Brewing water membrane method continuous deoxidation monitoring device

Abstract

The utility model discloses a continuous deoxidation monitoring device for brewing water by a membrane method. The continuous deoxidation monitoring device comprises a degassing membrane component (1), the outlet end of the water inlet pipeline (2) is connected with the water inlet end of the degassing membrane component (1); the inlet end of the water outlet pipeline (3) is connected with the water outlet end of the degassing membrane assembly (1), and the water outlet pipeline (3) is provided with a dissolved oxygen tester (31); the heat exchanger (4) is provided with a first heat exchange channel (41) and a second heat exchange channel (42) which can exchange heat with each other; at least part of the refrigerant supply pipeline (5) passes through the first heat exchange channel (41); at least part of the water outlet pipeline (3) passes through the second heat exchange channel (42), and the dissolved oxygen tester (31) is located on the downstream of the second heat exchange channel (42). Compared with the prior art, the utility model can avoid the problem that the quality of beer is influenced by the increase of dissolved oxygen caused by temperature reduction in the subsequent use process of brewing water.

Description

Technical Field

[0001] The utility model relates to the technical field of beer production, in particular to a continuous deoxidation monitoring device for brewing water by the membrane method. Background Art

[0002] During the beer production process, deoxygenated water is mainly used for aspects such as high-gravity dilution, beer drawing for bright beer and fermentation broth, and flushing of bright beer tanks and fermentation tanks. Since deoxygenated water directly enters the beer or directly contacts the beer, the oxygen content therein will directly affect the quality of the beer.

[0003] The beer production process has very strict requirements for the dissolved oxygen content in water. Because the dissolved oxygen in water will not only change the color of the beer, cause turbidity, but also destroy the flavor of hops, produce bitterness, and reduce the quality of the beer. Therefore, deoxygenated water plays an extremely important role in the beer production process. It is very important to safely and efficiently remove the dissolved oxygen in the brewing water and accurately detect the dissolved oxygen content in the water for the beer production process.

[0004] At present, the main methods for preparing deoxygenated water are tower deoxidation method and membrane deoxidation. The membrane deoxidation method has low energy consumption, small floor area, and adjustable production scale, and has significant advantages in the production of deoxygenated water, and has a tendency to gradually replace the tower deoxidation method. For example, the Chinese patent "A pure water machine with an online dissolved oxygen monitoring function" with the patent application number CN 202220033362.0 uses a degassing membrane as a degassing device to remove the dissolved gas in the produced water, ensure that the dissolved oxygen value of the produced water meets the requirements, and uses a dissolved oxygen detector to detect the dissolved oxygen in the produced water, so that users can easily master whether the dissolved oxygen value in the pure water exceeds the standard.

[0005] In order to ensure the quality of the beer, the oxygen content in the deoxygenated water required during the beer production process needs to be reduced to 5 ppb or even lower. During the membrane deoxidation process, according to different production capacities, the brewing water usually needs to flow through 1-4 stages of degassing membranes, and the temperature will rise above room temperature after the water flows through the conveying pipeline and multiple membrane surfaces. The increase in temperature will reduce the solubility of oxygen in the water. If the dissolved oxygen content in the water flowing out of the membrane module is directly measured, since the temperature is relatively high at this time, the dissolved oxygen content in the water decreases, resulting in a "low" detection result, that is, the measured dissolved oxygen content in the water at a relatively high temperature is "lower than normal". And during the subsequent use process of the deoxygenated water, the deoxygenated water needs to be cooled to an appropriate temperature. As the water temperature decreases, the solubility of oxygen in the water increases. For example, at 2.2 °C, the saturated dissolved oxygen in water is 13.7 ppm, while at 20 °C, the saturated dissolved oxygen in water is 8.9 ppm. Therefore, if the dissolved oxygen content of the deoxygenated water flowing out of the membrane module is directly measured, the dissolved oxygen content therein may be lower than the specified value at a relatively high temperature. However, if this deoxygenated water is applied to the subsequent beer production process, it may affect the beer quality due to the subsequent decrease in water temperature and the "exceeding standard" of the oxygen content in the water. Summary of the Utility Model

[0006] The first technical problem to be solved by the present utility model is to provide a brewing water membrane method continuous deoxidation monitoring device that can avoid the increase in dissolved oxygen caused by the decrease in temperature during the subsequent use of brewing water, thereby affecting the quality of beer, in view of the current situation of the prior art.

[0007] The second technical problem to be solved by the present utility model is to provide a brewing water membrane method continuous deoxidation monitoring device that can ensure a constant dissolved oxygen content in the subsequent deoxidized water.

[0008] The technical solution adopted by the present utility model to solve the above first technical problem is as follows: A brewing water membrane method continuous deoxidation monitoring device includes

[0009] A degassing membrane module for removing oxygen from water, having an inlet end and an outlet end;

[0010] An inlet water pipeline, whose outlet end is connected to the inlet end of the degassing membrane module; and

[0011] An outlet water pipeline, whose inlet end is connected to the outlet end of the degassing membrane module, and a dissolved oxygen analyzer is installed on this outlet water pipeline;

[0012] It is characterized in that it further includes

[0013] A heat exchanger, which has a first heat exchange channel and a second heat exchange channel that can exchange heat with each other inside; and

[0014] A refrigerant supply pipeline, at least part of which passes through the first heat exchange channel;

[0015] At least part of the outlet water pipeline passes through the second heat exchange channel, and the dissolved oxygen analyzer is located downstream of the second heat exchange channel.

[0016] In order to monitor the flow rate of the deoxidized water flowing through the heat exchanger, a flow switch is installed on the outlet water pipeline, and this flow switch is installed downstream of the second heat exchange channel.

[0017] In order to monitor the temperature of the deoxidized water after heat exchange, a temperature measuring instrument is installed on the outlet water pipeline, and this temperature measuring instrument is located downstream of the second heat exchange channel.

[0018] In order to facilitate the adjustment of the heat exchange effect, a flow regulating valve is installed on the refrigerant supply pipeline, and this flow regulating valve is installed upstream of the first heat exchange channel.

[0019] In order to further solve the above second technical problem, the brewing water membrane method continuous deoxidation monitoring device has a controller, and the flow switch, the temperature measuring instrument and the flow regulating valve are all electrically connected to this controller, so that the controller can receive the flow signal collected by the flow switch and the temperature signal collected by the temperature measuring instrument and control the opening and closing degree of the flow regulating valve.

[0020] To achieve the output and reflux of deoxygenated water, it further includes

[0021] a return water pipeline, whose inlet end is connected to the outlet end of the water outlet pipeline, and whose outlet end is connected to the water inlet end of the degassing membrane module; and

[0022] a deoxygenated water output pipeline, whose inlet end is connected to the outlet end of the water outlet pipeline.

[0023] To facilitate the switching of the output and reflux of deoxygenated water, a second valve is installed on the return water pipeline, and a third valve is installed on the deoxygenated water output pipeline.

[0024] To automatically switch the output and reflux of deoxygenated water according to the dissolved oxygen content, the continuous deoxygenation monitoring device for brewing water by membrane method has a controller, and the dissolved oxygen analyzer, the second valve and the third valve are all electrically connected to the controller, so that the controller can receive the signals collected by the dissolved oxygen analyzer and control the opening and closing of the second valve and the third valve.

[0025] To simplify the pipeline, the return water pipeline and the water inlet pipeline share the same downstream section, and the second valve is located in the upstream section of the return water pipeline.

[0026] To facilitate the discharge of oxygen, the degassing membrane module further has an air inlet end and an air outlet end, and the continuous deoxygenation monitoring device for brewing water by membrane method further includes

[0027] an air inlet pipeline, whose outlet end is connected to the air inlet end of the degassing membrane module; and

[0028] an air outlet pipeline, whose inlet end is connected to the air outlet end of the degassing membrane module.

[0029] To promote the deoxygenation effect, a vacuum pump is installed on the air outlet pipeline.

[0030] Compared with the prior art, the advantages of the present utility model are as follows:

[0031] (1) The degassing membrane module is adopted to remove the dissolved oxygen in water. Considering that the temperature of water rises due to frictional resistance in the pipeline and the degassing membrane module during transportation, the oxygen content in the water at the outlet of the degassing membrane is not directly measured. Instead, the water leaving the degassing membrane module is cooled by heat exchange with the cold material in the refrigerant supply pipeline through a heat exchanger, and then the dissolved oxygen content in it is measured. At this time, the dissolved oxygen content in the water can represent the true dissolved oxygen content during the subsequent use of deoxygenated water.

[0032] (2) Monitor the flow rate of deoxygenated water entering the heat exchanger through a flow switch, and monitor the temperature of the deoxygenated water after heat exchange through a thermometer. Feed back signals based on the flow rate and temperature to the flow regulating valve on the refrigerant supply pipeline to adjust the flow rate of the cold material, thereby adjusting the heat exchange effect. This not only ensures a constant water temperature when monitoring the dissolved oxygen content, thus ensuring that the dissolved oxygen in the water is always maintained at a stable value, minimizing the impact on beer quality to the greatest extent, but also prevents the occurrence of ice formation in the heat exchanger caused by only refrigerant flowing while there is no water flow on the water side. Brief Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of an embodiment of the continuous deoxygenation monitoring device for brewing water film method of the present invention. Detailed Description of the Preferred Embodiment

[0034] The present invention will be further described in detail below in conjunction with the embodiments of the drawings.

[0035] In the description and claims of the present invention, terms indicating directions such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc. are used to describe various example structural parts and elements of the present invention. However, these terms are used here only for the convenience of description and are determined based on the example orientations shown in the drawings. Since the embodiments disclosed by the present invention can be arranged in different directions, these terms indicating directions should only be regarded as illustrative and not restrictive. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0036] As Figure 1 shown, it is a preferred embodiment of the continuous deoxygenation monitoring device for brewing water film method of the present invention. The continuous deoxygenation monitoring device for brewing water film method includes a degassing membrane assembly 1, a water inlet pipeline 2, a water outlet pipeline 3, a heat exchanger 4, a refrigerant supply pipeline 5, a return water pipeline 6, a deoxygenated water output pipeline 7, an air inlet pipeline 8, and an air outlet pipeline 9.

[0037] Among them, the degassing membrane assembly 1 is used to remove oxygen in water and has a water inlet end, a water outlet end, an air inlet end, and an air outlet end. According to different brewing water treatment volumes, the degassing membrane assembly 1 contains several groups of parallel degassing membranes; in beer production, the dissolved oxygen content in deoxygenated water needs to be lower than 5 ppb. Generally, several degassing membranes need to be connected in series for each group to remove the oxygen in the brewing water to below 5 ppb; at the same time, due to pressure drop losses, the series connection stage of the degassing membrane generally does not exceed four levels.

[0038] The outlet end of the water inlet pipeline 2 is connected to the water inlet end of the degassing membrane assembly 1, and a first valve 21 is installed in the upstream section of the water inlet pipeline 2.

[0039] The inlet end of the outlet water pipe 3 is connected to the outlet end of the degassing membrane module 1. A dissolved oxygen detector 31, a temperature detector 32 and a flow switch 33 are installed on the outlet water pipe 3.

[0040] The heat exchanger 4 is a plate heat exchanger, and it has a first heat exchange channel 41 and a second heat exchange channel 42 that can exchange heat with each other inside.

[0041] A flow regulating valve 51 is installed on the refrigerant supply pipe 5. A part of the refrigerant supply pipe 5 passes through the above-mentioned first heat exchange channel 41, and the flow regulating valve 51 is installed upstream of the first heat exchange channel 41; a part of the outlet water pipe 3 passes through the above-mentioned second heat exchange channel 42, and the dissolved oxygen detector 31, the temperature detector 32 and the flow switch 33 are all located downstream of the second heat exchange channel 42.

[0042] The inlet end of the return water pipe 6 is connected to the outlet end of the outlet water pipe 3, and the outlet end is connected to the inlet end of the degassing membrane module 1. A second valve 61 is installed on the upstream section of the return water pipe 6. In this embodiment, the return water pipe 6 and the inlet water pipe 2 share the same downstream section.

[0043] The inlet end of the deoxygenated water output pipe 7 is connected to the outlet end of the outlet water pipe 3. A third valve 71 is installed on the deoxygenated water output pipe 7.

[0044] The outlet end of the inlet air pipe 8 is connected to the inlet air end of the degassing membrane module 1.

[0045] The inlet end of the outlet air pipe 9 is connected to the outlet air end of the degassing membrane module 1. A vacuum pump 91 is installed on the outlet air pipe 9.

[0046] In addition, the above-mentioned brewing water film method continuous deoxygenation monitoring device has a controller. The temperature detector 32, the flow switch 33 and the flow regulating valve 51 are all electrically connected to the controller, so that the controller can receive the flow signal collected by the flow switch 33 and the temperature signal collected by the temperature detector 32 and control the opening and closing degree of the flow regulating valve 51. The dissolved oxygen detector 31, the second valve 61 and the third valve 71 are all electrically connected to the controller, so that the controller can receive the signal collected by the dissolved oxygen detector 31 and control the opening and closing of the second valve 61 and the third valve 71.

[0047] The working principle of this embodiment is as follows:

[0048] (1) Start the first valve 21. The brewing water in the brewery enters the degassing membrane module 1 through the water inlet pipeline 2 (the degassing membrane module 1 contains several hollow fiber membrane filaments), flows through one side surface of the hollow fiber membrane filaments. At the same time, the high-purity purge gas enters the degassing membrane module 1 through the gas inlet pipeline 8, flows through the other side surface of the hollow fiber membrane filaments. The oxygen in the water permeates through the membrane pores into the other side of the hollow fiber membrane, is carried away by the high-purity purge gas and leaves the degassing membrane module 1 through the gas outlet pipeline 9. The negative pressure generated by the vacuum pump 91 helps to promote the flow of the purge gas on the membrane surface and enhance the deoxidation effect;

[0049] (2) After the brewing water flows through several series-connected membranes and other pipelines in the degassing membrane module 1, due to resistance losses and other reasons, its temperature will rise. That is, the temperature of the deoxygenated brewing water, which is the deoxygenated water flowing out of the degassing membrane module 1 through the water outlet pipeline 3, will be higher than room temperature. After the deoxygenated water flows out through the water outlet pipeline 3, it enters the heat exchanger 4. After the flow switch 33 monitors the water-side flow rate, it feeds back a signal to the flow regulating valve 51. The flow regulating valve opens the refrigerant switch according to the feedback water-side flow rate information to prevent the occurrence of ice formation in the heat exchanger caused by only refrigerant flowing while there is no water flow on the water side. After the deoxygenated water enters the heat exchanger 4, it exchanges heat with the ethylene glycol in the refrigerant supply pipeline 5 in a countercurrent manner. The temperature of the deoxygenated water after heat exchange is monitored by the thermometer 32. If the temperature is higher or lower than 2°C, a signal is fed back to the flow regulating valve 51. The flow regulating valve 51 automatically adjusts the flow rate of ethylene glycol according to the temperature feedback from the thermometer 32 and the flow rate feedback from the flow switch 33, and controls the temperature of the deoxygenated water at a constant value;

[0050] (3) The oxygen content in the cooled deoxygenated water is measured by the dissolved oxygen analyzer 31. If the oxygen content is lower than 5 ppb, the second valve 61 is closed and the third valve 71 is opened. The deoxygenated water flows through the deoxygenated water output pipeline 7 and is transported to the next process section or collected and stored for standby. If the oxygen content in the deoxygenated water is higher than 5 ppb at this time, the third valve 71 is closed and the second valve 61 is opened. The deoxygenated water is transported back to the degassing membrane module 1 through the return water pipeline 6 for deoxygenation. The deoxygenated water continues the above steps. Whether the deoxygenated water meets the standard is judged based on the dissolved oxygen content in the cooled water, and it is transported to the next process section or continues to be deoxygenated according to the result.

[0051] For the above solution, since high-concentration beer dilution and filling are carried out at a relatively low temperature, it is more in line with the actual application situation to determine whether the next operation process is to transport it back to the degassing membrane module for deoxygenation or directly transport it to the next section based on whether the dissolved oxygen content in the deoxygenated water after cooling meets the standard. This solves the problem that the value of the dissolved oxygen content in the deoxygenated water flowing out of the degassing membrane is "low" when directly measured, and the dissolved oxygen increases due to the temperature decrease during subsequent use, thus affecting the beer quality. At the same time, to ensure the stability of beer quality, the temperature of the deoxygenated water and the dissolved oxygen content in the water need to be kept stable. Therefore, a flow switch 33 and a temperature measuring instrument 32 are set on the outlet water pipe 2 after heat exchange to monitor the flow rate and temperature of the deoxygenated water, and the flow rate of the refrigerant ethylene glycol is adjusted according to the flow rate and temperature feedback signals to the refrigerant supply pipe 5, thereby adjusting the heat exchange effect and controlling the temperature of the final outlet deoxygenated water. By controlling the temperature of the outlet deoxygenated water to be constant, the actual dissolved oxygen content in the water during the operation of the subsequent section is ensured to be constant, which is beneficial to ensuring the stability of beer quality in the subsequent section.

Claims

1. A continuous deoxygenation monitoring device using a brewing water film method, comprising a degassing membrane assembly (1) for removing oxygen from water, having a water inlet end and a water outlet end; a water inlet pipeline (2) whose outlet end is connected to the water inlet end of the degassing membrane assembly (1); and a water outlet pipeline (3) whose inlet end is connected to the water outlet end of the degassing membrane assembly (1), and a dissolved oxygen analyzer (31) is installed on the water outlet pipeline (3); It is characterized in that: It further comprises a heat exchanger (4) having a first heat exchange channel (41) and a second heat exchange channel (42) capable of exchanging heat with each other inside; and a refrigerant supply pipeline (5), at least a part of which passes through the first heat exchange channel (41); At least a part of the water outlet pipeline (3) passes through the second heat exchange channel (42), and the dissolved oxygen analyzer (31) is located downstream of the second heat exchange channel (42).

2. The continuous deoxygenation monitoring device by the brewing water film method according to claim 1, characterized in that: A flow switch (33) and a temperature measuring instrument (32) are installed on the water outlet pipeline (3), and the flow switch (33) and the temperature measuring instrument (32) are located downstream of the second heat exchange channel (42).

3. The continuous deoxidation monitoring device by the brewing water film method according to claim 2, characterized in that: A flow regulating valve (51) is installed on the refrigerant supply pipeline (5), and the flow regulating valve (51) is installed upstream of the first heat exchange channel (41).

4. The continuous deoxygenation monitoring device by the brewing water film method according to claim 3, characterized in that: The continuous deoxygenation monitoring device using the brewing water film method has a controller, and the flow switch (33), the temperature measuring instrument (32) and the flow regulating valve (51) are all electrically connected to the controller, so that the controller can receive the flow signal collected by the flow switch (33) and the temperature signal collected by the temperature measuring instrument (32) and control the opening and closing degree of the flow regulating valve (51).

5. The continuous deoxidation monitoring device by the brewing water film method according to claim 1, characterized in that: It further comprises a return water pipeline (6) whose inlet end is connected to the outlet end of the water outlet pipeline (3) and whose outlet end is connected to the water inlet end of the degassing membrane assembly (1); and a deoxygenated water output pipeline (7) whose inlet end is connected to the outlet end of the water outlet pipeline (3).

6. The continuous deoxidation monitoring device by the brewing water film method according to claim 5, characterized in that: A second valve (61) is installed on the return water pipeline (6), and a third valve (71) is installed on the deoxygenated water output pipeline (7).

7. The continuous deoxidation monitoring device by the brewing water film method according to claim 6, characterized in that: The continuous deoxygenation monitoring device using the brewing water film method has a controller, and the dissolved oxygen analyzer (31), the second valve (61) and the third valve (71) are all electrically connected to the controller, so that the controller can receive the signal collected by the dissolved oxygen analyzer (31) and control the opening and closing of the second valve (61) and the third valve (71).

8. The continuous deoxidation monitoring device by the brewing water film method according to claim 6, characterized in that: The return water pipeline (6) and the water inlet pipeline (2) share the same downstream section, and the second valve (61) is located in the upstream section of the return water pipeline (6).

9. The continuous deoxidation monitoring device by the brewing water film method according to any one of claims 1 to 8, characterized in that: The degassing membrane assembly (1) further has an air inlet end and an air outlet end, and the continuous deoxygenation monitoring device using the brewing water film method further comprises an air inlet pipeline (8) whose outlet end is connected to the air inlet end of the degassing membrane assembly (1); and an air outlet pipeline (9) whose inlet end is connected to the air outlet end of the degassing membrane assembly (1).

10. The continuous deoxygenation monitoring device by the brewing water film method according to claim 9, characterized in that: A vacuum pump (91) is installed on the air outlet pipeline (9).

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