High-temperature gas tank and flue gas analyzer

Abstract

The utility model provides a high-temperature gas tank and a flue gas analyzer. Relates to the technical field of gas detection devices, and comprises a main body, a first mounting seat and a second mounting seat, the first mounting seat is arranged at one end of the main body, two parallel collimating mirrors are embedded in one side, facing the main body, of the first mounting seat, a first fixing part is arranged on one side, close to the main body, of each collimating mirror, and the first fixing parts are fixedly connected with the first mounting seat and press the collimating mirrors; the second mounting base is located at the end, away from the first mounting base, of the main body, a first reflector is embedded in the second mounting base, the two sides of the first reflector are provided with a buffering pressing piece and a second fixing piece respectively so as to clamp the first reflector, and the second fixing piece is fixedly connected with the second mounting base; and ultraviolet light enters the main body from one collimating mirror, is reflected by the first reflecting mirror and then exits from the main body from the other collimating mirror. The utility model has the effect of reducing the influence of glue volatilization on the lens.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection devices, in particular to a high-temperature gas pool and a flue gas analyzer. Background Art

[0002] With the continuous advancement of refined management of air pollution prevention and control, the supervision of fixed waste gas pollution sources with point distribution is urgent. The continuous emission monitoring system (CEMS) plays an increasingly important role in air pollution control due to its advantages such as continuity and traceability. The cold-drying method is the mainstream sampling method of CEMS in China, but in actual projects, the flue gas treatment system has problems such as condensed water and easy water accumulation in the pipeline, which will cause water-soluble components in the flue gas such as SO2 and NO2 to be adsorbed by water, resulting in problems such as long system response time and low measurement data. The pretreatment technology of the hot-wet CEMS system is extraction-type full-process heating, that is, after the flue gas is extracted from the monitoring pipeline, it is treated with heat preservation and heating to always maintain its temperature above the dew point, and then passed into the gas analysis pool until the analysis is completed. Compared with the cold-drying method, it can save various complex condensation pretreatment equipment and drainage devices, and has a longer service life and more reliable operation.

[0003] The existing patent CN116818695A discloses a corrosion-resistant ultra-low-range flue gas analyzer, in which an ultraviolet xenon lamp light source, an ultra-low-range gas absorption cell and an ultraviolet spectrometer are arranged in the instrument housing, and the three are connected by optical fiber. However, the temperature of the high-temperature flue gas to be measured is usually high, which can reach 350°C or above, and the optical fiber connection unit of the gas analysis cell, as well as the reflector and lens unit in the optical cell are usually fixed with organic compounds such as epoxy resin. Under high temperature and strong ultraviolet conditions, oxygen will be stimulated to produce ozone. These organic compounds are easily aged and decomposed by ozone at high temperature, thereby contaminating the lens and optical fiber and affecting the spectrum signal. Utility Model Content

[0004] In order to improve the situation that organic compounds such as epoxy resin may pollute lenses and optical fibers after decomposition, the utility model provides a high-temperature gas pool and a flue gas analyzer.

[0005] On the one hand, the utility model provides a high temperature gas pool, which adopts the following technical solutions:

[0006] A high temperature gas pool comprising

[0007] A main body, wherein a reflective cavity is formed in the main body;

[0008] A first mounting seat is arranged at one end of the main body, wherein two parallel collimating mirrors are embedded in the first mounting seat on the side facing the main body, and a first fixing member is arranged on the side of the collimating mirror close to the main body, and the first fixing member is fixedly connected to the first mounting seat and presses the collimating mirror;

[0009] A second mounting seat is located at an end of the main body away from the first mounting seat, a first reflector is embedded in the second mounting seat, a buffer pressure piece and a second fixing piece are respectively provided on both sides of the first reflector to clamp the first reflector, and the second fixing piece is fixedly connected to the second mounting seat;

[0010] The ultraviolet light enters the main body from one of the collimating mirrors, is reflected by the first reflecting mirror, and then exits the main body from the other collimating mirror.

[0011] Furthermore, a sealing press piece is provided between the collimating lens and the first fixing piece, and the sealing press piece and the first fixing piece are interference fitted, and the first fixing piece presses the collimating lens through the sealing press piece.

[0012] Furthermore, a first reflector pressing piece is provided between the first reflector and the second fixing piece, and the second fixing piece presses the collimating mirror through the first reflector pressing piece.

[0013] Furthermore, the first mounting seat is embedded with a second reflector between the two collimating mirrors, and the second reflector is provided with corresponding second reflector pressing parts and third fixing parts in sequence on the side close to the main body, the third fixing part is fixedly connected to the first mounting seat, the second reflector pressing parts are distributed at the upper and lower ends of the second reflector, and are interference fitted with the third fixing part, and the third fixing part presses the second reflector through the second reflector pressing part.

[0014] Furthermore, the main body is coated with a heating unit, and the heating unit includes two heating plates respectively covering the main body from upper and lower sides, and is used to heat the smoke in the main body.

[0015] Furthermore, the heating unit is coated with a heat preservation unit, and the heat preservation unit includes two heat preservation plates respectively covering the heating plate from upper and lower sides to isolate the heat of the heating plate.

[0016] Furthermore, a detection sensor is provided on the side wall of the main body, and the detection sensor is covered by the heating plate. The probe of the detection sensor is inserted into the reflection cavity to measure the oxygen content and water content of the internal high-temperature gas in real time.

[0017] Furthermore, an air inlet is provided on a side wall of the main body close to one end of the second mounting seat, and a filter unit is provided on the side wall of the main body corresponding to the air inlet for filtering the intake air.

[0018] On the other hand, the utility model provides a flue gas analyzer, including the high-temperature gas pool as described above, and a chassis, the internal space of the chassis is divided into a high-temperature zone and a normal temperature zone independent of each other, and the main body is located in the high-temperature zone.

[0019] Furthermore, a light source unit and a spectrometer unit are provided in the normal temperature zone of the chassis. The light source unit guides ultraviolet light into the main body through optical fiber, and the spectrometer unit receives light reflected from the main body through optical fiber.

[0020] In summary, the present invention has at least one of the following beneficial effects:

[0021] 1. By adopting a glue-free fixing method in which the mounting seat and the fixing piece clamp the collimator or the first reflector from both sides, each lens is stably fixed at both ends of the main body, so that there is no need to apply epoxy resin or other compounds to the lens to fix it, which solves the problem of the aging and volatilization of the lens bonding glue under high temperature and strong ultraviolet conditions affecting the instrument detection signal;

[0022] 2. By arranging a sealing pressure piece between the collimating lens and the first fixing piece, and the sealing pressure piece and the first fixing piece are interference fit, the first fixing piece can further press the collimating lens through the sealing pressure piece, and the sealing pressure piece is deformed after being pressed, so as to effectively seal the collimating lens; at the same time, the third fixing piece presses the second reflector through the second reflector pressure piece, so that the metal does not contact the lens, effectively avoiding the lens from being broken due to collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded view of the utility model embodiment 1 showing the lens installation structure in the gas pool;

[0024] Figure 2 This is an exploded view showing the overall structure of the gas pool in Example 1 of the utility model;

[0025] Figure 3 This is a schematic diagram showing the internal structure of the flue gas analyzer according to Example 2 of the utility model.

[0026] Explanation of the accompanying drawings: 1. Main body; 11. Reflection cavity; 12. Air inlet; 13. Filter unit; 14. Detection sensor; 2. First mounting seat; 21. Collimating mirror; 22. First fixing piece; 23. Sealing pressure piece; 24. Second reflector; 25. Second reflector pressure piece; 26. Third fixing piece; 3. Second mounting seat; 31. First reflector; 32. Buffer pressure piece; 33. First reflector pressure piece; 34. Second fixing piece; 4. Heating plate; 5. Insulation plate; 6. Chassis; 61. High temperature zone; 62. Normal temperature zone; 63. Light source unit; 64. Spectrometer unit; 7. High temperature optical fiber; 8. Cooling fan; 9. Heating fan; 10. High temperature gas pool. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the following will further describe the implementation of the utility model in conjunction with the accompanying drawings. The following is a preferred embodiment of the utility model among multiple possible embodiments, which is intended to provide a basic understanding of the utility model, but is not intended to confirm the key or decisive elements of the utility model or limit the scope of protection.

[0028] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0030] In the description of the present utility model, it should be noted that the circuits, electronic components and modules involved in the present utility model are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present utility model does not involve improvements to the internal structure and methods.

[0031] It should be further explained that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] Embodiment 1 of the present invention provides a high temperature gas pool, referring to Figure 1 and Figure 2 The high temperature gas pool 10 comprises a main body 1, a first mounting seat 2, and a second mounting seat 3, wherein the main body 1 is in the shape of a rectangular parallelepiped as a whole, and the first mounting seat 2 and the second mounting seat 3 are respectively located at two ends of the main body 1. A reflective cavity 11 is provided inside the main body 1, and the reflective cavity 11 is used to accommodate the gas such as smoke to be detected, and both ends of the main body 1 are through openings for ultraviolet light to enter.

[0034] An air inlet 12 is provided on the side wall of the main body 1 near one end of the second mounting seat 3. The air inlet 12 can be connected to an external pipeline, and the smoke to be detected can enter the reflective cavity 11 through the air inlet 12. A filter unit 13 is fixed on the side wall of the main body 1 corresponding to the air inlet 12. The filter unit 13 is an independent installation unit and can be fixed to the main body 1 by a detachable connection method such as bolt connection, which is convenient for later replacement. A high-temperature sintered filter element is used inside the filter unit 13 to filter the incoming smoke. The filtering accuracy can be customized according to the actual working conditions, effectively protecting the internal components of the gas pool, and greatly extending the life and maintenance cycle of the gas pool.

[0035] Reference Figure 1 The first mounting seat 2 is a fiber mounting seat. The first mounting seat 2 is used to mount the optical fiber on the side away from the main body 1. Two collimating lenses 21 are embedded in the first mounting seat 2 facing the main body 1. A groove area for accommodating the collimating lenses 21 is integrally formed in the first mounting seat 2. The collimating lenses 21 are provided with a first fixing member 22 and a sealing member 23 on the side close to the main body 1. The sealing member 23 is made of a high temperature resistant material to reduce aging at high temperatures. The first fixing member 22 is made of metal.

[0036] During installation, the first fixing member 22 compresses and fixes the collimator 21 in the first mounting seat 2 by pressing the sealing pressing member 23, and finally the first fixing member 22 is fixed to the first mounting seat 2 by fastening screws. The sealing pressing member 23 and the first fixing member 22 are fitted by interference, and the specific interference fitting method can be that the thickness of the sealing pressing member 23 is greater than the distance between the first fixing member 22 and the collimator 21, so that the first fixing member 22 squeezes and deforms the sealing pressing member 23 during the fastening process, thereby achieving the function of fixing the collimator 21 and sealing.

[0037] At the same time, the second mounting seat 3 is a reflector mounting seat, and a through hole corresponding to the opening at the end of the main body 1 is opened through the center of the second mounting seat 3, and a first reflector 31 is installed in the through hole, and the first reflector 31 is a concave reflector. A buffer pressure piece 32 is arranged on the side of the first reflector 31 close to the main body 1, and a first reflector pressure piece 33 and a second fixing piece 34 are arranged on the side of the first reflector 31 away from the main body 1 in sequence, and the buffer pressure piece 32 and the first reflector pressure piece 33 are both made of high temperature resistant materials, and the second fixing piece 34 is made of metal.

[0038] During installation, the second fixing member 34 is fixed to the side wall of the second mounting base 3 away from the main body 1 by means of fastening screws. The second fixing member 34 will press the first reflector pressing member 33 during the fastening process, and push the first reflector 31 through the first reflector pressing member 33 until the first reflector 31 is pressed against the buffer pressing member 32, so that the buffer pressing member 32 and the first reflector pressing member 33 clamp and fix the first reflector 31 from both sides.

[0039] Reference Figure 1 The first mounting seat 2 is also embedded with a second reflector 24 between the two collimating mirrors 21. The second reflector 24 is a plane reflector. The second reflector 24 is close to the main body 1 and is sequentially provided with two corresponding second reflector pressing pieces 25 and third fixing pieces 26. The second reflector pressing pieces 25 are also made of high temperature resistant material, and the third fixing pieces 26 are made of metal.

[0040] During installation, the second reflector pressing piece 25 is spaced apart at the upper and lower sides of the second reflector 24, and the third fixing piece 26 corresponds to the position of the second reflector pressing piece 25. The third fixing piece 26 presses the second reflector pressing piece 25, thereby pressing and fixing the second reflector 24 in the first mounting seat 2. An interference fit is adopted between the second reflector pressing piece 25 and the third fixing piece 26. Specifically, the interference fit can be that the thickness of the second reflector pressing piece 25 is greater than the spacing between the third fixing piece 26 and the second reflector 24, so that the third fixing piece 26 squeezes and deforms the second reflector pressing piece 25 during the tightening process, thereby achieving the functions of fixing the second reflector 24 and sealing.

[0041] The first mounting seat 2 is provided with a light inlet and a light outlet at positions corresponding to the two collimating mirrors 21. The ultraviolet light is injected into the reflection cavity 11 of the main body 1 from one of the collimating mirrors 21 through an optical fiber, and after multiple reflections by the first reflector 31 and then the second reflector 24, it is emitted from the other collimating mirror 21 to the main body 1. The collimating mirror 21 and each reflector are made of high temperature resistant materials. Each mounting seat and each fixing member clamp the collimating mirror 21 or the first reflector 31 from both sides in a glue-free fixing manner, and each lens is stably fixed at the two ends of the main body 1, so that there is no need to apply epoxy resin or other compounds to the lens to fix it, which solves the influence of aging and volatilization of the lens bonding glue under high temperature and strong ultraviolet conditions on the instrument detection signal. At the same time, the sealing pressing piece 23 and the first fixing piece 22 are interference fit, and the second reflector pressing piece 25 and the third fixing piece 26 are interference fit, which further improves the stability and sealing of the fixing of the collimating mirror 21 and the second reflector 24, so that the metal does not contact the lens, and effectively avoids the lens from being broken due to collision.

[0042] Further, refer to Figure 2 The main body 1 is covered with a heating unit, and the heating unit includes two heating plates 4 that cover the main body 1 from the upper and lower sides respectively. The inside of the heating plate 4 can be heated by a cast aluminum heating block or a mica heating sheet to ensure a stable heating process and high heating efficiency, and the main body 1 can be quickly heated.

[0043] The heating unit is also covered with an insulation unit, which includes two insulation plates 5 covering the heating plate 4 from the upper and lower sides respectively. The insulation plates 5 can be made of aluminum silicate in an integrated manner to insulate the heating unit. The insulation plates 5 are externally provided with metal sheet metal parts to prevent the insulation plates 5 from falling off due to collision.

[0044] A detection sensor 14 is fixed to the side wall of the main body 1. The detection sensor 14 can be a zirconia sensor. The detection sensor 14 is covered by the heating plate 4. The probe of the detection sensor 14 is inserted into the reflection cavity 11, which can accurately measure the oxygen content and water content of the high-temperature gas in the gas pool.

[0045] The implementation principle of a high-temperature gas pool in Example 1 of the utility model is as follows: the collimating mirror 21 is fixed by clamping the first mounting seat 2, the sealing pressure piece 23 and the first fixing piece 22 together, the first reflecting mirror 31 is fixed by clamping the buffer pressure piece 32, the first reflecting mirror pressure piece 33 and the second fixing piece 34 together, and the second reflecting mirror 24 is fixed by clamping the first mounting seat 2, the second reflecting mirror pressure piece 25 and the third fixing piece 26 together, so that all lenses in the high-temperature gas pool 10 are fixed in a glue-free fixing manner, which effectively avoids the situation where the lenses are contaminated by the volatilization of glue.

[0046] Embodiment 2:

[0047] Embodiment 2 of the present invention provides a flue gas analyzer, referring to Figure 3 , including the above-mentioned high-temperature gas pool 10, and a chassis 6. The outer shape and installation dimensions of the chassis 6 are designed using a standard 4U chassis 6 design to facilitate system integration. The internal space of the chassis 6 is divided into a mutually independent high-temperature zone 61 and a normal temperature zone 62 by a thermal insulation board, wherein the high-temperature gas pool 10 is located as a whole in the high-temperature zone 61.

[0048] A light source unit 63 and a spectrometer unit 64 are fixed in the normal temperature zone 62 of the chassis 6, wherein the light source unit 63 can be a xenon lamp light source or a deuterium lamp light source, which can generate stable ultraviolet light; the spectrometer unit 64 can be an ultraviolet spectrometer, and the light source unit 63 and the spectrometer unit 64 are each connected to the high temperature gas pool 10 through a high temperature optical fiber 7, and the high temperature optical fiber 7 is a special high temperature resistant optical fiber 7. The light source unit 63 uses the high temperature optical fiber 7 to conduct ultraviolet light into the main body 1, and the ultraviolet light enters the main body 1 after collimation coupling. After multiple reflections, the ultraviolet light is emitted from the light outlet, and enters another high temperature optical fiber 7 through collimation coupling, and finally reaches the spectrometer unit 64 for analysis.

[0049] Placing the light source unit 63 and the spectrometer unit 64 in the normal temperature zone 62 can prevent the ultraviolet light source from being affected by high temperature, which would shorten the life of the light source, and improve the accuracy of long-term detection.

[0050] In order to ensure the performance of each instrument, a cooling fan 8 and a heating fan 9 are installed on the side wall of the chassis 6 corresponding to the normal temperature zone 62, and a temperature sensor (not shown) is also provided in the chassis 6 for real-time monitoring of the internal temperature of the chassis 6. When it is detected that the temperature in the chassis 6 is lower than a certain fixed set temperature, the heating fan 9 is turned on for heating; when the temperature in the chassis 6 is higher than a certain fixed set temperature, the cooling fan 8 is turned on, so that the chassis 6 maintains a certain constant temperature, is relatively stable, and has a small fluctuation state, so as to avoid the instrument performance being affected by the external environment temperature and ensure the performance of the instrument.

[0051] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed by the utility model.

[0052] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature gas pool, characterized in that: include A main body (1), wherein a reflective cavity (11) is provided in the main body (1); A first mounting seat (2) is arranged at one end of the main body (1); two collimating lenses (21) are embedded in the first mounting seat (2) on a side facing the main body (1); a first fixing member (22) is arranged on a side of the collimating lenses (21) close to the main body (1); the first fixing member (22) is fixedly connected to the first mounting seat (2) and presses the collimating lenses (21); A second mounting seat (3) is located at an end of the main body (1) away from the first mounting seat (2); a first reflector (31) is embedded in the second mounting seat (3); a buffer pressure piece (32) and a second fixing piece (34) are respectively provided on both sides of the first reflector (31) to clamp the first reflector (31); and the second fixing piece (34) is fixedly connected to the second mounting seat (3); The ultraviolet light enters the main body (1) from one of the collimating mirrors (21), is reflected by the first reflecting mirror (31), and then exits the main body (1) from the other collimating mirror (21).

2. The high temperature gas pool according to claim 1, characterized in that: A sealing pressing piece (23) is provided between the collimating mirror (21) and the first fixing piece (22); the sealing pressing piece (23) and the first fixing piece (22) are interference-fitted, and the first fixing piece (22) presses the collimating mirror (21) through the sealing pressing piece (23).

3. The high temperature gas pool according to claim 1, characterized in that: A first reflector pressing piece (33) is provided between the first reflector (31) and the second fixing piece (34), and the second fixing piece (34) presses the collimating mirror (21) via the first reflector pressing piece (33).

4. The high temperature gas pool according to claim 1, characterized in that: The first mounting seat (2) is provided with a second reflector (24) embedded between the two collimating mirrors (21); the second reflector (24) is provided with two corresponding second reflector pressing pieces (25) and third fixing pieces (26) in sequence on a side close to the main body (1); the third fixing piece (26) is fixedly connected to the first mounting seat (2); the second reflector pressing pieces (25) are distributed at the upper and lower ends of the second reflector (24) and are interference-fitted with the third fixing piece (26); the third fixing piece (26) presses the second reflector (24) through the second reflector pressing piece (25).

5. The high temperature gas pool according to claim 1, characterized in that: The main body (1) is coated with a heating unit, and the heating unit comprises two heating plates (4) which respectively coat the main body (1) from upper and lower sides, and are used to heat the smoke in the main body (1).

6. The high temperature gas pool according to claim 5, characterized in that: The heating unit is coated with a heat-insulating unit, and the heat-insulating unit comprises two heat-insulating plates (5) respectively covering the heating plate (4) from upper and lower sides, and is used to isolate the heat of the heating plate (4).

7. The high temperature gas pool according to claim 5, characterized in that: A detection sensor (14) is provided on the side wall of the main body (1), wherein the detection sensor (14) is covered by the heating plate (4), and a probe of the detection sensor (14) is inserted into the reflection cavity (11) for real-time measurement of the oxygen content and water content of the internal high-temperature gas.

8. The high temperature gas pool according to claim 5, characterized in that: An air inlet (12) is provided on a side wall of the main body (1) close to one end of the second mounting seat (3), and a filter unit (13) is provided on the side wall of the main body (1) corresponding to the air inlet (12) for filtering the intake air.

9. A flue gas analyzer, characterized in that: It comprises a high-temperature gas pool as claimed in claims 1 to 8, and a chassis (6), wherein the internal space of the chassis (6) is divided into a high-temperature zone (61) and a normal temperature zone (62) which are independent of each other, and the main body (1) is located in the high-temperature zone (61).

10. The flue gas analyzer according to claim 9, characterized in that: A light source unit (63) and a spectrometer unit (64) are arranged in the normal temperature zone (62) of the chassis (6); the light source unit (63) guides ultraviolet light into the main body (1) via optical fibers, and the spectrometer unit (64) receives light reflected from the main body (1) via optical fibers.

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