Wide temperature range reaction flow tube

Abstract

The utility model belongs to the technical field of experimental equipment, and relates to a wide-temperature-range reaction flow tube which comprises a reaction tube, a shell and a circulating cavity, the plurality of ultraviolet lamps are arranged in the circulating cavity and are uniformly arranged around the reaction tube; the sleeves are in one-to-one correspondence with the ultraviolet lamps, each sleeve is arranged on the corresponding ultraviolet lamp in a sleeving manner, the two ends of each sleeve are fixedly connected with the inner wall of the shell, and each sleeve is of a transparent structure; and the cooling circulation assembly is communicated with the circulation cavity and is used for continuously injecting cooling liquid into the circulation cavity to cool the plurality of ultraviolet lamps, so that the temperature in the reaction tube is kept stable. According to the utility model, the cooling liquid can be continuously injected into the circulating cavity through the cooling circulating assembly to cool the plurality of ultraviolet lamps, so that the temperature in the reaction tube is kept stable, the temperature rise in the reaction tube caused by heating when the ultraviolet lamps work is avoided, and the stability and the accuracy of gas reaction are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to experimental equipment technical field relates to a wide temperature range reaction flow pipe. BACKGROUND

[0002] Secondary organic aerosol (SOA) as an important component of atmospheric fine particulate matter (PM2.5), its generation mechanism and physicochemical properties are closely related to environmental temperature, and may be affected by extreme temperature conditions under the background of climate change. Therefore, clarifying the influence of temperature conditions, especially extreme temperature, on the generation mechanism and physicochemical properties of SOA is very important for in-depth understanding of the regional PM2.5 pollution mechanism under the background of climate change.

[0003] At present, in the laboratory research of SOA, smoke box and oxidation flow reactor are often used to simulate the SOA generation process, but the wall effect (deposition loss or heterogeneous reaction) of the smoke box may cause obvious error in the experimental results. The oxidation flow reactor can produce highly oxidized conditions to simulate accelerated atmospheric chemical processes, and due to the short residence time of gas therein, the wall effect can be reduced to a certain extent. However, since the ultraviolet lamp is arranged in the reaction flow reactor, the ultraviolet lamp will heat when working, which is easy to cause the temperature in the reaction flow reactor to rise, resulting in the decrease of stability and accuracy of gas reaction, and affecting the research on SOA. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a wide temperature range reaction flow pipe, which can avoid the temperature rise in the reaction flow pipe caused by the heating of the ultraviolet lamp in the reaction flow reactor when working, and improve the stability and accuracy of gas reaction.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0006] A wide temperature range reaction flow pipe, comprising a reaction tube, further comprising:

[0007] A shell is sleeved outside the reaction tube, and the two ends of the reaction tube are fixedly connected with the inner wall of the shell, so that a circulating cavity is formed between the shell and the reaction tube;

[0008] A plurality of ultraviolet lamps are arranged in the circulating cavity and uniformly arranged around the reaction tube;

[0009] A plurality of sleeves correspond to the plurality of ultraviolet lamps one by one, each sleeve is sleeved on the corresponding ultraviolet lamp, and the two ends of each sleeve are fixedly connected with the inner wall of the shell; each sleeve is a transparent structure;

[0010] A cooling circulating assembly is in communication with the circulating cavity and used for continuously injecting cooling liquid into the circulating cavity to cool the plurality of ultraviolet lamps, so that the temperature in the reaction tube remains stable.

[0011] The utility model discloses a feature still lies in:

[0012] The cooling circulation assembly includes:

[0013] The water bath device is used for continuously providing cooling liquid, and the water bath device has an inlet and an outlet, and the two ends of the shell are respectively provided with a circulation inlet and a circulation outlet, and the circulation inlet and the circulation outlet are respectively communicated with the circulation cavity, and the outlet of the water bath device is connected with the circulation inlet, and the inlet of the water bath device is connected with the circulation outlet.

[0014] The shell is horizontally arranged in a cylindrical structure, and the circulation inlet is located below the circulation outlet.

[0015] The two ends of the shell are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively communicated with the reaction tube, and the air outlet is provided with a temperature sensor, and the temperature sensor is used for detecting the temperature in the reaction tube.

[0016] The shell is provided with a heat preservation layer on the outside.

[0017] Each sleeve is made of quartz glass material.

[0018] The shell is a cylindrical structure, the circulation inlet is located at one end of the shell close to the lower part, and the circulation outlet is located at the other end of the shell close to the upper part.

[0019] Each ultraviolet lamp is a mercury oxide lamp.

[0020] The thickness of the circulation cavity is 9mm-11mm.

[0021] The utility model discloses a wide temperature range reaction flow pipe has the following advantages:

[0022] First, through the cooperation of the reaction tube, the shell, the plurality of ultraviolet lamps, the plurality of sleeves and the cooling circulation assembly, the cooling circulation assembly can be used to continuously inject cooling liquid into the circulation cavity to cool the plurality of ultraviolet lamps, so that the temperature in the reaction tube remains stable, thereby avoiding the temperature rise in the reaction tube caused by the heating of the ultraviolet lamp during operation, and improving the stability and accuracy of the gas reaction.

[0023] Second, the temperature control range of the existing reaction flow device is 280K-310K, and the temperature control range is narrow, and the water bath refrigeration system and the temperature control sensor are adopted in the application, so that the wide temperature range of 240K-310K can be realized, the more extreme low-temperature environment can be simulated, the SOA generation process and the physicochemical properties thereof under low temperature can be studied, and a more accurate and reliable experimental environment is provided for the gas reaction. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the front view structure schematic drawing of the utility model.

[0025] Figure 2 It is the left view structure schematic diagram of the utility model.

[0026] Reference signs:

[0027] 1, shell; 2, reaction tube; 3, circulating cavity; 4, circulating inlet; 5, circulating outlet; 6, temperature sensor; 7, ultraviolet lamp; 8, sleeve. DETAILED DESCRIPTION

[0028] The technical solutions in the application will be clearly and completely described below with reference to the drawings. In the description of the embodiments of the application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B: "and / or" in the text only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the application, "multiple" means two or more than two. The following terms "first" "second" are only for the purpose of description, and cannot be understood as implying or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" "second" can explicitly or implicitly include one or more features.

[0029] As shown in Figure 1 , Figure 2 The utility model provides a kind of wide temperature range reaction flow pipe, including reaction tube 2, shell 1, multiple ultraviolet lamps 7, multiple sleeves 8 and cooling circulation component, shell 1 is sleeved in reaction tube 2 outside, the both ends of reaction tube 2 are respectively fixedly connected with the inner wall of shell 1, so that circulating cavity is formed between shell 1 and reaction tube 2, multiple ultraviolet lamps 7 are arranged in circulating cavity 3 and are evenly arranged around reaction tube 2, multiple sleeves 8 and multiple ultraviolet lamps 7 correspond one by one, each sleeve 8 is sleeved on corresponding ultraviolet lamp 7, the both ends of each sleeve 8 are respectively fixedly connected with the inner wall of shell 1, each sleeve 8 is transparent structure, cooling circulation component is communicated with circulating cavity 3, cooling circulation component is used to inject cooling liquid into circulating cavity 3 constantly to cool multiple ultraviolet lamps 7, so that the temperature in reaction tube 2 remains stable, to avoid that the temperature in reaction tube 2 is increased when ultraviolet lamp 7 works, improve the stability and accuracy of gas reaction.

[0030] Among them, reaction tube 2 is quartz tube, it is convenient to transmit light, adopt high-precision quartz tube, its advantage lies in optical transparency and high temperature resistance, at the same time, stainless steel pipe or glass fiber pipe can also be used as alternative material, although the transparency of these materials is poor, but it has better mechanical strength and corrosion resistance, can be used in some extreme environment, especially in high pressure or strong corrosive gas experiment, these alternative materials can be more suitable.

[0031] As shown in Figure 1 , the cooling circulation assembly comprises a water bath device for continuously providing cooling liquid, which is preferably a JULABO TopTech ultra-low temperature heating refrigeration circulator FP51-SL, and has an inlet and an outlet. The housing 1 has a circulation inlet 4 and a circulation outlet 5 at both ends, respectively, which are in communication with the circulation cavity 3. The outlet of the water bath device is connected with the circulation inlet 4, and the inlet of the water bath device is connected with the circulation outlet 5. The water bath device is started to send cooling liquid into the circulation cavity 3 through the circulation inlet 4 to cool the plurality of ultraviolet lamps 7.

[0032] As shown in Figure 1 , the housing 1 is horizontally arranged in a cylindrical structure, and the circulation inlet 4 is located below the circulation outlet 5, so that the cooling liquid enters from the lower part of the circulation cavity 3 and is discharged from the upper part of the circulation cavity 3, forming a fluid structure of entering from the lower part and discharging from the upper part, avoiding the stagnation of gas in the circulation cavity 3, and achieving sufficient cooling of the corresponding ultraviolet lamp 7 in each sleeve 8 by the cooling liquid in the circulation cavity 3. At the same time, the circulation inlet 4 is provided with an adjusting valve to adjust the flow rate of the cooling liquid, so as to further stabilize the temperature in the reaction tube 2.

[0033] As shown in Figure 1 , the housing 1 is provided with an air inlet and an air outlet at both ends, respectively, which are in communication with the reaction tube 2. The air outlet is provided with a temperature sensor 6 for detecting the temperature in the reaction tube 2, so as to adjust the outlet temperature of the bath device through the detected temperature, and further stabilize the temperature in the reaction tube 2.

[0034] Among them, the housing 1 is provided with a heat preservation layer on the outside, which reduces the heat exchange between the cooling liquid in the circulation cavity 3 and the outside, thereby improving the cooling effect of the cooling liquid.

[0035] As shown in Figure 1 , each sleeve 8 is made of quartz glass material to improve the light transmission effect of the corresponding ultraviolet lamp 7 in each sleeve 8, so as to ensure that the gas reaction in the reaction tube 2 proceeds normally and the cooling liquid does not damage the ultraviolet lamp 7.

[0036] As shown in Figure 1 , Figure 2 , each ultraviolet lamp 7 is a mercury oxide lamp, which improves the effect of gas reaction in the reaction tube 2.

[0037] Among them, the air inlet of the housing 1 is provided with an open-close type small table plate, which is convenient for adding expansion equipment such as mass flow meter. This design makes the application more flexible and can adapt to different research needs and expansion of equipment functions.

[0038] AsFigure 2 As shown, the thickness of the circulating cavity 3 is 9mm-11mm, preferably 10mm, so that the coolant can fully cool the plurality of ultraviolet lamps 7 after filling the circulating cavity 3, improve the cooling effect, and further improve the stability and accuracy of the gas reaction.

[0039] The wide temperature range reaction flow tube has the following advantages:

[0040] First, through the cooperation of the reaction tube, the shell, the plurality of ultraviolet lamps, the plurality of sleeves and the cooling circulating assembly, the cooling circulating assembly can be used to continuously inject coolant into the circulating cavity to cool the plurality of ultraviolet lamps, so that the temperature in the reaction tube remains stable, thereby avoiding the temperature rise in the reaction tube caused by the heating of the ultraviolet lamp during operation, and improving the stability and accuracy of the gas reaction.

[0041] Second, the temperature control range of the existing reaction flow device is 280K-310K, and the temperature control range is relatively narrow, while the water bath refrigeration system and the temperature control sensor are adopted in the present application, so that the wide temperature range of 240K-310K can be realized, the more extreme low-temperature environment can be simulated, the SOA generation process and its physicochemical properties under low temperature can be studied, and a more accurate and reliable experimental environment is provided for the gas reaction.

[0042] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model.In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model.Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A wide temperature range reaction flow tube, comprising a reaction tube (2), characterized in that, Also includes: The shell (1) is sleeved on the outside of the reaction tube (2), and the two ends of the reaction tube (2) are fixedly connected to the inner wall of the shell (1) respectively, so that a circulation cavity (3) is formed between the shell (1) and the reaction tube (2); Multiple ultraviolet lamps (7) are set inside the circulation chamber (3) and are evenly arranged around the reaction tube (2); Multiple sleeves (8) correspond one-to-one with multiple ultraviolet lamps (7). Each sleeve (8) is fitted onto the corresponding ultraviolet lamp (7). Both ends of each sleeve (8) are fixedly connected to the inner wall of the housing (1). Each sleeve (8) is a transparent structure. The cooling circulation assembly is connected to the circulation chamber (3) and is used to continuously inject coolant into the circulation chamber (3) to cool multiple ultraviolet lamps (7) so that the temperature inside the reaction tube (2) remains stable.

2. The wide temperature range reaction flow tube according to claim 1, characterized in that, The cooling cycle assembly includes: A water bath device is used to continuously supply coolant. The water bath device has an inlet and an outlet. The two ends of the housing (1) are respectively provided with a circulation inlet (4) and a circulation outlet (5). The circulation inlet (4) and the circulation outlet (5) are respectively connected to the circulation chamber (3). The outlet of the water bath device is connected to the circulation inlet (4), and the inlet of the water bath device is connected to the circulation outlet (5).

3. The wide temperature range reaction flow tube according to claim 2, characterized in that, The housing (1) is a horizontally arranged cylindrical structure, and the circulation inlet (4) is located below the circulation outlet (5).

4. The wide temperature range reaction flow tube according to claim 1, characterized in that, The shell (1) is provided with an air inlet and an air outlet at both ends, respectively. The air inlet and the air outlet are connected to the reaction tube (2). The air outlet is provided with a temperature sensor (6), which is used to detect the temperature inside the reaction tube (2).

5. The wide temperature range reaction flow tube according to claim 1, characterized in that, An insulation layer is provided on the outside of the shell (1).

6. The wide temperature range reaction flow tube according to claim 1, characterized in that, Each of the sleeves (8) is made of quartz glass.

7. The wide temperature range reaction flow tube according to claim 1, characterized in that, Each of the ultraviolet lamps (7) is a mercury oxide lamp.

8. The wide temperature range reaction flow tube according to claim 1, characterized in that, The thickness of the circulation chamber (3) is 9mm to 11mm.

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