medium input line; 9. a temperature monitoring structure; 10. a filtering structure; 11. a regulating valve; 12. a heat medium output line; 13. overhauling a pipeline; 14. an input stop valve; 15. an output stop valve; 16. overhauling a stop valve; 17. a pneumatic shut-off valve; 18. an upstream communication structure; 19. a downstream communication structure; 20. a waste liquid recovery pipeline; 21. a gas supply structure; 22. a steam supply structure; 23. a sterile canister; 24. and a reflux pump.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the present utility model provides a sterile tank cleaning device, in which a sterile tank 23 communicates with a cleaning station through a liquid supply line 1 and a return line 2 of the sterile tank cleaning device to form a cleaning circuit. Specifically, the cleaning station is a CIP cleaning station. The aseptic tank 23 is also connected to an air supply structure 21 for inputting compressed air, a steam supply structure 22 for inputting steam, an upstream communication structure 18 for communicating with equipment of an upstream process, and a downstream communication structure 19 for communicating with equipment of a downstream process. The conductivity of the cleaning solution in the return pipeline 2 is detected by the conductivity detection structure so as to judge the difference of the cleaning solution according to the conductivity, thereby providing conditions for timing of circulating flushing of different cleaning solutions, recovery of different cleaning solutions and the like.

The cleaning process of the sterile tank mainly comprises the following steps:

s1, circularly flushing alkali liquor, wherein the temperature of the alkali liquor is required to be above 80 ℃, and circularly flushing for at least 1800 seconds in a specified concentration range and a specified flow range;

s2, filling water into the aseptic tank 23, and pushing the alkali liquor out of the aseptic tank 23 by pure water, wherein the temperature of the water is 10-30 ℃;

s3, evacuating the sterile tank 23 to enable the alkali liquor in the sterile tank 23 to be lowered to a low liquid level;

s4, pushing alkali liquor to the conductivity detection structure, and recycling the alkali liquor to the cleaning station;

s5, intermediate water circularly washes, namely, washing the residual alkali liquor in the pipeline cleanly;

s6, pouring acid liquor into the aseptic tank 23, wherein the temperature of the acid liquor is required to be 70-75 ℃;

step S7, evacuating the sterile tank 23 to enable the pure water in the sterile tank 23 to be lowered to a low liquid level;

s8, pushing water to the conductivity detection structure;

and S9, acid liquor is circularly washed, wherein the temperature of the acid liquor is required to be above 70 ℃, and the acid liquor is circularly washed for at least 1200 seconds in a specified concentration range and a specified flow range.

The inventor found that the following problems exist in the conventional aseptic tank cleaning apparatus when the cleaning process is performed:

the temperature of the cleaning loop and the aseptic tank 23 after the alkaline liquor circulation flushing in the first step S1 is above 80 ℃, the alkaline liquor is pushed out from water to intermediate water circulation flushing in the steps S2 to S5, the temperature of the water is 10-30 ℃, the acid liquor is injected into the acid liquor circulation flushing in the steps S6 to S9, the timing of the acid liquor circulation flushing can be carried out after the temperature of the acid liquor reaches 75 ℃ from about 20 ℃, and the time required for the temperature of the flushing medium to reach the required temperature after the switching is longer due to the long pipeline length and large volume of the cleaning loop.

Secondly, because the cleaning medium is pressed back to the cleaning station by compressed air during the cleaning of the sterile tank 23, the high gas content of the cleaning liquid is easy to appear, the conductivity detection structure is unstable during the cleaning, especially the cleaning is serious during the cyclic cleaning of the alkali liquor, foam is generated inside, the conductivity detected by the conductivity detection structure is suddenly high and suddenly low, and the timing of the cyclic cleaning is directly stopped. In practice, the cleaning is still running, and the time of the actual cyclic flushing is longer than the time of timing, so that the time is too long, and the production efficiency is seriously affected.

Thirdly, the distance between the sterile tank 23 and the cleaning station is far, the return pipeline 2 is long, and the pipeline and the elbow of the return pipeline 2 have piezoresistance on fluid, so that the pressure loss of the cleaning loop is large, and the time required for pushing the cleaning fluid to the cleaning station is long only by the compressed air in the sterile tank 23.

In order to solve the first problem described above, as shown in fig. 1 and 2, in the embodiment of the present utility model, the aseptic tank cleaning apparatus further includes a heating structure 3, and the dispensing end of the cleaning station communicates with the liquid supply line 1 through the heating structure 3. The cleaning liquid L supplied from the dispensing end of the cleaning station can flow into the aseptic tank 23 via the liquid supply line 1 after being heated by the heating structure 3. Specifically, in the above step S5, the heating structure 3 heats the water to 70 ℃ or higher.

In order to reduce the cost and the energy consumption, the heat medium input end of the heating structure 3 is communicated with a heat medium input pipeline 8, and steam condensate C recovered from a workshop is used as a heat fluid to be input into the heating structure 3 through the heat medium input pipeline 8.

In order to control the heating structure 3 to accurately heat the cleaning liquid L to a required temperature, a temperature monitoring structure 9 is arranged on the liquid supply pipeline 1, a regulating valve 11 is arranged on the heat medium input pipeline 8, and the temperature monitoring structure 9 is in signal connection with the regulating valve 11. The temperature monitoring structure 9 includes a temperature sensor for detecting temperature and a controller for controlling the adjusting valve 11 according to signals of the temperature sensor, the controller adopts a control mode of PID adjustment, the temperature of the heated cleaning liquid is detected through the temperature sensor, the controller controls the opening of the adjusting valve 11 according to the temperature signals, thereby realizing closed-loop control of heating the cleaning liquid L by the heating structure 3, and adjusting according to the temperatures required by different cleaning liquids.

In addition, the filtering structure 10 is arranged on the heat medium input pipeline 8 so as to filter impurities in the steam condensate water recovered from the workshop, thereby being beneficial to protecting the service life of the heating structure 3 and downstream equipment communicated with the heating structure. The heat medium output end of the heating structure 3 is communicated with a heat medium output pipeline 12, and an output stop valve 15 for controlling the on-off of the heat medium output pipeline 12 is arranged on the heat medium output pipeline 12 so as to control the discharge of steam condensate. The heat medium input pipeline 8 is also provided with an input stop valve 14 and a pneumatic stop valve 17, the heat medium output end of the heating structure 3 is also communicated with an overhaul pipeline 13, and the overhaul pipeline 13 is provided with an overhaul stop valve 16 so as to facilitate overhaul of equipment. The heating structure 3 may be a tube heat exchanger, or other heat exchangers may be used.

Wherein the heating structure 3 is mounted as horizontally as possible and taking into account the service space. If the installation height of the heating structure 3 is higher than 2 meters, an overhaul platform needs to be configured, so that later maintenance is facilitated. In order to avoid the operators from being scalded by the high temperature of the heat medium and the heat medium causing high temperature to the environment, the heating structure 3, the heat medium input pipeline 8 and the heat medium output pipeline 12 need to be insulated, for example, an aluminum silicate insulation layer, a 50mm thick insulation layer and a stainless steel sheet with the outer surface of 0.5mm thickness are sequentially arranged from inside to outside, wherein the insulation layer is made of an A-level or above insulation material, and the sheet is tightly fixed by using aluminum rivets or stainless steel self-tapping screws. The steam condensate is recycled and is recovered to the condensate tank through a heat medium output pipeline 12. The heating structure 3 is installed in series in the original cleaning loop, the trend of the original pipeline is not changed as much as possible, and the change of flow caused by the increase of the pipe resistance of the pipeline due to the transformation of the pipeline is avoided. The conveying pipeline of the heating medium and the conveying pipeline of the heated medium are installed in a reverse convection mode, so that heating is fully and rapidly improved. The heating structure 3, the connecting flange, the pipeline and other structures are all made of 316L materials.

In order to solve the second problem described above, as shown in fig. 1 and 3, in an embodiment of the present utility model, the sterile tank cleaning apparatus further includes: the detection bent pipe 4 is arranged below the return pipe 2, two ends of the detection bent pipe 4 are communicated with the return pipe 2, the detection bent pipe 4 is provided with an ascending pipe 41, and cleaning liquid flowing into the detection bent pipe 4 from the return pipe 2 can fill the ascending pipe 41 from bottom to top and flow back into the return pipe 2; the conductance detecting structure 5 is mounted on the ascending pipe 41. By additionally arranging the detection elbow 4 and installing the conductivity detection structure 5 on the ascending pipe 41 of the detection elbow 4, due to different specific gravities of gas and liquid, after the cleaning liquid in the return pipeline 2 falls into the detection elbow 4, the doped gas in the cleaning liquid is dissipated into the return pipeline 2 and cannot enter the ascending pipe 41, so that the cleaning liquid after the gas is separated can continuously flow into the ascending pipe 41, and the detection accuracy and stability of the conductivity detection structure 5 are ensured. Specifically, the conductivity detecting structure 5 may be a conductivity meter, and detects the temperature of the washing liquid while detecting the conductivity of the washing liquid flowing back.

To further ensure that gas does not enter the up-tube 41, the up-tube 41 is arranged extending in a vertical direction. Specifically, the length of the ascending pipe 41 in the vertical direction is not less than 60 cm.

The detecting elbow 4 further comprises a down pipe 42 and a connecting pipe 43, the connecting pipe 43 extends in the horizontal direction, the down pipe 42 extends in the vertical direction, and the up pipe 41 is communicated with the up pipe 41 through the connecting pipe 43. The down pipe 42 and the up pipe 41 are disposed below the return pipe 2 at intervals in the conveying direction of the return pipe 2. By providing the down pipe 42, the cleaning liquid in the return line 2 falls into the down pipe 42 first, and the gas doped in the cleaning liquid can be quickly dissipated upward in the down pipe 42 to the return line 2. By providing the connection pipe 43, the entry of gas into the ascending pipe 41 is further avoided.

The return line 2 comprises a horizontal pipe 6, which horizontal pipe 6 extends in the horizontal direction and is located above the detection elbow 4. The inner diameter of the horizontal tube 6 is smaller than the diameter of the detection elbow 4. By arranging the horizontal pipe 6 with smaller diameter, the cleaning liquid positioned at the upstream section of the return pipeline 2 is beneficial to falling into the detection bent pipe 4, and the dissipated gas can flow into the downstream section of the return pipeline 2 through the horizontal pipe 6, so that the separation of the gas is more beneficial. Specifically, both ends of the horizontal pipe 6 are communicated with an upstream section of the return line 2 and a downstream section of the return line 2 through two reducing pipes 7. The horizontal pipe 6 has an inner diameter smaller than the inner diameters of the upstream section of the return line 2 and the downstream section of the return line 2.

In order to solve the third problem, as shown in fig. 1 and 3, a reflux pump 24 is mounted on the reflux pipe 2 in the embodiment of the present utility model. The reflux pump 24 assists the cleaning liquid L to reflux to the cleaning station, thereby ensuring that the cleaning liquid is not accumulated, and the liquid level is kept optimal in the whole cleaning period, which is beneficial to thoroughly flushing the tank bottom of the sterile tank 23. Specifically, the return pump 24 is a self-priming pump.

By solving the three problems, the utility model can compress the cleaning time of the sterile tank 23 to about 40 minutes, effectively reduce the consumption of mechanical energy and electric energy, reduce the time for waiting for cleaning the sterile tank 23 in the previous and subsequent procedures, improve the operation efficiency of the whole production line and improve the productivity.

In summary, the sterile tank cleaning device of the utility model has the following beneficial effects:

(1) The cleaning efficiency is improved, the cleaning time is shortened, and the labor cost, the material resource cost and the time cost can be effectively reduced.

(2) The increase of the productivity is beneficial to the increase of the benefit.

(3) The connection with the upstream and downstream equipment of the production process is more compact.

(4) Reducing unnecessary mechanical and electrical energy.

(5) The reflux pressure loss is reduced, the timely recovery of the cleaning liquid in the sterile tank 23 is ensured, and the continuous cleaning process is facilitated.

(6) Without waiting for the time required for the cleaning medium to drop to a low level.

(7) The temperature and the electric conduction of the cleaning liquid in the cleaning loop are accurately collected in real time, and the interruption of the circulation timing is avoided, so that the cleaning time is shortened.

The foregoing is merely a few embodiments of the present utility model and those skilled in the art may make various modifications or alterations to the embodiments of the present utility model in light of the disclosure herein without departing from the spirit and scope of the utility model.

Claims (11)

1. The utility model provides a sterile tank belt cleaning device, includes liquid supply pipeline and return line, and sterile tank passes through liquid supply pipeline with return line and cleaning station intercommunication form the cleaning circuit, its characterized in that, sterile tank belt cleaning device still includes:

the distribution end of the cleaning station is communicated with the liquid supply pipeline through the heating structure;

the detection bent pipe is positioned below the return pipeline, two ends of the detection bent pipe are communicated with the return pipeline, the detection bent pipe is provided with an ascending pipe, and cleaning liquid flowing into the detection bent pipe from the return pipeline can fill the ascending pipe from bottom to top and flow back into the return pipeline;

and the electric conduction detection structure is arranged on the ascending pipe.

2. The sterile tank cleaning apparatus according to claim 1, wherein,

the ascending pipe extends along the vertical direction.

3. The sterile tank cleaning apparatus according to claim 2, wherein,

the length of the ascending pipe in the vertical direction is not less than 60 cm.

4. The sterile tank cleaning apparatus according to claim 1, wherein,

the detection elbow pipe further comprises a descending pipe and a connecting pipe, the connecting pipe extends in the horizontal direction, the descending pipe extends in the vertical direction, and the ascending pipe is communicated with the ascending pipe through the connecting pipe.

5. The sterile tank cleaning apparatus according to claim 1, wherein,

the return line comprises a horizontal pipe which extends in the horizontal direction and is positioned above the detection bent pipe.

6. The sterile tank cleaning apparatus according to claim 5, wherein,

the inner diameter of the horizontal pipe is smaller than that of the detection bent pipe.

7. The sterile tank cleaning apparatus according to claim 1, wherein,

the heat medium input end of the heating structure is communicated with a heat medium input pipeline, and steam condensate water recovered from a workshop is used as a heat fluid and is input into the heating structure through the heat medium input pipeline.

8. The sterile tank cleaning apparatus according to claim 7, wherein,

the liquid supply pipeline is provided with a temperature monitoring structure, the heat medium input pipeline is provided with a regulating valve, and the temperature monitoring structure is in signal connection with the regulating valve.

9. The sterile tank cleaning apparatus according to claim 7, wherein,

and a filtering structure is arranged on the heat medium input pipeline.

10. The sterile tank cleaning apparatus according to claim 1, wherein,

the heating structure is a tubular heat exchanger.

11. The sterile tank cleaning apparatus according to claim 1, wherein,

and a reflux pump is arranged on the reflux pipeline.