Sterilization machine cleaning fluid recovery device and in-situ cleaning system

Abstract

The utility model relates to the technical field of equipment cleaning, and discloses a sterilization machine cleaning liquid recovery device and an in-situ cleaning system, the sterilization machine cleaning liquid recovery device comprises an acid liquid recovery tank, an alkali liquid recovery tank, and a first filtering device and a second filtering device which are respectively arranged in one-to-one correspondence with the acid liquid recovery tank and the alkali liquid recovery tank; the inlet ends of the acid liquor recovery tank and the alkali liquor recovery tank are respectively connected with a ground discharge valve of the sterilization machine through an acid liquor recovery line and an alkali liquor recovery line; and the outlet ends of the acid liquor recovery tank and the alkali liquor recovery tank are respectively connected with the acid liquor adding end and the alkali liquor adding end of the in-situ cleaning system through a first filtering device and a second filtering device. According to the utility model, acid liquor and alkali liquor are filtered and circulated to the in-situ cleaning system for reuse after being accurately recovered, energy waste caused by direct discharge of cleaning fluid to the ground is avoided, the cleaning fluid is filtered through the filtering device, automatic recovery of the cleaning fluid of the sterilization machine is realized, the utilization rate of the cleaning fluid is improved, and energy conservation and emission reduction are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment cleaning, in particular to a sterilizer cleaning liquid recovery device and an on-site cleaning system. Background Art

[0002] In the industrial production process of fluid food, a Cleaning in Place (CIP) system is usually used for on-site cleaning. Taking a food factory as an example, the sterilizer adopts an independent single-time non-recycling cleaning. Since the sterilizer uses heating to sterilize the food in this link, it guarantees the quality and safety of the subsequent production links and even the shelf life of the product. Therefore, the sterilization link is one of the core links in food production. In order to clean the equipment well, the concentration of the cleaning liquid used is higher than that of other links, which increases the detergency and effectively removes dirt to ensure the quality and safety of the entire food production line. Due to the use of heat treatment, the sterilizer in this link will produce a lot of dirt, resulting in a large amount of impurities in the cleaning liquid of this link. In order to avoid cross contamination and to ensure the safety of the entire production line and the food, in the existing technology, the cleaning liquid of the sterilizer will be cleaned separately and discharged after washing. However, this direct discharge method causes a lot of waste of cleaning liquid. Utility Model Content

[0003] In view of this, the utility model provides a sterilizer cleaning liquid recovery device and an on-site cleaning system to solve the problem of energy waste caused by direct discharge of cleaning liquid in the sterilizer in the on-site cleaning system in the related art.

[0004] In a first aspect, the utility model provides a sterilizer cleaning liquid recovery device, which is applied to an in-situ cleaning system, the device comprising: an acid recovery tank, an alkali recovery tank, and a first filter device and a second filter device respectively arranged in a one-to-one correspondence with the acid recovery tank and the alkali recovery tank;

[0005] The inlet ends of the acid recovery tank and the alkali recovery tank are connected to the drain valve of the sterilizer through the acid recovery line and the alkali recovery line respectively;

[0006] The outlet ends of the acid recovery tank and the alkali recovery tank are connected to the acid addition end and the alkali addition end of the in-situ cleaning system through the first filtering device and the second filtering device respectively.

[0007] The utility model provides an acid recovery tank, an alkali recovery tank, and a first filtering device and a second filtering device respectively provided in one-to-one correspondence with the acid recovery tank and the alkali recovery tank, so that the cleaning liquid in the sterilizer that is originally to be discharged directly to the ground is accurately recovered and stored. The two filtering devices are connected to the acid addition end and the alkali addition end of the on-site cleaning system, so that the acid and alkali liquid are accurately recovered and then filtered and circulated to the on-site cleaning system for reuse, avoiding the energy waste caused by directly discharging the cleaning liquid to the ground. At the same time, the filtering of the filtering devices ensures that the recovered cleaning liquid meets the use requirements of the acid and alkali liquid of the on-site cleaning system, realizing the automatic recovery of the cleaning liquid of the sterilizer, further improving the utilization rate of the cleaning liquid of the entire on-site cleaning system, and achieving energy saving and emission reduction.

[0008] In an optional embodiment, the sterilizer cleaning liquid recovery device further includes: an acid solution discharge line and an alkali solution discharge line;

[0009] The acid liquid recovery tank is connected to the first filtering device through the acid liquid discharge line, and the acid liquid discharge line is provided with a first discharge pump;

[0010] The alkali solution recovery tank is connected to the second filtering device through the alkali solution discharge line, and a second discharge pump is provided on the alkali solution discharge line.

[0011] The utility model provides an acid liquid discharge line and an alkali liquid discharge line as well as discharge pumps on the acid liquid discharge line and the alkali liquid discharge line, so that the cleaning liquid recovered in the recovery tank can be automatically transported to the corresponding filter device through the discharge pump for filtration and added to the on-site cleaning system, thereby improving the degree of automation of the entire sterilizer cleaning liquid recovery device.

[0012] In an optional embodiment, the inlet end of the acid recovery tank is connected to the alkali tank of the in-situ cleaning system through an alkali cleaning inlet line;

[0013] The inlet end of the alkali solution recovery tank is connected to the acid tank of the on-site cleaning system through an acid solution cleaning inlet line.

[0014] The utility model connects the acid recovery tank and the alkali recovery tank to the alkali tank and the acid tank of the on-site cleaning system respectively, so that the on-site cleaning system can realize self-cleaning of the acid recovery tank and the alkali recovery tank, ensure the cleanliness of the acid recovery tank and the alkali recovery tank, further ensure the quality of the recovered cleaning liquid, and enhance the user experience.

[0015] In an optional embodiment, the sterilizer cleaning liquid recovery device further includes: a first steering control valve group and a second steering control valve group;

[0016] The first filter device is connected to the input end of the first steering control valve group, and the output end of the first steering control valve group is connected to the acid addition end of the in-situ cleaning system and the acid recovery line respectively;

[0017] The second filtering device is connected to the input end of the second steering control valve group, and the output end of the second steering control valve group is connected to the alkali solution addition end of the in-situ cleaning system and the alkali solution recovery line respectively.

[0018] The utility model arranges a first steering control valve group and a second steering control valve group between the filtering device and the on-site cleaning system, which can realize the functional switching of the cleaning liquid recycling in the acid recovery tank and the alkali recovery tank and the self-cleaning of the acid recovery tank and the alkali recovery tank, further improving the flexibility of the sterilizer cleaning liquid recovery device and enhancing the user experience.

[0019] In an optional embodiment, the first filter device and the second filter device both include: a pressure detection device and two cleaning pipelines, wherein:

[0020] Each cleaning pipeline is provided with a bag filter and a control switch assembly, the control switch assembly is used to control the on and off of the cleaning pipeline, and the bag filter is detachably provided on the cleaning pipeline;

[0021] The pressure detection device is used to respectively collect the inlet pressure and outlet pressure of the cleaning pipeline, and send the inlet pressure and outlet pressure to the main controller of the in-situ cleaning system;

[0022] The master controller controls the actions of corresponding control switch components on the two cleaning pipelines by comparing the inlet end pressure and the outlet end pressure, and issues a bag filter replacement prompt.

[0023] The utility model realizes cleaning of the recovered cleaning fluid by setting up two cleaning pipelines consisting of a bag filter and a control switch assembly, thereby improving the cleanliness of the recovered cleaning fluid. In addition, by setting up a pressure detection device to detect the pipeline pressure, the operation of the two cleaning pipelines is controlled, thereby ensuring the cleaning efficiency of the cleaning fluid, facilitating the replacement of the bag filter, and not affecting the normal operation of the entire sterilizer cleaning fluid recovery device.

[0024] In an optional embodiment, the pressure detection device includes: a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged at the inlet end of the cleaning pipeline, and the second pressure sensor is arranged at the outlet end of the cleaning pipeline;

[0025] And / or, the control switch assembly includes: fully automatic angle seat valves respectively arranged at both ends of the bag filter, and the fully automatic angle seat valves are used to control the flow or shutoff of the cleaning pipeline.

[0026] This utility model detects the pressure of the liquid in the cleaning pipeline by installing two pressure sensors at the inlet and outlet ends, respectively. The more impurities accumulated by the bag filter, the greater the pressure difference between the inlet and outlet ends. Therefore, by installing two pressure sensors at the inlet and outlet ends, the pressure data can be used to reflect whether the bag filter needs to be cleaned and replaced, providing an accurate data basis for subsequent control of the cleaning pipeline, making it easier for users to understand the usage of the bag filter. In addition, by using a fully automatic angle seat valve to control the on-off of the cleaning pipeline, due to its outstanding anti-water hammer performance, it can effectively deal with the water hammer phenomenon that often occurs in the on-site cleaning system, ensuring the safety of the operation of the entire sterilizer cleaning liquid recovery device.

[0027] In an optional embodiment, the first filtering device and the second filtering device both further include:

[0028] A water receiving tray and a drain valve are provided on each cleaning pipeline. The water receiving tray is provided below the bag filter and the drain valve and is used to hold liquid discharged through the drain valve or liquid discharged when the bag filter is disassembled.

[0029] The utility model provides a drain valve on the cleaning pipeline, which can be used to drain the liquid before replacing the bag filter. By providing a water receiving tray, the utility model can avoid leakage of residual liquid in the cleaning pipeline and the bag filter when replacing the bag filter, which may cause pollution to the entire on-site cleaning system, and also facilitate the operation and maintenance personnel to replace and repair accessories.

[0030] In an optional embodiment, the sterilizer cleaning liquid recovery device further includes: a top material system and a distribution pipe;

[0031] The input end of the top material system is connected to the clean water tank of the in-situ cleaning system, and the output end is connected to the acid solution discharge line and the alkali solution discharge line respectively;

[0032] The distribution pipe is connected to the outlet ends of the acid recovery tank and the alkali recovery tank respectively. A sampling ball valve is provided on the distribution pipe, and the sampling ball valve is used to sample the liquid in the acid recovery tank or the alkali recovery tank.

[0033] The utility model utilizes a top material system to connect with the clean water tank of the on-site cleaning system and the acid liquid discharge line and the alkali liquid discharge line respectively, and can use the clean water in the on-site cleaning system to clean the entire sterilizer cleaning liquid recovery device, and sample the liquid in the acid liquid recovery tank or the alkali liquid recovery tank through the distribution pipe and the sampling ball valve, so that the user can understand the quality of the recovered cleaning liquid.

[0034] In an optional embodiment, the acid solution recovery tank and the alkali solution recovery tank are both provided with a temperature detection device and a liquid level detection device, and the temperature detection device and the liquid level detection device are both connected to the main controller of the in-situ cleaning system.

[0035] The utility model provides a temperature detection device and a liquid level detection device in both the acid recovery tank and the alkali recovery tank, and connects them to the main controller of the on-site cleaning system. The main controller can be used to monitor the temperature and liquid level of the recovered cleaning liquid in the acid recovery tank and the alkali recovery tank, providing a data basis for subsequent control, which is conducive to improving the degree of automation of the operation of the cleaning liquid recovery device of the entire sterilizer.

[0036] In a second aspect, the present invention further provides an on-site cleaning system, which includes: a sterilizer and a sterilizer cleaning liquid recovery device as described in the first aspect and any optional embodiment thereof.

[0037] The utility model provides a sterilizer cleaning liquid recovery device in the on-site cleaning system, and provides an acid recovery tank, an alkali recovery tank, and a first filtering device and a second filtering device respectively corresponding to the acid recovery tank and the alkali recovery tank, so that the cleaning liquid in the sterilizer that is to be directly discharged to the ground is accurately recovered and stored. The two filtering devices are connected to the acid addition end and the alkali addition end of the on-site cleaning system, so that the acid and alkali are accurately recovered and then filtered and circulated to the on-site cleaning system for reuse, thereby avoiding the energy waste caused by directly discharging the cleaning liquid to the ground. At the same time, the filtering of the filtering device ensures that the recovered cleaning liquid meets the use requirements of the acid and alkali liquid of the on-site cleaning system, thereby realizing automatic recovery of the sterilizer cleaning liquid, further improving the cleaning liquid utilization rate of the entire on-site cleaning system, and achieving energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1This is a schematic structural diagram of a sterilizer cleaning liquid recovery device according to an embodiment of the present utility model;

[0040] Figure 2 This is a schematic structural diagram of a first filter device and a second filter device according to an embodiment of the present utility model;

[0041] Figure 3 It is a structural schematic diagram of an in-situ cleaning system according to an embodiment of the utility model. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be a wireless connection or a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. It should also be noted that the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Taking a food factory as an example, the sterilizer will be the key node among the cleaning targets (products passing through pipes, valves, tanks and other mechanical equipment), and the cleaning targets will be graded and classified for cleaning. The cleaning targets before the sterilizer are concentrated in a CIP station for cleaning. The CIP of this cleaning target does not need to be disinfected, the cleaning level is low, and it is the easiest to clean; the cleaning targets after the sterilizer are concentrated in a CIP station for cleaning. The CIP of this cleaning target needs to be disinfected, the cleaning level is intermediate, and it is relatively easy to clean; the sterilizer adopts independent single-time non-recycling cleaning and disinfection at the same time, with the highest cleaning level and the greatest cleaning difficulty.

[0046] To save energy and reduce consumption, cleaning fluids (such as acids and alkalis) are typically sorted and centrally recovered, filtered for impurities, and then quantitatively added for reuse after testing for effective concentration. In addition to the initial flush, acids, alkalis, and hot water are typically recycled. Cleaning fluids (concentrated acid, concentrated alkali, and fresh water) are quantitatively replenished based on effective concentrations measured by a conductivity meter. Recycled cleaning fluids often carry some impurities of the cleaning target, and these impurities can accumulate and precipitate within the tank.

[0047] Because the concentration of cleaning agents in sterilizers is higher than in other CIP stations, recycling, filtering, and reusing the sterilizer's cleaning fluid does not dilute the cleaning fluid in other CIP stations, thus maintaining its recyclable value. However, due to the high concentration of impurities in sterilizer cleaning fluid and the fact that discharge is not centralized, simple recycling is not possible. Therefore, the cleaning fluid is often directly discharged to the ground or simply stored and reused, resulting in waste of cleaning fluid.

[0048] In view of the above problems and defects, the present invention provides a sterilizer cleaning liquid recovery device, which is applied to the on-site cleaning system, such as Figure 1 As shown, the sterilizer cleaning liquid recovery device includes:

[0049] An acid recovery tank 101, an alkali recovery tank 102, and a first filter device 103 and a second filter device 104 respectively provided in one-to-one correspondence with the acid recovery tank 101 and the alkali recovery tank 102;

[0050] The inlet ends of the acid recovery tank 101 and the alkali recovery tank 102 are connected to the drain valve of the sterilizer through the acid recovery line 105 and the alkali recovery line 106 respectively;

[0051] The outlet ends of the acid recovery tank 101 and the alkali recovery tank 102 are connected to the acid addition end and the alkali addition end of the in-situ cleaning system through the first filtering device 103 and the second filtering device 104 respectively.

[0052] Specifically, the above-mentioned acid recovery tank 101 and alkali recovery tank 102 can both adopt an insulated tank body for recovering the cleaning liquid (>60℃) discharged by the sterilizer. They can also be equipped with detachable washing balls, manual slag discharge at the bottom of the tank, manhole safety electronic lock, tank body equipped with instruments, etc. according to actual needs, and can be monitored by the automated central control system of the on-site cleaning system, that is, the main controller, and equipped with a temperature sensor for monitoring the temperature of the cleaning liquid, equipped with high, medium and low liquid level switches and a continuous liquid level sensor for monitoring and controlling the liquid level collection and use in the tank, etc. This is just an example, and the present invention is not limited to this.

[0053] The embodiment of the present utility model provides an acid recovery tank 101, an alkali recovery tank 102, and a first filter device 103 and a second filter device 104 which are respectively provided in one-to-one correspondence with the acid recovery tank 101 and the alkali recovery tank 102, so as to accurately recover and store the cleaning liquid in the sterilizer that is originally to be discharged to the ground, and connect the two filter devices to the acid addition end and the alkali addition end of the on-site cleaning system, so as to achieve the filtering and recycling of the acid and alkali liquid to the on-site cleaning system for reuse after accurate recovery, thereby avoiding the energy waste caused by direct discharge of the cleaning liquid to the ground. At the same time, the filtration of the filter device ensures that the recovered cleaning liquid meets the use requirements of the acid and alkali liquid of the on-site cleaning system, thereby realizing the automatic recovery of the cleaning liquid of the sterilizer, further improving the utilization rate of the cleaning liquid of the entire on-site cleaning system, and achieving energy saving and emission reduction.

[0054] Specifically, if Figure 1 As shown, the sterilizer cleaning liquid recovery device also includes: an acid liquid discharge line 107 and an alkali liquid discharge line 108; the acid liquid recovery tank 101 is connected to the first filter device 103 through the acid liquid discharge line 107, and the acid liquid discharge line 107 is provided with a first discharge pump ( Figure 1 alkali recovery tank 102 is connected to the second filtering device 104 via an alkali discharge line 108, and an alkali discharge line 108 is provided with a second discharge pump ( Figure 1 not shown).

[0055] In actual application, the first discharge pump and the second discharge pump are both centrifugal pumps, and a round-hole stainless steel angle filter is added in front of the pump to protect the pump and prevent solid particles from damaging the pump. This utility model only takes this as an example and is not limited to this.

[0056] The embodiment of the utility model provides an acid liquid discharge line 107 and an alkali liquid discharge line 108 as well as a discharge pump provided on the acid liquid discharge line 107 and the alkali liquid discharge line 108, so that the cleaning liquid recovered in the recovery tank can be automatically transported to the corresponding filter device through the discharge pump for filtration and added to the on-site cleaning system, thereby improving the degree of automation of the entire sterilizer cleaning liquid recovery device.

[0057] In some optional embodiments, such as Figure 1 As shown, the inlet end of the acid recovery tank 101 is connected to the alkali tank of the in-situ cleaning system through the alkali cleaning inlet line 109;

[0058] The inlet end of the alkali solution recovery tank 102 is connected to the acid tank of the in-situ cleaning system through the acid solution cleaning inlet line 110.

[0059] By connecting the acid recovery tank 101 and the alkali recovery tank 102 to the alkali tank and the acid tank of the on-site cleaning system respectively, the embodiment of the utility model can realize the self-cleaning of the acid recovery tank 101 and the alkali recovery tank 102 by the on-site cleaning system, thereby ensuring the cleanliness of the acid recovery tank 101 and the alkali recovery tank 102, further ensuring the quality of the recovered cleaning liquid, and improving the user experience.

[0060] In an optional embodiment, the sterilizer cleaning liquid recovery device further includes: a first steering control valve group 111 and a second steering control valve group 112;

[0061] The first filter device 103 is connected to the input end of the first steering control valve group 111, and the output end of the first steering control valve group 111 is connected to the acid addition end and the acid recovery line 105 of the in-situ cleaning system respectively;

[0062] The second filtering device 104 is connected to the input end of the second steering control valve group 112 , and the output end of the second steering control valve group 112 is connected to the alkali solution addition end and the alkali solution recovery line 106 of the in-situ cleaning system respectively.

[0063] For example, the first steering control valve group 111 and the second steering control valve group 112 may be three-way valves or other control valves with pipeline conduction switching functions, but the present invention is not limited thereto.

[0064] The embodiment of the present utility model arranges a first steering control valve group 111 and a second steering control valve group 112 between the filtering device and the on-site cleaning system, thereby realizing the functional switching between the recycling of the cleaning liquid in the acid recovery tank 101 and the alkali recovery tank 102 and the self-cleaning of the acid recovery tank 101 and the alkali recovery tank 102, further improving the flexibility of the sterilizer cleaning liquid recovery device and enhancing the user experience.

[0065] In some optional embodiments, such as Figure 2 As shown, the first filter device 103 and the second filter device 104 both include: a pressure detection device 301 and two cleaning pipelines 302, wherein:

[0066] Each cleaning pipeline 302 is provided with a bag filter 3021 and a control switch assembly 3022. The control switch assembly 3022 is used to control the on and off of the cleaning pipeline 302. The bag filter 3021 is detachably provided on the cleaning pipeline 302.

[0067] The pressure detection device 301 is used to collect the inlet pressure and outlet pressure of the cleaning pipeline 302 respectively, and send the inlet pressure and outlet pressure to the main controller of the in-situ cleaning system ( Figure 2 not shown);

[0068] The main controller controls the actions of the corresponding control switch components 3022 on the two cleaning pipelines 302 by comparing the inlet pressure and the outlet pressure, and issues a replacement prompt for the bag filter 3021.

[0069] Exemplarily, the above-mentioned bag filter 3021 can adopt a bag filter with proximity switch monitoring, and its filter element can adopt a detachable bag filter element. Compared with traditional stainless steel hole and stainless steel slit filters, it can remove trace fine impurities, which can reach the micron level, and can intercept more than 95% of impurities in the CIP return liquid visible to the naked eye. The CIP liquid can pass through the filter, and it has the advantages of small pressure drop and easy replacement. The filter element material of the bag filter 3021 is made of food-grade contactable material nylon, which has the advantage of not being easily stretched and deformed. At the same time, it adopts heat setting treatment at the intersection of warp and weft, which can maintain The aperture does not deform and can effectively filter impurities. At the same time, it can withstand acid, alkali, high temperature and other working conditions of CIP cleaning. The filter housing is made of stainless steel 316L. In terms of design, the top cover adopts a fixed thread + sealing design, which is not only convenient for factory personnel to replace the filter element later, but also installs a proximity switch at the thread, which is associated with the automated central control system to protect the operator's safety when changing the filter element. When the operator opens the filter housing, the screw position changes, and the proximity switch sends a signal to the automated operating system to disconnect the corresponding control switch component to ensure that no liquid can flow on this side to prevent the cleaning fluid from spraying out of the filter housing, causing personnel safety to be threatened.

[0070] The embodiment of the utility model realizes the cleaning of the recovered cleaning fluid by setting up two cleaning pipelines consisting of a bag filter and a control switch assembly, thereby improving the cleanliness of the recovered cleaning fluid. In addition, by setting up a pressure detection device to detect the pipeline pressure, the operation of the two cleaning pipelines is controlled, thereby ensuring the cleaning efficiency of the cleaning fluid, facilitating the replacement of the bag filter, and not affecting the normal operation of the entire sterilizer cleaning fluid recovery device.

[0071] In an optional embodiment, the pressure detection device 301 includes: a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged at the inlet end of the cleaning pipeline, and the second pressure sensor is arranged at the outlet end of the cleaning pipeline;

[0072] And / or, the control switch assembly 3022 includes: fully automatic angle seat valves respectively arranged at both ends of the bag filter, and the fully automatic angle seat valves are used to control the flow or shutoff of the cleaning pipeline.

[0073] Compared to other valves, fully automatic angle seat valves offer superior water hammer resistance, effectively addressing the water hammer phenomenon that often occurs in CIP systems and ensuring overall system safety. The fully automatic angle seat valve utilizes three structural features: a right-angle flow path, increased opening and closing speed, and a stem and seal design that work together to reduce the time required to close the valve, thereby minimizing the risk of water hammer.

[0074] The embodiment of the present invention detects the pressure of the liquid in the cleaning pipeline by respectively arranging two pressure sensors at the inlet and outlet ends. The more impurities accumulated by the bag filter, the greater the pressure difference between the inlet and outlet ends of the liquid. Therefore, by respectively arranging two pressure sensors at the inlet and outlet ends, the pressure data can be used to reflect whether the bag filter needs to be cleaned and replaced, providing an accurate data basis for the subsequent control of the cleaning pipeline, making it easier for users to understand the usage of the bag filter. In addition, by using a fully automatic angle seat valve to control the on-off of the cleaning pipeline, due to its outstanding anti-water hammer performance, it can effectively deal with the water hammer phenomenon that often occurs in the on-site cleaning system, ensuring the safety of the operation of the entire sterilizer cleaning liquid recovery device.

[0075] In some optional embodiments, the first filtering device 103 and the second filtering device 104 each further include:

[0076] Water tray ( Figure 2 302) and a drain valve 303 is provided on each cleaning pipeline 302, and a water receiving tray is provided below the bag filter 3021 and the drain valve 303, for holding the liquid discharged through the drain valve 303 or the liquid discharged when the bag filter 3021 is disassembled.

[0077] The embodiment of the utility model can perform drainage operations before replacing the bag filter by arranging a drain valve on the cleaning pipeline, and can avoid residual liquid leakage in the cleaning pipeline and the bag filter when replacing the bag filter by arranging a water receiving tray, which may cause pollution to the entire on-site cleaning system, and also facilitate the operation and maintenance personnel to replace and repair accessories.

[0078] In actual applications, the main controller of the on-site cleaning system can control the control switch component on the first cleaning pipeline to open and the control switch component on the second cleaning pipeline to close, so that the liquid to be cleaned passes through the bag filter in the first cleaning pipeline for descaling and filtration; when the main controller detects that the pressure difference between the inlet pressure and the outlet pressure is greater than the preset pressure difference threshold, it generates a replacement instruction corresponding to the first cleaning pipeline, and controls the control switch component on the first cleaning pipeline to close, and controls the control switch component on the second cleaning instruction to open, so that the liquid to be cleaned passes through the bag filter in the second cleaning pipeline for descaling and filtration, and reminds the user to replace or clean the bag filter in the first cleaning pipeline.

[0079] Specifically, by installing the pressure sensor on the pipeline, the pressure change of the liquid in the pipeline before and after the bag filter is detected. If the pipeline pressure changes greatly, it means that the liquid in the pipeline encounters pressure resistance and the flow becomes smaller, which means that the impurities in the bag filter have been collected to a certain extent and affected the flow. The test pressure data is automatically displayed on the central control system to facilitate real-time monitoring of the factory, and the pressure difference upper limit of the two pressure sensors (front-rear pressure sensor value) is set according to the experience value after actual use. After exceeding the value, the automatic angle seat valve switches to the other side to work, and the central control prompts the factory operator to clean and check the filter element in time.

[0080] In some optional embodiments, such as Figure 1 As shown, the above sterilizer cleaning liquid recovery device also includes: a top material system 113 and a distribution pipe ( Figure 1 not shown);

[0081] The input end of the top material system 113 is connected to the clean water tank of the in-situ cleaning system, and the output end is connected to the acid solution discharge line 107 and the alkali solution discharge line 108 respectively;

[0082] The distribution pipes are connected to the outlet ends of the acid recovery tank 101 and the alkali recovery tank 102 respectively. A sampling ball valve is provided on the distribution pipe for sampling the liquid in the acid recovery tank 101 or the alkali recovery tank 102.

[0083] Specifically, the above-mentioned ejection system 113 is composed of an ejection line and a control valve provided on the ejection. The control valve is connected to the main controller of the in-situ cleaning system and is controlled by the main controller.

[0084] The embodiment of the utility model utilizes the top material system 113 to be connected to the clean water tank of the on-site cleaning system and the acid liquid discharge line 107 and the alkali liquid discharge line 108 respectively, so that the clean water in the on-site cleaning system can be used to clean the entire sterilizer cleaning liquid recovery device, and the liquid in the acid liquid recovery tank 101 or the alkali liquid recovery tank 102 can be sampled through the distribution pipe and the sampling ball valve, so that the user can understand the quality of the recovered cleaning liquid.

[0085] In some optional embodiments, the acid recovery tank 101 and the alkali recovery tank 102 are both provided with a temperature detection device and a liquid level detection device, and the temperature detection device and the liquid level detection device are both connected to the main controller of the in-situ cleaning system.

[0086] Illustratively, the temperature detection device may be a temperature sensor or other device capable of performing temperature monitoring, and the liquid level detection device may be a liquid level sensor or other device capable of performing liquid level monitoring, but the present invention is not limited thereto.

[0087] In the embodiment of the present utility model, a temperature detection device and a liquid level detection device are provided in the acid recovery tank 101 and the alkali recovery tank 102, and are connected to the main controller of the on-site cleaning system. The main controller can be used to monitor the temperature and liquid level of the recovered cleaning liquid in the acid recovery tank 101 and the alkali recovery tank 102, providing a data basis for subsequent control, which is conducive to improving the degree of automation of the operation of the entire sterilizer cleaning liquid recovery device.

[0088] The embodiment of the present invention also provides a cleaning-in-place system, such as Figure 3 As shown, the in-situ cleaning system includes: a sterilizer 401 and Figure 1 The sterilizer cleaning liquid recovery device 402 is shown.

[0089] The embodiment of the present utility model sets a sterilizer cleaning liquid recovery device in the on-site cleaning system, sets an acid recovery tank 101, an alkali recovery tank 102 and a first filter device 103 and a second filter device 104 which are respectively set in one-to-one correspondence with the acid recovery tank 101 and the alkali recovery tank 102, so as to accurately recover and store the cleaning liquid in the sterilizer that is originally to be discharged to the ground, and connects the two filter devices to the acid addition end and the alkali addition end of the on-site cleaning system, so as to achieve the filtering and recycling of the acid and alkali liquid to the on-site cleaning system for reuse after accurate recovery, thereby avoiding the energy waste caused by direct discharge of the cleaning liquid to the ground. At the same time, the filtration of the filter device ensures that the recovered cleaning liquid meets the use requirements of the acid and alkali liquid of the on-site cleaning system, thereby realizing the automatic recovery of the sterilizer cleaning liquid, further improving the cleaning liquid utilization rate of the entire on-site cleaning system, and achieving energy saving and emission reduction.

[0090] The working principle and working process of the sterilizer cleaning liquid recovery device and the on-site cleaning system provided by the embodiment of the present invention will be described in detail below with reference to specific application examples.

[0091] The sterilizer cleaning liquid recovery device provided by the embodiment of the utility model has the functions of classification, centralized recovery and storage of sterilizer acid and alkali liquid, and has the functions of cleaning liquid filtration, concentration detection and quantitative reuse, such as Figure 1 As shown, the whole includes the following components:

[0092] 1) Acid recovery line 105, connected to the drain valve of the sterilizer cleaning liquid and the acid recovery tank 101, is used to recover the acid originally to be drained from the sterilizer.

[0093] 2) Alkali liquid recovery line 106, connected to the drain valve of the sterilizer cleaning liquid and the alkali liquid recovery tank 102, is used to recover the alkali liquid originally to be drained from the sterilizer.

[0094] 3) Acid recovery tank 101 adopts an insulated tank body to recover the cleaning liquid discharged by the sterilizer. It is equipped with a detachable washing ball, manual slag discharge at the bottom of the tank, and a manhole safety electronic lock. The tank body is equipped with instruments and is monitored by an automated central control system. It is equipped with a temperature sensor to monitor the temperature of the cleaning liquid, and is equipped with high, medium and low liquid level switches and a continuous liquid level sensor to monitor and control the collection and use of the liquid level in the tank.

[0095] 4) Alkali liquid recovery tank 102 adopts an insulated tank body, which is used to recover the cleaning liquid discharged by the sterilizer. It is equipped with a detachable washing ball, manual slag discharge at the bottom of the tank, a manhole safety electronic lock, and the tank body is equipped with instruments and monitored by an automated central control system. It is equipped with a temperature sensor for monitoring the temperature of the cleaning liquid, and is equipped with high, medium and low liquid level switches and a continuous liquid level sensor for monitoring and controlling the collection and use of the liquid level in the tank.

[0096] 5) The acid liquid discharge line 107 can discharge the acid liquid by controlling the switch of the automatic single-seat valve provided on the acid liquid discharge line 107 through the automated central control system.

[0097] 6) The discharge pump adopts a centrifugal pump, and a round-hole stainless steel angle filter is added in front of the pump to protect the discharge pump and prevent solid particles from damaging the discharge pump.

[0098] 7) The first filter device 103 and the second filter device 104; can work continuously, clean and filter impurities in the cleaning liquid in time, and automatically detect and collect precipitation. The operator cleans impurities in time according to the situation; consists of a pressure sensor, a fully automatic angle seat valve, a bag filter with proximity switch monitoring, a drain pan and stainless steel pipes.

[0099] Furthermore, the above-mentioned bag filter is a bag filter with proximity switch monitoring: the filter element adopts a detachable bag filter, which can remove trace fine impurities, up to the micron level, and can intercept more than 95% of impurities in the CIP return liquid visible to the naked eye, compared with the traditional stainless steel hole and stainless steel slit filters. The CIP liquid can pass through the filter and has the advantages of small pressure drop and easy replacement. The material is made of food-grade nylon material, which has the advantage of not being easy to stretch and deform. At the same time, the intersection of the warp and weft is heat-set, which can ensure that the aperture does not deform during the filtration process and can effectively filter Impurities, and can withstand acid, alkali, high temperature and other working conditions of CIP cleaning. The filter housing is made of stainless steel 316L. In terms of design, the top cover adopts a fixed thread + sealing design, which is not only convenient for factory personnel to replace the filter element later, but also installs a proximity switch at the thread, which is associated with the automated central control system of the in-situ cleaning system to protect the safety of operators when changing filter elements. When the operator opens the filter housing, the position of the screw changes, and the proximity switch gives a signal to the automated operating system to lock the automatic angle seat valve of the line and change the side so that no liquid can flow, to prevent the cleaning fluid from spraying out of the filter housing, causing a threat to personnel safety.

[0100] Fully automatic angle seat valve: Compared with other valves, it has outstanding anti-water hammer performance and can effectively deal with the water hammer phenomenon that often occurs in the CIP system, ensuring the safety of the entire system.

[0101] Pressure sensor: The sensor is installed on the pipeline to detect the pressure change of the liquid in the pipeline before and after the filter. If the pipeline pressure changes greatly, it means that the liquid in the pipeline encounters pressure resistance and the flow rate becomes smaller, indicating that the impurities in the bag filter have been collected to a certain extent and affected the flow rate. The test pressure data is automatically displayed on the central control system to facilitate real-time monitoring of the factory, and the upper limit of the pressure difference between the two pressure sensors (front-rear pressure sensor value) is set according to the experience value after actual use. After exceeding the value, the automatic angle seat valve switches to the other side to work, and the central control prompts the factory operator to clean and check the filter element in time.

[0102] 8) The alkali solution discharging line 108 can discharge the alkali solution by controlling the switch of the automatic single-seat valve provided on the alkali solution discharging line 108 through the automated central control system.

[0103] 9) The first steering control valve group 111 and the second steering control valve group 112 are used for automatic switching between automatic cleaning and recovery of the acid recovery tank 101 and the alkali recovery tank 102;

[0104] 10) The metering system is connected to the automated central control system and equipped with an electromagnetic flowmeter and a conductivity meter. Based on the needs of the CIP station before sterilization, the central control system calculates the flowmeter to control the centrifugal pump and the conductivity to measure the cleaning liquid concentration, and replenishes the CIP system before sterilization in a quantitative, quality-guaranteed and accurate manner.

[0105] 11) The jacking system 113 has the following functions: function 1: jacking pipes, using the sterilized CIP station to use its clean water to push out the cleaning liquid on the discharge line; function 2: it can be used to clean the discharge line + recovery tank equipment to ensure the safe operation of the entire system.

[0106] 12) The distribution pipe and the end manual sampling ball valve are used to connect the corresponding recovery tank and the cleaning line, supply the cleaning liquid to the cleaning line, and the operating inspection personnel manually sample the cleaning liquid at the end of the distribution pipe, regularly test the cleaning liquid, and calibrate the conductivity meter (concentration).

[0107] 13) Alkali cleaning inlet line 109 and acid cleaning inlet line 110 supply the corresponding cleaning liquid to the acid and alkali recovery tanks of the CIP station after sterilization.

[0108] The automated central control system and hardware system of the cleaning-in-place system, namely the master controller mentioned above, completes the three major functions of intelligent detection, filtering, and adding, realizing the three major functions of intelligent monitoring, safety, and reuse. Specifically, it includes but is not limited to the following functions:

[0109] 1. Through turbidity and online concentration detection, the acid and alkali recovered by the sterilizer are intelligently analyzed in the central control. The cleaning operation of the sterilizer is analyzed through the impurity situation to form a dynamic analysis curve to further optimize the operation and cleaning of the sterilizer.

[0110] 2. Upgrade the scope of application, not only recycling the sterilizer, but also regularly filter all cleaning fluids (single-machine cleaning, CIP station), equipped with a nanofiltration-level membrane filtration system (accuracy can reach 0.002-0.05μm), which can fully filter impurities and remove 100% of impurities while retaining the effective ingredients of the cleaning agent, achieving zero discharge of the cleaning fluid. It can not only make full use of the cleaning agent and increase its utilization rate, but also eliminate discharge, ensure the safety of the entire cleaning system, save cleaning costs, and reduce the discharge pressure of the sewage treatment plant.

[0111] For example, the sterilizer cleaning fluid recovery device is used to recover acid and alkaline cleaning fluids from a dairy pasteurizer, replenishing the target CIP station before pasteurization. The device has two operating modes: operating and cleaning. In the operating mode, the entire device is used to recover, centrally store, and filter cleaning fluids, and reuse them for quantitative addition to the CIP station before sterilization. In the cleaning mode, the post-sterilization CIP station cleaning fluid is used to clean the recovery tank and discharge line, achieving comprehensive cleaning of the entire device and ensuring its sanitation and safety.

[0112] 1. Working status - recovery, filtration, metering and addition

[0113] In the first step, taking the recovery of alkali solution as an example, the cleaning liquid (alkali solution) of the sterilizer is discharged from the sterilizer discharge valve (the valve is provided with the sterilizer equipment) through the sterilizer alkali solution recovery line 106 and enters the alkali solution recovery tank 102. The CIP station before sterilization issues a liquid replenishment request to the central control system. The recovered alkali solution passes through the alkali solution discharge line 108 through the distribution pipe. The discharge pump provides power and is filtered through a bag filter to remove more than 90% of impurities. The discharge pump is controlled by the metering system and transported to the CIP station before sterilization in a quantitative and quality-assured manner (ensuring effective concentration).

[0114] In the second step, taking the recovery of alkali liquor as an example, the alkali liquor and clean water from the CIP station after the sterilizer are periodically (according to the production situation of the sterilizer) transported to the CIP station before the sterilizer through the top feeding line of the top feeding system 113, the alkali liquor discharge line 108, and the bag filter, and the discharge pump is controlled by the metering system.

[0115] Cleaning status-Equipment self-cleaning

[0116] Compared with the discharge line, the tank body is more prone to accumulation and sedimentation, and the cleaning frequencies of the two are inconsistent. They need to be cleaned separately in the design. This can more efficiently ensure the operational safety and equipment cleanliness of the entire system and ensure the safety of the cleaning of the entire CIP system.

[0117] The first type of tank cleaning involves cleaning the alkali recovery tank 102. This tank 102 requires acid cleaning. Acid from the post-sterilization CIP station enters the tank 102 through the cleaning inlet line. Once the acid reaches a certain level, it flows through a distribution pipe, the alkali discharge line 108, and then through the diversion control valve assembly to the alkali recovery line 106, forming a cleaning cycle for the tank and line. The metering system controls the discharge pump (inverter) to effectively clean the tank based on the calculated cleaning flow rate.

[0118] The second type of cleaning line: Taking the cleaning alkali discharge line as an example, the acid liquid from the post-sterilization CIP station is returned to the pre-sterilization CIP station through the top-feeding line in the top-feeding system 113, through the alkali liquid discharge line 108, and is discharged to the ground using its discharge valve before entering the pre-sterilization CIP alkali tank.

[0119] The sterilizer cleaning fluid recovery device can complete the classified recovery of acids and alkalis, perform online continuous impurity removal, and intelligently quantitatively add acids and alkalis according to addition needs. Compared with the previous practice of discharging sterilizer cleaning fluid once, this can reduce the cleaning costs of the entire factory, reduce the burden on the sewage treatment plant, and effectively recover water and heat, thereby saving energy and reducing consumption. The entire system is self-cleaning, effectively ensuring safe operation. It also uses an excellent uninterrupted filtration device to ensure the safety of cleaning fluid filtration and addition. The use of a bag filter device compensates for the high impurity content of recycled cleaning fluid. Micron-level filtration can remove more than 90% of impurities and can operate continuously. A pressure detection device detects the pressure difference before and after the bag filter to automatically determine the impurity collection status and switch to the other side to maintain normal operation of the filtration device. It also reminds the operator to replace the inactive filter and discharge the residue. The safety protection measure is equipped with a proximity switch linked to the central control system to prevent personnel safety risks and reduce the microbial risks of the entire CIP system.

[0120] Compared with traditional cleaning liquid recovery solutions, the sterilizer cleaning liquid recovery device provided by the utility model can complete functions such as classification, collection, caching, detection, filtration, and quantitative addition through an integrated modular design, thereby realizing the reuse of cleaning liquid, reducing waste, and lowering costs. In addition, the system is equipped with a self-cleaning function to achieve no dead angles, thereby ensuring the safety of the entire system and the quality of addition. It also ensures the safety of cleaning liquid filtration and the safety of addition through the use of a good uninterrupted online filtration device. It can realize the intelligent addition function, and through the conductivity meter, flow meter, centrifugal pump and automation program, according to the replenishment needs, after detecting the effective concentration, the automation program intelligently converts it into the addition amount, and the flow meter controls the quantitative delivery of the centrifugal pump.

[0121] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A sterilizer cleaning liquid recovery device, used in a cleaning-in-place system, characterized in that: The device comprises: an acid recovery tank, an alkali recovery tank, and a first filter device and a second filter device respectively arranged in one-to-one correspondence with the acid recovery tank and the alkali recovery tank; The inlet ends of the acid recovery tank and the alkali recovery tank are connected to the drain valve of the sterilizer through the acid recovery line and the alkali recovery line respectively; The outlet ends of the acid recovery tank and the alkali recovery tank are connected to the acid addition end and the alkali addition end of the in-situ cleaning system through the first filtering device and the second filtering device respectively.

2. The sterilizer cleaning liquid recovery device according to claim 1, characterized in that: The sterilizer cleaning liquid recovery device further comprises: an acid liquid discharge line and an alkali liquid discharge line; The acid liquid recovery tank is connected to the first filtering device through the acid liquid discharge line, and the acid liquid discharge line is provided with a first discharge pump; The alkali solution recovery tank is connected to the second filtering device through the alkali solution discharge line, and a second discharge pump is provided on the alkali solution discharge line.

3. The sterilizer cleaning liquid recovery device according to claim 1, characterized in that: The inlet end of the acid recovery tank is connected to the alkali tank of the in-situ cleaning system through an alkali cleaning inlet line; The inlet end of the alkali solution recovery tank is connected to the acid tank of the on-site cleaning system through an acid solution cleaning inlet line.

4. The sterilizer cleaning liquid recovery device according to claim 3, characterized in that: The sterilizer cleaning liquid recovery device further includes: a first steering control valve group and a second steering control valve group; The first filter device is connected to the input end of the first steering control valve group, and the output end of the first steering control valve group is connected to the acid addition end of the in-situ cleaning system and the acid recovery line respectively; The second filtering device is connected to the input end of the second steering control valve group, and the output end of the second steering control valve group is connected to the alkali solution addition end of the in-situ cleaning system and the alkali solution recovery line respectively.

5. The sterilizer cleaning liquid recovery device according to claim 1, characterized in that: The first filter device and the second filter device both include: a pressure detection device and two cleaning pipelines, wherein: Each cleaning pipeline is provided with a bag filter and a control switch assembly, the control switch assembly is used to control the on and off of the cleaning pipeline, and the bag filter is detachably provided on the cleaning pipeline; The pressure detection device is used to respectively collect the inlet pressure and outlet pressure of the cleaning pipeline, and send the inlet pressure and outlet pressure to the main controller of the in-situ cleaning system; The master controller controls the actions of corresponding control switch components on the two cleaning pipelines by comparing the inlet end pressure and the outlet end pressure, and issues a bag filter replacement prompt.

6. The sterilizer cleaning liquid recovery device according to claim 5, characterized in that: The pressure detection device includes: a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged at the inlet end of the cleaning pipeline, and the second pressure sensor is arranged at the outlet end of the cleaning pipeline; And / or, the control switch assembly includes: fully automatic angle seat valves respectively arranged at both ends of the bag filter, and the fully automatic angle seat valves are used to control the flow or shutoff of the cleaning pipeline.

7. The sterilizer cleaning liquid recovery device according to claim 5, characterized in that: The first filtering device and the second filtering device each further include: A water receiving tray and a drain valve are provided on each cleaning pipeline. The water receiving tray is provided below the bag filter and the drain valve and is used to hold liquid discharged through the drain valve or liquid discharged when the bag filter is disassembled.

8. The sterilizer cleaning liquid recovery device according to claim 2, characterized in that: The sterilizer cleaning liquid recovery device also includes: a top material system and a distribution pipe; The input end of the top material system is connected to the clean water tank of the in-situ cleaning system, and the output end is connected to the acid solution discharge line and the alkali solution discharge line respectively; The distribution pipe is connected to the outlet ends of the acid recovery tank and the alkali recovery tank respectively. A sampling ball valve is provided on the distribution pipe, and the sampling ball valve is used to sample the liquid in the acid recovery tank or the alkali recovery tank.

9. The sterilizer cleaning liquid recovery device according to any one of claims 1 to 8, characterized in that: The acid solution recovery tank and the alkali solution recovery tank are both provided with a temperature detection device and a liquid level detection device, and the temperature detection device and the liquid level detection device are both connected to the main controller of the in-situ cleaning system.

10. A cleaning-in-place system, characterized in that: The in-situ cleaning system comprises: a sterilizer and a sterilizer cleaning liquid recovery device according to any one of claims 1 to 9.

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