Unstable heat source recovery system

Abstract

The utility model provides an unstable heat source recovery system, which belongs to the technical field of waste heat recovery and utilization, and comprises a hot water source and a cold water source, process equipment, a heat exchanger and a heat pump unit are connected in parallel between the hot water source and the cold water source, and the heat exchanger and the heat pump unit are respectively connected with a water pipeline; the cold water source is heated to the hot water source through the process equipment to form a heat exchange pipeline; the hot water source is cooled through the heat exchanger and the heat pump unit and then reaches the cold water source, and water in a water using pipeline connecting the heat exchanger and the heat pump unit is heated and then conveyed to the heat using tail end to form a heat supply pipeline. The cold water source is heated to the hot water source through the heat pump unit, and water in the water using pipeline connected with the heat pump unit is cooled and then conveyed to the cold using tail end, so that a refrigeration pipeline is formed. According to the unstable heat source recovery system, organic integration of a heat source and a cold source can be achieved, the comprehensive utilization efficiency of energy is improved, diversified heat and cold use requirements are met, and meanwhile operation cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery and utilization technology, and more specifically, it relates to an unsteady-state heat source recovery system. Background Technology

[0002] my country has embarked on a new path of energy conservation, emission reduction, and intensive development. In the pharmaceutical industry, energy conservation and emission reduction are essential for reducing operating costs and ensuring sustainable development of enterprises. At the same time, promoting the intelligentization of the pharmaceutical industry is also imperative.

[0003] Against this backdrop, pharmaceutical companies, especially large-volume parenteral solutions production lines, generate significant amounts of waste heat during operation from many processes and equipment. Direct discharge of this heat not only wastes energy but can also cause thermal pollution. A stable and reliable supply of heat and cold sources is crucial for ensuring normal production and daily life in various heating and cooling scenarios. Traditional heating and cooling systems often operate independently, with heat and cold sources lacking coordination, making it difficult to adapt to complex and changing energy demands, and resulting in high energy consumption and operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a non-steady-state heat source recovery system that can achieve the organic integration of heat source and cold source, improve the comprehensive energy utilization efficiency, meet diverse heating and cooling needs, and reduce operating costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an unsteady-state heat source recovery system, including a hot water source and a cold water source, wherein process equipment, a heat exchanger and a heat pump unit are connected in parallel between the hot water source and the cold water source, and the heat exchanger and the heat pump unit are respectively connected to water pipes;

[0006] The cold water source is heated by the process equipment and then sent to the hot water source to form a heat exchange pipeline;

[0007] The hot water source is cooled by the heat exchanger and the heat pump unit before reaching the cold water source. The water in the water supply pipeline connecting the heat exchanger and the heat pump unit is heated and then transported to the heat-consuming terminal to form a heating pipeline.

[0008] The cold water source is heated by the heat pump unit and then sent to the hot water source. The water in the water supply pipeline connected to the heat pump unit is cooled and then transported to the cooling terminal to form a refrigeration pipeline.

[0009] In one possible implementation, the unsteady-state heat recovery system also includes a cooling tower, with the drain side of the cooling tower connected to a cold water source and the inlet side of the cooling tower switched to a hot water source and a heat pump unit.

[0010] In one possible implementation, a liquid level balancing pipeline connects the hot water source and the cold water source.

[0011] In one possible implementation, two level pumps are connected in parallel on the level balancing pipeline.

[0012] In one possible implementation, the outlet of the cold water source and the outlet of the hot water source are each connected to two parallel water pumps.

[0013] In one possible implementation, two parallel process cooling water pumps are also installed between the cold water source and the process equipment, and the two process cooling water pumps are connected in parallel with the water pump.

[0014] In one possible implementation, two parallel end pumps are installed on the water pipeline.

[0015] In one possible implementation, the hot water source is any one of a hot water pool, a hot water storage tank, or a hot water container.

[0016] In one possible implementation, the cold water source is any one of a cold water pool, a cold water storage tank, or a cold water container.

[0017] The beneficial effects of this non-steady-state heat source recovery system are as follows: Compared with the prior art, cold water is heated by process equipment and then sent to hot water source to form a heat exchange pipeline. In the heat exchange pipeline, cold water from the cold water source is heated by process equipment and stored in hot water source for cooling process equipment. Hot water source is cooled by heat exchanger and heat pump unit and then sent to cold water source. Water in the water pipeline connecting heat exchanger and heat pump unit is heated and then sent to the heat-using terminal to form a heating pipeline. In the heating pipeline, hot water from the hot water source is cooled by heat exchanger and heat pump unit and then stored in cold water source. Hot water produced by heat exchanger and heat pump unit is sent to the heat-using terminal for heating during the heating season. Cold water source is heated by heat pump unit and then sent to hot water source. Water in the water pipeline connecting heat pump unit is cooled and then sent to the cold-using terminal to form a refrigeration pipeline. In the refrigeration pipeline, chilled water from the cold water source is heated by the heat pump unit and stored in the hot water source. The chilled water produced by heat exchange through the water pipeline is then delivered to the cooling terminals for use during the cooling season. This utility model provides an unsteady-state heat source recovery system that can achieve the organic integration of heat and cold sources, improve the overall energy utilization efficiency, meet diverse heating and cooling needs, and reduce operating costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a non-steady-state heat source recovery system provided for an embodiment of the present invention.

[0020] In the diagram: 1. Hot water source; 2. Cold water source; 3. Process equipment; 4. Heat exchanger; 5. Heat pump unit; 6. Cooling tower; 7. Liquid level pump; 8. Pump; 9. Process cooling water pump; 10. Terminal pump. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0023] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.

[0024] Please see Figure 1This invention provides a non-steady-state heat source recovery system. The system includes a hot water source 1 and a cold water source 2. A process device 3, a heat exchanger 4, and a heat pump unit 5 are connected in parallel between the hot water source 1 and the cold water source 2. The heat exchanger 4 and the heat pump unit 5 are respectively connected to water pipes. The cold water source 2 is heated by the process device 3 and then flows to the hot water source 1, forming a heat exchange pipe. The hot water source 1 is cooled by the heat exchanger 4 and the heat pump unit 5 and then flows to the cold water source 2. The water in the water pipes connecting the heat exchanger 4 and the heat pump unit 5 is heated and then transported to the heating terminal, forming a heating pipe. The cold water source 2 is heated by the heat pump unit 5 and then flows to the hot water source 1. The water in the water pipes connecting the heat pump unit 5 is cooled and then transported to the cooling terminal, forming a cooling pipe.

[0025] This utility model provides an unsteady-state heat source recovery system. Compared with the prior art, cold water source 2 is heated by process equipment 3 and then sent to hot water source 1 to form a heat exchange pipeline. In the heat exchange pipeline, cold water in cold water source 2 is heated by process equipment 3 and stored in hot water source 1 for cooling process equipment 3. Hot water source 1 is cooled by heat exchanger 4 and heat pump unit 5 and then sent to cold water source 2. Water in the water pipeline connecting heat exchanger 4 and heat pump unit 5 is heated and then transported to the heat-using terminal to form a heating pipeline. In the heating pipeline, hot water in hot water source 1 is cooled by heat exchanger 4 and heat pump unit 5 and then stored in cold water source 2. Hot water produced by heat exchange through heat exchanger 4 and heat pump unit 5 is sent to the heat-using terminal for heating during the heating season. Cold water source 2 is heated by heat pump unit 5 and then sent to hot water source 1. Water in the water pipe connected to heat pump unit 5 is cooled and then transported to the cooling terminal to form a refrigeration pipeline. In the refrigeration pipeline, cold water in cold water source 2 is heated by heat pump unit 5 and stored in hot water source 1. Cold water produced by heat exchange in the water pipe through heat pump unit 5 is sent to the cooling terminal for cooling during the cooling season. This utility model provides an unsteady-state heat source recovery system that can achieve the organic integration of heat source and cold source, improve the comprehensive energy utilization efficiency, meet diverse heating and cooling needs, and reduce operating costs.

[0026] The heat-using terminals are fan coil units and radiators; the cold-using terminals are fan coil units or cold ceiling systems. Heat exchanger 4 is a plate heat exchanger.

[0027] During the heating season, the hot water from hot water source 1 flows through heat exchanger 4, and the low-temperature water is either recycled to cold water source 2 or discharged. If the hot water temperature of hot water source 1 is too low to meet the heat exchange requirements of heat exchanger 4, the hot water from hot water source 1 is switched to flow through heat pump unit 5, and the low-temperature water is either recycled to cold water source 2 or discharged.

[0028] Please see Figure 1The unsteady-state heat recovery system also includes a cooling tower 6. The drain side of the cooling tower 6 is connected to a cold water source 2, and the inlet side of the cooling tower 6 is switched between a hot water source 1 and a heat pump unit 5. When used for cooling during the cooling season, the cold water from the cold water source 2 flows through the heat pump unit 5, and the high-temperature water is either recovered to the hot water source 1 or discharged. If the temperature of the cold water from the cold water source 2 is still high after flowing through the heat pump unit 5, it flows through the cooling tower 6 for further cooling, and the low-temperature water is either recovered to the cold water source 2 or discharged. During nighttime periods of low temperature and low electricity prices, the hot water from the hot water source 1 is cooled by the cooling tower 6, and the low-temperature water is either recovered to the cold water source 2 or discharged.

[0029] In addition, a level balancing pipeline connects hot water source 1 and cold water source 2, and two level pumps 7 are connected in parallel on the level balancing pipeline. By turning on the level pumps 7, the connection between hot water source 1 and cold water source 2 is switched, thereby achieving level balancing of hot water source 1 and cold water source 2 and mixing and cooling of the water. Of the two level pumps 7, one is the main pump and the other is the auxiliary pump. If one pump fails, the other can be switched on, allowing for maintenance and repair under continuous production conditions.

[0030] Two parallel water pumps 8 are connected to the outlets of cold water source 2 and hot water source 1, respectively. When cold water or hot water is needed, the pumps 8 can be selectively pumped from cold water source 2 or hot water from hot water source 1 by switching the relevant valves. Of the two pumps 8, one is the main pump and the other is the auxiliary pump. If one pump malfunctions, the pump can be switched to the other, allowing for maintenance and repair under continuous production conditions.

[0031] Two parallel process cooling water pumps 9 are installed between the cold water source 2 and the process equipment 3. By switching relevant valves, the process cooling water pumps 9 can directly draw cold water from the cold water source 2 and flow it through the process equipment 3 to cool it down. Of the two process cooling water pumps 9, one is the main pump and the other is the auxiliary pump. If one pump malfunctions, the pump can be switched to the other, allowing for maintenance and repair under continuous production conditions. The two process cooling water pumps 9 are connected in parallel with the pump 8. By switching the connection between the process cooling water pumps 9 and the pump 8 to the cold water source 2, the cold water source 2 can be used to directly cool the process equipment 3 or participate in the heat exchange of the heat pump unit 5 under different conditions.

[0032] Two parallel terminal water pumps 10 are installed on the water pipeline to discharge water from the pipeline and deliver it to the heating or cooling terminals. Of the two terminal water pumps 10, one is the main pump and the other is the auxiliary pump. If one pump fails, the pump can be switched to the other, allowing for maintenance and repair under continuous production conditions.

[0033] Specifically, the hot water source 1 can be any one of a hot water pool, a hot water storage tank, or a hot water container.

[0034] Specifically, cold water source 2 can be any one of a cold water pool, a cold water storage tank, or a cold water container.

[0035] This system is mainly used to collect unstable heat sources generated during the production process of process equipment 3 in the large-volume infusion workshop and is applied to systems with stable demand in this enterprise.

[0036] Process cooling water pump 9 draws cold water from the cold water pool and supplies it to the process equipment 3 for cooling and heating. The high-temperature cooling water is then collected in the hot water pool.

[0037] During the heating season, the water pump 8 draws high-temperature water from the hot water tank to the heat exchanger 4. After heat exchange, the low-temperature water is recycled to the cold water tank or discharged. When the water temperature in the hot water tank is too low to pass through the heat exchanger 4, the valve is switched so that the hot water in the hot water tank passes through the water pump 8 to the heat pump unit 5. After heat exchange, the low-temperature water is recycled to the cold water tank or discharged. The hot water produced after heat exchange by the heat exchanger 4 and the heat pump unit 5 is sent to the heating terminal of the enterprise by the terminal water pump 10.

[0038] During the cooling season, the water pump 8 draws cold water from the cold water pool to the heat pump unit 5 for cooling. The high-temperature water is then recycled to the hot water pool or discharged externally. When the water temperature in the cold water pool is too high to cool, the relevant valves are switched to allow the high-temperature cooling water after passing through the heat pump unit 5 to go to the cooling tower 6. After heat exchange, the low-temperature water is recycled to the cold water pool or discharged externally. The cold water after being cooled by the heat pump unit 5 is sent to the cooling terminals of the enterprise via the terminal water pump 10.

[0039] During the non-heating and non-cooling seasons, process cooling water pump 9 draws cold water from the cold water pool and supplies it to process equipment 3 for cooling and heating. The high-temperature cooling water is then collected in the hot water pool. During nighttime periods when the temperature is low and electricity prices are low, the low-temperature water cooled by cooling tower 6 is either recycled back to the cold water pool or discharged.

[0040] Example:

[0041] Operating costs for this system during the heating season:

[0042]

[0043] Operating cost = (336.4 × 10 × 1) / 10000 = 0.34 million yuan

[0044] Operating costs for heating season using gas-fired boilers:

[0045] 1) This calculation is based on a thermal efficiency of 80% for the gas-fired boiler;

[0046] 2) Based on the calorific value of the gas being 33.49 MJ per cubic meter;

[0047]

[0048] Operating cost = {(1800×1000×3600×10) / (33.49×10^6×0.8)}×4.31 / 10000 = 10,400 yuan

[0049] 2.3 Calculation Basis:

[0050] 1) The heating season lasts for 120 days a year;

[0051] 2) Based on 10 hours of operation per day, the average electricity price is calculated at 1 yuan / kWh;

[0052] 3) Formula for calculating electricity costs for heat pump units: Operating cost = (Power consumption × Hours × Number of days × Electricity cost) × Load factor;

[0053] 4) Existing formula for calculating heating costs of gas-fired boilers: Operating cost = {(Heat load × hours × number of days × load factor) / (calorific value of gas per m³ × boiler efficiency)} × gas price

[0054] 1. Comparison of operating costs

[0055] The above calculations show that, based on a peak user-side heat load of 1880 kW and 10 hours of heating per day during the heating season, the total daily load is:

[0056] 1800×10=18000KW / day

[0057] The above plan specifies the daily heat recovery capacity (hot water tank + plate heat exchanger + heat pump unit):

[0058]

[0059] Operating costs are shown in the table below:

[0060] When the daily heat recovery rate is at 100% load

[0061]

[0062] When the daily heat recovery rate is 75% load

[0063]

[0064] When the daily heat recovery is at 50% load

[0065]

[0066] When the daily heat recovery is at 25% load

[0067]

[0068] The annual operating costs are summarized in the table below:

[0069]

[0070] This system saves approximately 741,500 yuan in operating costs annually compared to a gas-fired boiler.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An unsteady-state heat source recovery system, characterized in that, It includes a hot water source (1) and a cold water source (2), and process equipment (3), a heat exchanger (4) and a heat pump unit (5) are connected in parallel between the hot water source (1) and the cold water source (2). The heat exchanger (4) and the heat pump unit (5) are respectively connected to water pipes. The cold water source (2) is heated by the process equipment (3) and then sent to the hot water source (1) to form a heat exchange pipeline; The hot water source (1) is cooled by the heat exchanger (4) and the heat pump unit (5) respectively and then sent to the cold water source (2). The water in the water supply pipeline connecting the heat exchanger (4) and the heat pump unit (5) is heated and then transported to the heat-consuming terminal to form a heating pipeline. The cold water source (2) is heated by the heat pump unit (5) and then sent to the hot water source (1). The water in the water supply pipeline connected to the heat pump unit (5) is cooled and then transported to the cooling terminal to form a refrigeration pipeline.

2. The unsteady-state heat source recovery system as described in claim 1, characterized in that, The unsteady heat source recovery system also includes a cooling tower (6), the drain side of the cooling tower (6) is connected to a cold water source (2), and the inlet side of the cooling tower (6) is switched to connect to a hot water source (1) and a heat pump unit (5).

3. The unsteady-state heat source recovery system as described in claim 1, characterized in that, A liquid level balancing pipeline connects the hot water source (1) and the cold water source (2).

4. The unsteady-state heat source recovery system as described in claim 3, characterized in that, Two level water pumps (7) are connected in parallel on the level balancing pipeline.

5. The unsteady-state heat source recovery system as described in claim 1, characterized in that, The outlet of the cold water source (2) and the outlet of the hot water source (1) are respectively connected to two parallel water pumps (8).

6. The unsteady-state heat source recovery system as described in claim 5, characterized in that, Two parallel process cooling water pumps (9) are also installed between the cold water source (2) and the process equipment (3), and the two process cooling water pumps (9) are connected in parallel with the water pump (8).

7. The unsteady-state heat source recovery system as described in claim 1, characterized in that, Two parallel end pumps (10) are installed on the water pipeline.

8. A non-steady-state heat source recovery system as described in any one of claims 1-7, characterized in that, The hot water source (1) is any one of a hot water pool, a hot water storage tank or a hot water container.

9. A non-steady-state heat source recovery system as described in any one of claims 1-7, characterized in that, The cold water source (2) is any one of a cold water pool, a cold water storage tank, or a cold water container.

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