Pharmaceutical remaining steam and condensate water recycling system

Abstract

The utility model provides a kind of remaining steam and condensate water recycling system for pharmacy, belong to steam recycling technical field, including gas-liquid separator, water storage tank and heat exchange heat supplement unit.Gas-liquid separator has material inlet, steam outlet and condensate water outlet.Water storage tank has water inlet connected with condensate water outlet.Water storage tank also has water outlet, first circulating water port and second circulating water port.Heat exchange heat supplement unit has evaporation section and condensation section.Evaporation section corresponds with first circulating water port and second circulating water port.Condensation section corresponds with steam outlet, and corresponding steam pipeline.Heat exchange heat supplement unit can absorb part of heat in condensate water in evaporation section, and heat is supplemented into steam by condensation section.The remaining steam and condensate water recycling system for pharmacy provided by the utility model can effectively ensure that steam heat is fully utilized, and can work continuously with the continuous production of pharmacy.

Description

Technical Field

[0001] This utility model belongs to the field of steam reuse technology, specifically relating to a system for recovering and reusing residual steam and condensate used in pharmaceutical manufacturing. Background Technology

[0002] In the production of traditional Chinese medicine, steam, as the core heat energy carrier, is widely used in key processes such as extraction, concentration, drying, sterilization, processing, and auxiliary heat preservation, and is mostly supplied by the municipal government.

[0003] In existing technologies, due to insufficient utilization of steam heat, excess steam is often generated, along with condensate. Both are discharged through exhaust pipes, such as steam being directly vented; while the condensate is collected and reused. Excess steam, having cooled by 20-30°C, is directly reused, limiting its application scenarios, for example, it cannot be adapted to specific circuits, thus resulting in significant heat waste. Condensate, with temperatures reaching up to 80°C, is typically used directly for cleaning. However, as cleaning water, its temperature does not need to reach 80°C, further contributing to heat waste. Utility Model Content

[0004] This utility model provides a pharmaceutical waste steam and condensate recovery and reuse system, which aims to solve the problem of poor practicality caused by the large amount of steam heat wasted in the existing traditional Chinese medicine production process.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a system for recovering and reusing waste steam and condensate for pharmaceutical use, comprising: The gas-liquid separator has a material inlet, a steam outlet, and a condensate outlet; The water storage tank has an inlet connected to the condensate outlet; the water storage tank also has an outlet, a first circulating water inlet and a second circulating water inlet; The heat exchange and heat replenishment unit has an evaporation section and a condensation section; the evaporation section corresponds to the first circulating water inlet and the second circulating water inlet; the condensation section corresponds to the steam outlet and the steam pipeline; the heat exchange and heat replenishment unit is used to absorb part of the heat in the condensate through the evaporation section and replenish the heat to the steam through the condensation section.

[0006] In one possible implementation, the heat exchange and reheating unit includes: A high-temperature heat pump has a heat medium inlet, a heat medium outlet, a refrigerant inlet, and a refrigerant outlet; the channels where the heat medium inlet and the heat medium outlet are located correspond to the evaporation section, the heat medium inlet is connected to the steam outlet, and the heat medium outlet is connected to the steam pipeline; the channels where the refrigerant inlet and the refrigerant outlet are located correspond to the condensation section, the refrigerant inlet is connected to the first circulating water inlet, and the refrigerant inlet is connected to the second circulating water inlet; The first circulating pump is located between the refrigerant inlet and the first circulating water inlet.

[0007] In one possible implementation, the high-temperature heat pump is a high-temperature screw heat pump.

[0008] In one possible implementation, the second circulating water inlet is located above the first circulating water inlet.

[0009] In one possible implementation, the heat exchange and reheating unit includes: High-temperature heat pumps have a heat medium inlet, a heat medium outlet, a refrigerant inlet, and a refrigerant outlet; The first heat exchanger has a first heat medium channel and a first refrigerant channel; the inlet and outlet of the first heat medium channel are respectively connected to the first circulating water inlet and the second circulating water inlet; the inlet and outlet of the first refrigerant channel are respectively connected to the heat medium inlet and the heat medium outlet; the channels where the heat medium inlet and the heat medium outlet are located correspond to the evaporation section, and the channels where the refrigerant inlet and the refrigerant outlet are located correspond to the condensation section. The second heat exchanger has a second heat medium passage and a second refrigerant passage; the inlet and outlet of the second heat medium passage are respectively connected to the refrigerant inlet and the refrigerant outlet; the inlet of the second refrigerant passage is connected to the steam outlet, and the outlet of the second refrigerant passage is connected to the steam pipeline. The second circulating pump is installed between the first heat medium channel and the first circulating water inlet; The third circulation pump is installed between the first refrigerant channel and the heat medium inlet; The fourth circulation pump is located between the refrigerant outlet and the inlet of the second heat medium channel.

[0010] In one possible implementation, both the first heat exchanger and the second heat exchanger are tube sheet heat exchangers.

[0011] In one possible implementation, the high-temperature heat pump is a high-temperature screw heat pump.

[0012] In one possible implementation, the second circulating water inlet is located above the first circulating water inlet.

[0013] In this implementation, the gas-liquid separator ensures the separation of residual steam mixed with condensate, simultaneously exporting steam and condensate separately for easy condensate recovery. The water storage tank buffers the collection of condensate. The heat exchange and supplementary heating unit extracts some heat from the condensate through the evaporation section corresponding to the first and second circulating water inlets, and releases this heat into the flowing steam through the condensation section, raising the temperature of the remaining steam to a suitable level for reuse. Simultaneously, the condensate temperature decreases, ensuring its suitability for subsequent cleaning water use. This system effectively ensures full utilization of steam heat and can operate continuously with ongoing pharmaceutical production. Attached Figure Description

[0014] Figure 1 A schematic diagram of the process flow structure of the pharmaceutical waste steam and condensate recovery and reuse system provided in this utility model embodiment 1; Figure 2 The schematic diagram of the process flow structure of the pharmaceutical waste steam and condensate recovery and reuse system provided in this utility model embodiment is shown in Example 2.

[0015] Explanation of reference numerals in the attached figures: 10. Gas-liquid separator; 20. Water storage tank; 30. Heat exchange and supplementary heat unit; 31. High-temperature heat pump; 32. First circulation pump; 33. First heat exchanger; 34. Second heat exchanger; 35. Second circulation pump; 36. Third circulation pump; 37. Fourth circulation pump; 38. First closed loop; 39. Second closed loop; 41. Material inlet; 42. Steam outlet; 43. Condensate outlet; 44. Water inlet; 45. Water outlet; 46. First circulating water inlet; 47. Second circulating water inlet; 48. Heat medium inlet; 49. Heat medium outlet; 50. Refrigerant inlet; 51. Refrigerant outlet. Detailed Implementation

[0016] 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.

[0017] Please refer to the following: Figure 1 and Figure 2The present invention provides a system for recovering and reusing waste steam and condensate for pharmaceutical applications. This system includes a gas-liquid separator 10, a water storage tank 20, and a heat exchange and supplementary heating unit 30. The gas-liquid separator 10 has a material inlet 41, a steam outlet 42, and a condensate outlet 43. The water storage tank 20 has an inlet 44 connected to the condensate outlet 43. The water storage tank 20 also has an outlet 45, a first circulating water inlet 46, and a second circulating water inlet 47. The heat exchange and supplementary heating unit 30 has an evaporation section and a condensation section. The evaporation section corresponds to the first circulating water inlet 46 and the second circulating water inlet 47. The condensation section corresponds to the steam outlet 42 and is connected to the steam pipeline. The heat exchange and supplementary heating unit 30 can absorb some of the heat from the condensate in the evaporation section and supplement the heat into the steam through the condensation section.

[0018] Specifically, its working principle is as follows: Steam from the municipal pipeline undergoes key processes such as extraction, concentration, drying, sterilization, processing, or auxiliary heat preservation. The remaining mixture of steam and condensate enters the gas-liquid separator 10 through material inlet 41. In the gas-liquid separator 10, gas-liquid separation occurs, causing the steam to exit at steam outlet 42 and the condensate at condensate outlet 43. The exited steam enters the condensation section of the heat exchange and supplementary heating unit 30. The temperature of the exited condensate is approximately 80°C, while the steam temperature drops by 20-30°C. For example, if 120°C steam is introduced into the municipal pipeline, the remaining steam temperature will be 90-100°C. At this point, the condensate enters the water storage tank 20, where it is buffered. The first circulating water inlet 46 and the second circulating water inlet 47 on the water storage tank 20 correspond to the evaporation section in the heat exchange and supplementary heat unit 30. This evaporation section can extract heat from the condensate as it passes through, and release this heat into the steam through the condensation section to further raise the steam temperature to the same or similar to the municipal steam temperature. The temperature of the condensate will drop, and the condensate in the water storage tank 20 will gradually decrease until the temperature approaches the cleaning water temperature, at which point the water in the water storage tank 20 will be drained.

[0019] The pharmaceutical waste steam and condensate recovery and reuse system provided in this embodiment, compared with the prior art, features a gas-liquid separator 10 that ensures the separation of waste steam mixed with condensate, while simultaneously exporting steam and condensate separately for easy condensate recovery. The water storage tank 20 buffers the collection of condensate. The heat exchange and supplementary heating unit 30 extracts some heat from the condensate through the evaporation section corresponding to the first circulating water inlet 46 and the second circulating water inlet 47, and releases this heat into the flowing steam through the condensation section, raising the temperature of the remaining steam to a suitable level for reuse. Simultaneously, the condensate temperature decreases, ensuring its suitability for subsequent cleaning water use. This system effectively ensures full utilization of steam heat and can operate continuously with ongoing pharmaceutical production.

[0020] Regarding the steam pipeline, it can be an air inlet pipe connected to the municipal pipeline.

[0021] Example 1 of the heat exchange and heat replenishment system for the pharmaceutical waste steam and condensate recovery and reuse system provided by this utility model: In some embodiments, the heat exchange and heat replenishment unit 30 described above may employ, for example... Figure 1 The structure shown. See also Figure 1 The heat exchange and supplementary heat unit 30 includes a high-temperature heat pump 31 and a first circulation pump 32. The high-temperature heat pump 31 has a heat medium inlet 48, a heat medium outlet 49, a refrigerant inlet 50, and a refrigerant outlet 51. The channels containing the heat medium inlet 48 and the heat medium outlet 49 correspond to the evaporation section; the heat medium inlet 48 is connected to the steam outlet 42, and the heat medium outlet 49 is connected to the steam pipeline. The channels containing the refrigerant inlet 50 and the refrigerant outlet 51 correspond to the condensation section; the refrigerant inlet 50 is connected to the first circulation inlet 46, and the refrigerant inlet 50 is connected to the second circulation inlet 47. The first circulation pump 32 is located between the refrigerant inlet 50 and the first circulation inlet 46.

[0022] The high-temperature heat pump 31 can adapt to the heat release of 80℃ high-temperature condensate and provide heat to 90-100℃ low-temperature steam to raise it to 110-120℃. Its core feature is that it has a wide-range temperature heat exchange capability. Through refrigerant circulation, it realizes the transfer of "low-grade heat (waste heat of condensate) to high-grade heat (heat of steam)" without relying on municipal pipelines and additional heat sources. At the same time, it can stably reduce the condensate water temperature to 50℃ (as the cleaning water temperature), which meets the energy saving and process temperature requirements in the solution.

[0023] Regarding the high-temperature heat pump 31, its evaporation and condensation sections are explained as follows: The high-temperature heat pump 31 has two channels. The channel containing the heat medium inlet 48 and the heat medium outlet 49 corresponds to the evaporation section. In this embodiment, the heat source entering the evaporation section causes the medium (refrigerant) flowing through the evaporation section to absorb heat and vaporize. Subsequently, the medium passes through the compression module (compressor), changing from a low-temperature, low-pressure gas to a high-temperature, high-pressure gas, and enters the condensation section. The temperature of the medium in this section is higher than the steam temperature, thus transferring heat to the steam, while the medium forms a liquid state. After passing through the throttling module (expansion valve), a low-temperature, low-pressure gas-liquid mixture is formed. The specific working principle of the high-temperature heat pump 31 is existing technology and well known to those skilled in the art, and will not be elaborated here.

[0024] In some embodiments, the high-temperature heat pump 31 described above can be employed as follows: Figure 1 The structure shown. See also Figure 1 The high-temperature heat pump 31 is a high-temperature screw heat pump.

[0025] The high-temperature screw heat pump, specifically type 31, uses a twin-screw compressor as its core power component. Its structure is optimized for high-temperature operating conditions. The cast steel compressor achieves a high compression ratio of 8:1, raising the refrigerant temperature to over 140°C. The shell-and-tube heat exchanger consists of an evaporation section (processing 80°C condensate and cooling it to 50°C) and a condensation section (with baffles, raising the steam temperature to 90-110°C). Combined with a high-temperature electronic expansion valve for precise flow control and the injection of environmentally friendly R1234ze refrigerant (resistant to 220°C), a closed-loop heat cycle is formed. This not only handles fluctuations in condensate flow but also ensures stable steam temperature rise to the target temperature. The high-temperature screw heat pump effectively transfers some of the heat from the condensate to the steam, further raising the temperature of the remaining steam to meet the target requirements.

[0026] In some embodiments, the second circulation port and the first circulation port may be adopted as follows: Figure 1 The structure shown. See also Figure 1 The second circulating water inlet 47 is located above the first circulating water inlet 46. This structure ensures that the condensate in the water storage tank 20 is discharged from the bottom of the tank and enters the high-temperature heat pump 31, and returns to the water storage tank 20 from the top after circulation, thus avoiding uneven heat distribution in the water storage tank 20 and ensuring heat exchange efficiency.

[0027] Example 2 of the heat exchange and heat replenishment system for the pharmaceutical waste steam and condensate recovery and reuse system provided by this utility model: In some embodiments, the heat exchange and heat replenishment unit 30 described above may employ, for example... Figure 2 The structure shown. See also Figure 2The heat exchange and supplementary heat unit 30 includes a high-temperature heat pump 31, a first heat exchanger 33, a second heat exchanger 34, a second circulating pump 35, a third circulating pump 36, and a fourth circulating pump 37. The high-temperature heat pump 31 has a heat medium inlet 48, a heat medium outlet 49, a refrigerant inlet 50, and a refrigerant outlet 51. The first heat exchanger 33 has a first heat medium channel and a first refrigerant channel. The inlet and outlet of the first heat medium channel are connected to the first circulating water inlet 46 and the second circulating water inlet 47, respectively. The inlet and outlet of the first refrigerant channel are connected to the heat medium inlet 48 and the heat medium outlet 49, respectively. The channels containing the heat medium inlet 48 and the heat medium outlet 49 correspond to the evaporation section, and the channels containing the refrigerant inlet 50 and the refrigerant outlet 51 correspond to the condensation section. The second heat exchanger 34 has a second heat medium channel and a second refrigerant channel. The inlet and outlet of the second heat medium channel are connected to the refrigerant inlet 50 and the refrigerant outlet 51, respectively. The inlet of the second refrigerant channel is connected to the steam outlet 42, and the outlet of the second refrigerant channel is connected to the steam pipeline. The second circulation pump 35 is located between the first heat medium passage and the first circulation inlet 46. The third circulation pump 36 is located between the first refrigerant passage and the heat medium inlet 48. The fourth circulation pump 37 is located between the refrigerant outlet 51 and the inlet of the second heat medium passage.

[0028] In this embodiment, a first heat exchanger 33 and a second heat exchanger 34 are added to both sides of the high-temperature heat pump 31, respectively.

[0029] Specifically, the evaporation section of the high-temperature heat pump 31 forms a first closed loop 38 with the first refrigerant channel of the first heat exchanger 33. A heat transfer medium is installed inside, and its circulation is driven by a third circulation pump 36. This method avoids direct contact between condensate and the high-temperature heat pump 31, preventing corrosion and extending its service life. The condensation section of the high-temperature heat pump 31 forms a second closed loop 39 with the second heat transfer medium channel of the second heat exchanger 34. A heat transfer medium is installed inside, and its circulation is driven by a fourth circulation pump 37. This method also avoids direct contact between steam and the high-temperature heat pump 31, preventing corrosion and extending its service life.

[0030] Driven by the second circulation pump 35, condensate discharged from the first circulation port 46 enters the first heat medium channel of the first heat exchanger 33, while condensate discharged from the first heat medium channel returns to the water storage tank 20 through the second circulation port 47. The condensate in the first heat medium channel exchanges heat with the medium transferred in the first refrigerant channel, heating the medium in the first closed loop 38. The heat in the first closed loop 38 is transferred by the high-temperature heat pump 31 to the second closed loop 39, where heat is transferred to the second condensation channel of the second heat exchanger 34. The inlet of the second condensation channel receives steam from the steam outlet 42 and simultaneously transfers the heated steam to the steam pipeline.

[0031] The high-temperature heat pump 31 can adapt to the heat release of 80℃ high-temperature condensate and provide heat to 90-100℃ low-temperature steam to raise it to 110-120℃. Its core feature is that it has a wide-range temperature heat exchange capability. Through refrigerant circulation, it realizes the transfer of "low-grade heat (waste heat of condensate) to high-grade heat (heat of steam)" without relying on municipal pipelines and additional heat sources. At the same time, it can stably reduce the condensate water temperature to 50℃ (as the cleaning water temperature), which meets the energy saving and process temperature requirements in the solution.

[0032] In some embodiments, the first heat exchanger 33 and the second heat exchanger 34 described above may be employed as follows: Figure 2 The structure shown. See also Figure 2 Both the first heat exchanger 33 and the second heat exchanger 34 are tube sheet heat exchangers.

[0033] The tube sheet heat exchanger (a common type of shell and tube heat exchanger) has significant advantages in the implementation of steam recovery for traditional Chinese medicine. It has a simple structure and high reliability. The independent flow channel design of the shell side and tube side can stably accommodate 80°C condensate and 90-110°C steam respectively, avoiding medium mixing. At the same time, the rigid connection between the tube sheet and the heat exchange tubes can withstand thermal expansion and contraction under high temperature conditions. Combined with corrosion-resistant materials such as 304 stainless steel, it can adapt to the slight corrosiveness of condensate. Moreover, it is convenient to clean and maintain in the later stage. It can handle possible slight scaling without complicated disassembly, meeting the core requirement of independent and stable heat exchange (condensate cooling to 50°C, steam heating to 110-120°C).

[0034] In some embodiments, the high-temperature heat pump 31 described above can be employed as follows: Figure 2 The structure shown. See also Figure 2 The high-temperature heat pump 31 is a high-temperature screw heat pump.

[0035] The high-temperature screw heat pump, specifically type 31, uses a twin-screw compressor as its core power component. Its structure is optimized for high-temperature operating conditions. The cast steel compressor achieves a high compression ratio of 8:1, raising the refrigerant temperature to over 140°C. The shell-and-tube heat exchanger consists of an evaporation section (processing 80°C condensate and cooling it to 50°C) and a condensation section (with baffles, raising the steam temperature to 90-110°C). Combined with a high-temperature electronic expansion valve for precise flow control and the injection of environmentally friendly R1234ze refrigerant (resistant to 220°C), a closed-loop heat cycle is formed. This not only handles fluctuations in condensate flow but also ensures stable steam temperature rise to the target temperature. The high-temperature screw heat pump effectively transfers some of the heat from the condensate to the steam, further raising the temperature of the remaining steam to meet the target requirements.

[0036] In some embodiments, the first circulating water inlet 46 and the second circulating water inlet 47 may be adopted as follows: Figure 2 The structure shown. See also Figure 2The second circulating water inlet 47 is located above the first circulating water inlet 46. This structure ensures that the condensate in the water storage tank 20 is discharged from the bottom of the tank and enters the high-temperature heat pump 31, and returns to the water storage tank 20 from the top after circulation, thus avoiding uneven heat distribution in the water storage tank 20 and ensuring heat exchange efficiency.

[0037] 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. A system for recovering and reusing waste steam and condensate from pharmaceutical processes, characterized in that, include: The gas-liquid separator has a material inlet, a steam outlet, and a condensate outlet; A water storage tank having an inlet connected to the condensate outlet; The water storage tank also has a water outlet, a first circulating water inlet and a second circulating water inlet; The heat exchange and heat replenishment unit has an evaporation section and a condensation section; the evaporation section corresponds to the first circulating water inlet and the second circulating water inlet; the condensation section corresponds to the steam outlet and the steam pipeline; the heat exchange and heat replenishment unit is used to absorb part of the heat in the condensate through the evaporation section and replenish the heat to the steam through the condensation section.

2. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 1, characterized in that, The heat exchange and reheating unit includes: A high-temperature heat pump has a heat medium inlet, a heat medium outlet, a refrigerant inlet, and a refrigerant outlet; the channels where the heat medium inlet and the heat medium outlet are located correspond to the evaporation section, the heat medium inlet is connected to the steam outlet, and the heat medium outlet is connected to the steam pipeline; the channels where the refrigerant inlet and the refrigerant outlet are located correspond to the condensation section, the refrigerant inlet is connected to the first circulating water inlet, and the refrigerant inlet is connected to the second circulating water inlet; The first circulating pump is located between the refrigerant inlet and the first circulating water inlet.

3. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 2, characterized in that, The high-temperature heat pump is a high-temperature screw heat pump.

4. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 2, characterized in that, The second circulating water inlet is located above the first circulating water inlet.

5. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 1, characterized in that, The heat exchange and reheating unit includes: High-temperature heat pumps have a heat medium inlet, a heat medium outlet, a refrigerant inlet, and a refrigerant outlet; The first heat exchanger has a first heat medium channel and a first refrigerant channel; the inlet and outlet of the first heat medium channel are respectively connected to the first circulating water inlet and the second circulating water inlet; the inlet and outlet of the first refrigerant channel are respectively connected to the heat medium inlet and the heat medium outlet; the channels where the heat medium inlet and the heat medium outlet are located correspond to the evaporation section, and the channels where the refrigerant inlet and the refrigerant outlet are located correspond to the condensation section. The second heat exchanger has a second heat medium passage and a second refrigerant passage; the inlet and outlet of the second heat medium passage are respectively connected to the refrigerant inlet and the refrigerant outlet; the inlet of the second refrigerant passage is connected to the steam outlet, and the outlet of the second refrigerant passage is connected to the steam pipeline. The second circulating pump is installed between the first heat medium channel and the first circulating water inlet; The third circulation pump is installed between the first refrigerant channel and the heat medium inlet; The fourth circulation pump is located between the refrigerant outlet and the inlet of the second heat medium channel.

6. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 5, characterized in that, Both the first heat exchanger and the second heat exchanger are tube sheet heat exchangers.

7. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 5, characterized in that, The high-temperature heat pump is a high-temperature screw heat pump.

8. The pharmaceutical waste steam and condensate recovery and reuse system as described in claim 5, characterized in that, The second circulating water inlet is located above the first circulating water inlet.

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