Semi-volatile substance trapping device

Abstract

The invention relates to the technical field of radioactive waste treatment, and provides a semi-volatile substance trapping device. The semi-volatile substance trapping device comprises: a heater having a first heating section and a second heating section; the heating pipe penetrates through the heater, the heating pipe is provided with a volatilization area and a trapping area, the volatilization area is arranged corresponding to the first heating section, and the trapping area is arranged corresponding to the second heating section; the first heating section is used for heating a solid-state semi-volatile substance in the volatilization area, so that the solid-state semi-volatile substance is converted into a gaseous-state semi-volatile substance; the trapping material support is located in the trapping area, the trapping material support is used for containing trapping materials, and the gaseous semi-volatile substances can flow to the trapping area from the volatilization area and are trapped by the trapping materials. According to the semi-volatile substance trapping device, the trapping effect of the semi-volatile substances is improved, and deep exploration and research of volatilization and trapping characteristics of various semi-volatile substances in nuclear waste are promoted.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive waste treatment, and in particular to a semi-volatile substance capture device. Background Art

[0002] As a "stable power source", nuclear power has become an important part of the carbon-neutral power system. Limited uranium resources, low nuclear fuel utilization, and lack of effective means for the safe disposal of spent fuel are bottlenecks that restrict the sustainable development of nuclear energy scale required under the carbon neutrality goal. Therefore, it is urgent to develop a new generation of advanced nuclear fission energy technology to support the safe and sustainable development of nuclear energy.

[0003] The Accelerator Driven Advanced Nuclear Energy System (ADANES) is an advanced nuclear fuel closed cycle solution that integrates spent fuel transmutation, nuclear fuel proliferation and nuclear power generation. The introduction of advanced high-energy accelerators in ADANES not only enables nuclear reactors to operate under subcritical conditions, improving the safety of nuclear energy utilization, but also greatly improves the utilization rate of uranium resources, while shortening the radioactive life of nuclear waste from hundreds of thousands of years to about a few hundred years.

[0004] ADANES mainly uses the relatively "simple" treatment process of "high temperature dry method + anhydrous physical method" to remove some fission fragments from the spent fuel of the pressurized water reactor and then prepare it into recycled fuel. During this high temperature dry post-processing process, some fission products (including neutron poisons), such as volatile and semi-volatile nuclides, will be continuously released from the spent fuel in the form of gaseous elements and compounds as the treatment process proceeds. Because most of these nuclides are radioactive and have a long half-life, they must be properly handled to avoid leakage into the environment and causing radioactive contamination.

[0005] Among them, the main volatile nuclides are H, Xe, and Kr, and a relatively mature process has been formed for the capture of these volatile substances. The main semi-volatile nuclides are I, Cs, Ru, Te, Mo, Tc, etc., and these semi-volatile substances cannot be effectively captured. Therefore, there is an urgent need for a semi-volatile substance capture device suitable for high-temperature dry process to explore the volatile machine capture characteristics of various semi-volatile substances and provide technical reserves for the high-temperature dry reprocessing of ADANES spent fuel. Summary of the invention

[0006] The present invention provides a semi-volatile substance capture device, which is used to solve the problem in the prior art that semi-volatile substances generated in the high-temperature dry post-processing process of an accelerator-driven advanced nuclear energy system cannot be effectively captured.

[0007] The present invention provides a semi-volatile substance capturing device, comprising: A heater having a first heating section and a second heating section; A heating tube runs through the heater, and the heating tube is provided with a volatilization zone and a capture zone, wherein the volatilization zone is arranged corresponding to the first heating section, and the capture zone is arranged corresponding to the second heating section; the first heating section is used to heat the solid semi-volatile substance in the volatilization zone to convert the solid semi-volatile substance into a gaseous semi-volatile substance; The capture material support is located in the capture area and is used to accommodate the capture material. The gaseous semi-volatile substance can flow from the volatilization area to the capture area and be captured by the capture material.

[0008] According to a semi-volatile substance capture device provided by the present invention, the capture material bracket includes: a support body and an end cover, the support body is formed with a baffle portion, the end cover and the baffle portion are both provided with a plurality of air holes, the end cover is covered at the end of the support body, and a containing space is formed between the end cover and the baffle portion, and the containing space is used to accommodate the capture material.

[0009] According to a semi-volatile substance capture device provided by the present invention, the number of the support bodies is multiple, and the support body has a large diameter section and a small diameter section connected to each other, and the multiple support bodies are connected in sequence by the large diameter section being sleeved on the small diameter section; The end cover includes a large end cover and a small end cover, and the large end cover and the small end cover are both provided with a plurality of air holes. The large end cover is arranged on the end of the large diameter section at one end of the capture material support, and the small end cover is arranged on the end of the small diameter section at the other end of the capture material support.

[0010] According to a semi-volatile substance capture device provided by the present invention, the large end cover has a cover body and a connecting portion coaxially connected, the large diameter section is sleeved on the outside of the connecting portion, and the small end cover is sleeved on the outside of the small diameter section, and the outer diameter of the cover body, the outer diameter of the large diameter section and the outer diameter of the small end cover are the same.

[0011] According to a semi-volatile substance capture device provided by the present invention, a plurality of capture material supports are provided in the capture area of ​​the heating tube, and the plurality of capture material supports are arranged along the length direction of the heating tube.

[0012] A semi-volatile substance capture device provided by the present invention further includes: Sealing structure: sealing structures are respectively installed at both ends of the heating tube, and the sealing structures are sealed and connected to the heating tube, wherein one of the sealing structures is provided with an air inlet, and the other sealing structure is provided with a first air outlet.

[0013] A semi-volatile substance capture device provided by the present invention further includes: A cooler is provided between the heater and one end of the heating tube, and another cooler is provided between the heater and the other end of the heating tube, and the cooler is used to cool the heating tube.

[0014] According to a semi-volatile substance capture device provided by the present invention, the cooler comprises: a shell, the shell is provided with a cooling liquid inlet and a cooling liquid outlet, the heating pipe is passed through the shell, the heating pipe and the shell are surrounded to form a cooling cavity, and the cooling cavity is connected to the cooling liquid inlet and the cooling liquid outlet.

[0015] According to a semi-volatile substance capture device provided by the present invention, the cooler also includes: a liquid resistance structure, which is sleeved on the heating tube and divides the cooling cavity into a first cooling cavity and a second cooling cavity; the liquid resistance structure is provided with a plurality of through holes, the through holes connect the first cooling cavity and the second cooling cavity, the cooling liquid inlet is connected to the first cooling cavity, and the cooling liquid outlet is connected to the second cooling cavity.

[0016] According to a semi-volatile substance capture device provided by the present invention, the liquid resistance structure is provided with a first through hole and a second through hole, a plurality of the first through holes are distributed around the heating tube, a plurality of the second through holes are distributed around the heating tube and are located between the heating tube and the plurality of the first through holes, and the aperture of the second through hole is smaller than the aperture of the first through hole.

[0017] The semi-volatile substance capture device provided by the present invention is provided with a heating tube in the heater, the volatilization zone of the heating tube is heated by the first heating section of the heater, the capture zone of the heating tube is heated by the second heating section, and a capture material support is provided in the capture zone, so that the solid semi-volatile substance in the volatilization zone is heated and converted into a gaseous semi-volatile substance, and the gaseous semi-volatile substance flows to the capture zone and is captured by the capture material in the capture material support. The semi-volatile substance capture device of the present invention can set the temperature of the first heating section and the second heating section separately according to the properties of the gaseous semi-volatile substance to be captured, so that the solid semi-volatile substance is fully volatilized into a gaseous state at a preferred temperature, and the gaseous semi-volatile substance is captured by the capture material at a preferred temperature, thereby improving the capture effect of the semi-volatile substance, and is conducive to promoting the in-depth exploration and research of the volatilization and capture characteristics of various semi-volatile substances in nuclear waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the semi-volatile substance capturing device provided by the present invention.

[0020] Figure 2 It is a schematic diagram of the heating tube structure in the semi-volatile substance capturing device provided by the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the support part in the semi-volatile substance capture device provided by the present invention.

[0022] Figure 4 yes Figure 3 Cross-sectional view of the middle support at AA.

[0023] Figure 5 It is a schematic diagram of the large end cover structure in the semi-volatile substance capture device provided by the present invention.

[0024] Figure 6 It is a schematic diagram of the small end cover structure in the semi-volatile substance capture device provided by the present invention.

[0025] Figure 7 It is a schematic diagram of the liquid resistance structure in the semi-volatile substance capture device provided by the present invention.

[0026] Reference numerals: 1. Heater; 11. First heating section; 12. Second heating section; 2. Heating tube; 3. Collection material support; 31. Support body; 311. Blocking part; 3111. First air hole; 312. Large diameter section; 3121. First internal thread; 313. Small diameter section; 3131. Second external thread; 32. Large end cover; 321. Cover body; 322. Connecting part; 3221. First external thread; 323. Second air hole; 33. Small end cover; 331. Third air hole; 332. Second internal thread; 4. Solid semi-volatile substance; 5. Sealing structure; 61. Air inlet; 62. First air outlet; 63. Second air outlet; 7. Cooler; 71. Shell; 711. Coolant inlet; 712. Coolant outlet; 72. Liquid resistance structure; 721. First through hole; 722. Second through hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "first" and "second" are for the purpose of clearly describing the numbering of product components and do not represent any substantial difference. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances. In addition, the meaning of "multiple" is two or more. "And / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0029] Combine the following Figure 1-Figure 7 The semivolatile material capture device of the present invention is described.

[0030] like Figure 1 As shown, the semi-volatile substance capture device provided by the embodiment of the present invention includes a heater 1, a heating tube 2 and a capture material holder 3. The heater 1 has a first heating section 11 and a second heating section 12. The heating tube 2 runs through the heater 1. The heating tube 2 is provided with a volatilization zone and a capture zone, the volatilization zone is arranged corresponding to the first heating section 11, and the capture zone is arranged corresponding to the second heating section 12. The first heating section 11 is used to heat the solid semi-volatile substance 4 located in the volatilization zone, so that the solid semi-volatile substance 4 is converted into a gaseous semi-volatile substance. The capture material holder 3 is located in the capture zone, and the capture material holder 3 is used to accommodate the capture material. The gaseous semi-volatile substance can flow from the volatilization zone to the capture zone and be captured by the capture material.

[0031] The heating tube 2 may be a square tube, a round tube or other polygonal hollow tubular structures. The material of the heating tube 2 may be corundum, quartz, stainless steel, etc., which may be selected according to the working temperature. The heater 1 may be a multi-stage heating furnace, which is provided with at least two heating sections, including a first heating section 11 and a second heating section 12. The temperature of each heating section may be set separately, and the temperature may be set at any temperature between 100°C and 3000°C.

[0032] The end of the heating tube 2 near the volatilization zone is connected to an inflating device, through which carrier gas and / or reaction gas are introduced into the heating tube 2, and the carrier gas and / or reaction gas drive the gaseous semi-volatile substances to flow from the volatilization zone to the capture zone. Alternatively, the end of the heating tube 2 near the capture zone is connected to an exhaust device, and the exhaust device exhausts gas from the heating tube 2 to drive the gaseous semi-volatile substances to flow from the volatilization zone to the capture zone.

[0033] When the device is used to capture gaseous semi-volatile substances, solid semi-volatile substances 4 are placed in the volatilization zone of the heating tube 2, and the temperatures of the first heating section 11 and the second heating section 12 of the heater 1 are set according to the properties of the gaseous semi-volatile substances to be captured. The solid semi-volatile substances 4 are heated by the first heating section 11 to convert the solid semi-volatile substances 4 into gaseous semi-volatile substances. The gaseous semi-volatile substances flow from the volatilization zone to the capture zone, and the capture materials in the capture material holder 3 capture the semi-volatile substances.

[0034] The temperature required in the volatilization zone and the temperature required in the capture zone may be the same or different, and are specifically set according to the volatilization characteristics and capture characteristics of the semi-volatile substance.

[0035] The semi-volatile substance capturing device provided in the embodiment of the present invention is provided with a heating tube 2 in a heater 1, the volatilization zone of the heating tube 2 is heated by the first heating section 11 of the heater 1, the capturing zone of the heating tube 2 is heated by the second heating section 12, and a capturing material support 3 is provided in the capturing zone, so that the solid semi-volatile substance in the volatilization zone is heated and converted into a gaseous semi-volatile substance, and the gaseous semi-volatile substance flows to the capturing zone and is captured by the capturing material in the capturing material support 3. The semi-volatile substance capturing device of the present invention can set the temperature of the first heating section 11 and the second heating section 12 separately according to the properties of the gaseous semi-volatile substance to be captured, so that the solid semi-volatile substance is fully volatilized into a gaseous state at a preferred temperature, and the gaseous semi-volatile substance is captured by the capturing material at a preferred temperature, thereby improving the capturing effect of the semi-volatile substance, and facilitating the in-depth exploration and research of the volatilization and capturing characteristics of various semi-volatile substances in nuclear waste.

[0036] like Figure 4 , Figure 5 and Figure 6 As shown, in the semi-volatile substance capture device provided by the embodiment of the present invention, the capture material support 3 includes a support body 31 and an end cap. A baffle 311 is formed in the support body 31. The end cap and the baffle 311 are provided with air holes. The end cap is provided at the end of the support body 31, and a containing space is formed between the end cap and the baffle 311, and the containing space is used to contain the capture material.

[0037] Specifically, the support body 31 has a support portion and a baffle portion 311. The support portion is a cylindrical structure, which is coaxially arranged with the heating tube 2. The support portion can be a circular, square or other polygonal cylindrical structure, which is specifically adjusted according to the shape of the heating tube 2 so that the outer peripheral wall of the support portion is adapted to the shape of the inner peripheral wall of the heating tube 2.

[0038] Optionally, the support portion is a circular cylindrical structure, and the end cap is threadedly connected to the support body 31. Optionally, the capture material bracket 3 and the heating tube 2 are made of the same material, such as stainless steel.

[0039] The end cap, the support part and the baffle part 311 are arranged to form the accommodation space. The air holes on the end cap and the baffle part 311 are used to connect the accommodation space and the internal space of the heating tube 2, so that the gaseous semi-volatile substances can enter the capture material support 3 to react with the capture material, and the generated reaction gas can flow to the port of the heating tube 2.

[0040] The barrier portion 311 may be located at one end of the support portion, forming a support body 31 with an opening at one end, and when the end cover is disposed on the opening, a receiving space is formed between the end cover and the support body 31. Figure 4 As shown, the baffle 311 is located inside the support portion, forming a support body 31 with openings at both ends, and two end covers are respectively covered on the two openings, forming two accommodating spaces between the two end covers and the support body 31 .

[0041] In some embodiments, a plurality of capture material supports 3 are provided in the capture area of ​​the heating tube 2, and the plurality of capture material supports 3 are arranged along the length direction of the heating tube 2. In this way, the gaseous semi-volatile substances can be captured in multiple stages to achieve sufficient capture.

[0042] Among them, the heating tube 2 can be provided with multiple capture zones, and the multiple capture zones can correspond to different heating sections of the heater 1. The multiple capture zones are heated at different temperatures by the multiple heating sections, so that different gaseous semi-volatile substances can be captured in different capture zones.

[0043] like Figure 4 As shown, in some embodiments, the capture material support 3 includes a plurality of support bodies 31. The support body 31 includes a large diameter section 312 and a small diameter section 313 connected to each other, and the plurality of support bodies 31 are connected in sequence by sleeves of the large diameter section 312 on the small diameter section 313. The end cap includes a large end cap 32 and a small end cap 33, and the large end cap 32 and the small end cap 33 are both provided with a plurality of air holes. The large end cap 32 is provided at the end of the large diameter section 312 at one end of the capture material support 3, and the small end cap is provided at the end of the small diameter section 313 at the other end of the capture material support 3.

[0044] Specifically, the support portion of the cylindrical structure is configured with a large diameter section 312 and a small diameter section 313 along its axial direction. The multiple support bodies 31 are sleeved in sequence along the axial direction, that is, the large diameter section 312 of one support body 31 of each two adjacent support bodies 31 is sleeved on the small diameter section of the other support body 31. Optionally, the baffle 311 is arranged between the large diameter section 312 and the small diameter section 313.

[0045] The large end cap 32 is disposed on the outermost large diameter section 312 to form a containing space. The small end cap 33 is disposed on the outermost small diameter section 313 to form a containing space. Multiple containing spaces are formed between the baffles 311 of the multiple support bodies 31. The gaseous semi-volatile substance flows in from one end of the capture material support 3, reacts with the capture materials in the multiple containing spaces in turn, and then flows out from the other end.

[0046] For example, two supports 31 are connected to form a capture material support 3 with three accommodating spaces, realizing a three-level capture function. More supports 31 can be connected to realize more levels of capture functions. In practical applications, the number of supports 31 can be increased or decreased according to the type and characteristics of the gaseous semi-volatile substances to be captured and the capture effect to be achieved.

[0047] Optionally, the large diameter section 312 and the small diameter section 313 are both circular cylindrical structures, and accordingly, the large end cover 32 and the small end cover 33 are correspondingly circular covers. The large end cover 32 is threadedly connected to the large diameter section 312, and the small end cover 33 is threadedly connected to the small diameter section 313.

[0048] like Figure 3 As shown, the baffle 311 is provided with a plurality of first air holes 3111 arranged in a circular array, forming a mesh-like porous structure. The large end cap 32 is provided with a plurality of second air holes 323 arranged in a circular array, forming a mesh-like porous structure. The small end cap 33 is provided with a plurality of third air holes 331 arranged in a circular array, forming a mesh-like porous structure. Optionally, the diameters of the first air holes 3111, the second air holes 323 and the third air holes 331 are not less than 5 mm, so that the capture material support 3 itself does not form air blockage.

[0049] like Figure 5 As shown, in some embodiments of the present invention, the large end cover 32 has a cover body 321 and a connecting portion 322 that are coaxially connected. The large diameter section 312 is sleeved on the outside of the connecting portion 322, and the small end cover 33 is sleeved on the outside of the small diameter section 313. The outer diameter of the cover body 321, the outer diameter of the large diameter section 312 and the outer diameter of the small end cover 33 are the same. It can be understood that the outer diameter of the cover body 321 is greater than the outer diameter of the connecting portion 322, and the connecting portion 322 is convexly arranged on the side of the cover body 321 facing the support body 31.

[0050] Alternatively, see Figure 5The outer side surface of the connecting portion 322 is provided with a first outer thread 3221, the inner side surface of the large diameter section 312 is provided with a first inner thread 3121, and the connecting portion 322 is threadedly connected with the large diameter section 312. Figure 6 The inner side of the small end cap 33 is provided with a second inner thread 332, the outer side of the small diameter section 313 is provided with a second outer thread 3131, and the small diameter section 313 is threadedly connected to the small end cap 33. The threaded connection method can realize the rapid disassembly and assembly between multiple support bodies 31.

[0051] Among them, the outer diameter of the cover body 321, the outer diameter of the large diameter section 312 and the outer diameter of the small end cover 33 are the same, so that the outer peripheral surface of the cover body 321, the outer peripheral surface of the large diameter section 312 and the outer peripheral surface of the small end cover 33 are located on the same cylindrical surface, so that the capture material bracket 3 as a whole has good coaxiality with the heating tube 2, so that the outer peripheral surface of the capture material bracket 3 and the inner peripheral surface of the heating tube 2 are closely matched, so as to reduce or eliminate the gap between the capture material bracket 3 and the inner wall of the heating tube 2, thereby reducing or avoiding the escape of gaseous semi-volatile substances from the gap between the capture material bracket 3 and the heating tube 2.

[0052] like Figure 1 As shown, the semi-volatile substance capture device provided in the embodiment of the present invention further includes a sealing structure 5. The sealing structures 5 are respectively installed at both ends of the heating tube 2, and the sealing structures 5 are sealed and connected to the heating tube 2. One of the sealing structures 5 is provided with an air inlet 61, and the other sealing structure 5 is provided with a first air outlet 62.

[0053] Specifically, the sealing structure 5 includes a first flange, a second flange, a mounting portion, and a sealing ring. The mounting portion is a cylindrical structure, the first flange is coaxially fixedly connected to the mounting portion, the mounting portion is coaxially sleeved with the end of the heating tube 2, and a sealing ring is provided between the mounting portion and the heating tube 2 to prevent the gaseous semi-volatile gas from leaking from between the mounting portion and the heating tube 2. An air pipe is provided on the side of the second flange away from the first flange, and the air pipe is connected to the heating tube 2.

[0054] The air pipe of one sealing structure 5 serves as the air inlet 61, and the air pipe of the other sealing structure 5 serves as the first air outlet 62. The carrier gas and / or the reaction gas can be introduced into the heating tube 2 from the air inlet 61, driving the gaseous semi-volatile substances to flow in the heating tube 2 and migrate from the volatilization area to the capture area.

[0055] Among them, a sealing ring is provided between the first flange and the second flange. The first flange and the second flange are connected by a plurality of bolts, so that the sealing ring is deformed to achieve a sealed connection between the first flange and the second flange. When solid semi-volatile substances need to be added into the heating tube 2, the second flange is opened, and after the materials are added, the second flange is mounted back on the first flange to achieve quick disassembly and assembly.

[0056] It should be noted that the sealing structure 5 in this embodiment is not limited to the above-mentioned flange structure, and can also be other structural forms, such as a sealing door structure, and the embodiment of the present invention does not make specific limitations on this.

[0057] like Figure 2 As shown, in the embodiment of the present invention, the side wall of the heating tube 2 is provided with a second air outlet 63, and the second air outlet 63 is used to connect an external exhaust device. Before adding solid semi-volatile substances into the heating tube 2, the gaseous semi-volatile substances remaining in the heating tube 2 can be extracted by the exhaust device to prevent them from leaking into the environment. The second air outlet 63 can be arranged on the side of the capture zone away from the volatilization zone, and the gaseous semi-volatile substances in the heating tube 2 can be driven to flow by the exhaust device.

[0058] like Figure 1 As shown, the semi-volatile substance capture device provided in the embodiment of the present invention further includes a cooler 7. A cooler is provided between the heater 1 and one end of the heating tube 2, and another cooler 7 is provided between the heater 1 and the other end of the heating tube 2. The cooler 7 is used to cool the heating tube 2.

[0059] The portion of the heating tube 2 located inside the heater 1 is the effective heating section of the heating tube 2. The portion between one end of the heating tube 2 and the heater 1 and the portion between the other end of the heating tube 2 and the heater 1 are cooled by the cooler 7, which can prevent the heat of the heating tube 2 from being transferred to both ends of the heating tube 2, thereby preventing the sealing ring of the sealing structure 5 from failing due to high temperature and causing gas leakage, thereby ensuring a good sealing effect of the sealing structure 5 on the heating tube 2.

[0060] Optionally, the heater 1 is a three-stage heating furnace, and the temperature of each stage is adjustable from room temperature to 1500°C. The heating tube 2 is made of high-temperature resistant stainless steel and can withstand a high temperature of 1200°C. The heating tube 2 is a cylindrical hollow tubular structure with an outer diameter of 60 mm, an inner diameter of 50 mm, and a total length of 1300 mm. The length of the heating tube in the heater 1 is the effective length, which is about 750 mm.

[0061] The cooler 7 includes a housing 71, which is provided with a cooling liquid inlet 711 and a cooling liquid outlet 712. The heating tube 2 is passed through the housing 71, and the heating tube 2 and the housing 71 are surrounded to form a cooling cavity, which is connected to the cooling liquid inlet 711 and the cooling liquid outlet 712.

[0062] Specifically, the cooler 7 includes an annular shell and end covers, the two ends of the annular shell are respectively connected to the end covers, the heating tube 2 is inserted into the annular shell and the two end covers, and the annular shell, the heating tube 2 and the two end covers are surrounded to form a cooling cavity. The coolant inlet 711 and the coolant outlet 712 are arranged on the annular shell and are arranged on both sides of the heating tube 2. The coolant absorbs the heat of the heating tube 2 in the process of flowing from the coolant inlet 711 to the coolant outlet 712. Optionally, the coolant can be tap water, deionized water or ethanol, etc., which can be selected according to the cooling requirements.

[0063] Optionally, the shell of the cooler 7 and the heating tube 2 are made of the same material and are connected to the heating tube 2 by welding.

[0064] Furthermore, the cooler 7 also includes a liquid resistance structure 72. The liquid resistance structure 72 is sleeved on the heating tube 2 and divides the cooling cavity into a first cooling cavity and a second cooling cavity. The liquid resistance structure 72 is provided with a plurality of through holes, and the through holes connect the first cooling cavity and the second cooling cavity. The cooling liquid inlet 711 is connected to the first cooling cavity, and the cooling liquid outlet 712 is connected to the second cooling cavity.

[0065] It can be understood that the coolant enters the first cooling cavity from the coolant inlet 711, then flows through the multiple through holes of the liquid resistance structure 72 into the second cooling cavity, and finally flows out from the coolant outlet 712. The liquid resistance structure 72 can force the coolant in the first cooling cavity to flow toward the second cooling cavity along the axial direction of the heating tube 2, thereby increasing the contact time and contact area between the coolant and the heating tube 2, and improving the cooling efficiency of the heating tube 2.

[0066] like Figure 7 As shown, the liquid resistance structure 72 is provided with a first through hole 721 and a second through hole 722. A plurality of first through holes 721 are distributed around the heating tube 2, and a plurality of second through holes 722 are distributed around the heating tube 2 and are located between the heating tube 2 and the plurality of first through holes 721. The aperture of the second through hole 722 is smaller than the aperture of the first through hole 721.

[0067] Specifically, the plurality of first through holes 721 are arranged in a circular array with the heating tube 2 as the center, and the plurality of second through holes 722 are arranged in a circular array with the heating tube 2 as the center, and the plurality of first through holes 721 are located at the periphery of the plurality of second through holes 722. The aperture of the second through hole 722 is smaller than the aperture of the first through hole 721, so that the flow velocity of the coolant close to the heating tube 2 is greater than the flow velocity of the coolant far from the heating tube 2, thereby improving the heat exchange coefficient between the coolant and the heating tube 2. In addition, the flow resistance of the coolant close to the heating tube 2 is greater than the flow resistance of the coolant far from the heating tube 2, thereby increasing the turbulence of the coolant close to the heating tube 2 and improving the heat exchange efficiency.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A semi-volatile substance capture device, characterized in that: include: A heater having a first heating section and a second heating section; A heating tube runs through the heater, and the heating tube is provided with a volatilization zone and a capture zone, wherein the volatilization zone is arranged corresponding to the first heating section, and the capture zone is arranged corresponding to the second heating section; the first heating section is used to heat the solid semi-volatile substance in the volatilization zone to convert the solid semi-volatile substance into a gaseous semi-volatile substance; The capture material support is located in the capture area and is used to accommodate the capture material. The gaseous semi-volatile substance can flow from the volatilization area to the capture area and be captured by the capture material.

2. The semi-volatile substance capture device according to claim 1, characterized in that: The capture material bracket includes: a support body and an end cover, the support body is formed with a baffle, the end cover and the baffle are both provided with a plurality of air holes, the end cover is arranged at the end of the support body, a containing space is formed between the end cover and the baffle, and the containing space is used to accommodate the capture material.

3. The semi-volatile substance capture device according to claim 2, characterized in that: There are multiple supports, each of which has a large diameter section and a small diameter section connected to each other, and the multiple supports are connected in sequence by sleeve-mounting the large diameter section on the small diameter section; The end cover includes a large end cover and a small end cover, and the large end cover and the small end cover are both provided with a plurality of air holes. The large end cover is arranged on the end of the large diameter section at one end of the capture material support, and the small end cover is arranged on the end of the small diameter section at the other end of the capture material support.

4. The semi-volatile substance capture device according to claim 3, characterized in that: The large end cover has a cover body and a connecting portion coaxially connected, the large diameter section is sleeved on the outside of the connecting portion, and the small end cover is sleeved on the outside of the small diameter section. The outer diameters of the cover body, the large diameter section and the small end cover are the same.

5. The semi-volatile substance capture device according to claim 1, characterized in that: A plurality of the capture material supports are arranged in the capture area of ​​the heating tube, and the plurality of the capture material supports are arranged along the length direction of the heating tube.

6. The semi-volatile substance capture device according to claim 1, characterized in that: Also includes: Sealing structure: sealing structures are respectively installed at both ends of the heating tube, and the sealing structures are sealed and connected to the heating tube, wherein one of the sealing structures is provided with an air inlet, and the other sealing structure is provided with a first air outlet.

7. The semi-volatile substance capture device according to claim 6, characterized in that: Also includes: A cooler is provided between the heater and one end of the heating tube, and another cooler is provided between the heater and the other end of the heating tube, and the cooler is used to cool the heating tube.

8. The semi-volatile substance capture device according to claim 7, characterized in that: The cooler comprises: a shell, the shell is provided with a coolant inlet and a coolant outlet, the heating pipe is passed through the shell, the heating pipe and the shell are surrounded to form a cooling cavity, and the cooling cavity is connected with the coolant inlet and the coolant outlet.

9. The semi-volatile substance capture device according to claim 8, characterized in that: The cooler also includes: a liquid resistance structure, which is sleeved on the heating tube and divides the cooling cavity into a first cooling cavity and a second cooling cavity; the liquid resistance structure is provided with a plurality of through holes, which connect the first cooling cavity and the second cooling cavity, the cooling liquid inlet is connected to the first cooling cavity, and the cooling liquid outlet is connected to the second cooling cavity.

10. The semi-volatile substance capture device according to claim 9, characterized in that: The liquid resistance structure is provided with a first through hole and a second through hole, wherein a plurality of the first through holes are distributed around the heating tube, and a plurality of the second through holes are distributed around the heating tube and are located between the heating tube and the plurality of the first through holes, and the aperture of the second through hole is smaller than the aperture of the first through hole.

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