Heat exchanger and high-pressure gas circulation rapid cooling system for continuous purification furnace

Abstract

The utility model discloses a heat exchanger and continuous purification furnace use high pressure gas circulation quick cooling system belongs to continuous purification furnace technical field, this heat exchanger includes: inlet pipe, casing, multiple row pipe, multiple guide vane, outlet pipe, multiple row pipe and multiple guide vane are located in the casing, multiple row pipe is located in the casing along horizontal direction, multiple guide vane is located in the casing and is staggered up and down in vertical direction and forms the staggered opening of up and down, and the both ends of row pipe are installed on the mounting hole of the both side walls of casing respectively, and row pipe is used for the inert gas of going into, inlet pipe and outlet pipe are located on the opposite upper and lower two sides of casing respectively. In addition, the utility model further puts forward a kind of continuous purification furnace use high pressure gas circulation quick cooling system, including above-mentioned heat exchanger. The heat exchanger proposed in the utility model realizes the quick and recyclable cooling of graphite powder.

Description

Technical Field

[0001] This utility model relates to the field of continuous purification furnace technology, and in particular to a heat exchanger and a high-pressure gas circulation rapid cooling system for continuous purification furnaces. Background Technology

[0002] Continuous purification furnaces are the core equipment for the production of high-purity graphite powder. Compared with traditional batch furnaces such as Atchison furnaces and vacuum purification furnaces, they have advantages such as high output, low energy consumption, and good product consistency.

[0003] Traditional graphite powder purification furnaces employ a pusher-boat type design. The main body of this type of furnace typically consists of a feeding chamber, a heating section, a cooling section, and a discharging chamber. The powder is placed in a crucible and fed into the furnace from one end. After heating, holding, and cooling, it exits from the other end. The heating process for both the crucible and the powder is a heat storage process, while the cooling process releases heat, which is carried away by cooling water. Due to the low thermal conductivity of graphite powder and its slow cooling rate, the cooling section is very long, resulting in a long pusher boat and a tendency for the boat to arch. Achieving rapid cooling of graphite powder is a technical problem that current technology needs to address. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a high-pressure gas circulation rapid cooling system for heat exchangers and continuous purification furnaces, thereby solving the technical problem of how to achieve rapid cooling of graphite powder in the prior art.

[0005] To achieve the above-mentioned technical objectives, the present invention provides a heat exchanger comprising: an inlet pipe, a shell, multiple tubes, multiple guide plates, and an outlet pipe; the multiple tubes and the multiple guide plates are disposed within the shell, the multiple tubes are disposed horizontally within the shell, and the multiple guide plates are disposed vertically within the shell in an alternating manner to form alternating openings; the two ends of the tubes are respectively mounted on mounting holes on the two side walls of the shell, and the tubes are used to introduce inert gas; the inlet pipe and the outlet pipe are respectively disposed on the upper and lower opposite sides of the shell.

[0006] In any embodiment, the water inlet pipe is located at the bottom right of the housing, and the water outlet pipe is located at the top left of the housing.

[0007] In any embodiment, a flange is also included, which is disposed on the outer side wall of the housing.

[0008] In addition, this utility model also proposes a high-pressure gas circulation rapid cooling system for a continuous purification furnace, including the heat exchanger mentioned above.

[0009] In any embodiment, it further includes a cooling chamber, an air valve, and a circulating fan; the outlet end of the heat exchanger is connected to one end of the cooling chamber, the other end of the cooling chamber is connected to the inlet end of the air valve, the outlet end of the air valve is connected to the circulating fan, and the circulating fan is connected to the inlet end of the heat exchanger.

[0010] In any embodiment, the cooling cavity includes a chamber, an air distribution plate, and a return air plate; the air distribution plate and the return air plate are respectively disposed on opposite side walls of the chamber.

[0011] In any embodiment, an automatic venting valve and a pressure sensor are provided above the cooling chamber; the pressure sensor is used to detect the pressure inside the cooling chamber, and when the relative pressure of the cooling chamber is ≥80kPa, the automatic venting valve is opened to release pressure.

[0012] In any embodiment, a mechanical balance valve is also provided above the cooling chamber. When the relative pressure of the cooling chamber is ≥90kPa, the spring of the mechanical balance valve is opened to release pressure.

[0013] In any embodiment, a bellows is also included, which is disposed between the air valve and the circulating fan, with the air inlet end of the bellows connected to the air outlet end of the air valve and the air outlet end of the bellows connected to the circulating fan.

[0014] In any embodiment, the air valve is a pneumatic butterfly valve.

[0015] Compared with the prior art, the beneficial effects of this utility model include: the heat exchanger proposed in this utility model includes: an inlet pipe, a shell, multiple tubes, multiple guide plates, and an outlet pipe; the multiple tubes and multiple guide plates are disposed inside the shell, the multiple tubes are disposed horizontally inside the shell, and the multiple guide plates are disposed vertically and alternately inside the shell to form staggered openings, the two ends of the tubes are respectively installed on the mounting holes on the two side walls of the shell, and the tubes are used to introduce inert gas; the inlet pipe is located at the bottom right of the shell, and the outlet pipe is located at the top left of the shell. Water enters through the inlet pipe, travels along a wave-like path formed by the crisscrossing guide plates inside the shell, and flows out through the outlet pipe. This rapidly cools the inert gas in the horizontally arranged tubes. The cooled inert gas can then be introduced to rapidly cool the graphite powder, much faster than cooling the graphite powder with water. Furthermore, the inert gas can be circulated and cooled through a heat exchanger, thus achieving rapid and cyclical cooling of the graphite powder.

[0016] The inert gas cooled by the heat exchanger enters the cooling chamber to cool the workpiece (the crucible containing graphite powder), and then returns to the heat exchanger for cooling again through the gas valve and circulating fan to start the next heat exchange cycle, thus achieving rapid and cyclical cooling of graphite powder. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the heat exchanger of Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the high-pressure gas circulation rapid cooling system for the continuous purification furnace according to Embodiment 2 of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Heat exchanger; 11. Inlet pipe; 12. Shell; 13. Tubes; 14. Baffle plate; 15. Outlet pipe; 16. Flange; 2. Cooling chamber; 21. Chamber; 22. Air distribution plate; 23. Return air plate; 3. Air valve; 4. Circulating fan; 5. Bellows; 6. Workpiece; 7. Pipeline. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Example 1

[0022] Combination Figure 1 This embodiment provides a heat exchanger, including: an inlet pipe 11, a shell 12, multiple tubes 13, multiple guide plates 14, and an outlet pipe 15; the multiple tubes 13 and the multiple guide plates 14 are disposed inside the shell 12, the multiple tubes 13 are disposed horizontally inside the shell 12, and the multiple guide plates 14 are disposed vertically and alternately inside the shell 12 to form staggered openings, the two ends of the tubes 13 are respectively installed on the mounting holes (not shown in the figure but easily understood) on the two side walls of the shell 12, and the tubes 13 are used to introduce inert gas; the inlet pipe 11 is disposed at the bottom right of the shell 12, and the outlet pipe 15 is disposed at the top left of the shell 12.

[0023] It is easy to understand that the guide plate 14 is provided with multiple through holes (not shown in the figure but easy to understand), and the tubes 15 pass through the corresponding through holes to achieve installation in the housing 12 and to be cooled by the cooling water introduced into the housing.

[0024] An inert gas, such as nitrogen or argon, exchanges heat with the circulating water through multiple tubes 13 in the heat exchanger. During the heat exchange, the temperature of the nitrogen or argon drops to room temperature, while the cold water is heated to 40–50°C. The cooled inert gas is then circulated back to the cooling chamber 2 to begin the next heat exchange cycle.

[0025] Based on the above embodiments, this embodiment also includes flanges 16, which are disposed on both sides of the top and bottom of the housing 12; there are four flanges 16 in this embodiment, which are respectively disposed on the left and right sides of the top and bottom of the housing 12, and the flanges 16 are used to realize the installation of the heat exchanger.

[0026] In this embodiment, the tube 13 is made of T2 material and has a specification of φ22×1. The guide plates 14 (piece a3) have staggered openings to ensure that the water flows along a curved path.

[0027] Example 2

[0028] Combination Figure 1 and 2 This embodiment proposes a high-pressure gas circulation rapid cooling system for a continuous purification furnace, including heat exchanger 1 of embodiment 1.

[0029] Based on the above embodiments, the high-pressure gas circulation rapid cooling system for the continuous purification furnace in this embodiment further includes a cooling chamber 2, a gas valve 3, and a circulating fan 4. The outlet end of the heat exchanger 1 is connected to one end of the cooling chamber 2, the other end of the cooling chamber is connected to the inlet end of the gas valve 3, the outlet end of the gas valve 3 is connected to the circulating fan 4, and the circulating fan 4 is connected to the inlet end of the heat exchanger 1. The inert gas cooled by the heat exchanger 1 enters the cooling chamber 2 to cool the workpiece 6 (a crucible containing graphite powder), and then returns to the heat exchanger 1 through the gas valve 3 and the circulating fan 4 for further cooling, starting the next heat exchange cycle.

[0030] Based on the above embodiments, the cooling chamber in this embodiment includes a chamber 21, an air distribution plate 22, and a return air plate 23; the air distribution plate 22 and the return air plate 23 are respectively disposed on opposite side walls inside the chamber 21. The air distribution plate 22 blows inert gas to the surface of the workpiece 6 for heat exchange, and the return air plate 23 is used to send the inert gas after heat exchange to the outside of the cooling chamber.

[0031] In this embodiment, the heat exchange medium is either nitrogen or argon, with a circulation flow rate of 5000–20000 Nm³. 3 / h.

[0032] Based on the above embodiments, in this embodiment, an automatic venting valve (not shown in the figure but easily understood) and a pressure sensor (not shown in the figure but easily understood) are provided above the cooling chamber; the pressure sensor is used to detect the pressure inside the chamber 21 of the cooling chamber. When the relative pressure inside the chamber 21 of the cooling chamber 2 is ≥80kPa, the automatic venting valve is opened to release pressure.

[0033] Based on the above embodiments, a mechanical balance valve (not shown in the figure but easy to understand) is also provided above the cooling chamber 2 in this embodiment. When the relative pressure in the chamber 21 of the cooling chamber 2 is ≥90kPa, the spring of the mechanical balance valve is opened to release pressure. In order to improve the heat exchange efficiency, the circulating rapid cooling system adopts a higher pressure, and the pressure is controlled between 60kPa and 80kPa. In order to ensure that the chamber 21 does not exceed the rated pressure, an automatic venting valve and a mechanical balance valve are provided above the chamber 21 to prevent abnormal inflation from causing overpressure in the chamber 21. The chamber 21 is protected against overpressure with dual protection: (1) When the pressure sensor detects that the relative pressure of the replacement chamber is ≥80kPa, the system alarms and opens the automatic venting valve to release pressure, realizing program protection; when the relative pressure of the replacement chamber is ≥90kPa, the spring of the mechanical balance valve is opened to release pressure and release air, realizing mechanical protection; the system alarm and the opening methods of the automatic venting valve and the mechanical balance valve are from the prior art.

[0034] Based on the above embodiments, this embodiment further includes a bellows 5, which is disposed between the air valve 3 and the circulating fan 4. The air inlet of the bellows 5 is connected to the air outlet of the air valve 3, and the air outlet of the bellows 5 is connected to the circulating fan 4. The bellows 5 can buffer the inertial impact of the gas in the pipeline 7.

[0035] Based on the above embodiments, the air valve 3 in this embodiment is a pneumatic butterfly valve.

[0036] The cooling chamber 2, air valve 3, bellows 5, circulating fan 4 and heat exchanger 1 are connected by pipe 7.

[0037] Inert gas at room temperature enters the cooling chamber 2 and is evenly blown onto the workpiece 6 (a crucible containing graphite powder) by the air distribution plate 22. After exchanging heat with the surface of the workpiece 6, the inert gas raises its temperature to 70-80°C. The hot inert gas then passes through the return air plate 23, the pneumatic butterfly valve, the bellows 5, and the circulating fan 4 to reach the heat exchanger 1. Hot nitrogen gas exchanges heat with the circulating water through the tubes 13 in the heat exchanger 1. During the heat exchange, the nitrogen gas temperature drops to room temperature, while the cold water is heated to 40-50°C. The cooled inert gas is then circulated back to the cooling chamber 2 to begin the next heat exchange cycle.

[0038] The high-pressure gas circulation rapid cooling system for continuous purification furnaces uses inert gas as the cooling medium to quickly remove heat from the crucible and powder and exchange it with cooling water. In order to improve heat exchange efficiency, a high-pressure atmosphere is used and multiple overpressure protections are set up. The system has the advantages of high thermal efficiency and good safety.

[0039] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A heat exchanger, characterized in that, include: The system comprises an inlet pipe, a housing, multiple tubes, multiple guide plates, and an outlet pipe. The multiple tubes and guide plates are disposed within the housing. The multiple tubes are arranged horizontally within the housing, and the multiple guide plates are arranged vertically within the housing, forming staggered openings. The two ends of each tube are respectively mounted on mounting holes on the side walls of the housing. The tubes are used to introduce inert gas. The inlet pipe and outlet pipe are respectively located on opposite upper and lower sides of the housing.

2. The heat exchanger according to claim 1, characterized in that, The water inlet pipe is located at the bottom right of the housing, and the water outlet pipe is located at the top left of the housing.

3. The heat exchanger according to claim 1, characterized in that, It also includes a flange, which is disposed on the outer side wall of the housing.

4. A high-pressure gas circulation rapid cooling system for a continuous purification furnace, characterized in that, Includes the heat exchanger as described in any one of claims 1-3.

5. The high-pressure gas circulation rapid cooling system for a continuous purification furnace according to claim 4, characterized in that, It also includes a cooling chamber, an air valve, and a circulating fan; the outlet of the heat exchanger is connected to one end of the cooling chamber, the other end of the cooling chamber is connected to the inlet of the air valve, the outlet of the air valve is connected to the circulating fan, and the circulating fan is connected to the inlet of the heat exchanger.

6. The high-pressure gas circulation rapid cooling system for a continuous purification furnace according to claim 5, characterized in that, The cooling chamber includes a chamber, an air distribution plate, and a return air plate; the air distribution plate and the return air plate are respectively disposed on opposite side walls of the chamber.

7. The high-pressure gas circulation rapid cooling system for a continuous purification furnace according to claim 5, characterized in that, An automatic venting valve and a pressure sensor are provided above the cooling chamber; the pressure sensor is used to detect the pressure inside the cooling chamber, and when the relative pressure of the cooling chamber is ≥80kPa, the automatic venting valve is opened to release the pressure.

8. The high-pressure gas circulation rapid cooling system for a continuous purification furnace according to claim 7, characterized in that, A mechanical balance valve is also provided above the cooling chamber. When the relative pressure of the cooling chamber is ≥90kPa, the spring of the mechanical balance valve is opened to release pressure.

9. The high-pressure gas circulation rapid cooling system for a continuous purification furnace according to claim 5, characterized in that, It also includes a bellows, which is disposed between the air valve and the circulating fan. The air inlet of the bellows is connected to the air outlet of the air valve, and the air outlet of the bellows is connected to the circulating fan.

10. The high-pressure gas circulation rapid cooling system for a continuous purification furnace according to claim 5, characterized in that, The valve is a pneumatic butterfly valve.

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