A flexible energy-saving vacuum rehumidification machine cooling water circulation system

Abstract

The present invention relates to a flexible energy-saving vacuum dehumidification machine cooling water circulation system, wherein a cooling circulation water tank is divided into a hot water chamber and a cooling water chamber connected at the bottom by a partition; the water outlet of the vacuum dehumidification machine is connected to the hot water chamber through a pipeline; the hot water chamber is connected to the inlet of a cooling water tower through a first circulation water pump; the outlet of the cooling water tower is connected to the cooling water chamber through a pipeline; the cooling water chamber is connected to the water inlet of the vacuum dehumidification machine through a second circulation water pump. This technology avoids direct contact between hot water and cold water by dividing the cooling circulation water tank into a hot water chamber and a cooling water chamber; adds a set of independent cooling water self-circulation pipelines, so that the cooling water in the cooling circulation water tank can be circulated and cooled uninterruptedly, and adds energy-saving and consumption-reducing design, and installs a temperature sensor at the inlet of the circulation water pump, which can achieve the purpose of energy saving and consumption reduction while ensuring that the cooling water temperature is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum rehumidification equipment auxiliary equipment of a tobacco silk production line, and particularly relates to a cooling water circulation system of a flexible energy-saving vacuum rehumidification machine. Background Art

[0002] Vacuum moisture recovery equipment is mainly used in tobacco leaf production line, which is a major process of tobacco leaf pretreatment. The working process of the existing vacuum moisture recovery equipment cooling water circulation system is as follows: Figure 1 As shown, the hot water discharged from the vacuum rehumidification equipment 01 enters the cooling water tower 02 for cooling, and the cooled water flows into the cooling circulating water tank 03, and is then pumped into the vacuum rehumidification equipment by the circulating water pump 04.

[0003] During the production process, the existing cooling water circulation system has a low cooling efficiency. As a result, when the vacuum rehumidification equipment works continuously in summer, the pumping time is often prolonged due to the high cooling water temperature, and the steam consumption increases significantly. In severe cases, the high cooling water temperature may cause the subsequent process to be cut off due to long-term pumping, affecting the production efficiency of the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a flexible energy-saving vacuum rehumidification machine cooling water circulation system to solve the problem that the cooling efficiency of the cooling water circulation mode in the prior art is low, which affects the production efficiency of the vacuum rehumidification equipment.

[0005] The present invention is achieved through the following technical solutions:

[0006] A flexible energy-saving vacuum dehumidification machine cooling water circulation system, comprising a vacuum dehumidification machine, a cooling water tower, a first circulating water pump, a second circulating water pump, a cooling circulating water tank, a temperature sensor and a processor;

[0007] A partition is provided in the cooling circulation water tank to separate the cooling circulation water tank into a hot water chamber and a cooling water chamber which are connected at the bottom, a hot water outlet is provided at the side of the hot water chamber, and a cooling water outlet is provided at the bottom of the cooling water chamber;

[0008] The water outlet of the vacuum rehumidifier is connected to the top of the hot water chamber through the first pipeline; the hot water outlet on the side of the hot water chamber is connected to the inlet of the first circulating water pump through the second pipeline, and the outlet of the first circulating water pump is connected to the inlet of the cooling water tower through the third pipeline;

[0009] The outlet of the cooling water tower is connected to the top of the cooling water chamber through the fourth pipeline; the cooling water outlet at the bottom of the cooling water chamber is connected to the inlet of the second circulating water pump through the fifth pipeline, and the outlet of the second circulating water pump is connected to the water inlet of the vacuum rehumidification machine through the sixth pipeline;

[0010] Temperature sensors are provided at the inlet of the first circulating water pump, the inlet of the second circulating water pump, the hot water chamber and the cooling water chamber; the processor is respectively connected to the temperature sensor, the first circulating water pump and the second circulating water pump via electrical signals.

[0011] The hot water outlet on the side of the hot water chamber is arranged at the middle position of the liquid level, and the outlet of the first pipeline above the hot water chamber is located above the center of the hot water chamber.

[0012] The outlet of the fourth pipeline is close to the partition, and the cooling water outlet at the bottom of the cooling water chamber is arranged on a side of the center of the cooling water chamber away from the partition.

[0013] The volume of the hot water chamber is smaller than the volume of the cooling water chamber.

[0014] The fan controller of the cooling water tower is connected with the processor via electrical signals.

[0015] The beneficial effects of the present invention are:

[0016] This technology avoids direct contact between hot water and cold water by dividing the cooling circulating water tank into a hot water chamber and a cooling water chamber; adds a set of independent cooling water self-circulation pipelines, so that the cooling water in the cooling circulating water tank can be circulated and cooled uninterruptedly, and adds energy-saving and consumption-reducing design, and installs a temperature sensor at the inlet of the circulating water pump, which can achieve the purpose of energy saving and consumption reduction while ensuring that the cooling water temperature is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the current vacuum rehumidification cooling water circulation pipeline;

[0018] Figure 2 This is a schematic diagram of the vacuum rehumidification cooling water circulation pipeline of the present invention;

[0019] Figure 3 This is a schematic diagram of the cooling circulating water tank segmentation of the present invention;

[0020] Figure 4 It is a schematic diagram of the vacuum rehumidification drainage pipeline of the present invention.

[0021] Description of Reference Numerals

[0022] 01 vacuum rehumidification machine, 02 cooling water tower, 03 cooling circulating water tank, 04 circulating water pump, 1 vacuum rehumidification equipment, 2 cooling water tower, 3 cooling circulating water tank, 31 partition, 32 cooling water chamber, 33 hot water chamber, 4 first circulating water pump, 5 second circulating water pump, 6 first pipeline, 7 third pipeline, 8 fourth pipeline, 9 fifth pipeline, 10 sixth pipeline. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be construed as limiting the technical solution of the present invention.

[0024] like Figures 2 to 4 As shown, the present application provides a flexible energy-saving vacuum dehumidification machine cooling water circulation system, including a vacuum dehumidification machine 1, a cooling water tower 2, a first circulating water pump 4, a second circulating water pump 5, a cooling circulating water tank 3, a temperature sensor and a processor.

[0025] In the technical solution of the present application, the vacuum moisture conditioning machine is the prior art and has not been improved in the technical solution of the present application. Therefore, in the technical solution of the present application, the vacuum moisture conditioning machine is not described. The vacuum moisture conditioning machine is provided with a water inlet for entering the cooled cooling water and a water outlet for discharging the heated cooling water.

[0026] A partition 31 is provided in the cooling circulation water tank 3, which divides the cooling circulation water tank into a hot water chamber 33 and a cooling water chamber 32 which are connected at the bottom. The volume of the cooling water chamber is larger than that of the hot water chamber. A hot water outlet is provided at the side of the hot water chamber, and a cooling water outlet is provided at the bottom of the cooling water chamber. In the technical solution of the present application, the improvement of the cooling circulation water tank is the key technology of the present application. Figure 1 As shown, the hot water discharged from the vacuum dehumidification machine is directly pumped into the cooling water tower, and the hot cooling water is completely cooled before entering the cooling circulation water tank. This situation is not a big problem in spring and autumn, but in winter, the temperature of the external environment is low. After all the heated cooling water is cooled by the cooling water tower, the cooling water temperature will be too low, affecting the working efficiency of the vacuum dehumidification machine, and the use of the cooling water tower increases energy consumption. In summer, all the heated cooling water enters the cooling water tower for cooling. Combined with the high temperature of the external environment, the cooling efficiency of the cooling water tower cannot meet the cooling needs, which will seriously affect the normal operation of the vacuum dehumidification machine. On the other hand, the cooling water tower and the cooling circulation water tank of the entire cooling water circulation system are affected by the external environment temperature, and the external environment temperature changes irregularly, resulting in unstable cooling water temperature, which in turn affects the stable production of the vacuum dehumidification machine, causing the moisture content of the tobacco to fluctuate, affecting the quality of the tobacco.

[0027] This technical solution sets a baffle in the cooling circulating water tank, and the heated cooling water discharged from the vacuum rehumidifier first enters the hot water chamber. The volume in the hot water chamber is much larger than the amount of water pumped from the hot water chamber to the cooling water tower by the circulating water pump. Therefore, the heated cooling water first achieves a balance of water volume and a balance of cooling water temperature over a long period of time in the hot water chamber, ensuring that the temperature fluctuation of the hot cooling water going to the cooling water tower is reduced. Secondly, the temperature of the heated cooling water is higher than the temperature of the external environment even in summer. The hot cooling water is initially cooled and lowered through the hot water chamber, reducing the workload of the cooling water tower and improving the cooling efficiency of the cooling water. Thirdly, because the hot water chamber is connected to the cooling water chamber at the bottom, the liquid level of the cooling water in the cooling circulating water tank is guaranteed.

[0028] The water outlet of the vacuum rehumidification machine 1 is connected to the top of the hot water chamber 33 through the first pipeline 6. Specifically, the water outlet of the first pipeline above the hot water chamber maintains a certain distance from the liquid level of the hot water chamber, rather than being inserted below the liquid level of the hot water chamber. This structural setting is conducive to the uniform distribution of the heated cooling water discharged from the vacuum rehumidification machine in the hot water chamber, and improves the heat exchange efficiency with the external environment.

[0029] The hot water outlet on the side of the hot water chamber is connected to the inlet of the first circulating water pump 4 through the second pipeline, and the outlet of the first circulating water pump is connected to the inlet of the cooling water tower through the third pipeline 7; in the technical solution of the present application, the hot water outlet on the side of the hot water chamber is arranged at the middle position of the side wall of the hot water chamber close to the liquid surface, and this position belongs to the relatively calm area of ​​the cooling water in the hot water chamber. The heated cooling water discharged from the vacuum rehumidifier oscillates with the liquid surface above the hot water chamber to facilitate the mixing of the hot cooling water. At the same time, the lower part is connected to the cooling water chamber, and the flow phenomenon will occur between the two chambers due to the temperature difference. In summer, the amount of water discharged to the cooling water tower is large, and more cooled cooling water will enter the hot water chamber, which will initially reduce the temperature of the hot cooling water in the hot water chamber. In winter, the amount of hot cooling water discharged to the cooling water tower is reduced or the cooling water tower is disabled. At this time, the hot cooling water in the hot water chamber enters the cooling water chamber, and the cooling water is heated to prevent the temperature of the cooling water from being too low.

[0030] The outlet of the cooling water tower 2 is connected to the top of the cooling water chamber through the fourth pipeline 8, and the water outlet of the fourth pipeline is also located above the liquid level of the cooling water chamber, so as to facilitate the rapid mixing of the cooled cooling water and the original cooling water in the cooling water chamber, thereby preventing the occurrence of undercurrent entering the cooling water outlet of the cooling water chamber and causing instability of the vacuum rehumidification machine.

[0031] The cooling water outlet at the bottom of the cooling water chamber is connected to the inlet of the second circulating water pump through the fifth pipeline 9, and the outlet of the second circulating water pump is connected to the water inlet of the vacuum rehumidification machine through the sixth pipeline 10; the flow rate of the second circulating water pump is related to the operation of the vacuum rehumidification machine. Because the production line is operated, maintaining stable production of the production line is an important requirement under normal circumstances, so the flow rate of the second circulating water pump is usually relatively stable.

[0032] Temperature sensors are arranged at the inlet of the first circulating water pump, the inlet of the second circulating water pump, the hot water chamber and the cooling water chamber; the processor is respectively connected with the temperature sensor, the first circulating water pump and the second circulating water pump via electrical signals.

[0033] The purpose of setting a temperature sensor at the inlet of the first circulating water pump is to detect the water temperature entering the inlet of the first circulating water pump. If the water temperature is too high, under the same circumstances, the cooling efficiency of the cooling water tower should be improved, such as increasing the fan speed, etc. If the temperature is low, the power of the cooling water tower should be reduced accordingly to achieve the purpose of energy saving.

[0034] The purpose of setting a temperature sensor at the inlet of the second circulating water pump is to monitor the temperature of the cooling water entering the vacuum rehumidification machine. When the temperature is lower than the set temperature, the temperature of the cooling water is increased by reducing the power of the cooling water tower and the flow rate of the first circulating water pump to keep the cooling water temperature entering the vacuum rehumidification machine within the set range. When the temperature is higher than the set temperature, the cooling is achieved by increasing the power of the cooling water tower and the flow rate of the first circulating water pump.

[0035] A temperature sensor is provided above the liquid level of the hot water chamber to monitor the temperature change of the cooling water discharged from the vacuum rehumidification machine, so as to facilitate the regulation of the circulation system.

[0036] A temperature sensor is arranged above the liquid level of the cooling water chamber to monitor the temperature of the cooling water chamber and cooperate with the temperature sensor at the inlet of the second circulating water pump to ensure the stability of the cooling water temperature entering the vacuum rehumidification equipment.

[0037] In the technical solution of the present application, the temperature sensor, the first circulating water pump and the second circulating water pump are all electrically connected to the processor, and the processor is also electrically connected to the fan controller of the cooling water tower to achieve power regulation of the cooling water tower.

[0038] The outlet of the first pipeline above the hot water chamber is located above the center of the hot water chamber, which facilitates the uniform mixing of the heated cooling water discharged from the vacuum rehumidification machine at the liquid level above the hot water chamber.

[0039] The outlet of the fourth pipeline is close to the partition, and the cooling water outlet at the bottom of the cooling water chamber is arranged on the side of the center of the cooling water chamber away from the partition. This arrangement is to avoid the cooling water coming out of the cooling water tower from interfering with the water flow at the cooling water outlet during the process of entering the cooling water chamber. The cooling water outlet deviates from the center position of the cooling water chamber, and its distance from the connecting part is increased to reduce or avoid fluctuations generated during the exchange of cold and hot water, thereby preventing it from affecting the stability of the cooling water outlet temperature.

[0040] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A flexible energy-saving vacuum rehumidification machine cooling water circulation system, characterized in that: It includes a vacuum rehumidification machine, a cooling water tower, a first circulating water pump, a second circulating water pump, a cooling circulating water tank, a temperature sensor and a processor; A partition is provided in the cooling circulation water tank to separate the cooling circulation water tank into a hot water chamber and a cooling water chamber which are connected at the bottom, a hot water outlet is provided at the side of the hot water chamber, and a cooling water outlet is provided at the bottom of the cooling water chamber; The water outlet of the vacuum rehumidifier is connected to the top of the hot water chamber through the first pipeline; the hot water outlet on the side of the hot water chamber is connected to the inlet of the first circulating water pump through the second pipeline, and the outlet of the first circulating water pump is connected to the inlet of the cooling water tower through the third pipeline; The outlet of the cooling water tower is connected to the top of the cooling water chamber through the fourth pipeline; the cooling water outlet at the bottom of the cooling water chamber is connected to the inlet of the second circulating water pump through the fifth pipeline, and the outlet of the second circulating water pump is connected to the water inlet of the vacuum rehumidification machine through the sixth pipeline; Temperature sensors are provided at the inlet of the first circulating water pump, the inlet of the second circulating water pump, the hot water chamber and the cooling water chamber; the processor is respectively connected to the temperature sensor, the first circulating water pump and the second circulating water pump via electrical signals; The outlet of the fourth pipeline is close to the partition, and the cooling water outlet at the bottom of the cooling water chamber is arranged on a side of the center of the cooling water chamber away from the partition; The volume of the hot water chamber is smaller than the volume of the cooling water chamber.

2. The cooling water circulation system of the flexible energy-saving vacuum rehumidifier according to claim 1 is characterized in that: The hot water outlet on the side of the hot water chamber is arranged at the middle position of the liquid level, and the outlet of the first pipeline above the hot water chamber is located above the center of the hot water chamber.

3. The cooling water circulation system of the flexible energy-saving vacuum rehumidifier according to claim 1 is characterized in that: The fan controller of the cooling water tower is connected with the processor via electrical signals.

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