Powder tank feeding device

Abstract

The utility model discloses a powder tank feeding device, belongs to the technical field of coal gasification equipment, and aims to overcome the defect of higher cost of the conventional powder tank feeding device. The powder tank feeding device comprises a vertically-through tank body, an upper cover body is arranged at an upper end opening of the tank body, a lower cover body is arranged at a lower end opening of the tank body, an output opening is formed in the side wall of the tank body, the side wall comprises an inner wall and a heat preservation layer, a heating pipe is arranged on the inner wall and / or in an inner cavity of the tank body, and the heating pipe is connected with the output opening. The lower cover body is provided with a steam channel communicated with the lower port, and a steam fluidization plate is arranged at the position, under the lower port, of the steam channel. The steam can provide a power source for fluidizing the pulverized coal into the gasification furnace and can also participate in reactants for gasifying the pulverized coal, special power source gas does not need to be added, and the cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal gasification equipment and relates to a powder tank feeding device. Background Technology

[0002] In pulverized coal conveying and related processes, the choice of power source has a crucial impact on the cost, efficiency, and reaction effect of the entire production process. Currently, existing technologies commonly use nitrogen or other gases to drive the pulverized coal as a power source. However, this approach has significant drawbacks. On the one hand, the acquisition, storage, and transportation of nitrogen or other inert gases often require substantial investment in equipment and operating costs. The preparation, compression, and transportation of these gases all involve high expenses, undoubtedly increasing the economic burden of the entire production process. On the other hand, these gases only serve as power to drive the pulverized coal; they do not play a chemical role in the subsequent gasification furnace reaction involving the pulverized coal, constituting pure energy consumption and failing to bring any additional value to the entire reaction system. Therefore, the operating cost of existing pulverized coal dispensing devices is relatively high. Summary of the Invention

[0003] This utility model addresses the problems existing in the prior art by proposing a powder dispensing device, aiming to overcome the high cost of existing powder dispensing devices.

[0004] This utility model is implemented as follows:

[0005] A powder dispensing device includes a tank that runs vertically through the tank. The upper end of the tank is provided with an upper cover, and the lower end of the tank is provided with a lower cover. An outlet is provided on the side wall of the tank. The side wall is characterized in that it includes an inner wall and an insulation layer. A heating pipe is provided on the inner wall and / or in the inner cavity of the tank. A steam channel is provided on the lower cover and connects to the lower end. A steam fluidizing plate is provided at the steam channel located directly below the lower end.

[0006] Compared to traditional methods using nitrogen or other inert gases as a power source, this improved solution utilizes steam, which has relatively low costs for steam acquisition and generation. Simultaneously, the heating element avoids a series of problems caused by steam condensation, reducing additional costs associated with condensate treatment and blockage cleaning, thus lowering the overall operating cost of the pulverized coal dispensing device. The synergistic effect of the heating element and steam fluidization gives the pulverized coal excellent flowability and conveying performance, enabling rapid and stable output from the pulverized coal tank, improving pulverized coal conveying efficiency, and consequently enhancing the efficiency of the entire production process. Furthermore, by avoiding equipment failures and production interruptions caused by steam condensation, the continuity and stability of the production process are enhanced, further improving production efficiency. Unlike gases such as nitrogen that do not participate in the reaction in existing technologies, steam participates in the subsequent pulverized coal gasification reaction. Because the heating element avoids steam condensation, it ensures the quantity and quality of steam entering the subsequent reaction, contributing to improved reaction efficiency and product quality, bringing additional value to the entire reaction system.

[0007] Preferably, the steam channel has a steam inlet, a pressure measuring port, and a drain outlet, and the lower cover is provided with a flange for fixing to the tank body. Although the heating tube can prevent steam condensation, a small amount of steam may still condense into water during actual operation. The function of the drain outlet is to allow the condensate to collect at the bottom of the steam channel under the action of gravity and be discharged outside the device through the drain outlet, preventing condensate from accumulating in the steam channel and affecting the normal flow of steam and the fluidization effect of pulverized coal.

[0008] Preferably, the upper end of the steam channel is provided with a fluidizing platform, the steam fluidizing plate is placed on the fluidizing platform, and a pressure block is provided on the fluidizing platform to press the steam fluidizing plate against the fluidizing platform. The pressure block has a fluidizing cavity, and the steam channel is connected to the inner cavity of the tank through the fluidizing cavity. Steam enters the fluidizing cavity from the steam channel, and then enters the inner cavity of the tank evenly through the steam fluidizing plate. Because the steam has a certain pressure and flow rate, when it passes through the small holes or gaps on the steam fluidizing plate, it will form a high-speed airflow, which will keep the coal powder particles in contact with the steam in a suspended and fluidized state, thereby increasing the fluidity of the coal powder and facilitating the smooth discharge of the coal powder from the tank outlet.

[0009] Preferably, the side wall of the tank is provided with an upwardly inclined mounting hole from the inside out. An outlet pipe passes through the mounting hole, with its inner end extending into the fluidization chamber. A sealing and positioning element is installed at the outer end of the mounting hole. The outlet pipe is positioned through the upwardly inclined mounting hole, with one end extending into the fluidization chamber. This upwardly inclined design prevents coal dust particles from entering the outlet pipe due to gravity and causing blockage, ensuring smooth flow of fluidized coal dust. The sealing and positioning element positions the outlet pipe at the outer end of the mounting hole and achieves a seal.

[0010] Preferably, the inner diameter of the lower end of the tank gradually decreases from top to bottom. When the pulverized coal is fluidized by steam in the tank, the gradually decreasing inner diameter at the lower end of the tank causes the pulverized coal to gradually accumulate as the space narrows. Due to the limited space at the lower end, the mixing area of ​​steam and pulverized coal is relatively concentrated, making the steam's fluidization of the pulverized coal more efficient. This accelerates the movement of the pulverized coal towards the tank outlet, creating conditions for smooth discharge.

[0011] Preferably, the heating pipe is a heat tracing pipe filled with heat tracing oil, extending into the upper cover body. The heat tracing pipe contains heat tracing oil, utilizing its high specific heat capacity to store a large amount of heat. Through heat conduction between the pipe wall and the surrounding environment, heat is transferred to the coal powder inside the tank and the upper cover body. Because the heat tracing pipe extends into the upper cover body, the upper cover area can also receive sufficient heat, reducing heat loss at the top and maintaining a balanced overall temperature of the tank. Uniform heat distribution helps prevent condensation at the top of the tank due to excessively low local temperatures, which can cause coal powder to clump. The heat tracing oil circulates within the heat tracing pipe through a heat tracing oil circulation system. When the heat tracing oil absorbs heat in a high-temperature area, it flows to a low-temperature area to release heat, thus continuously providing a stable heat supply to the tank.

[0012] Preferably, the heat tracing pipe inside the tank extends from the top of the tank and connects to a tee. One port of the tee connects to the heat tracing pipe inside the upper cover, and the other port connects to the heat tracing expansion pipe. The heat tracing pipe extending from the top of the tank and connecting to the tee creates a flexible heat circulation path. The heat tracing oil circulates within the heat tracing pipe, and after flowing out from the top of the tank, it is split through the tee. One path flows to the heat tracing pipe connected to the upper cover, providing heat to the upper cover area and preventing coal dust agglomeration or steam condensation due to low temperatures, thus maintaining a stable temperature for the upper cover and surrounding coal dust. The other path connects to the heat tracing expansion pipe, which is mainly used to handle the volume change of the heat tracing oil during thermal expansion.

[0013] Preferably, the upper cover is provided with a pressure-measuring connecting pipe, which passes through the heat tracing pipe of the upper cover and has a gap with the inner wall of the heat tracing pipe. The pressure-measuring connecting pipe is directly connected to the internal space of the tank, and its function is to transmit the pressure inside the tank so that an external pressure measuring device can monitor it in real time. Through the pressure-measuring connecting pipe, the pressure inside the tank can form a corresponding pressure state within the pipe, and the pressure measuring device is connected to the external port of the pressure-measuring connecting pipe to obtain accurate pressure data inside the tank.

[0014] Preferably, the lower end of the pressure measuring connecting pipe extends into the tank body and has a bend, which can collect condensate. When condensate is generated in the pressure measuring connecting pipe, it flows naturally downward under gravity. When it encounters the bend, it cannot continue to flow in a straight line due to the change in path, and thus accumulates in the bend. In this way, the condensate will not flow into the tank body and affect the quality of pulverized coal or the fluidization effect.

[0015] Preferably, the lower cover has a heat tracing channel that communicates with the heat tracing pipe of the tank body, and there is a gap between the portion of the steam channel embedded in the heat tracing channel and the inner wall of the heat tracing channel. The gap between the portion of the steam channel embedded in the heat tracing channel and the inner wall of the heat tracing channel forms a heat exchange space, through which some of the heat from the heat tracing oil is transferred to the steam channel, causing the steam channel to heat up and preventing steam condensation.

[0016] Preferably, the tank has multiple vertically arranged temperature measuring positions inside. These positions allow for temperature monitoring of areas at different heights within the tank. By utilizing these measuring positions, temperature data from multiple points inside the tank can be obtained, providing a comprehensive understanding of the temperature distribution and detailed data support for subsequent analysis and adjustments.

[0017] The present invention has the following advantages: steam can provide a power source for the fluidized coal entering the gasifier, and can also participate in the reactants of coal gasification, without the need to add a special power source gas, thus reducing costs. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of the powder dispensing device.

[0019] Figure 2 This is a partial structural diagram of the upper cover.

[0020] Figure 3 This is a partial structural diagram of the lower cover.

[0021] Figure labeling: 100, Tank body; 110, Insulation layer; 120, Inner wall; 130, Heating pipe; 131, T-junction; 132, First connection port; 133, Second connection port; 140, Mounting hole; 150, Gas outlet pipe; 151, Sealing and positioning component; 160, Temperature measuring position; 200, Upper cover; 210, Pressure measuring connecting pipe; 211, Bend; 300, Lower cover; 310, Steam passage; 311, Steam inlet; 312, Pressure measuring port; 313, Drain outlet; 314, Fluidizing platform; 315, Pressure block; 316, Fluidizing chamber; 320, Steam fluidizing plate; 330, Heat tracing passage. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] This embodiment provides a powder dispensing device, such as... Figure 1 As shown, the tank includes a vertically continuous tank 100. The upper end of the tank 100 has an upper cover 200, and the lower end has a lower cover 300. An outlet is located on the side wall of the tank 100. The side wall includes an inner wall 120 and an insulation layer 110. Heating pipes 130 are installed on the inner wall 120 and within the inner cavity of the tank 100. A steam channel 310 connected to the lower end is provided on the lower cover 300, and a steam fluidizing plate 320 is located at the steam channel 310 directly below the lower end. In other optional embodiments, heating pipes 130 may be installed only on the inner wall 120 or only within the inner cavity.

[0024] Heating pipe 130 transfers heat to the pulverized coal inside tank 100 and the surrounding air, raising the temperature of the pulverized coal and the internal environment of tank 100. Insulation layer 110 reduces heat loss, maintaining a stable internal temperature within tank 100 and providing a relatively stable high-temperature environment for the pulverized coal. A steam channel 310 on the lower cover 300 connects to the lower port of tank 100, and a steam fluidizing plate 320 is positioned directly below the lower port of tank 100. When steam enters tank 100 from steam channel 310, the steam fluidizing plate 320 evenly disperses the steam below the pulverized coal, using the kinetic and thermal energy of the steam to fluidize the pulverized coal particles. On one hand, the kinetic energy of the steam propels the pulverized coal particles, separating them and improving their fluidity; on the other hand, the thermal energy of the steam further increases the temperature of the pulverized coal, enhancing its fluidity and facilitating its smooth output from the outlet.

[0025] The heat generated by the heating element 130 not only acts on the pulverized coal but also raises the overall temperature inside the tank 100, including the ambient temperature of the steam. Since steam condensation requires certain low-temperature conditions, the high-temperature environment maintained by the heating element 130 makes it difficult for the steam to reach the condensation temperature, effectively preventing condensation on the inner wall 120 of the tank 100, the surface of the pulverized coal particles, and the steam fluidization plate 320. This function prevents the liquid water formed by steam condensation from mixing with the pulverized coal, thus preventing problems such as pulverized coal agglomeration and pipe blockage, ensuring smooth pulverized coal transportation and fluidization processes.

[0026] Compared to traditional methods using nitrogen or other inert gases as a power source, this improved solution utilizes steam as the power source, resulting in relatively lower costs for steam acquisition and generation. Simultaneously, the heating element 130 avoids a series of problems caused by steam condensation, reducing additional costs associated with condensate treatment and blockage cleaning, thus lowering the overall operating cost of the powder tank dispensing device. The synergistic effect of the heating element 130 and steam fluidization gives the pulverized coal excellent flowability and conveying performance, enabling rapid and stable output from the powder tank, improving the conveying efficiency of the pulverized coal, and consequently enhancing the efficiency of the entire production process. Furthermore, by avoiding equipment failures and production interruptions caused by steam condensation, the continuity and stability of the production process are enhanced, further improving production efficiency. Unlike gases such as nitrogen that do not participate in the reaction in existing technologies, steam participates in the subsequent pulverized coal gasification reaction. Because the heating element 130 avoids steam condensation, it ensures the quantity and quality of steam entering the subsequent reaction, contributing to improved reaction efficiency and product quality, bringing additional value to the entire reaction system.

[0027] like Figure 1 , 3 As shown, the steam channel 310 has a steam inlet 311, a pressure measuring port 312, and a drain outlet 313. A flange is provided on the lower cover 300 for fixing it to the tank body 100. Although the heating pipe 130 can prevent steam condensation, a small amount of steam may still condense into water during actual operation. The function of the drain outlet 313 is to allow condensate to collect at the bottom of the steam channel 310 under gravity and discharge it outside the device, preventing condensate from accumulating in the steam channel 310 and affecting the normal flow of steam and the fluidization effect of pulverized coal. An insulation layer 110 is also provided inside the lower cover 300.

[0028] like Figure 1 As shown, a fluidizing platform 314 is provided at the upper end of the steam channel 310. The steam fluidizing plate 320 is placed on the fluidizing platform 314. A pressure block 315 is provided on the fluidizing platform 314 to press the steam fluidizing plate 320 onto the fluidizing platform 314. The pressure block 315 has a fluidizing cavity 316. The steam channel 310 is connected to the inner cavity of the tank 100 through the fluidizing cavity 316. Steam enters the fluidizing cavity 316 from the steam channel 310, and then enters the inner cavity of the tank 100 evenly through the steam fluidizing plate 320. Because the steam has a certain pressure and flow rate, when it passes through the small holes or gaps on the steam fluidizing plate 320, it will form a high-speed airflow, which will cause the coal powder particles in contact with the steam to be in a suspended and fluidized state, thereby increasing the fluidity of the coal powder and facilitating the smooth discharge of the coal powder from the outlet of the tank 100.

[0029] like Figure 1As shown, the tank body 100 has an upwardly inclined mounting hole 140 on its side wall. An outlet pipe 150 passes through the mounting hole 140, with its inner end extending into the fluidization chamber 316. A sealing and positioning element 151 is installed at the outer end of the mounting hole 140. The outlet pipe 150 is positioned through the upwardly inclined mounting hole 140, with one end extending into the fluidization chamber 316. This upwardly inclined design prevents coal dust particles from entering the outlet pipe 150 due to gravity and causing blockage, ensuring smooth passage of fluidized coal dust. The sealing and positioning element 151 positions the outlet pipe 150 at the outer end of the mounting hole 140 and achieves a seal. In other optional embodiments, the mounting hole 140 can also be horizontally arranged.

[0030] like Figure 1 As shown, the inner diameter of the lower end of the inner cavity of the tank 100 gradually decreases from top to bottom. When the pulverized coal is fluidized by steam in the tank 100, the gradually decreasing inner diameter of the lower end of the tank 100 causes the pulverized coal to gradually accumulate as the space narrows. Due to the limited space at the lower end, the mixing area of ​​steam and pulverized coal is relatively concentrated, and the fluidization effect of steam on the pulverized coal is more efficient, accelerating the movement of the pulverized coal towards the outlet of the tank 100 and creating conditions for smooth discharge. In other optional embodiments, the lower end of the inner cavity of the tank 100 may also be cylindrical.

[0031] Furthermore, the heating pipe 130 is a heating pipe filled with heating oil, extending into the upper cover 200. The heating pipe contains heating oil, utilizing its high specific heat capacity to store a large amount of heat. Through heat conduction between the pipe wall and the surrounding environment, heat is transferred to the coal dust inside the tank 100 and part of the upper cover 200. Because the heating pipe extends into the upper cover 200, the area of ​​the upper cover 200 can also receive sufficient heat, reducing heat loss at the top and maintaining a balanced overall temperature of the tank 100. Uniform heat distribution helps prevent condensation at the top of the tank 100 due to localized low temperatures, which could cause coal dust to clump. The heating oil circulates within the heating pipe through a heating oil circulation system. When the heating oil absorbs heat in a high-temperature area, it flows to a low-temperature area to release heat, thus continuously providing a stable heat supply to the tank 100. This circulating heating method ensures that the heat tracing pipes maintain a certain temperature, providing a long-lasting and stable heat source for heating pulverized coal.

[0032] like Figure 1As shown, the heat tracing pipe inside the tank 100 extends from the top of the tank 100 and connects to a tee 131. One port of the tee 131 connects to the heat tracing pipe inside the upper cover 200, and the other port connects to the heat tracing expansion pipe. The heat tracing pipe inside the tank 100 extends from the top of the tank 100 and connects to the tee 131, creating a flexible heat circulation path. The heat tracing oil circulates within the heat tracing pipe. After flowing out from the top of the tank 100, it is split through the tee 131. One path flows to the heat tracing pipe inside the upper cover 200, providing heat to the area of ​​the upper cover 200 to prevent coal powder from clumping or steam from condensing due to low temperature, thus maintaining the temperature stability of the upper cover 200 and the surrounding coal powder. The other path connects to the heat tracing expansion pipe, which is mainly used to cope with the volume change of the heat tracing oil during thermal expansion. When the temperature of the heating oil rises and its volume expands, some of the expanded heating oil can be stored in the heating expansion pipe to prevent the pipeline from being damaged due to excessive pressure. At the same time, when the temperature drops and the volume of the heating oil shrinks, it can be replenished back into the circulation system to ensure the stable circulation of the heating oil.

[0033] like Figure 1 As shown, the upper cover 200 is provided with a pressure measuring connecting pipe 210. The pressure measuring connecting pipe 210 passes through the heat tracing pipe of the upper cover 200 and has a gap with the inner wall 120 of the heat tracing pipe. The pressure measuring connecting pipe 210 is directly connected to the internal space of the tank 100, and its function is to transmit the pressure inside the tank 100 so that an external pressure measuring device can monitor it in real time. Through the pressure measuring connecting pipe 210, the pressure inside the tank can form a corresponding pressure state inside the pipe. The pressure measuring device is connected to the external port of the pressure measuring connecting pipe 210 to obtain accurate pressure data inside the tank. The pressure measuring connecting pipe 210 passes through the heat tracing pipe of the upper cover 200 and has a gap with the inner wall 120 of the heat tracing pipe, so that the heat tracing oil can pass through the gap, preventing condensation from forming inside the pressure measuring connecting pipe 210 due to the low temperature environment outside the tank 100.

[0034] like Figure 1 , 2 As shown, the lower end of the pressure measuring connecting pipe 210 extends into the tank 100 and has a bend 211, which collects condensate. When condensate is generated in the pressure measuring connecting pipe 210, it flows downward naturally under gravity. When it encounters the bend 211, the path changes, preventing it from continuing to flow in a straight line, and thus it accumulates in the bend 211. In this way, the condensate will not flow into the tank 100 and affect the quality of the pulverized coal or the fluidization effect.

[0035] like Figure 1 , 3As shown, the lower cover 300 has a heat tracing channel 330 connected to the heat tracing pipe of the tank 100. A gap exists between the portion of the steam channel 310 embedded in the heat tracing channel 330 and the inner wall 120 of the heat tracing channel 330. This effectively increases the temperature of the lower cover 300, preventing coal powder from becoming damp and clumping due to excessively low temperatures, while also preventing steam condensation within the channel, ensuring smooth steam flow and good fluidization of the coal powder. The gap between the portion of the steam channel 310 embedded in the heat tracing channel 330 and the inner wall 120 of the heat tracing channel 330 forms a heat exchange space, where some of the heat from the heat tracing oil is transferred to the steam channel 310, causing the steam channel 310 to heat up and preventing steam condensation.

[0036] The upper cover 200 has a first connection port 132 for the heat tracing pipe, and the lower cover 300 has a second connection port 133 for the heat tracing pipe. The heat tracing oil can enter from the first connection port 132 and flow out from the second connection port 133, or it can enter from the second connection port 133 and flow out from the first connection port 132. The first connection port 132 and the second connection port 133 are connected to the heat tracing oil system.

[0037] like Figure 1 As shown, the tank 100 has multiple vertically arranged temperature measuring positions 160 inside; this embodiment uses four as an example. These multiple vertically arranged temperature measuring positions 160 can monitor the temperature of areas at different heights inside the tank 100. Since the internal temperature distribution of the tank 100 may not be uniform during operation, the degree to which pulverized coal at different heights is affected by steam fluidization and heating varies. Through these temperature measuring positions 160, temperature data from multiple points inside the tank 100 can be obtained, providing a comprehensive understanding of the temperature distribution and detailed data support for subsequent analysis and adjustments. In other optional embodiments, there may be one, two, three, or more than four temperature measuring positions 160.

Claims

1. A powder dispensing device, comprising a tank (100) extending vertically, wherein an upper cover (200) is provided at the upper end of the tank (100), a lower cover (300) is provided at the lower end of the tank (100), and an outlet is provided on the side wall of the tank (100), characterized in that, The sidewall includes an inner wall (120) and an insulation layer (110). A heating pipe (130) is provided on the inner wall (120) and / or in the inner cavity of the tank (100). A steam channel (310) is provided on the lower cover (300) to connect to the lower port. A steam fluidizing plate (320) is provided at the steam channel (310) located directly below the lower port.

2. The powder dispensing device according to claim 1, characterized in that, The steam passage (310) has a steam inlet (311), a pressure measuring port (312) and a drain port (313), and the lower cover (300) is provided with a flange for fixing to the tank (100).

3. The powder dispensing device according to claim 1, characterized in that, The upper end of the steam channel (310) is provided with a fluidizing platform (314), the steam fluidizing plate (320) is placed on the fluidizing platform (314), and a pressure block (315) is provided on the fluidizing platform (314) to press the steam fluidizing plate (320) onto the fluidizing platform (314). The pressure block (315) has a fluidizing cavity (316), and the steam channel (310) is connected to the inner cavity of the tank (100) through the fluidizing cavity (316).

4. A powder dispensing device according to claim 3, characterized in that, The tank body (100) has an installation hole (140) that slopes upward from the inside out on the side wall. An exhaust pipe (150) passes through the installation hole (140). The inner end of the exhaust pipe (150) extends into the fluidization chamber (316). A sealing positioning element (151) is installed at the outer port of the installation hole (140). The outer end of the exhaust pipe (150) is also provided with an exhaust pipe.

5. A powder dispensing device according to claim 1, characterized in that, The inner diameter of the lower end of the inner cavity of the tank (100) gradually decreases from top to bottom.

6. A powder dispensing device according to claim 1, characterized in that, The heating tube (130) is a heat tracing tube filled with heat tracing oil, and the heat tracing tube extends into the upper cover (200).

7. A powder dispensing device according to claim 6, characterized in that, The heat tracing pipe inside the tank (100) extends from the upper end of the tank (100) and connects to a tee (131). One port of the tee (131) is connected to the heat tracing pipe inside the upper cover (200), and the other port of the tee (131) is connected to the heat tracing expansion pipe.

8. A powder dispensing device according to claim 1, characterized in that, The upper cover (200) is provided with a pressure measuring and connecting pipe (210), which passes through the heat tracing pipe of the upper cover (200) and has a gap with the inner wall (120) of the heat tracing pipe; The lower end of the pressure measuring connecting pipe (210) extends into the tank (100) and has a bend (211) that can collect condensate.

9. A powder dispensing device according to claim 6, characterized in that, The lower cover (300) has a heat tracing channel (330) that is connected to the heat tracing pipe of the tank (100), and the portion of the steam channel (310) embedded in the heat tracing channel (330) has a gap with the inner wall (120) of the heat tracing channel (330).

10. A powder dispensing device according to claim 1, characterized in that, The tank (100) has multiple vertically arranged temperature measuring positions (160) inside.

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