Efficient steam heat pump system

Abstract

The utility model discloses an efficient steam heat pump system which comprises a boiling pot, a steam ejector, an outer heater, a main steam pipeline, a secondary steam pipeline, a mixed steam pipeline, a first wort circulating pipeline and a second wort circulating pipeline. Main steam and secondary steam can be mixed together through the steam ejector, the main steam pipeline and the secondary steam pipeline, and are conveyed into the outer shell of the outer heater to realize heat exchange with wort in the heat exchanger, so that the wort is heated, and the heated wort is conveyed into the boiling pot through the second wort circulating pipeline; the steam generated in the boiling pot is discharged in time, the discharged steam can be used for heat exchange of wort again, and due to the fact that the steam generated in the boiling pot is recycled all the time, steam consumption is reduced, and the steam consumption is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of heat pump technology, and in particular to a high-efficiency steam heat pump system. Background Technology

[0002] Currently, most breweries use built-in heaters in boiling kettles for wort saccharification, which consumes a large amount of steam. Furthermore, due to the high steam pressure and temperature, scale easily forms on the surface of the built-in heater, thus affecting its heat exchange efficiency. Utility Model Content

[0003] This application provides a high-efficiency steam heat pump system, including:

[0004] A boiling kettle for boiling wort, the boiling kettle having an internal heater, a steam outlet, a wort outlet, and a wort reflux outlet.

[0005] The steam ejector is a Venturi-type steam ejector, which includes an inlet section, a contraction section, a negative pressure section, and a diffusion section.

[0006] An external heater includes an outer shell and a heat exchanger disposed within the outer shell. The heat exchanger has a heat exchange inlet and a heat exchange outlet on the outer shell. The outer shell is also provided with a mixed steam inlet and a liquid drain outlet.

[0007] The main steam pipeline is connected to the inlet section and is used to connect with external steam.

[0008] A secondary steam pipeline connects to the steam outlet and the negative pressure section;

[0009] A mixing steam pipe connects the mixing steam inlet and the diffuser section;

[0010] The first wort circulation pipe is connected to the heat exchange inlet and the wort outlet;

[0011] The second wort circulation pipe is connected to the heat exchange outlet and the wort return port.

[0012] In some embodiments, a first flow meter and a first regulating valve are provided on the main steam pipeline, and a second regulating valve is provided on the secondary steam pipeline.

[0013] In some embodiments, a second flow meter is provided on the mixing steam pipe.

[0014] In some embodiments, at least one of the first wort circulation pipe and the second wort circulation pipe is provided with a circulation pump.

[0015] In some embodiments, a steam replenishment pipe is also included, one end of which is connected to the main steam pipe and the other end of which is connected to the diffuser section.

[0016] In some embodiments, a condensate tank is also included, which is located below the external heater along the direction of gravity, and the drain outlet is located on the lower surface of the outer casing, and the drain outlet is connected to the condensate tank through a pipe.

[0017] The high-efficiency steam heat pump system based on the embodiments of this application includes a boiling kettle, a steam ejector, an external heater, a main steam pipe, a secondary steam pipe, a mixing steam pipe, a first wort circulation pipe, and a second wort circulation pipe. The wort in the boiling kettle is fed into the heat exchanger in the external heater through the first wort circulation pipe. The main steam and secondary steam are mixed together by the steam ejector, the main steam pipe, and the secondary steam pipe and transported to the outer shell of the external heater to exchange heat with the wort in the heat exchanger, thereby heating the wort. The heated wort is then transported back to the boiling kettle through the second wort circulation pipe, and the generated steam is discharged in time. The discharged steam can be reused to exchange heat with the wort. Because the steam generated in the boiling kettle is continuously recycled and reused, steam consumption is reduced, resulting in a significant reduction in steam consumption. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 application. 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 the structure of a high-efficiency steam heat pump system provided in an embodiment of this application;

[0020] Figure reference numerals:

[0021] 10. Boil the pot;

[0022] 20. Steam ejector;

[0023] 30. External heater; 31. Heat exchange inlet; 32. Heat exchange outlet; 33. Mixed steam inlet; 34. Drain outlet;

[0024] 40. Main steam pipe; 41. First flow meter; 42. First regulating valve;

[0025] 50. Secondary steam pipeline; 51. Second regulating valve;

[0026] 60. Mixing steam pipeline; 61. Second flow meter;

[0027] 70. First wort circulation pipe; 71. Circulation pump;

[0028] 80. Second wort circulation pipe;

[0029] 90. Steam supply pipeline;

[0030] 100. Condensate tank. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] Please see Figure 1 This application provides a high-efficiency steam heat pump system, including a boiling pot 10, a steam ejector 20, an external heater 30, a main steam pipe 40, a secondary steam pipe 50, a mixing steam pipe 60, a first wort circulation pipe 70, and a second wort circulation pipe 80.

[0033] The boiling vessel 10 is used to boil the wort, completing the wort boiling process. The boiling vessel 10 has a steam outlet, a wort outlet, and a wort return port. The steam outlet discharges the high-temperature secondary steam generated during the boiling process. The wort outlet outputs the wort to the first wort circulation pipe 70. The wort return port is used to return the wort. It should be understood that the entire boiling vessel 10 should also have an inlet and an outlet. The inlet is used to input the wort to be boiled, and the outlet is used to output the boiled wort to the next process.

[0034] The steam ejector 20 is a Venturi-type steam ejector 20. The steam ejector 20 includes an inlet section, a contraction section, a negative pressure section, and a diffusion section along the airflow direction of the main steam. The inlet section is connected to the main steam pipe 40, which in turn is connected to external steam. That is, the inlet section can receive high-pressure main steam (from an external steam source) to provide ejection power. In the contraction section, the main steam velocity increases, and pressure energy is converted into kinetic energy. The negative pressure section is connected to the secondary steam pipe 50. The high-speed flowing main steam generates a low-pressure zone in the negative pressure section, drawing in the secondary steam discharged from the boiling pot 10. In the diffusion section, the main steam and secondary steam mix and decelerate, and the pressure rises to form usable mixed steam.

[0035] The Venturi effect is existing technology, so it will not be explained in detail here. Figure 1 The steam ejector 20 shown in the diagram is only a schematic diagram and does not strictly distinguish between the inlet section, the contraction section, the negative pressure section and the diffusion section.

[0036] The external heater 30 includes an outer shell and a heat exchanger (not shown in the figure) disposed within the outer shell. The heat exchanger has a heat exchange inlet 31 and a heat exchange outlet 32 ​​on the outer shell. The heat exchanger can be a tubular heat exchanger or a plate heat exchanger, which is not limited here, as long as it can meet the heat exchange requirements. The outer shell forms a heat exchange cavity. The outer shell is also provided with a mixed steam inlet 33 and a drain outlet 34, and both the mixed steam inlet 33 and the drain outlet 34 are connected to the heat exchange cavity. The mixed steam inlet 33 is connected to a mixed steam pipe 60, and the mixed steam pipe 60 is also connected to a diffuser section. In this way, the mixed steam can enter the heat exchange cavity.

[0037] The heat exchanger inlet 31 is connected to the first wort circulation pipe 70, and the heat exchange outlet 32 ​​is connected to the second wort circulation pipe 80. The second wort circulation pipe 80 is also connected to the wort return port. It should be understood that the heat exchanger is located inside the heat exchange chamber, but the flow channel inside the heat exchanger is not connected to the heat exchange chamber. Therefore, the wort discharged through the boiling pot 10 exchanges heat with the mixed steam in the heat exchange chamber inside the heat exchanger. After the heat exchange is completed, the wort with the increased temperature flows back into the boiling pot 10, while the temperature of the mixed steam decreases and forms condensate, which can be discharged from the drain port 34.

[0038] In this embodiment, the steam generated by the boiling pot 10 is drawn in and compressed by the steam injector 20, which not only reduces the temperature of the boiling pot 10 and the possibility of scorching, but also allows the generated steam to participate in heat exchange, reducing the demand for external steam and improving resource utilization.

[0039] In addition, the condensate is centrally treated through the drain outlet 34 to avoid the waste of heat and water resources caused by direct steam discharge.

[0040] Optionally, the main steam pipeline 40 is equipped with a first flow meter 41 and a first regulating valve 42, and the secondary steam pipeline 50 is equipped with a second regulating valve 51. The first regulating valve 42 can adjust the main steam supply according to the real-time demand of the system to avoid excessive steam entering the ejector and causing energy waste or pressure fluctuations. The main steam flow is monitored by the first flow meter 41 to ensure stable pressure at the inlet section of the steam ejector 20 and improve ejector efficiency (such as the Venturi effect depending on stable inlet pressure).

[0041] Furthermore, the main steam flow rate directly affects the steam ejector 20's ability to draw secondary steam. By adjusting the main steam flow rate, the pressure and temperature of the mixed steam can be optimized, allowing the external heater 30 to operate within its optimal heat exchange efficiency range.

[0042] The second regulating valve 51 dynamically adjusts the secondary steam extraction amount according to the steam output of the boiling pot 10, ensuring that the negative pressure section of the steam ejector 20 works effectively and avoiding direct discharge or condensation loss of secondary steam.

[0043] In this embodiment, the flow rates of main steam and secondary steam are adjusted in conjunction with the control system. For example, when the steam output of the boiling pot 10 increases, the second regulating valve 52 opens wider, and the first regulating valve 42 adjusts the main steam flow rate synchronously to maintain stable ejector efficiency.

[0044] Furthermore, a second flow meter 61 is installed on the mixing steam pipe 60. The second flow meter 61 measures the flow rate of the mixed steam in real time, providing accurate heat input data for the external heater 30. Through correlation analysis of flow rate with temperature and pressure, the enthalpy value of the mixed steam can be calculated to ensure that the heat exchanger operates under the design load. If the mixed steam flow rate is lower than expected (e.g., due to a decrease in ejector efficiency), the system can adjust the main steam or secondary steam valves in a coordinated manner to maintain the heat exchange efficiency of the external heater 30 and avoid insufficient wort preheating leading to increased energy consumption in the boiling pot 10.

[0045] The data from the second flow meter 61 is linked with that from the first flow meter 41, forming a dual feedback mechanism. When the mixed steam flow rate is too low, the system automatically opens the first regulating valve 42 (to increase the main steam) or the second regulating valve 52 (to enhance the secondary steam extraction) to ensure stable output from the steam ejector 20. If the flow rate is too high (e.g., excessive main steam), an alarm may be triggered or the main steam valve may be automatically closed to prevent overpressure in the external heater 30.

[0046] In one embodiment of this application, at least one of the first wort circulation pipe 70 and the second wort circulation pipe 80 is provided with a circulation pump 71. That is, the first wort circulation pipe 70 is provided with a circulation pump 71, or the second wort circulation pipe 80 is provided with a circulation pump 71, or both the first wort circulation pipe 70 and the second wort circulation pipe 80 are provided with circulation pumps 71. By providing circulation pumps 71, the wort is ensured to flow efficiently between the boiling pot 10 and the external heater 30, which is especially suitable for long-distance or vertical pipes.

[0047] Furthermore, the circulation pump 71 can quickly adjust the circulation volume according to production needs (such as wort batch size and concentration variations). For example, high-concentration wort requires a larger circulation volume to improve preheating efficiency.

[0048] In one embodiment of this application, the high-efficiency steam heat pump system further includes a steam replenishment pipe 90, one end of which is connected to the main steam pipe 40 and the other end of which is connected to the diffuser section.

[0049] Due to the structure of the steam ejector 20, the amount of main steam entering the inlet section is limited. When the mixed steam flow rate is low, it can be compensated for by the steam supplement pipe 90. By adjusting the amount of supplementary steam, the system can flexibly adapt to different process requirements (such as changes in wort concentration and boiling intensity). For example, if a higher preheating temperature is required for high-concentration wort, the supplementary steam can be increased to improve the heat exchange capacity.

[0050] Please continue reading. Figure 1 In one embodiment of this application, a condensate tank 100 is also included. The condensate tank 100 is disposed below the external heater 30 along the direction of gravity. The drain port 34 is disposed on the lower surface of the outer shell and is connected to the condensate tank 100 through a pipe.

[0051] In this way, the condensate tank 100 can discharge the condensate in the external heater 30 in a timely manner, ensuring heat exchange efficiency. The condensate tank 100 can also collect the condensate, improving resource utilization.

[0052] Since the condensate tank 100 is located below the external heater 30 along the direction of gravity, and the drain port 34 is located at the lowest point (lower surface) of the outer shell, it ensures that the condensate is completely drained and prevents the "water seal" phenomenon.

[0053] The condensate tank 100 can be integrated with a water level sensor to deliver condensate to the boiler feedwater system, realizing closed-loop utilization of water resources.

[0054] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high efficiency vapour heat pump system characterised in that, The utility model relates to a kind of beer brewing system, including: Boiling pot for wort boiling, the boiling pot has steam outlet, wort outlet and wort reflux port; Steam ejector, for Venturi steam ejector, the steam ejector includes inlet section, contraction section, negative pressure section and diffusion section; External heater, including shell and heat exchanger in shell, the heat exchanger forms heat exchange import and heat exchange export on shell, mixed steam import and liquid discharge port are also provided on the shell; Main steam pipeline, in communication with the inlet section, and for communicating with external steam; Secondary steam pipeline, in communication with the steam outlet and negative pressure section; Mixed steam pipeline, in communication with the mixed steam import and the diffusion section; First wort circulation pipeline, in communication with the heat exchange import and the wort outlet; Second wort circulation pipeline, in communication with the heat exchange export and the wort reflux port.

2. The high efficiency vapour heat pump system of claim 1, wherein, First flow meter and first regulating valve are provided on the main steam pipeline, and second regulating valve is provided on the secondary steam pipeline.

3. The high efficiency vapour heat pump system of claim 2, wherein, Second flow meter is provided on the mixed steam pipeline.

4. The high efficiency vapour heat pump system of claim 1, wherein, At least one of the first wort circulation pipeline and the second wort circulation pipeline is provided with circulation pump.

5. The high efficiency vapour heat pump system of claim 1, wherein, Steam supplement pipeline is also included, one end of the steam supplement pipeline is in communication with the main steam pipeline, and the other end is in communication with the diffusion section.

6. The high efficiency vapour heat pump system of claim 1, wherein, Condensate tank is also included, the condensate tank is arranged below the external heater along the direction of gravity, the liquid discharge port is arranged on the lower surface of the shell, and the liquid discharge port is in communication with the condensate tank through pipeline.

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