Modularized partitioned energy storage water tank system and multi-heat-source heat storage and supply system for cigarette factory

Abstract

The invention relates to the field of low-grade waste heat recycling, in particular to a cigarette factory modular partition energy storage water tank system and a multi-heat-source heat storage and supply system. The modularized partitioned energy storage water tank system is composed of a plurality of water tank units which are sequentially connected in series, the upstream unit receives high-temperature hot water, the downstream unit is provided with a low-temperature water return port, the adjacent units are connected through an overflow turning pipe with a flow / flow direction control assembly, it is ensured that water flow is unidirectional, and the flow is regulated and controlled. The system further comprises a multi-heat-source heat storage and supply system, water is supplied to different water tank units through a plurality of heat sources, the water inlet temperature of each heat source is matched with the corresponding water tank temperature, a control system accurately regulates and controls a stop valve, and efficient heat distribution and utilization are achieved. Space distinguishing of hot water at different temperatures can be achieved, temperature gradient maintaining is simplified, multi-temperature-zone output according to needs is achieved, modular design is convenient to expand and maintain, the waste heat utilization efficiency is effectively improved, energy consumption is reduced, and the refined layering requirements of different processes for the heat supply temperature in cigarette industrial production are met.

Description

Technical Field

[0001] The present invention relates to the field of low-grade waste heat recovery and utilization, and particularly to a modular partition energy storage water tank system and a multi-heat source heat storage and heating system for a cigarette factory. Background Art

[0002] In the production of the cigarette industry, core processes such as silk making, tobacco drying, and packaging have refined hierarchical requirements for the heating temperature. For example, the rewetting of cut tobacco requires a medium with a relatively high temperature to soften the cut tobacco, while the rewetting of leaf tobacco needs to be controlled within a relatively low temperature range to avoid loss of aroma components. Some high-end processes even require operation in a lower temperature environment. The precise control of temperature in different processes will directly affect product quality and production efficiency.

[0003] Existing waste heat recovery systems generally adopt a single large-scale hot water storage tank. Although it can store waste heat to a certain extent, its structural design and operation mode have the following technical defects:

[0004] (1) Lack of a hierarchical control mechanism for cold and hot water mixing. Traditional hot water storage tanks operate according to the basic circulation mode of inlet water at the top and outlet water at the bottom, but do not have an effective heat gradient maintenance device. During the dynamic heat storage process, the newly injected high-temperature waste hot water mixes violently with the original water body in the tank, resulting in a significant decrease in the utilization efficiency of high-grade heat. This design ignores the hierarchical treatment of waste heat with different temperature grades, directly transports the mixed waste heat to the user side, and it is difficult to accurately and flexibly match the heat consumption requirements of multiple temperature zones and multiple loads. The existing system fails to establish a mapping relationship between temperature and space, allowing high-grade waste heat return water (such as waste heat recovery from drying equipment) to be directly mixed and stored with medium- and low-grade waste heat return water (such as waste heat recovery from cooling water of air-conditioning systems), causing a decrease in the utilization efficiency of high-grade heat and serious energy waste.

[0005] (2) Difficulty in maintaining temperature gradient stratification. Existing large-scale energy storage water tanks usually rely on external diversion devices to maintain the stratification state of hot water. To achieve this goal, the system often needs to control the water inlet speed at a relatively low level to suppress the turbulent mixing phenomenon. However, during actual operation, affected by the fluctuations in pump head and process load changes, in order to maintain the thermal stratification state, high-power circulation pumps usually need to be configured, which undoubtedly significantly increases the operating cost of the system. Moreover, as the temperature difference between the upper and lower parts of the water tank gradually increases, the spontaneous mixing phenomenon of the liquid in the water tank will become more serious, further weakening the effect of temperature stratification.

[0006] (3) The way of supplying hot water externally is relatively single. Limited by the structure of single-point water intake at the bottom, the existing system can only output the hot water at the lowest part of the water tank. Due to the temperature gradient inside the water tank, the temperature of the hot water is relatively low. When high-temperature hot water is required in the silk reeling process or the cigarette baking process, it is necessary to reheat the stored medium- and low-temperature hot water, which not only increases the additional energy consumption but also seriously weakens the economy of waste heat utilization.

[0007] (4) The transformation process is difficult and lacks flexibility. Large storage tanks generally adopt an integral welded structure. Once capacity expansion and transformation are needed, production must be stopped for construction, and the entire storage tank needs to be replaced. The average transformation cycle is relatively long, the construction process is complex, and it is difficult to meet the requirements of production capacity fluctuations and dynamic regulation of heat sources in multiple temperature zones, greatly limiting the flexibility and adaptability of enterprises in the production process. Summary of the Invention

[0008] In view of the above deficiencies or defects in the prior art, the present invention provides a modular partition energy storage water tank system for a cigarette factory. The water tank system includes a plurality of modular water tank units, forming a temperature difference between the water tank units, storing water at different temperatures in different water tank units, distinguishing and storing different quality heat sources, and targeting the output.

[0009] To achieve the above object, the present invention provides a modular partition energy storage water tank system, including a plurality of water tank units connected in series in sequence. The upstream water tank unit of the water tank system receives high-temperature hot water through a water inlet pipe, and the downstream water tank unit is provided with a low-temperature return water outlet.

[0010] Adjacent water tank units are connected by a transfer overflow pipe, and a flow / flow direction control component is provided on the transfer overflow pipe, only allowing water to flow from the upstream water tank unit to the downstream water tank unit.

[0011] In some embodiments, several water tank units form a unit group, and the water tank system includes a plurality of unit groups; each unit group is equipped with an independent hot water supply outlet for supplying water externally.

[0012] In some embodiments, the water inlet of the water tank unit is provided at the top, and the water outlet is provided at the bottom; the inlet end of the transfer overflow pipe is connected to the water outlet at the bottom of the upstream water tank unit, and the outlet end is connected to the water inlet of the downstream water tank unit.

[0013] In some embodiments, a flow equalizer is provided at the water inlet of each water tank unit. The flow equalizer is a plate-type or cylinder-type structure with radially distributed pores, and its pore diameter changes in a gradient from the center to the outside or from the top to the bottom. The flow equalizer is installed at the outlet of the water inlet pipe and is fixedly connected to the wall of the water tank unit (2).

[0014] In some embodiments, multiple water tank units are arranged in a concentric circular layout in series order, with the upstream water tank unit close to the central part and the downstream water tank units arranged outward in sequence.

[0015] In some embodiments, the water tank system is externally covered with a heat insulation layer, and the heat insulation layer covers all water tank units. Heat insulation plates are arranged between the water tank units.

[0016] Applying the water tank system provided by the present invention, the present invention also provides a multi-heat-source heat storage and heating system.

[0017] The multi-heat-source heat storage and heating system includes multiple heat sources. Each heat source is connected to different water tank units through multiple water inlet branch pipes, and stop valves are arranged on the water inlet branch pipes; the heat source enters the water tank unit whose water temperature is lower than its own temperature.

[0018] In some embodiments, the water supply system further includes a control system; temperature sensors are arranged inside the water tank units, and heat source temperature sensors are arranged on the input sides of the heat sources;

[0019] The heat source is connected to the inlet of the flow splitting component, the flow splitting component has multiple outlets, and the outlets of the flow splitting component are respectively connected to different water tank units of the water tank system through the water inlet branch pipes;

[0020] The control system controls the stop valve. When the heat source supplies water, only one water inlet branch pipe is opened, and the heat source is connected to the water tank unit whose water temperature is lower than the water inlet temperature and has the smallest temperature difference.

[0021] In some embodiments, when the water tanks in the water tank system are divided into unit groups;

[0022] Only water inlet temperature sensors are arranged in the first-end water tank unit and water outlet temperature sensors are arranged in the last-end water tank unit within the unit group;

[0023] The last-end water tank unit of the unit group is provided with a hot water outlet. The water outlets of multiple unit groups are connected to the confluence component through water outlet branch pipes, and stop valves are arranged on the water outlet branch pipes; the control system only opens one water outlet branch pipe according to the data of each water outlet temperature sensor, and connects the confluence component to the unit group with the smallest temperature difference from the target water outlet temperature.

[0024] In some embodiments, the first-end water tank unit of the unit group is provided with a heat source water inlet, and each water inlet branch pipe of the flow splitting component is respectively connected to the heat source water inlets of each unit group;

[0025] The control system controls the stop valve to only open one water inlet branch pipe according to the data of the heat source temperature sensor and the water inlet temperature sensor, and connects the flow splitting component to the unit group whose water temperature is higher than the water inlet temperature and has the smallest temperature difference.

[0026] Applying the above technical solution of the present invention, a modular partition energy storage water tank system has the following effects:

[0027] (1) Spatial differentiation of hot water at different temperatures: Since multiple water tank units are connected in series in sequence, only water is allowed to flow from the upstream unit to the downstream unit, and heat is continuously dissipated during each stage of flow, forming a temperature gradient with a high temperature at the head end and a low temperature at the tail end, clearly differentiating the heat storage areas at different temperatures.

[0028] (2) Simplified and efficient maintenance of temperature gradient: A transfer overflow pipe with flow rate and flow direction control components is set between the water tank units, automatically blocking reverse flow and mixing, avoiding direct mixing of cold and hot water in a large water tank, making the maintenance of the temperature gradient more reliable and eliminating the need for large-scale diversion devices.

[0029] (3) Output according to requirements in multiple temperature zones: Each water tank unit corresponds to a different temperature range. The appropriate unit can be selected according to the required water extraction temperature, directly outputting hot water at the target temperature without secondary heating, improving the thermal energy utilization efficiency and system flexibility.

[0030] (4) Modular expansion and convenient maintenance: The system is composed of multiple small water tank units. The system capacity can be flexibly adjusted by increasing or decreasing the number of units. During maintenance, only the corresponding transfer overflow pipes need to be connected or disconnected, without the need to shut down and remove the whole, significantly shortening the transformation cycle and reducing the construction difficulty.

[0031] The present invention also provides a multi-source heat storage and heating system, which applies the water tank system provided above in the previous text of the present invention. While having the advantages of the foregoing water tank system, the multi-source heat storage and heating system also has the following effects:

[0032] (1) Flexible access of multiple heat sources. By introducing multiple water inlet branch pipes and stop valves, the most suitable water tank unit can be connected according to the temperatures of different heat sources respectively. Hierarchical storage of high-temperature and medium-low-temperature waste heat is realized, avoiding temperature interference between heat sources and improving the utilization efficiency of each heat source.

[0033] (2) Automatic temperature matching. The heat source inlet water only enters the water tank unit with a temperature lower than its own temperature, reducing the attenuation loss of the heat source temperature. The high-temperature heat source can release heat in the most suitable temperature zone, improving the heating quality and saving auxiliary heating energy.

[0034] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0035] Figure 1 It is a schematic diagram of a modular partition energy storage water tank system of the present invention.

[0036] Description of the Reference Numerals

[0037] 1 - Water inlet; 2 - Water tank unit; 3 - Overflow water pipe; 4 - Flow equalizer; 5 - Flow rate / flow direction control component; 6 - Water outlet. Specific Implementation Modes

[0038] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for explaining and illustrating the present invention, and are not used to limit the present invention.

[0039] In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer of the contour of each component itself.

[0040] Modular partition energy storage water tank system

[0041] The present invention provides a modular partition energy storage water tank system, aiming to solve the problems existing in the prior art waste heat recovery system, such as insufficient stratified control, difficult to maintain temperature gradient, and single water supply method.

[0042] Modular water tank unit 2: The modular partition energy storage water tank system is composed of a plurality of water tank units 2 connected in series in sequence. The upstream water tank unit 2 receives high-temperature hot water through the water inlet pipe, and the downstream water tank unit 2 is provided with a low-temperature return water outlet. Adjacent water tank units 2 are connected by a transfer overflow pipe, and a flow / flow direction control component 5 is equipped on the transfer overflow pipe to ensure that the water flow direction is from the upstream water tank unit 2 to the downstream water tank unit 2, and can effectively regulate the water flow rate.

[0043] In the design, the traditional large hot water storage tank is split into a plurality of small water tank units 2 connected in series. During the storage and transfer of hot water, due to heat dissipation, the temperature of the water tank closer to the downstream is lower. A flow / flow direction control component 5 is installed on the transfer overflow pipe, and this component includes a flow control valve and a check valve. A flow sensor, a filter and a pump can also be added. Among them, the flow sensor, the pump and the flow control valve are connected to the control system. Through the regulation of the control system, precise control of the flow rate of the transfer overflow pipe is achieved, and feedback adjustment is carried out according to the signal of the flow sensor. In addition, a liquid level sensor is also provided in each water tank unit 2. When the liquid level exceeds the set value, the operation of transferring hot water to the downstream water tank is automatically started.

[0044] In order to achieve flexible water supply requirements, several water tank units 2 form a unit group, and the entire water tank system includes multiple such unit groups. Each unit group is equipped with an independent hot water supply outlet for external water supply.

[0045] In order to achieve flexible water supply requirements, several water tank units 2 form a unit group, and the entire water tank system includes multiple such unit groups. Each unit group is equipped with an independent hot water supply outlet for external water supply. The number of hot water storage tanks in each unit group does not need to be exactly the same, and the number needs to be adjusted according to the heat source temperature and the required water supply temperature.

[0046] Inlet and outlet design: The inlet 1 of the water tank unit 2 is located at the top, and the outlet 6 is located at the bottom. The inlet end of the overflow pipe is connected to the outlet 6 at the bottom of the upstream water tank unit 2, and the outlet end is connected to the inlet 1 of the downstream water tank unit 2. This design utilizes the property that the density of hot water is less than that of cold water, enabling the cold and hot water in the water tank unit 2 to spontaneously stratify. Generally, the inlet temperature of the water tank unit 2 is higher than the outlet temperature, further enhancing the stratification effect.

[0047] At the inlet 1 of the water tank unit 2, a flow equalizer 4 is specially provided to strengthen the temperature stratification in the tank unit and reduce turbulence. The flow equalizer 4, also known as a diffuser or inlet distributor, is a key auxiliary device in the stratified energy storage water tank system. Its main function is to evenly distribute the high-temperature inlet water at the top to the upper part of the water tank, reduce the local flow velocity and turbulence, thereby forming a stable thermal stratification. The flow equalizer 4, through the pore size distribution and structural design, enables the hot fluid to sink smoothly, ensuring the formation of a clear thermal cliff between different temperature layers. The flow equalizer 4 can adopt a plate-type or cylinder-type structure with radially distributed pores, and the pore size changes in a gradient from the center outwards or from the top to the bottom, and is installed at the outlet of the inlet pipe and fixedly connected to the wall of the water tank unit (2).

[0048] Spatial arrangement of the water tank unit 2: Multiple water tank units 2 are arranged in a concentric circular layout in series. The upstream water tank unit 2 is close to the center, and the downstream water tank units 2 are arranged outward in sequence. This layout makes the temperature of the central water tank unit 2 the highest, and the temperature gradually decreases from the center to the edge, which helps to reduce the temperature difference between adjacent water tanks in the water tank space, thereby reducing the heat transfer between them and being beneficial to the preservation of high-quality high-temperature water.

[0049] An integrated heat insulation layer is coated on the outside of all water tank units 2 to insulate the entire water tank system. At the same time, heat insulation boards are arranged between the water tanks, which can not only reduce heat transfer but also reduce heat loss caused by air flow. The heat insulation boards are combined to form independent chamber spaces, and each water tank unit 2 is placed in the corresponding chamber space. The water tank units 2 in the same ring are divided into the same unit group to achieve the overall heat insulation effect.

[0050] Multi-source heat storage and heating system

[0051] Based on the above modular partition energy storage water tank system, the present invention further proposes a multi-source heat storage and heating system. The system includes multiple heat sources, and each heat source is connected to different water tank units 2 through multiple inlet branch pipes. Cut-off valves are equipped on the inlet branch pipes, enabling the heat source to supply water to the water tank units 2 with a temperature lower than its own.

[0052] To achieve precise control and efficient utilization of different heat sources, the system is equipped with a control system. A temperature sensor is set inside the water tank unit 2, and a heat source temperature sensor is set on the input side of any heat source. The heat source is connected to the inlet of the shunt component, which has multiple outlets and is respectively connected to multiple different water tank units 2 of the water tank system through the water inlet branch pipes. The control system controls the stop valve to ensure that the heat source water inlet only enters the water tank unit 2 with a water temperature lower than the inlet water temperature and the smallest temperature difference, thereby reducing the loss of heat source temperature attenuation, improving the heating quality, and saving auxiliary heating energy.

[0053] Specifically, the water tank unit 2 at the head end of the unit group is provided with a heat source water inlet, and each water inlet branch pipe of the shunt component is respectively connected to the heat source water inlets of each unit group. The control system controls the stop valve to only open one water inlet branch pipe according to the data of the heat source temperature sensor and the inlet water temperature sensor, and connects the shunt component to the unit group with a water temperature higher than the inlet water temperature and the smallest temperature difference, realizing the optimal matching of the heat source and the water tank.

[0054] In addition, the system supports multiple heat sources to be connected in parallel. A shunt component is arranged on each heat source side. The inlet of the shunt component is connected to the heat source, has multiple outlets, and is docked with different water tank units 2 through the water inlet branch pipes. Stop valves are installed on the water inlet branch pipes. Based on the data of the heat source temperature sensor and the inlet water temperature sensor, the system controller makes a joint decision to only open the water inlet branch pipe leading to the unit with a water temperature lower than the heat source and the smallest temperature difference, realizing the optimal matching of the heat source and the water tank unit 2.

[0055] A hot water outlet is set at the water tank unit 2 at the tail end of the unit group and is connected to the confluence component through the water outlet branch pipe. A stop valve is installed on the water outlet branch pipe. Only the inlet and outlet temperature sensors are set at the head and tail end water tank units 2 within the group. The control system selects the unit group closest to the target outlet water temperature according to the temperature data at the tail end of each group and opens its water outlet branch pipe to ensure that the outlet temperature is precise and stable. Different temperature hot water can be output externally according to the target demand to meet the different hot water demands of different production activities.

[0056] When the unit group supplies water externally, the upstream water tank automatically replenishes hot water to the downstream water tank to keep the downstream water tank not lower than the water supply level. When the hot water in a unit group is emptied, the control system will switch to another unit group to supply water externally. When the liquid level in the water tank unit 2 is higher than the set liquid level, the operation of transferring hot water to the downstream transfer water tank will be started regardless of whether it is supplying water or receiving heat source water.

[0057] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0058] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0059] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A modular partition energy storage water tank system, characterized in that, It includes multiple water tank units (2) connected in series successively. The upstream water tank unit (2) of the water tank system receives high-temperature hot water through an inlet pipe, and the downstream water tank unit (2) is provided with a low-temperature return water outlet. Adjacent water tank units (2) are connected by a transfer overflow pipe, and a flow / flow direction control component (5) is arranged on the transfer overflow pipe, which only allows water to flow from the upstream water tank unit (2) to the downstream water tank unit (2).

2. The modular partition energy storage water tank system according to claim 1, wherein A number of water tank units (2) form a unit group, and the water tank system includes multiple unit groups; each unit group is equipped with an independent hot water supply outlet for supplying water externally.

3. The modular partition energy storage water tank system according to claim 1, characterized in that The water inlet (1) of the water tank unit (2) is arranged at the top, and the water outlet (6) is arranged at the bottom; the inlet end of the transfer overflow pipe is connected to the water outlet (6) at the bottom of the upstream water tank unit (2), and the outlet end is connected to the water inlet (1) of the downstream water tank unit (2).

4. The modular partition energy storage water tank system according to claim 3, characterized in that, A flow equalizer (4) is arranged at the water inlet (1) of each water tank unit (2). The flow equalizer (4) is a plate-type or cylindrical structure with radially distributed pores, and its pore diameter changes in a gradient from the center outwards or from the top to the bottom. The flow equalizer (4) is installed at the outlet of the inlet pipe and is fixedly connected to the wall of the water tank unit (2).

5. The modular partition energy storage water tank system according to claim 1, wherein Multiple water tank units (2) are arranged in a concentric circular layout in series order, with the upstream water tank unit (2) close to the central part and the downstream water tank units (2) arranged outwards in sequence.

6. The modular partition energy storage water tank system according to claim 5, characterized in that The outer cover of the water tank system is provided with a heat insulation layer, and the heat insulation layer covers all water tank units (2); Heat insulation plates are arranged between the water tank units (2).

7. A multi-heat-source heat storage and heating system applying the water tank system according to any one of claims 1-6, characterized in that, The heat storage and water supply system includes multiple heat sources. Each heat source is connected to different water tank units (2) through multiple inlet branch pipes, and stop valves are arranged on the inlet branch pipes; the heat source supplies water to the water tank unit (2) whose water temperature is lower than its own temperature.

8. The multi-heat-source heat storage and heat supply system according to claim 7, wherein The water supply system further includes a control system; temperature sensors are arranged inside the water tank units (2), and heat source temperature sensors are arranged on the input sides of the heat sources; The heat source is connected to the inlet of a flow splitting component, and the flow splitting component has multiple outlets. The outlets of the flow splitting component are respectively connected to different water tank units (2) of the water tank system through inlet branch pipes; The control system controls the stop valve. When the heat source supplies water, only one inlet branch pipe is opened, and the heat source is connected to the water tank unit (2) whose water temperature is lower than the inlet water temperature and has the smallest temperature difference.

9. The multi-heat-source heat storage and heat supply system according to claim 8, wherein When the water tank system includes unit groups; Only an inlet water temperature sensor is arranged inside the first-end water tank unit (2) and an outlet water temperature sensor is arranged inside the last-end water tank unit (2) within the unit group; The last-end water tank unit (2) of the unit group is provided with a hot water supply outlet. The water outlets (6) of multiple unit groups are connected to a confluence component through outlet branch pipes, and stop valves are arranged on the outlet branch pipes; the control system only opens one outlet branch pipe according to the data of each outlet water temperature sensor, and connects the confluence component to the unit group with the smallest temperature difference from the target outlet water temperature.

10. The multi-heat-source heat storage and heating system according to claim 9, characterized in that, The first-end water tank unit (2) of the unit group is provided with a heat source water inlet, and each inlet branch pipe of the flow splitting component is respectively connected to the heat source water inlets of each unit group; The control system controls the stop valve to only open one inlet branch pipe according to the data of the heat source temperature sensor and the inlet water temperature sensor, and connects the flow splitting component to the unit group whose water temperature is higher than the inlet water temperature and has the smallest temperature difference.

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