A high-efficiency heat recovery CIP automatic cleaning system

Abstract

This utility model belongs to the field of equipment cleaning technology, specifically disclosing a high-efficiency heat recovery CIP automatic cleaning system, including a tank to be cleaned, a clean water tank, a hot water tank, an acid tank, an alkali tank, a steam condensate recovery tank, a plate heat exchanger, a recovery system, and a water tank. The outlet of the water tank is connected to the inlet of the clean water tank and the hot water tank, respectively. The steam condensate recovery tank is connected to the inlet of the hot water tank via a pipeline through the plate heat exchanger. The first and second outlets of the hot water tank are connected to the inlets of the acid tank and the alkali tank, respectively. The third outlet of the clean water tank and the hot water tank, as well as the outlets of the acid tank and the alkali tank, are all connected to the inlet of the tank to be cleaned. The outlet of the tank to be cleaned is connected to the inlets of the clean water tank, the hot water tank, the acid tank, and the alkali tank via a pipeline through the recovery system, respectively. Each tank outlet is equipped with a pipe valve. This utility model can improve the heat utilization efficiency of the CIP cleaning system and save heat resources. This utility model is applicable to CIP cleaning systems.

Description

Technical Field

[0001] This utility model belongs to the field of equipment cleaning technology and relates to a high-efficiency heat recovery CIP automatic cleaning system. Background Technology

[0002] CIP cleaning, also known as positional cleaning, is a method that uses high-temperature, high-concentration cleaning solutions to powerfully clean equipment and remove deposits adhering to the inner walls of equipment and pipes without disassembling or moving the production equipment.

[0003] In dairy production, a five-step process is typically used for Clean In-Process (CIP) cleaning of processing pipelines. This includes pre-rinsing with clean water, alkali rinsing, cleaning water rinsing, acid rinsing, hot water rinsing, and clean water rinsing. The entire CIP cleaning system comprises a water supply tank, a hot water tank, an acid tank, an alkali tank, and a clean water tank. Temperature control of the cleaning solution is crucial for CIP operation. For example, the temperature of the alkali or acid solution is generally set between 60℃ and 80℃ to ensure cleaning effectiveness. Therefore, both the acid and alkali tanks have heating equipment to heat the cleaning solution.

[0004] In existing CIP cleaning systems, a water tank supplies water to hot water tanks, acid tanks, alkali tanks, and clean water tanks. Each of these tanks heats the water supplied by the water tank before performing the cleaning process. Besides normal replenishment, some water flows from a steam condensate recovery tank through a plate heat exchanger into the water tank. Since the temperature of the water supplied to the water tank is generally around 20 degrees Celsius, and the condensate temperature is typically maintained between 95°C and 120°C, the low-temperature water supplied by the water tank needs to be reheated to 60°C-80°C. However, the high-temperature condensate, after recovery, is not preferentially used for the heating process, resulting in heat loss during cooling and reheating, leading to significant heat waste. Therefore, improvements to the existing condensate recovery and CIP systems are needed to provide a highly efficient heat recovery CIP automated cleaning system. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency heat recovery CIP automatic cleaning system. This invention transfers condensate to a hot water tank, and then supplies water to the acid and alkali tanks through the hot water tank, which greatly improves heat utilization efficiency and saves heat resources.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-efficiency heat recovery CIP automatic cleaning system includes a tank to be cleaned, a clean water tank, a hot water tank, an acid tank, an alkali tank, and a water tank. The outlet of the water tank is connected to the inlet of the clean water tank and the inlet of the hot water tank, respectively. It also includes a steam condensate recovery tank, a plate heat exchanger, and a recovery system. The steam condensate recovery tank is connected to the inlet of the hot water tank via a pipeline through a plate heat exchanger. The first and second outlets of the hot water tank are connected to the inlets of the acid tank and the alkali tank, respectively. The third outlet of the clean water tank, the hot water tank, the acid tank, and the alkali tank are all connected to the inlet of the tank to be cleaned. The outlet of the water tank, the outlet of the plate heat exchanger, the outlet of the clean water tank, the first outlet of the hot water tank, the second outlet of the hot water tank, the third outlet of the hot water tank, the outlet of the acid tank, and the outlet of the alkali tank are all equipped with pipe valves. The outlet of the tank to be cleaned is connected to the inlet of the clean water tank, hot water tank, acid tank, and alkali tank respectively through pipelines and a recycling system.

[0007] As a limitation, the recycling system includes an acid recycling tank, an alkali recycling tank, and a water recycling tank; The outlet of the tank to be cleaned is connected to the inlet of the acid recovery tank, the alkali recovery tank, and the water recovery tank, respectively. The outlet of the acid recovery tank is connected to the inlet of the acid liquid tank, the outlet of the alkali recovery tank is connected to the inlet of the alkali liquid tank, the first outlet of the water recovery tank is connected to the inlet of the hot water tank, and the second outlet of the water recovery tank is connected to the inlet of the clean water tank. The inlet and outlet of the acid recovery tank, the inlet and outlet of the alkali recovery tank, and the inlet, first outlet, and second outlet of the water recovery tank are all equipped with pipe valves.

[0008] As a second limitation, the hot water tank is provided with a heating device on its pipe wall; a temperature sensor is also provided on the hot water tank.

[0009] As a third limitation, a liquid level sensor, a temperature sensor, and a pH sensor are respectively installed on the alkali tank and the acid tank.

[0010] As a further limitation, a filtration device is provided between the outlet of the acid recovery tank and the inlet of the acid tank; A filtration device is also provided between the outlet of the alkali recovery tank and the inlet of the alkali solution tank.

[0011] As a fourth limitation, the steam condensate recovery tank, hot water tank, acid tank, and alkali tank are all equipped with a heat insulation layer.

[0012] The technological advancements achieved by this invention compared to existing technologies, due to the adoption of the aforementioned technical solution, are as follows: (1) This utility model directly feeds steam condensate into the hot water tank via a plate heat exchanger, avoiding the waste of heat energy from repeated heating after the condensate is cooled, significantly improving the efficiency of heat energy utilization, and reducing energy consumption and operating costs. (2) This utility model eliminates the independent heating devices for acid tank and alkali tank, and instead uses a hot water tank for unified heating. By centrally heating the hot water tank and using the preheated hot water to supply the acid and alkali tanks, the energy loss from repeated heating is significantly reduced, and the system thermal efficiency is improved. Secondly, eliminating the heating device simplifies the equipment structure, reduces the maintenance cost of heating elements, and avoids the risk of local overheating. In addition, unified temperature control can more accurately maintain the acid and alkali solutions in the optimal cleaning temperature range of 60-80℃, which not only ensures the cleaning effect but also prevents energy waste, achieving the dual optimization of cascade utilization of thermal energy and equipment intensification. (3) This utility model uses independent pipelines to divert waste acid, waste alkali and rinsing water to the corresponding recovery tanks, which avoids cross-contamination and ineffective losses caused by neutralization of acid and alkali substances. It can also filter the recovered acid and alkali and reinject it into the original storage tank for reuse, reducing chemical consumption. At the same time, the recovery water tank will classify the water. High-temperature rinsing water will be given priority to the hot water tank to save heat energy, while ordinary rinsing water will be returned to the clean water tank for secondary use, which will improve the comprehensive utilization rate of water resources and significantly reduce operating costs while reducing hazardous waste discharge. (4) The heating device and temperature sensor on the hot water tank in this utility model form a double insurance, which not only retains the advantage of utilizing the residual heat of condensation, but also accurately adjusts the water supply temperature to ensure that the acid and alkali tank obtains a stable heat source. (5) The liquid level, temperature and pH value sensor group configured in the acid tank and alkali tank of this utility model can monitor the solution status in real time and automatically compensate for the loss, so that the cleaning parameters are always maintained within the process standard range, significantly improving the cleaning consistency. (6) In this utility model, a heat insulation layer is added to the steam condensate recovery tank, hot water tank, acid tank and alkali tank. By effectively blocking heat loss, the stable delivery of high temperature condensate and cleaning medium is ensured. At the same time, the stable temperature can suppress the risk of equipment corrosion and crystallization. Combined with the pH value sensor for coordinated control, the overall efficiency of the heat recovery system can be significantly improved, forming a closed-loop heat management network that combines energy saving and consumption reduction with process reliability.

[0013] This invention belongs to the field of equipment cleaning technology. It transfers condensate to a hot water tank, and then supplies water to the acid and alkali tanks through the hot water tank, which greatly improves heat utilization efficiency and saves heat resources. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the system composition according to an embodiment of the present utility model.

[0016] In the diagram: 1. Water tank, 2. Steam condensate recovery tank, 3. Plate heat exchanger, 4. Clean water tank, 5. Hot water tank, 6. Acid tank, 7. Alkali tank, 8. Tank to be cleaned, 9. Alkali recovery tank, 10. Acid recovery tank, 11. Water recovery tank, 12. Filtration device. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example like Figure 1 As shown, this embodiment is a high-efficiency heat recovery CIP automatic cleaning system, including a tank to be cleaned 8, a clean water tank 4, a hot water tank 5, an acid tank 6, an alkali tank 7, a steam condensate recovery tank 2, a plate heat exchanger 3, a recovery system, and a water tank 1. The recovery system includes an acid recovery tank 10, an alkali recovery tank 9, and a water recovery tank 11.

[0019] The outlet of water tank 1 is connected to the inlet of clean water tank 4 and hot water tank 5 respectively. Steam condensate recovery tank 2 is connected to the inlet of hot water tank 5 through a pipe and a plate heat exchanger 3.

[0020] The first and second outlets of the hot water tank 5 are connected to the inlets of the acid tank 6 and the alkali tank 7, respectively. The third outlet of the clean water tank 4 and the hot water tank 5, as well as the outlets of the acid tank 6 and the alkali tank 7, are all connected to the inlet of the tank 8 to be cleaned.

[0021] The outlet of the tank to be cleaned 8 is connected to the inlet of the acid recovery tank 10, the alkali recovery tank 9, and the water recovery tank 11, respectively. The outlet of the acid recovery tank 10 is connected to the inlet of the acid liquid tank 6, the outlet of the alkali recovery tank 9 is connected to the inlet of the alkali liquid tank 7, the first outlet of the water recovery tank 11 is connected to the inlet of the hot water tank 5, and the second outlet of the water recovery tank 11 is connected to the inlet of the clean water tank 4.

[0022] Pipe valves are provided at the outlet of water tank 1, the outlet of plate heat exchanger 3, the outlet of clean water tank 4, the first outlet of hot water tank 5, the second outlet of hot water tank 5, the third outlet of hot water tank 5, the outlet of acid tank 6, the outlet of alkali tank 7, the inlet and outlet of acid recovery tank 10, the inlet and outlet of alkali recovery tank 9, and the inlet, first outlet and second outlet of water recovery tank 11.

[0023] A heating device is installed on the pipe wall of the hot water tank 5 to heat the water in the hot water tank 5. A temperature sensor is also installed on the hot water tank 5 to facilitate temperature control.

[0024] A level sensor, a temperature sensor, and a pH sensor are respectively installed on the alkali tank 7 and the acid tank 6. The level sensor is used to monitor the solution levels in the alkali tank 7 and the acid tank 6 in real time and automatically replenish the solution to prevent dry burning or overflow; the temperature sensor ensures that the alkali and acid solutions are at the optimal cleaning temperature through constant temperature regulation; the pH sensor dynamically monitors the acid and alkali concentrations and links with the replenishment pump to maintain an effective cleaning ratio. The three types of sensors work together to ensure cleaning efficiency and safety.

[0025] A filter device 12 is installed between the outlet of the acid recovery tank 10 and the inlet of the acid liquid tank 6, and between the outlet of the alkali recovery tank 9 and the inlet of the alkali liquid tank 7. The filter device 12 can intercept particulate impurities in the recovery liquid, such as pipe corrosion and residual dirt, to avoid secondary contamination of the cleaning liquid; at the same time, it protects key equipment such as pumps and valves from wear and extends their service life.

[0026] To further enhance the heat utilization rate of this embodiment, thermal insulation layers are provided on the steam condensate recovery tank 2, hot water tank 5, acid tank 6, and alkali tank 7.

[0027] In this embodiment, during use, water tank 1 provides cold water at approximately 20°C, a portion of which flows directly into clean water tank 4 for later use. The high-temperature condensate of 95°C-120°C from steam condensate recovery tank 2 undergoes heat exchange in plate heat exchanger 3, and then enters hot water tank 5. If the condensate in steam condensate recovery tank 2 is insufficient, water tank 1 can also directly supply water to hot water tank 5.

[0028] Hot water tank 5 heats water via a built-in heating device under the control of a temperature sensor. After heating, the water is distributed from three outlets: the first outlet supplies acid solution tank 6 for preparing pickling solution, the second outlet supplies alkali solution tank 7 for preparing alkaline solution, and the third outlet serves directly as the hot water source for cleaning. Acid solution tank 6 and alkali solution tank 7 maintain the optimal temperature of the cleaning solution via temperature sensors, pH sensors dynamically adjust the acid and alkali concentrations, and level sensors activate a replenishment pump to prevent dry burning or overflow.

[0029] The cleaning process employs a five-step method: pre-rinse with clean water, rinse with alkaline solution, rinse with cleaning water, rinse with acid solution, rinse with hot water, and rinse with clean water. First, the tank to be cleaned, 8, is pre-rinsed with clean water using water from tank 4. Then, it undergoes alkaline washing with hot alkaline solution from tank 7. Next, residual alkaline solution is rinsed off with water from tank 4. The next step is acid washing with hot acid solution from tank 6. Finally, the tank is thoroughly rinsed and sterilized with hot water from tank 5, followed by a final rinse with clean water to recover the hot water.

[0030] The outlet liquid of the tank to be cleaned 8 is diverted according to its composition: pickling waste liquid enters the acid recovery tank 10, alkaline waste liquid enters the alkali recovery tank 9, and rinsing wastewater enters the water recovery tank 11. The liquid flow type is automatically switched by a valve. The liquids from the acid recovery tank 10 and the alkali recovery tank 9 are filtered by the outlet filter device 12 to remove rust and particulate impurities, and then returned to the acid tank 6 and the alkali tank 7 for reuse, reducing the consumption of new liquid. The water from the water recovery tank 11 is divided into two paths: the water from the first outlet of the water recovery tank 11 is used to supplement the hot water tank 5, and the water from the second outlet of the water recovery tank 11 is used to supplement the clean water tank 4 for pre-rinsing, realizing the cascade utilization of water and heat. The thermal insulation layers of the steam condensate recovery tank 2, the hot water tank 5, the acid tank 6, and the alkali tank 7 can further reduce the system's heat loss.

[0031] In summary, this embodiment transfers the condensate to the hot water tank 5, and then supplies water to the acid tank 6 and the alkali tank 7 through the hot water tank 5, which greatly improves the heat utilization efficiency and saves heat resources.

Claims

1. A high-efficiency heat recovery CIP automatic cleaning system, comprising a tank to be cleaned, a clean water tank, a hot water tank, an acid tank, an alkali tank, and a water tank, wherein the outlet of the water tank is connected to the inlet of the clean water tank and the inlet of the hot water tank, respectively, characterized in that, It also includes steam condensate recovery tanks, plate heat exchangers, and recovery systems; The steam condensate recovery tank is connected to the inlet of the hot water tank via a pipeline through a plate heat exchanger. The first and second outlets of the hot water tank are connected to the inlets of the acid tank and the alkali tank, respectively. The third outlet of the clean water tank, the hot water tank, the acid tank, and the alkali tank are all connected to the inlet of the tank to be cleaned. The outlet of the water tank, the outlet of the plate heat exchanger, the outlet of the clean water tank, the first outlet of the hot water tank, the second outlet of the hot water tank, the third outlet of the hot water tank, the outlet of the acid tank, and the outlet of the alkali tank are all equipped with pipe valves. The outlet of the tank to be cleaned is connected to the inlet of the clean water tank, hot water tank, acid tank, and alkali tank respectively through pipelines and a recycling system.

2. The high-efficiency heat recovery CIP automatic cleaning system according to claim 1, characterized in that, The recycling system includes an acid recycling tank, an alkali recycling tank, and a water recycling tank; The outlet of the tank to be cleaned is connected to the inlet of the acid recovery tank, the alkali recovery tank, and the water recovery tank, respectively. The outlet of the acid recovery tank is connected to the inlet of the acid liquid tank, the outlet of the alkali recovery tank is connected to the inlet of the alkali liquid tank, the first outlet of the water recovery tank is connected to the inlet of the hot water tank, and the second outlet of the water recovery tank is connected to the inlet of the clean water tank. The inlet and outlet of the acid recovery tank, the inlet and outlet of the alkali recovery tank, and the inlet, first outlet, and second outlet of the water recovery tank are all equipped with pipe valves.

3. The high-efficiency heat recovery CIP automatic cleaning system according to claim 1 or 2, characterized in that, The hot water tank is equipped with a heating device on its pipe wall; a temperature sensor is also installed on the hot water tank.

4. A high-efficiency heat recovery CIP automatic cleaning system according to claim 1 or 2, characterized in that, A liquid level sensor, a temperature sensor, and a pH sensor are respectively installed on the alkali tank and the acid tank.

5. The high-efficiency heat recovery CIP automatic cleaning system according to claim 2, characterized in that, A filtration device is provided between the outlet of the acid recovery tank and the inlet of the acid tank; A filtration device is provided between the outlet of the alkali recovery tank and the inlet of the alkali solution tank.

6. A high-efficiency heat recovery CIP automatic cleaning system according to claim 1 or 2, characterized in that, The steam condensate recovery tank, hot water tank, acid tank, and alkali tank are all equipped with heat insulation layers.

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