High-temperature digestion device

Abstract

The utility model relates to the technical field of water quality monitors, and provides a high-temperature digestion device which comprises a first shell, a digestion tank and a cooling assembly, and the digestion tank is arranged in the first shell; the cooling assembly comprises a cooling pipe, a liquid storage tank and a driver, the liquid storage tank is used for storing cooling liquid, the cooling pipe is wound around the digestion tank, an inlet of the cooling pipe is located at the bottom of the liquid storage tank and submerged in the cooling liquid, and an outlet of the cooling pipe is formed in the top of the liquid storage tank and located above the cooling liquid; the two ends of the driver communicate with an inlet and an outlet of the cooling pipe correspondingly. The cooling pipe is wound on the digestion tank in the first shell, the driver is used for driving the cooling liquid in the liquid storage tank to circulate in the cooling pipe, heat in the digestion tank is taken away, the digestion tank in a closed environment is rapidly cooled, the speed is high, the period is short, and therefore the requirement for high-frequency measurement of the water quality monitor is met.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality monitors, in particular to a high-temperature digestion device. Background Art

[0002] Chemical oxygen demand, total phosphorus, total nitrogen, and total heavy metal monitors are instruments used to monitor the concentration of corresponding substances in water, and all require heating under high temperature and high pressure for digestion. For example, total phosphorus, total nitrogen, chemical oxygen demand, total lead, total cadmium, etc. need to be digested under high temperature and high pressure before analysis and determination. The chemical oxygen demand of the water quality online analyzer needs to be heated to at least 165 °C in the digestion tank, and total phosphorus and total nitrogen need to be heated to 120 °C and 122 °C respectively. Often, in order to make the digestion efficiency consistent for each measurement, the target digestion temperature needs to be maintained within ±1 °C, etc. After digestion is completed, it is necessary to quickly cool down, and the temperature needs to be cooled down to a constant temperature and maintained within ±1 degree Celsius.

[0003] At present, the cooling of the high-temperature digestion of water quality in traditional water quality monitors on the market is achieved by a cooling fan to achieve constant temperature reduction and cooling after high-temperature digestion. This application is in traditional chemical oxygen demand online analyzers, total phosphorus online analyzers, total nitrogen online analyzers, and total heavy metal online analyzers. The heat can be dissipated into the surrounding environment, and the cooling process takes a long time.

[0004] Among them, the time for maintaining constant temperature and cooling both belong to the measurement time of the water quality online analyzer. If the constant temperature is reduced, and the high-temperature digestion is naturally dissipated or cooled by a cooling fan, it is a very long process, especially for the water quality nutrient analyzer, which takes even longer. Because the water quality nutrient analyzer needs to be placed in seawater for testing, the whole instrument is IP68 waterproof, and the structure is a closed cylindrical shape. Then, for the constant temperature reduction and the natural dissipation of high-temperature digestion and the cooling by a cooling fan, the heat will be difficult to be quickly released to the outside world, which will cause the measurement time of the water quality total phosphorus and total nitrogen analyzers to be up to several hours. On the one hand, the waiting time for maintenance personnel to maintain the instrument is very long, and on the other hand, it cannot meet the need for high-frequency measurement. Summary of the Utility Model

[0005] The utility model provides a high-temperature digestion device to solve the problem that the high-temperature digestion device in the prior art has a slow cooling speed and a long cycle in a closed environment, resulting in the water quality monitor being unable to meet the high-frequency measurement requirements.

[0006] The present utility model provides a high-temperature digestion device, comprising: a first housing, a digestion tank, and a cooling assembly. The digestion tank is disposed within the first housing. The cooling assembly includes a cooling pipe, a liquid storage tank, and a driver. The liquid storage tank is used for storing a coolant. The cooling pipe is wound around the digestion tank. The inlet of the cooling pipe is located at the bottom of the liquid storage tank and submerged in the coolant. The outlet of the cooling pipe is disposed at the top of the liquid storage tank, above the coolant. Both ends of the driver are respectively communicated with the inlet and the outlet of the cooling pipe.

[0007] A high-temperature digestion device according to the present utility model further includes a heat transfer member. The heat transfer member is disposed on the outer wall surface of the digestion tank and contacts the cooling pipe.

[0008] A high-temperature digestion device according to the present utility model further includes a limiting member. The limiting member is disposed on the outer wall surface of the digestion tank for restricting the cooling pipe.

[0009] A high-temperature digestion device according to the present utility model further includes a first sealing member. The inlet and the outlet of the cooling pipe respectively pass through the first housing via the first sealing member.

[0010] A high-temperature digestion device according to the present utility model further includes a temperature sensor. The temperature sensor is disposed within the digestion tank.

[0011] A high-temperature digestion device according to the present utility model further includes a heating assembly. The heating assembly is connected to the digestion tank.

[0012] A high-temperature digestion device according to the present utility model further includes a control assembly. The temperature sensor, the heating assembly, and the driver are respectively connected to the control assembly. The control assembly controls the operating parameters of the driver and the heating assembly based on the temperature information of the temperature sensor.

[0013] A high-temperature digestion device according to the present utility model further includes an upper high-temperature and high-pressure valve and a lower high-temperature and high-pressure valve. The upper high-temperature and high-pressure valve and the lower high-temperature and high-pressure valve are respectively disposed at two ends of the digestion tank. The upper high-temperature and high-pressure valve and the lower high-temperature and high-pressure valve are respectively electrically connected to the control assembly.

[0014] A high-temperature digestion device according to the present utility model further includes a second housing. The first housing and the driver are both disposed within the second housing.

[0015] A high-temperature digestion device according to the present utility model further includes a second sealing member. The inlet and the outlet of the cooling pipe respectively pass through the second housing via the second sealing member.

[0016] The high-temperature digestion device provided by the present utility model winds a cooling pipe around a digestion tank inside a first housing, and uses a driver to drive a coolant in a liquid storage tank to circulate in the cooling pipe, taking away the heat in the digestion tank, so as to realize the rapid cooling and temperature reduction of the digestion tank in a closed environment, with a fast speed and a short cycle, thereby meeting the high-frequency measurement of a water quality monitor. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of the high-temperature digestion device provided by the present utility model;

[0019] Figure 2 is a flowchart of the high-temperature digestion rapid cooling and temperature reduction method provided by the present utility model;

[0020] Reference Signs:

[0021] 1, first housing; 2, digestion tank; 3, cooling pipe; 31, inlet; 32, outlet; 4, liquid storage tank; 5, driver; 6, heating component; 7, second housing; 8, second seal; 9, upper high-temperature and high-pressure valve; 10, lower high-temperature and high-pressure valve; 12, heat transfer member. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0023] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0024] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present utility model and for simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0026] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0027] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0028] The following will be combined with Figures 1 to 2 to describe the high-temperature digestion device and the high-temperature digestion rapid cooling method of the present utility model.

[0029] The high-temperature digestion device provided by the present utility model is applicable to a water quality monitor and includes: a first housing 1, a digestion tank 2, and a cooling component. The digestion tank 2 is disposed inside the first housing 1. For example, if a clamping structure is provided inside the first housing 1, the digestion tank 2 is fixedly installed inside the first housing 1 through the clamping structure. In one embodiment, limiting grooves are provided on opposite sides of the inner wall surface of the first housing 1, and convex portions are provided at both ends of the digestion tank 2. The convex portions are embedded in the limiting grooves to achieve fixation. For exampleFigure 1 As shown in the figure, the temperature reduction component includes a cooling pipe 3, a liquid storage tank 4, and a driver 5. The cooling pipe 3 is wound around the digestion tank 2. The liquid storage tank 4 is used to store the coolant, and the coolant can be water. The inlet 31 of the cooling pipe 3 is located at the bottom of the liquid storage tank 4 and is submerged in the coolant. The outlet 32 of the cooling pipe 3 is provided at the top of the liquid storage tank 4, above the coolant, and does not contact the coolant. Both ends of the driver 5 are communicated with the inlet 31 and the outlet 32 of the cooling pipe 3 respectively.

[0030] Specifically, before the high-temperature digestion device is heated, the driver 5 is started, and the coolant in the cooling pipe 3 can be emptied, reducing the heat to be heated, thereby reducing energy consumption. After the constant-temperature digestion is completed, the driver 5 is started to drive the coolant in the liquid storage tank 4 to circulate in the cooling pipe 3. The coolant in the cooling pipe 3 wound around the outer wall of the digestion tank 2 exchanges heat with the digestion tank 2, and can quickly take away the heat in the digestion tank 2, realizing rapid cooling and temperature reduction after high-temperature digestion and shortening the cycle.

[0031] The high-temperature digestion device provided by the embodiment of the present utility model winds the cooling pipe 3 around the digestion tank 2 in the first housing 1, and uses the driver 5 to drive the coolant in the liquid storage tank 4 to circulate in the cooling pipe 3, taking away the heat in the digestion tank 2, realizing rapid cooling and temperature reduction of the digestion tank 2 in a closed environment, with a fast speed and a short cycle, so as to meet the high-frequency measurement of the water quality monitor.

[0032] The coolant in the embodiment of the present utility model includes pure water. Water has a large specific heat capacity, pure water is simple and easy to obtain, and can also be shared with the water used by the water quality monitor. The design is ingenious. At the same time, pure water has few impurities, avoiding corrosion.

[0033] The cooling pipe 3 in the embodiment of the present utility model can be a cooling pipe 3 made of a heat-conducting material, such as a pipe made of polytetrafluoroethylene or a copper pipe. The copper pipe is not easy to corrode, is simple and easy to obtain, has a low cost, and has good heat conduction effect.

[0034] The digestion tank in the embodiment of the present utility model can be a glass tank, which is simple and easy to obtain, has a low cost, and has good heat conduction effect.

[0035] The high-temperature digestion device provided by the embodiment of the present utility model further includes a heat transfer member 12. The heat transfer member 12 is provided on the outer wall surface of the digestion tank 2 and is in close contact with the cooling pipe 3, that is, the heat transfer member 12 is located between the digestion tank 2 and the cooling pipe 3, increasing the contact area between the cooling pipe 3 and the digestion tank 2, improving the heat conduction efficiency, and thus realizing rapid temperature reduction. Among them, the heat transfer member 12 can be heat-conducting silica gel, heat-conducting silicone grease, etc.

[0036] The high-temperature digestion device provided by the embodiment of the present utility model further includes a limiting member, which is arranged on the outer wall surface of the digestion tank 2 and is used to limit the cooling pipe 3 to prevent the cooling pipe 3 from moving randomly on the outer wall surface of the digestion tank 2, so as to ensure the cooling effect of the coolant in the cooling pipe 3 on the digestion tank 2. The limiting member can also be arranged on the outer wall surface of the heat transfer member 12.

[0037] Further, the limiting member includes a plurality of buckles, and the plurality of buckles are arranged at intervals along the height direction of the digestion tank 2. In one embodiment, the plurality of buckles are on a straight line. In another embodiment, the plurality of buckles are spirally distributed on the outer wall surface of the digestion tank 2.

[0038] In one embodiment, the buckle can be fixed to the outer wall surface of the digestion tank 2 by a binding band. In another embodiment, the buckle can be fixed to the outer wall surface of the digestion tank 2 by an adhesive bonding method.

[0039] The cooling pipe 3 is wound around the outer wall surface of the digestion tank 2. After winding, it is installed in the first housing 1. The first housing 1 is provided with through holes, and the inlet 31 and the outlet 32 of the cooling pipe 3 respectively pass through the corresponding through holes to penetrate out of the first housing 1 and communicate with the liquid storage tank 4.

[0040] Further, the high-temperature digestion device provided by the embodiment of the present utility model further includes a first sealing member. A first sealing member is arranged between the outer wall surface of the cooling pipe 3 and the inner wall surface of the through hole to achieve sealing and waterproofing.

[0041] The first sealing member in the present utility model can be a connection joint, that is, the cooling pipe 3 is respectively arranged on the inner and outer sides of the first housing 1 through the connection joint.

[0042] The high-temperature digestion device provided by the embodiment of the present utility model further includes a temperature sensor, which is arranged in the digestion tank 2 and is used to obtain the current temperature in the digestion tank 2. When the current temperature in the digestion tank 2 is greater than the target temperature, the driver 5 is started to drive the coolant in the liquid storage tank 4 to enter the cooling pipe 3 to cool down the digestion tank 2.

[0043] The high-temperature digestion device provided by the embodiment of the present utility model further includes a heating component 6, which is connected to the digestion tank 2 and is used to heat the water quality in the digestion tank 2. The heating component 6 includes a heating wire, a heating sheet, etc.

[0044] As Figure 1 shown, the heating component 6 is a heating wire, and the heating wire can be wound around the outer wall surface of the digestion tank 2, such as spiral winding, to heat the water quality in the digestion tank 2.

[0045] Further, a spacer layer is also arranged between the heating wire and the cooling pipe 3. The spacer layer has the characteristics of non-conductive, high-temperature resistant and heat-conductive. For example, the spacer layer can be a high-temperature resistant tape, so as to cut off the non-conductivity between the heating wire and the cooling pipe 3 and can conduct heat well.

[0046] The high-temperature digestion device provided by the embodiment of the present utility model further includes a control component. The temperature sensor, the heating component, and the driver 5 are respectively connected to the control component. The control component controls the operating parameters of the driver 5 and the heating component 6 based on the temperature information of the temperature sensor.

[0047] Specifically, before high-temperature digestion, the control component controls the driver 5 to drain the coolant in the cooling pipe 3. The coolant in the cooling pipe 3 enters the liquid storage tank 4, reducing the heating energy consumption of the heating component 6, shortening the heating time, and saving energy.

[0048] During the heating and constant-temperature process, the control component controls the heating component 6 to heat and digest the digestion tank 2, and uses the temperature sensor to detect the current temperature in the digestion tank 2; when the current temperature is close to the target temperature, the control component controls the power of the heating component 6 to decrease; when the current temperature is higher than the target temperature, the control component controls the driver 5 to start, driving the coolant to enter the cooling pipe 3 at the required flow rate and flow rate to cool down the digestion tank 2, and finally making the temperature in the digestion tank 2 reach the target temperature and maintaining a constant temperature.

[0049] After completing the constant-temperature digestion, the control component controls the driver 5 to start, driving the coolant to circulate in the cooling pipe 3. The coolant in the cooling pipe 3 on the outer wall of the digestion tank 2 exchanges heat with the liquid in the digestion tank 2, and can quickly take away the heat in the digestion tank 2, thereby realizing the rapid cooling after high-temperature digestion of the water quality in a closed environment.

[0050] The high-temperature digestion device provided by the embodiment of the present utility model further includes an upper high-temperature and high-pressure valve 9 and a lower high-temperature and high-pressure valve 10. The upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 are respectively arranged at both ends of the digestion tank 2, and the upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 are respectively electrically connected to the control component.

[0051] The upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 are respectively hermetically connected to the digestion tank 2, and the control component can control their opening and closing. Specifically, the control component controls the upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 to open, and the test water sample and digestion reagents (such as oxidizing reagents such as concentrated sulfuric acid, potassium dichromate, potassium persulfate, etc.) can be introduced from the lower high-temperature and high-pressure valve 10. The control component controls the upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 to close; the control component controls the heating component 6 to heat the digestion tank. Under sealed conditions, the higher the temperature, the greater the internal pressure, thereby realizing high-temperature and high-pressure digestion and ensuring the digestion efficiency.

[0052] It should be noted that the upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 can be exposed by opening the end caps at both ends of the first housing 1 for introduction. Alternatively, mounting holes can be provided at both ends of the first housing, and the upper high-temperature and high-pressure valve 9 and the lower high-temperature and high-pressure valve 10 are hermetically mounted in the mounting holes and at least partially exposed outside, facilitating the introduction of the water sample to be tested and the reagent.

[0053] The high-temperature digestion device provided by the embodiment of the present invention further includes a second housing 7. The first housing 1 and the driver 5 are both arranged inside the second housing 7, and the digestion tank 2 is sealed again to achieve waterproof sealing.

[0054] Further, the second housing 7 is provided with mounting holes. Both ends of the cooling pipe 3 located inside the second housing 7 are respectively communicated with an external liquid storage tank 4 through the corresponding mounting holes. A second seal 8 is provided between the outer wall surface of the cooling pipe 3 and the inner wall surface of the mounting hole to achieve waterproof sealing. In the embodiment of the present invention, the cooling pipe 3 can be separately arranged on the inner and outer sides of the second housing 7 through a connection joint.

[0055] The high-temperature digestion device provided by the embodiment of the present invention uses easily obtainable water for cooling, can be applied to a closed-type water quality analyzer, and solves the problem that it is inconvenient to dissipate heat in the existing closed-type water quality analyzer.

[0056] As Figure 2 shown, the embodiment of the present invention further provides a high-temperature digestion rapid cooling and temperature reduction method, including step 100 of emptying the coolant in the cooling pipe; step 200 of controlling the heating component to start and heating the liquid in the digestion tank. Specifically, when the difference between the current temperature and the target temperature in the digestion tank is within a preset range and the current temperature is less than the target temperature, the power of the heating component is controlled to decrease; when the current temperature in the digestion tank is greater than the target temperature, the driver is controlled to drive the coolant to circulate in the cooling pipe. Step 300, after completing high-temperature digestion, control the driver to drive the coolant to circulate in the cooling pipe. Step 400, when the current temperature in the digestion tank is within the target temperature range, control the driver to stop.

[0057] Specifically, before high-temperature digestion, control the driver to start and empty the coolant in the cooling pipe. The coolant in the cooling pipe enters the liquid storage tank, reducing the heating energy consumption of the heating component, shortening the heating time, and saving energy.

[0058] During the heating and constant temperature process, control the heating component to start and heat the liquid in the digestion tank. At the same time, use a temperature sensor to detect the current temperature in the digestion tank. When the current temperature in the digestion tank is close to the target temperature, that is, the difference between the current temperature and the target temperature is within a preset range, such as 5°C, control the power of the heating component to decrease and slow down the heating speed to avoid the current temperature being higher than the target temperature. When the current temperature is higher than the target temperature, control the driver to drive the coolant to circulate in the cooling pipe, and the flow rate and flow of the coolant in the cooling pipe can be controlled according to the temperature, so as to cool down the liquid in the digestion tank. When the current temperature detected by the temperature sensor in the digestion tank is within the target temperature range, control the driver to stop, so that the temperature in the digestion tank reaches the target temperature and maintains a constant temperature; start the next cycle.

[0059] After the constant temperature digestion is completed in the embodiment of the present utility model, control the driver to drive the coolant to circulate in the cooling pipe. The coolant in the cooling pipe on the outer wall of the digestion tank exchanges heat with the liquid in the digestion tank, and quickly takes away the heat in the digestion tank, so as to realize the rapid cooling after the high-temperature digestion of the water quality in a closed environment.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A high-temperature digestion device, characterized in that, Comprising: A first housing, a digestion tank, and a cooling component. The digestion tank is disposed within the first housing. The cooling component includes a cooling pipe, a liquid storage tank, and a driver. The liquid storage tank is used for storing a coolant. The cooling pipe is wound around the digestion tank. The inlet of the cooling pipe is located at the bottom of the liquid storage tank and submerged in the coolant. The outlet of the cooling pipe is disposed at the top of the liquid storage tank, above the coolant. Both ends of the driver are respectively communicated with the inlet and the outlet of the cooling pipe.

2. The high-temperature digestion device according to claim 1, characterized in that, Further comprising a heat transfer member, which is disposed on the outer wall surface of the digestion tank and is in contact with the cooling pipe.

3. The high-temperature digestion device according to claim 1, characterized in that, Further comprising a limiting member, which is disposed on the outer wall surface of the digestion tank for restricting the cooling pipe.

4. The high-temperature digestion device according to claim 1, characterized in that, Further comprising a first sealing member, through which the inlet and the outlet of the cooling pipe respectively penetrate the first housing.

5. The high-temperature digestion device according to claim 1, characterized in that, Further comprising a temperature sensor, which is disposed within the digestion tank.

6. The high-temperature digestion device according to claim 5, characterized in that Further comprising a heating component, which is connected to the digestion tank.

7. The high-temperature digestion device according to claim 6, characterized in that, Further comprising a control component. The temperature sensor, the heating component, and the driver are respectively connected to the control component. The control component controls the operating parameters of the driver and the heating component based on the temperature information of the temperature sensor.

8. The high-temperature digestion device according to claim 7, characterized in that, Further comprising an upper high-temperature and high-pressure valve and a lower high-temperature and high-pressure valve, which are respectively disposed at both ends of the digestion tank and are respectively electrically connected to the control component.

9. The high-temperature digestion device according to any one of claims 1 to 8, characterized in that, Further comprising a second housing, within which the first housing and the driver are both disposed.

10. The high-temperature digestion device according to claim 9, characterized in that, Further comprising a second sealing member, through which the inlet and the outlet of the cooling pipe respectively penetrate the second housing.

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