Multi-section type collecting tank temperature control device, system and method

Abstract

The invention relates to a multi-section collection tank temperature control device, system and method, the multi-section collection tank temperature control device comprises a collection tank and a cylinder, the collection tank is placed in the cylindrical cylinder, an upper temperature sensor tube A, a middle temperature sensor tube B and a lower temperature sensor tube C are welded outside the cylinder, and an upper evaporation coil, a middle evaporation coil and a lower evaporation coil are welded on the outer wall surface of the cylinder. After segmented refrigeration is adopted, the one-time material receiving amount of the freezing collecting tank of the temperature control device can be greatly increased, and the problem that the one-time material receiving amount of the collecting tank is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control devices, and more specifically, to a multi-stage collection tank temperature control device and method. Background Art

[0002] Under the dual support of the global low-carbon economic environment and the country's "dual carbon" policy, energy conservation and efficiency improvement have become the most urgent tasks for every industry. Certain materials in the nuclear industry need to be collected in ultra-low temperature environments, often using cryogenic liquids such as liquid nitrogen to freeze the collection tank or using a collection tank temperature control device to freeze the collection tank. The use of cryogenic liquids such as liquid nitrogen to freeze the collection tank to collect materials requires the use of liquid nitrogen, and the staff is required to regularly check the liquid level and add cryogenic liquids. The labor intensity is high and the level of automation is low. With the increasing requirements for automation and intelligence in factories, collection tank temperature control devices are gradually used to freeze the collection tank for material collection.

[0003] The above-mentioned material condensation collection, the previous process is to use a refrigeration unit or liquid nitrogen to cool the collection tank body, so that the temperature of the collection tank drops to the required working temperature, meet the process requirements of material condensation collection, and the material is condensed in an ultra-low temperature environment. The collection tank temperature control device currently used is to cool the collection tank as a whole. After the temperature is constant, the material collection tank is connected to the material production line. After the material enters the collection tank, the low temperature environment causes the material to condense. However, the efficiency of material condensation in this method is low, and the same tank body collects less material at a time. The amount of material collected is about 50% to 60% of the minimum control requirement line. It is necessary to repeatedly put in the collection of materials, and some even need to remove the collection tank and reinstall it to the point where liquid nitrogen is used for freezing. The collected material is frozen with liquid nitrogen, and the amount of material collected in the collection tank can meet the control requirements. In this way, not only the online working time cycle of the collection tank is long, the energy consumption is relatively large, and the staff needs to connect and disconnect the collection tank and the material production system many times, the operation volume is large, and the work efficiency is low.

[0004] In order to better improve the condensation efficiency of the material, optimize the above process, adjust the cooling method of the collection tank temperature control device according to the material characteristics, improve the material condensation efficiency, increase the one-time collection amount of the same tank material, reduce the operation of the collection tank, and improve the labor efficiency of personnel. Summary of the invention

[0005] The purpose of the present invention is to provide a segmented temperature-controlled ultra-low temperature device in response to the defects and shortcomings in the prior art, based on the material condensation characteristics, to cool the material collection tank in segments, improve the condensation efficiency of the material in the collection tank, increase the final material collection volume in the same tank body, and achieve energy saving and efficiency improvement.

[0006] The technical solution of the present invention is as follows: a multi-stage collecting tank temperature control device, comprising a collecting tank and a barrel, the collecting tank is placed in the cylindrical barrel, an upper temperature sensor tube A, a middle temperature sensor tube B, and a lower temperature sensor tube C are welded on the outside of the barrel, an upper evaporation coil, a middle evaporation coil, and a lower evaporation coil are welded on the outer wall of the barrel, respectively at the upper, middle and lower parts of the barrel, and one end of the upper temperature sensor tube A, the middle temperature sensor tube B, and the lower temperature sensor tube C are welded to the barrel, and the other ends are respectively connected to the upper evaporation coil, the middle evaporation coil, and the lower evaporation coil.

[0007] The temperature sensor tube A, the middle temperature sensor tube B, and the lower temperature sensor tube C are different in length.

[0008] The upper evaporation coil, the middle evaporation coil and the lower evaporation coil are all connected to the cylinder body by soldering; and the copper tubes of the three evaporation coils have the same specifications.

[0009] The upper end of the cylinder is provided with a flange, and the temperature sensor tube A, the middle temperature sensor tube B, and the lower temperature sensor tube C are inserted from the upper end flange of the cylinder and fit with the inner wall of the upper evaporation coil, the middle evaporation coil, and the lower evaporation coil.

[0010] The pipelines before the inlets of the upper evaporating coil, the middle evaporating coil and the lower evaporating coil are respectively provided with a No. 1 capillary tube CT, a No. 2 capillary tube CT and a No. 3 capillary tube CT.

[0011] A multi-stage collecting tank temperature control system comprises the multi-stage collecting tank temperature control device and a regenerator, wherein the regenerator is connected to a No. 1 capillary tube CT, a No. 2 capillary tube CT and a No. 3 capillary tube CT respectively through a coil inlet main line, the No. 1 capillary tube CT, the No. 2 capillary tube CT and the No. 3 capillary tube CT are respectively connected to an upper evaporating coil, a middle evaporating coil and a lower evaporating coil, and the No. 1 capillary tube CT and the No. 2 capillary tube CT are respectively connected to a No. 1 solenoid valve SV and a No. 2 solenoid valve SV, the outlet pipelines of the upper evaporating coil, the middle evaporating coil and the lower evaporating coil pass through a No. 1 condenser, a No. 2 condenser and a No. 3 condenser and then enter into a coil outlet main line, the coil outlet main line is connected to the regenerator to form a cycle.

[0012] A multi-stage collection tank temperature control method comprises the following steps:

[0013] S1: Connect the collection tank to the material production system. Before material collection begins, open the No. 1 solenoid valve SV and the No. 2 solenoid valve SV at the same time, so that the upper evaporation coil, the middle evaporation coil, and the lower evaporation coil are simultaneously fed with refrigerant to cool the cylinder, and the internal temperature of the collection tube is lowered through conduction;

[0014] S2: When the temperature of the cylinder reaches a certain temperature, the No. 1 solenoid valve SV and the No. 2 solenoid valve SV are closed, leaving only the lower evaporator coil to continue cooling the cylinder. Finally, the temperature of the upper evaporator coil, the middle evaporator coil, and the lower evaporator coil are controlled to be constant at the set temperature.

[0015] S3: Material is introduced into the collection tank. When the pressure of the material production system rises to the specified value, the No. 1 solenoid valve SV is opened, and the middle evaporator coil is connected to cool the middle part of the cylinder. When the pressure of the material production system pipeline rises to the specified value again, the upper evaporator coil is connected to cool the upper part of the cylinder. When the material in the collection tank reaches 70% of the maximum collection amount, the collection of materials in the collection tank is ended.

[0016] In S2, when the cylinder temperature reaches -120°C, the No. 1 solenoid valve SV and the No. 2 solenoid valve SV are closed; the temperatures of the upper evaporator coil, the middle evaporator coil and the lower evaporator coil are controlled to -120°C + -5°C.

[0017] In S3, the specified value of the material production system pipeline pressure is 1.2kpa.

[0018] It also includes S4: disconnecting the material collection tank from the material production system, stopping the collection tank from collecting materials, and stopping the collection tank from refrigerating.

[0019] The remarkable effect of the present invention is that after the compressor is started and before the material collection begins, each solenoid valve is opened at the same time, allowing each evaporation coil to pass refrigerant at the same time, starting to cool the cylinder, and lowering the temperature inside the collection tube through conduction. When the temperature of the upper part of the cylinder reaches a certain temperature, the evaporation coil solenoid valve is closed, allowing the lower evaporation coil to continue to cool the cylinder, so that it is constant at the set temperature and waits for material collection. After the material is passed into the collection tank, for a period of time at the beginning, only the lower evaporation coil continues to cool the cylinder, taking away the heat released by the condensation of the material. When the lower refrigeration capacity cannot meet the material condensation, the material production system pipeline pressure begins to rise slowly. When the pressure rises to the specified value, the second section of the evaporator coil is connected to refrigerate the second section of the cylinder. When the material production system pipeline pressure rises to the specified value again, the third section of the evaporator coil is connected to refrigerate the third section of the cylinder, and so on. When the material in the collection tank reaches the specified amount or all evaporator coils are connected and the material production system pipeline pressure rises to the specified value again, the collection tank ends collecting materials, disconnects the material collection tank from the material production system, stops collecting materials, and stops refrigerating the collection tank. After adopting segmented refrigeration, the one-time collection amount of the temperature control device freezing collection tank can be greatly increased, solving the problem of low one-time collection amount of the collection tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation cases of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall assembly of the collection tank and the cylinder;

[0022] Figure 2 This is a brief schematic diagram of the refrigeration system;

[0023] 1 Collection tank; 2 Cylinder; 3 Upper evaporation coil; 4 Middle evaporation coil; 5 Lower evaporation coil; 6 Upper temperature sensor tube A; 7 Middle temperature sensor tube B; 8 Lower temperature sensor tube C;

[0024] 9 Coil inlet main line; 10 No. 1 solenoid valve SV; 11, No. 2 solenoid valve SV; 12 No. 1 capillary tube CT; No. 2 13 capillary tube CT; No. 3 14 capillary tube CT; 15 Coil outlet main line; 16 Regenerator. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0029] A multi-stage collecting tank temperature control device comprises a cylindrical barrel 2 for placing a collecting tank 1, as shown in the attached Figure 1 As shown. The upper temperature sensor tube A6, the middle temperature sensor tube B7, and the lower temperature sensor tube C8 are welded on the outside of the cylinder 2, and the temperature sensor tube A6, the middle temperature sensor tube B7, and the lower temperature sensor tube C8 are of different lengths; the upper evaporation coil 3, the middle evaporation coil 4, and the lower evaporation coil 5 are welded on the outer wall of the cylinder 2, respectively at the upper, middle, and lower parts of the cylinder 2, and the upper temperature sensor tube A6, the middle temperature sensor tube B7, and the lower temperature sensor tube C8 are all welded at one end to the flange surface of the cylinder 2, and the other end is connected to the upper evaporation coil 3, the middle evaporation coil 4, and the lower evaporation coil 5, respectively.

[0030] After the collecting tank 1 is placed into the cylinder 2, it is fixed together with the flange of the material production system.

[0031] Preferably, a flange is provided at the upper end of the cylinder 2;

[0032] Preferably, after the collecting tank 1 is placed in the cylinder 2, there is a very small gap or it fits closely with the inner wall of the cylinder 2;

[0033] Preferably, the temperature sensor can be inserted from the flange of the cylinder and fit with the inner walls of the upper evaporation coil 3, the middle evaporation coil 4, and the lower evaporation coil 5;

[0034] Preferably, the upper evaporation coil 3, the middle evaporation coil 4, and the lower evaporation coil 5 are all connected to the cylinder 2 by soldering; and the copper tubes of the three evaporation coils have the same specifications;

[0035] Preferably, the three evaporator coils have the same size after processing;

[0036] Preferably, a large gap is maintained between the three-way evaporation coils;

[0037] Preferably, the temperature sensor is located in the middle of the coil;

[0038] Preferably, the pipelines before the inlets of the upper evaporation coil 3, the middle evaporation coil 4, and the lower evaporation coil 5 are respectively provided with a No. 1 capillary CT12, a No. 2 capillary CT13, and a No. 3 capillary CT14, and the capillaries are arranged between the evaporation coil and the solenoid valve;

[0039] Preferably, the upper evaporation coil 3, the middle evaporation coil 4, and the lower evaporation coil 5 are in parallel relationship and connected to the coil inlet main pipe 9;

[0040] A multi-stage collecting tank temperature control system comprises the multi-stage collecting tank temperature control device and a regenerator 16. The regenerator 16 is connected to a No. 1 capillary CT12, a No. 2 capillary CT13 and a No. 3 capillary CT14 through a coil inlet main line 9. The No. 1 capillary CT12, the No. 2 capillary CT13 and the No. 3 capillary CT14 are connected to an upper evaporating coil 3, a middle evaporating coil 4 and a lower evaporating coil 5 respectively. The upper evaporating coil 3 and the middle evaporating coil 4 are respectively provided with a No. 1 solenoid valve SV10 and a No. 2 solenoid valve SV11, which can control the on and off of the evaporating coils. The outlet pipelines of the upper evaporating coil 3, the middle evaporating coil 4 and the lower evaporating coil 5 pass through a condenser 17, a condenser 18 and a condenser 19 and then pass into a coil outlet main line 15. The coil outlet main line 15 is connected to the regenerator 16 to form a circulation system.

[0041] A multi-stage collection tank temperature control method comprises the following steps:

[0042] S1: Connect the collection tank 1 to the material production system. After the compressor is started and before the material collection begins, the No. 1 solenoid valve SV10 and the No. 2 solenoid valve SV11 are opened at the same time, so that the refrigerant is introduced into the three-way evaporating coil at the same time, and the cylinder 2 begins to be cooled, and the internal temperature of the collection tube 1 is reduced by conduction.

[0043] S2: When the temperature of the cylinder 2 reaches a certain temperature (-120℃), close the No. 1 solenoid valve SV10 and the No. 2 solenoid valve SV11, leaving only the evaporator coil 5 to continue cooling the cylinder 2. Finally, control the temperature of the evaporator coil to keep it constant at the set temperature (-120℃+-5℃) and wait for the collection of materials.

[0044] S3: When materials are introduced into the collection tank 1, at the beginning, only the lower evaporating coil 5 continues to introduce refrigerant to cool the cylinder 2, taking away the heat released by the condensation of the materials. When the refrigeration capacity cannot meet the needs of material condensation, the pressure in the material production system pipeline begins to rise slowly. When the pressure rises to the specified value, open the No. 1 solenoid valve SV10, connect the middle evaporating coil 4 to cool the middle part of the cylinder 2, and when the pressure in the material production system pipeline rises to the specified value again, connect the upper evaporating coil 3 to cool the upper part of the cylinder 2, until the material in the collection tank 1 reaches the specified amount (0.7M~0.9M, M is the maximum amount of material collected by the collection tank) or the pressure in the material production system pipeline rises to the specified value (1.2kpa) again, the collection of materials in the collection tank ends.

[0045] S4: Disconnect the connection between the material collection tank 1 and the material production system, stop the collection tank 1 from collecting materials, and stop the collection tank 1 from refrigerating.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage collection tank temperature control device, characterized in that: The invention comprises a collecting tank (1) and a cylinder (2), wherein the collecting tank (1) is placed in the cylindrical cylinder (2), an upper temperature sensor tube A (6), a middle temperature sensor tube B (7), and a lower temperature sensor tube C (8) are welded to the outside of the cylinder (2), and an upper evaporation coil (3), a middle evaporation coil (4), and a lower evaporation coil (5) are welded to the outer wall of the cylinder (2), respectively at the upper part, the middle part, and the lower part of the cylinder (2), and one end of each of the upper temperature sensor tube A (6), the middle temperature sensor tube B (7), and the lower temperature sensor tube C (8) is welded to the cylinder (2), and the other end is respectively connected to the upper evaporation coil (3), the middle evaporation coil (4), and the lower evaporation coil (5).

2. A multi-stage collection tank temperature control device according to claim 1, characterized in that: The temperature sensor tube A (6), the middle temperature sensor tube B (7), and the lower temperature sensor tube C (8) are of different lengths.

3. The multi-stage collection tank temperature control device according to claim 1, characterized in that: The upper evaporation coil (3), the middle evaporation coil (4), and the lower evaporation coil (5) are all connected to the cylinder (2) by soldering; and the copper tubes of the three evaporation coils have the same specifications.

4. The multi-stage collection tank temperature control device according to claim 1, characterized in that: A flange is provided at the upper end of the cylinder (2); the temperature sensor tube A (6), the middle temperature sensor tube B (7), and the lower temperature sensor tube C (8) penetrate through the flange at the upper end of the cylinder (2) and fit against the inner walls of the upper evaporation coil (3), the middle evaporation coil (4), and the lower evaporation coil (5).

5. The multi-stage collection tank temperature control device according to claim 1, characterized in that: The pipelines before the inlets of the upper evaporating coil (3), the middle evaporating coil (4) and the lower evaporating coil (5) are respectively provided with a first capillary tube CT (12), a second capillary tube CT (13) and a third capillary tube CT (14).

6. A multi-stage collection tank temperature control system, characterized in that: The multi-stage collecting tank temperature control device comprises a heat regenerator (16), wherein the heat regenerator (16) is respectively connected to a first capillary tube CT (12), a second capillary tube CT (13), and a third capillary tube CT (14) through a coil inlet main line (9), and the first capillary tube CT (12), the second capillary tube CT (13), and the third capillary tube CT (14) are respectively connected to an upper evaporation coil (3), a middle evaporation coil (4), and a lower evaporation coil (5), and The first capillary tube CT (12) and the second capillary tube CT (13) are connected to the first solenoid valve SV (10) and the second solenoid valve SV (11) respectively. The outlet pipelines of the upper evaporation coil (3), the middle evaporation coil (4) and the lower evaporation coil (5) pass through the first condenser (17), the second condenser (18) and the third condenser (19) and then flow into the coil outlet main pipeline (15). The coil outlet main pipeline (15) is connected to the regenerator (16).

7. A multi-stage collection tank temperature control method, using the multi-stage collection tank temperature control system as claimed in claim 6, characterized in that: The following steps are involved: S1: Connect the collection tank (1) to the material production system. Before the material collection starts, the first solenoid valve SV (10) and the second solenoid valve SV (11) are opened simultaneously, so that the upper evaporation coil (3), the middle evaporation coil (4), and the lower evaporation coil (5) are simultaneously supplied with refrigerant to cool the cylinder (2), thereby lowering the internal temperature of the collection tube (1) through conduction; S2: When the temperature of the cylinder (2) reaches a certain temperature, the first solenoid valve SV (10) and the second solenoid valve SV (11) are closed, leaving only the lower evaporation coil (5) to continue cooling the cylinder (2). Finally, the temperatures of the upper evaporation coil (3), the middle evaporation coil (4), and the lower evaporation coil (5) are controlled to be constant at the set temperature. S3: Material is introduced into the collection tank (1). When the pressure of the material production system rises to a specified value, the first solenoid valve SV (10) is opened, and the middle evaporating coil (4) is connected to refrigerate the middle part of the cylinder (2). When the pressure of the material production system pipeline rises to a specified value again, the upper evaporating coil (3) is connected to refrigerate the upper part of the cylinder (2). When the material in the collection tank (1) reaches 70% of the maximum material collection amount, the collection of materials in the collection tank is terminated.

8. A multi-stage collection tank temperature control method according to claim 7, characterized in that: In S2, when the temperature of the cylinder (2) reaches -120°C, the first solenoid valve SV (10) and the second solenoid valve SV (11) are closed; and the temperature of the upper evaporating coil (3), the middle evaporating coil (4) and the lower evaporating coil (5) is controlled to be -120±5°C.

9. A multi-stage collection tank temperature control method according to claim 7, characterized in that: In S3, the specified value of the material production system pipeline pressure is 1.2kpa.

10. A multi-stage collection tank temperature control method according to claim 7, characterized in that: The method further comprises S4: disconnecting the material collection tank (1) from the material production system, stopping the collection tank (1) from collecting materials, and stopping the collection tank (1) from refrigerating.

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