Low-temperature reaction kettle with temperature controlled by liquid nitrogen

Abstract

The low-temperature reaction kettle comprises a reaction kettle body, a temperature control mechanism is arranged on the peripheral side of the reaction kettle body, and the temperature control mechanism comprises a heat insulation shell. In the using process of the improved low-temperature reaction kettle, the heat exchange mechanism pumps out low-temperature nitrogen emitted by a heat exchange solution in the heat conduction shell and compresses and cools the low-temperature nitrogen, then the cooled nitrogen is injected into the heat insulation shell again through the gas injection piece, and finally heat on the reaction kettle body is continuously taken away. The temperature of the reaction kettle body can be adjusted by adjusting the flow rate of air flow, the adjustment range of the temperature of the reaction kettle body can be adjusted according to the amount of liquid nitrogen injected into the heat exchange piece, the device is simple in structure and does not need to be frequently overhauled and calibrated, the workload of a user is reduced, and the temperature of the reaction kettle body is controlled through the flow rate of low-temperature nitrogen. The temperature difference is small, and the temperature fluctuation of the reaction kettle body is small.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to a low-temperature reaction kettle controlled by liquid nitrogen. Background Art

[0002] The cooling principle of the liquid nitrogen reactor mainly relies on the low temperature characteristics of liquid nitrogen. Liquid nitrogen is a liquid form of nitrogen at low temperature, usually -196°C. It has an extremely low temperature. Therefore, when liquid nitrogen comes into contact with the substances in the reactor, it will quickly absorb heat and vaporize, thereby rapidly reducing the temperature in the reactor.

[0003] Existing low-temperature reactors generally use quantitative injection of liquid nitrogen to remove the heat generated by the reactor. Generally, a more accurate dosimeter is required to control the injection amount of liquid nitrogen to ensure that the vaporization expansion of liquid nitrogen does not cause damage to the reactor and the internal temperature of the reactor is stable. The equipment structure is relatively complex and difficult to maintain, and the dosimeter requires a long time to inspect and calibrate, which increases the user's workload. In addition, due to the large temperature difference between liquid nitrogen and the reactor, the liquid nitrogen absorbs heat too quickly, causing large temperature fluctuations inside the reactor. Utility Model Content

[0004] The utility model aims to provide a low-temperature reaction kettle controlled by liquid nitrogen, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-temperature reactor controlled by liquid nitrogen, comprising a reactor body, a temperature control mechanism is provided on the outer peripheral side of the reactor body, the temperature control mechanism comprises an insulating shell, the insulating shell is fixedly sleeved on the outer peripheral side of the reactor body, a heat exchange solution is filled between the reactor body and the inner wall of the insulating shell, a gas injection piece is provided on the outer peripheral wall of the insulating shell, and a heat exchange mechanism is provided on the outer peripheral side of the insulating shell.

[0006] Preferably, the gas injection component includes a plurality of one-way valves, which are equidistantly arranged on the outer peripheral side of the insulation shell from top to bottom, and the exhaust end of each one-way valve passes through the shell wall of the insulation shell and is fixedly connected to the insulation shell, and the one-way valve is arranged in an arc-shaped tubular shape.

[0007] Preferably, a shunt pipe is fixedly installed on the outer peripheral wall of the insulation shell at a position corresponding to the one-way valve, and the air inlet end of the one-way valve penetrates the pipe wall on one side of the shunt pipe and is fixedly connected to the shunt pipe, a soft pipe is provided on the other side of the shunt pipe, and one end of the soft pipe penetrates the pipe wall of the shunt pipe and is fixedly connected to the shunt pipe, an L-shaped conduit is provided on the outer peripheral side of the top of the insulation shell, and one end of the conduit penetrates the shell wall of the top of the insulation shell and is fixedly connected to the insulation shell, and the conduit and the one-way valve are relatively arranged on two sides of the outer shell.

[0008] Preferably, the heat exchange mechanism comprises a heat-conducting tube and a buffer tube, the buffer tube is fixedly sleeved on the other end of the catheter, and the inner cavity diameter of the buffer tube is larger than the diameter of the catheter.

[0009] Preferably, a high-pressure pump is fixedly installed on the top of the heat-conducting tube, the exhaust end of the high-pressure pump penetrates the tube wall of the heat-conducting tube and is fixedly connected to the heat-conducting tube, the air inlet end of the high-pressure pump is connected to a connecting pipe, and the end of the connecting pipe away from the high-pressure pump penetrates the tube wall of the buffer tube and is fixedly connected to the buffer tube.

[0010] Preferably, a piston plate is provided in the heat-conducting cylinder, and the outer peripheral wall of the piston plate is in contact with the inner wall of the heat-conducting cylinder, and high-pressure air is filled between the bottom side of the piston plate and the inner bottom wall of the heat-conducting cylinder.

[0011] Preferably, an electrically controlled pressure-limiting valve is fixedly provided at the center of the piston plate, and the other end of the soft tube is fixedly provided through the wall of the heat-conducting tube and is connected to the exhaust end of the electrically controlled pressure-limiting valve.

[0012] The utility model has the following beneficial effects:

[0013] During use of the improved low-temperature reactor, the heat exchange mechanism extracts the low-temperature nitrogen gas emerging from the heat exchange solution in the heat-conducting shell, compresses and cools the low-temperature nitrogen gas, and then re-injects the cooled nitrogen gas into the heat-insulating shell through the gas injection piece, and finally continuously takes away the heat from the reactor body. The temperature of the reactor body can be adjusted by adjusting the air flow rate, and the adjustment range of the temperature of the reactor body can be adjusted by the amount of liquid nitrogen injected into the heat exchange piece. The device has a simple structure and does not require frequent maintenance and calibration, which reduces the workload of users. The temperature of the reactor body is controlled by the low-temperature nitrogen flow rate, and the temperature fluctuation of the reactor body is small due to the small temperature difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the heat-insulating shell of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the heat insulation shell and the buffer tube of the utility model;

[0018] Figure 4It is a schematic diagram of the internal structure of the heat-conducting tube of the utility model.

[0019] In the figure: 1. Reactor body; 2. Temperature control mechanism; 21. Insulation shell; 22. Gas injection part; 221. One-way valve; 222. Diverter pipe; 223. Soft pipe; 23. Conduit; 3. Heat exchange mechanism; 31. Heat transfer tube; 32. Buffer pipe; 33. High-pressure pump; 34. Connecting pipe; 35. Piston plate; 36. Electric pressure-limiting valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The utility model provides a technical solution: Figure 1-4 The utility model discloses a low-temperature reactor controlled by liquid nitrogen, comprising a reactor body 1, a temperature control mechanism 2 is arranged on the outer peripheral side of the reactor body 1, the temperature control mechanism 2 comprises a heat insulation shell 21, the heat insulation shell 21 is fixedly sleeved on the outer peripheral side of the reactor body 1, a heat exchange solution is filled between the reactor body 1 and the inner wall of the heat insulation shell 21, a gas injection piece 22 is arranged on the outer peripheral wall of the heat insulation shell 21, and a heat exchange mechanism 3 is arranged on the outer peripheral side of the heat insulation shell 21.

[0022] In this embodiment, during use of the improved low-temperature reactor, the heat exchange mechanism 3 continuously extracts the low-temperature nitrogen gas emitted from the heat exchange solution in the heat-conducting shell, and compresses and cools the low-temperature nitrogen gas, and then re-injects the cooled nitrogen gas into the insulation shell 21 through the gas injection piece 22. The cooled nitrogen gas exchanges heat with the heat exchange solution in the insulation shell 21, and drives the heat exchange solution in the insulation shell 21 to continuously rotate and mix, continuously taking away the heat on the reactor body 1, and making the low temperature of each part of the heat exchange solution in the insulation shell 21 basically maintained at the required intensity. The heat dissipation rate of the reactor body 1 can be adjusted by adjusting the air flow rate, and the adjustment range of the temperature of the reactor body 1 can be adjusted by the amount of liquid nitrogen injected into the heat exchange piece. The device has a simple structure, does not have a relatively tight instrument, and does not require the operator to perform frequent maintenance and calibration. The temperature of the reactor body 1 is controlled by the low-temperature nitrogen flow rate. Due to the small temperature difference, the temperature fluctuation of the reactor body 1 is small.

[0023] In a further preferred embodiment of the present invention, Figure 1-3 As shown, the gas injection member 22 includes a plurality of one-way valves 221, which are arranged equidistantly from top to bottom on the outer peripheral side of the heat-insulating shell 21, and the exhaust end of each one-way valve 221 penetrates the shell wall of the heat-insulating shell 21 and is fixedly connected to the heat-insulating shell 21, and the one-way valve 221 is arranged in an arc-shaped tubular shape;

[0024] In this embodiment, a plurality of one-way valves 221 arranged in an arc-shaped tubular shape inject nitrogen into the insulating shell 21 along an arc-shaped trajectory from multiple positions, thereby pushing the heat exchange solution in the insulating shell 21 along the arc-shaped trajectory, so that part of the heat exchange solution between the insulating shell 21 and the reactor body 1 flows and quickly blends with another part of the heat exchange solution, thereby avoiding excessive temperature differences between the heat exchange solutions.

[0025] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, a shunt pipe 222 is fixedly installed at a position corresponding to the one-way valve 221 on the outer peripheral wall of the insulation shell 21, and the air inlet end of the one-way valve 221 penetrates the pipe wall on one side of the shunt pipe 222 and is fixedly connected to the shunt pipe 222, a soft pipe 223 is provided on the other side of the shunt pipe 222, and one end of the soft pipe 223 penetrates the pipe wall of the shunt pipe 222 and is fixedly connected to the shunt pipe 222, an L-shaped conduit 23 is provided on the outer peripheral side of the top of the insulation shell 21, and one end of the conduit 23 penetrates the shell wall of the top of the insulation shell 21 and is fixedly connected to the insulation shell 21, and the conduit 23 and the one-way valve 221 are relatively arranged on two sides of the shell;

[0026] In this embodiment, after the nitrogen injected into the shunt pipe 222 fills the shunt pipe 222, it is injected into the heat exchange solution in the shunt shell through a plurality of one-way valves 221, and then emerges from the heat exchange solution and flows into the insulation shell 21 through the conduit 23, thereby preventing the insulation shell 21 from being damaged due to excessive pressure in the insulation shell 21.

[0027] In a further preferred embodiment of the present invention, Figure 1 and Figure 3 As shown, the heat exchange mechanism 3 includes a heat-conducting tube 31 and a buffer tube 32. The buffer tube 32 is fixedly sleeved on the other end of the catheter 23. The inner diameter of the buffer tube 32 is larger than the diameter of the catheter 23.

[0028] In this embodiment, during the flow of gas in the above-mentioned conduit 23, if part of the heat exchange solution in the insulation shell 21 is pushed into the conduit 23, after flowing into the buffer tube 32, it will automatically separate from the airflow due to the expansion of the tube diameter and the gravity of the heat exchange solution itself, and then be divided into a liquid flow and flow back into the insulation shell 21 along the inner wall of the buffer tube 32 and the inner wall of the conduit 23.

[0029] In a further preferred embodiment of the present invention, Figure 1 and Figure 4 As shown, a high-pressure pump 33 is fixedly installed at the top of the heat-conducting tube 31, an exhaust end of the high-pressure pump 33 penetrates the tube wall of the heat-conducting tube 31 and is fixedly connected to the heat-conducting tube 31, and a connecting pipe 34 is installed at the air inlet end of the high-pressure pump 33, and an end of the connecting pipe 34 away from the high-pressure pump 33 penetrates the tube wall of the buffer tube 32 and is fixedly connected to the buffer tube 32;

[0030] In this embodiment, the nitrogen gas flowing into the conduit 23 passes through the buffer tube 32 and the connecting tube 34, is sucked by the high-pressure pump 33 and injected into the heat-conducting cylinder 31, and the nitrogen gas compression operation is completed;

[0031] It should be noted that a valve interface is fixedly installed on the top side of the above-mentioned heat-conducting tube 31, and the valve interface is connected to the exhaust end of the external liquid nitrogen supply device. When the above-mentioned device is in use, it is necessary to inject an appropriate amount of liquid nitrogen into the heat-conducting tube 31 through the valve interface.

[0032] In a further preferred embodiment of the present invention, Figure 4 As shown, a piston plate 35 is provided in the heat-conducting cylinder 31, and the outer peripheral wall of the piston plate 35 is in contact with the inner wall of the heat-conducting cylinder 31, and high-pressure air is filled between the bottom side of the piston plate 35 and the inner bottom wall of the heat-conducting cylinder 31;

[0033] In this embodiment, after the nitrogen is injected into the heat-conducting tube 31 , the piston plate 35 cooperates with the heat-conducting tube 31 to automatically complete the nitrogen compression operation due to the push of the gas in the heat-conducting tube 31 on the piston plate 35 , and the operator does not need to perform other operations.

[0034] In a further preferred embodiment of the present invention, Figure 4 As shown, an electrically controlled pressure limiting valve 36 is fixedly installed at the center of the piston plate 35, and the other end of the soft tube 223 is fixedly installed through the wall of the heat-conducting tube 31 and connected to the exhaust end of the electrically controlled pressure limiting valve 36;

[0035] In this embodiment, as the nitrogen is injected into the heat-conducting cylinder 31, the air pressure above the piston plate 35 increases, so that a sufficient pressure difference is generated at both ends of the electric control valve, and the excess compressed nitrogen above the piston plate 35 passes through the one-way valve 221 and is injected into the shunt pipe 222;

[0036] By adjusting the threshold of the electronically controlled pressure-limiting valve 36, more nitrogen can be stored above the piston plate 35. At the same time, the nitrogen pushes the piston plate 35 downward to leave space for the storage of nitrogen. The downward movement of the piston plate 35 will also compress the air below the piston plate 35, ultimately subjecting the nitrogen to greater pressure.

[0037] Working principle: During the use of this improved low-temperature reactor, the heat emitted by the raw material reaction in the reactor body 1 is continuously exchanged between the outer shell of the reactor body 1 and the heat exchange solution in the heat-conducting shell, so that the temperature inside the reactor body 1 is always maintained at a low level;

[0038] It should be noted that before using the low-temperature reactor, the discharge pipe of the external liquid nitrogen supply device needs to be connected to the interface at the top of the heat-conducting tube 31, so as to heat a proper amount of liquid nitrogen at the top of the heat-conducting tube 31;

[0039] When installing the device, the heat-conducting tube 31 needs to be fixedly installed in the flowing water tank;

[0040] During the above heat exchange operation, the air pump is started to continuously extract the low-temperature nitrogen gas emitted from the heat exchange solution in the heat-conducting shell through the connecting pipe 34, the buffer tank and the conduit 23, and inject the low-temperature nitrogen gas into the heat-conducting cylinder 31. Due to the push of the piston plate 35 by the gas inside the heat-conducting cylinder 31, the low-temperature nitrogen gas injected into the heat-conducting cylinder 31 is subjected to great pressure, so that the low-temperature nitrogen gas is compressed. The compressed nitrogen gas exchanges heat with the water flow in the water tank through the heat-conducting cylinder 31, so that the heat emitted by the nitrogen gas after compression is taken away by the flowing water flow, and the water flow absorbs heat to form warm water for use by factory personnel or cleaning equipment in the factory;

[0041] When the high-pressure pump 33 injects nitrogen into the heat-conducting cylinder 31, it will simultaneously push the piston plate 35 downward to move downward and compress the gas in the heat-conducting cylinder 31, so that the pressure on the upper and lower sides of the piston plate 35 is equal, and at the same time, the pressure difference at both ends of the electric-controlled pressure-limiting valve 36 is gradually increased. After the pressure difference at both ends of the electric-controlled pressure-limiting valve 36 reaches the threshold, the nitrogen with lower pressure and temperature at the top side of the piston plate 35 passes through the electric-controlled pressure-limiting valve 36 and the soft tube 223 and flows into the shunt pipe 222, and is quickly injected into the heat-insulating shell 21 through the shunt pipe 222 and the one-way valve 221. The nitrogen with lower temperature injected into the heat-exchange solution in the heat-insulating shell 21 performs heat exchange operation with the heat-exchange solution, so that the heat-exchange solution in the heat-insulating shell 21 is always maintained at a low temperature. The speed of the high-pressure pump 33 is adjusted according to the above, thereby adjusting the heat dissipation rate of the heat-exchange solution.

[0042] It should be noted that the gas injected into the insulation shell 21 through the one-way valve 221 can push the heat exchange solution in the insulation shell 21 along the inner wall of the insulation shell 21, so that part of the heat exchange solution in the insulation shell 21 rotates around the reactor body 1, so that the heat exchange solution in the insulation shell 21 is quickly mixed and blended, and finally the temperature of the heat exchange solution in each part of the insulation shell 21 is relatively uniform;

[0043] It should be noted that, according to the above adjustment of the amount of liquid nitrogen injected into the heat-conducting tube 31 and the threshold of the electric control valve, the pressure of the nitrogen in the heat-conducting tube 31 can be adjusted, thereby adjusting the low-temperature strength of the nitrogen in the heat-conducting tube 31. Finally, the device has a wider range of adjusting the temperature of the reactor body 1 through liquid nitrogen, and the fluctuation size of the temperature of the reactor body 1 during adjustment can be controlled by the low-temperature strength of the nitrogen in the heat-conducting tube 31.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A low-temperature reactor controlled by liquid nitrogen, comprising a reactor body (1), characterized in that: A temperature control mechanism (2) is provided on the outer peripheral side of the reactor body (1), and the temperature control mechanism (2) comprises a heat-insulating shell (21), and the heat-insulating shell (21) is fixedly sleeved on the outer peripheral side of the reactor body (1), and a heat exchange solution is filled between the reactor body (1) and the inner wall of the heat-insulating shell (21), and a gas injection part (22) is provided on the outer peripheral wall of the heat-insulating shell (21), and a heat exchange mechanism (3) is provided on the outer peripheral side of the heat-insulating shell (21).

2. A low temperature reactor controlled by liquid nitrogen according to claim 1, characterized in that: The gas injection component (22) comprises a plurality of one-way valves (221), the plurality of one-way valves (221) being arranged equidistantly from top to bottom on the outer peripheral side of the heat-insulating shell (21), and the exhaust end of each one-way valve (221) penetrates the shell wall of the heat-insulating shell (21) and is fixedly connected to the heat-insulating shell (21), and the one-way valve (221) is arranged in an arc-shaped tubular shape.

3. A low temperature reactor controlled by liquid nitrogen according to claim 2, characterized in that: A shunt pipe (222) is fixedly mounted on the outer peripheral wall of the heat-insulating shell (21) at a position corresponding to the one-way valve (221), and the air inlet end of the one-way valve (221) penetrates the pipe wall on one side of the shunt pipe (222) and is fixedly connected to the shunt pipe (222), a soft pipe (223) is provided on the other side of the shunt pipe (222), and one end of the soft pipe (223) penetrates the pipe wall of the shunt pipe (222) and is fixedly connected to the shunt pipe (222), a conduit (23) in an L-shape is provided on the outer peripheral side of the top of the heat-insulating shell (21), and one end of the conduit (23) penetrates the shell wall on the top of the heat-insulating shell (21) and is fixedly connected to the heat-insulating shell (21), and the conduit (23) and the one-way valve (221) are arranged on two sides of the outer shell relative to each other.

4. A low temperature reactor controlled by liquid nitrogen according to claim 3, characterized in that: The heat exchange mechanism (3) comprises a heat-conducting tube (31) and a buffer tube (32); the buffer tube (32) is fixedly sleeved on the other end of the catheter (23); and the inner diameter of the buffer tube (32) is greater than the diameter of the catheter (23).

5. A low temperature reactor controlled by liquid nitrogen according to claim 4, characterized in that: A high-pressure pump (33) is fixedly mounted on the top end of the heat-conducting tube (31); an exhaust end of the high-pressure pump (33) penetrates the tube wall of the heat-conducting tube (31) and is fixedly connected to the heat-conducting tube (31); an air inlet end of the high-pressure pump (33) is connected to a connecting pipe (34); and an end of the connecting pipe (34) away from the high-pressure pump (33) penetrates the tube wall of the buffer tube (32) and is fixedly connected to the buffer tube (32).

6. A low temperature reactor controlled by liquid nitrogen according to claim 5, characterized in that: A piston plate (35) is provided in the heat-conducting cylinder (31), and the outer peripheral wall of the piston plate (35) is in contact with the inner wall of the heat-conducting cylinder (31), and high-pressure air is filled between the bottom side of the piston plate (35) and the inner bottom wall of the heat-conducting cylinder (31).

7. A low temperature reactor controlled by liquid nitrogen according to claim 6, characterized in that: An electrically controlled pressure limiting valve (36) is fixedly provided at the center of the piston plate (35) and penetrates therethrough. The other end of the soft tube (223) is fixedly provided to penetrate the wall of the heat-conducting tube (31) and is connected to the exhaust end of the electrically controlled pressure limiting valve (36).

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