A high and low temperature gas mixer

Abstract

A high-low temperature gas mixer includes: a hot air distributor, which is a long cylindrical structure with uniformly distributed distribution holes in the lower section; hot air is input from the top end of the hot air distributor and output from the bottom end; a mixing chamber, with a process gas inlet at the bottom and an inverted L-shaped mixed process gas outlet at the top; the bottom end of the hot air distributor is inserted into the mixing chamber from the top of the mixed process gas outlet; square hollow steel sections are arranged at equal intervals on the bottom surface of the mixing chamber; a distribution brick layer is located at the bottom of the mixing chamber and is formed by vertically contacting the distribution bricks; the distribution bricks are vertically placed on the square hollow steel sections, and strip-shaped notches are provided on both sides of the bottom of the distribution bricks, which are in close contact with the upper end and side of two adjacent square hollow steel sections to achieve stable support; the distribution bricks have vertical honeycomb-shaped square channels inside to promote uniform gas distribution.

Description

Technical Field

[0001] This invention belongs to the field of high and low temperature gas mixing technology, specifically relating to a mixer that effectively achieves uniform mixing of high and low temperature gases. Background Technology

[0002] In industrial applications, there is often a need to mix high- and low-temperature gases to meet specific process requirements. Existing mixing methods typically employ a three-way connector. This method often results in uneven mixing of the high-temperature and low-temperature gases, affecting not only the overall temperature and composition consistency of the mixture but also directly reducing the production efficiency and product quality of subsequent processes. The root cause of this uneven mixing problem lies in the simple design of the three-way connector, which lacks an effective mixing mechanism to promote sufficient exchange and fusion between the gases.

[0003] The waste sulfuric acid regeneration process involves a step of thoroughly mixing low-temperature acidic process gas with high-temperature air to increase oxygen content and process gas temperature. Traditional three-way mixing methods struggle to achieve rapid and uniform mixing when dealing with these two gases with significantly different properties. This not only affects the efficiency of waste sulfuric acid regeneration but can also lead to a series of problems such as accelerated equipment corrosion, increased energy consumption, and unstable quality of the regenerated product due to uneven mixing.

[0004] Therefore, existing high and low temperature gas mixing technologies, especially in the application of waste sulfuric acid regeneration processes, have obvious drawbacks such as uneven mixing and low efficiency. There is an urgent need for a more advanced and efficient mixing solution to solve these problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a high-low temperature gas mixer that utilizes a hot air distributor and distribution bricks to disperse hot air and low-temperature process gas, enabling them to mix rapidly and evenly within the mixing chamber, thereby increasing the oxygen content and temperature of the process gas.

[0006] The technical solution of this utility model is as follows:

[0007] A high-low temperature gas mixer, characterized in that it includes:

[0008] The hot air distributor has a long cylindrical structure with evenly distributed distribution holes in the lower section. Hot air enters from the top and exits from the bottom.

[0009] The mixing chamber has a process gas inlet at the bottom and an inverted L-shaped mixed process gas outlet at the top.

[0010] The bottom end of the hot air distributor is inserted into the mixing chamber from the top of the mixed process gas outlet;

[0011] Square hollow steel sections are arranged at equal intervals on the bottom surface of the mixing chamber.

[0012] The distribution brick layer, located at the bottom of the mixing chamber, is formed by vertically contacting the distribution bricks. The distribution bricks are placed vertically on the square hollow steel sections, and strip-shaped notches are provided on both sides of the bottom of the distribution bricks. These strip-shaped notches are close to the upper end and side of the two adjacent square hollow steel sections to achieve stable support. The distribution bricks have vertical honeycomb-shaped square channels inside to promote uniform gas distribution.

[0013] Preferably, the bottom of the hot air distributor is located in the middle or upper part of the mixing chamber, the ratio of the length of the hot air distributor entering the mixing chamber to the height of the mixing chamber is (350-950):1540, the ratio of the distribution hole to the diameter of the hot air distributor is (60-160):600, and the number of distribution holes is 10-40.

[0014] Preferably, a layer of support bricks is disposed in close contact with the shell in the mixing chamber. The support bricks are formed by a staggered arrangement of several slotted support bricks. The support bricks have honeycomb-shaped square channels inside to enhance structural strength and gas flow. The inner wall of the mixing chamber shell is coated with a PFA liner, and a PTFE gasket is placed between the PFA liner and the support bricks to enhance sealing.

[0015] Preferably, the two end connecting surfaces of the support brick are provided with end face positioning grooves, and the lower connecting surfaces of the vertically arranged support bricks are provided with transverse through strip grooves. Within the same horizontal layer, the support bricks are arranged horizontally end to end, and the end face positioning grooves on the two end connecting surfaces are aligned to form positioning slots, in which the lower half of a circular fixing piece is placed.

[0016] Preferably, the through-strip groove of the upper layer support brick accommodates the upper half of the circular fixing piece, so that the positions of the upper and lower layer support bricks in the direction perpendicular to the circular fixing piece are fixed. The sum of the depths of the end face positioning groove and the through-strip groove is greater than the diameter of the circular fixing piece, so that the connecting surfaces of the upper and lower layer support bricks are in close contact. The circular fixing piece is a ceramic fixing piece.

[0017] Preferably, the supporting brick layer extends to the top of the mixing chamber, and an L-shaped fixing plate is provided on the top of the supporting brick layer. The front end of the fixing plate is bent downward to fasten the supporting brick layer, and the horizontal part extends and is fixed to the top of the mixing chamber or the side wall of the mixing chamber.

[0018] Preferably, the square hollow steel section is wrapped with a PFA liner, and a PTFE gasket is placed between the square hollow steel section and the distribution brick.

[0019] Preferably, the ratio of the height of the distribution brick layer to the height of the mixing chamber is (150-450):1540.

[0020] The ratio of the cross-sectional area of ​​the distribution brick to the cross-sectional area of ​​the distribution brick layer is (80-220):1225.

[0021] Preferably, the ratio of the cross-sectional area of ​​the process gas inlet to the cross-sectional area of ​​the distribution brick layer is (0.9-2.7):5.

[0022] Preferably, the ratio of the process gas inlet diameter to the hot air distributor diameter is (0.6-1.6):1.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The high and low temperature gas mixer provided by this utility model enables hot air and low temperature process gas to form a convective mixture. At the same time, the design of the distribution brick layer and the hot air distributor disperses the mixture in the direction of travel, which can improve the mixing speed and the uniformity of the mixture.

[0025] (2) The high and low temperature gas mixer provided by this utility model is designed to support the brick layer. It uses the end face positioning groove and the through strip groove to accommodate the circular fixing plate. The structure is used to fix the supporting brick layer, which effectively insulates heat.

[0026] (3) High and low temperature gas mixers have the advantages of good mixing effect, high mechanical strength, good flow state, strong corrosion resistance, good temperature tolerance, low manufacturing cost, easy disassembly and maintenance and wide application range. Attached Figure Description

[0027] Figure 1 This figure shows an axial sectional view of a mixer according to the present invention;

[0028] Figure 2 The diagram shows a schematic of a supporting brick structure according to the present invention; wherein a is a schematic diagram of the supporting brick structure at one angle, and b is a schematic diagram of the supporting brick structure at another angle.

[0029] Figure 3 This diagram illustrates the arrangement of supporting bricks and the function of the circular fixing piece in this invention.

[0030] Figure 4 This diagram shows a schematic of a distribution brick structure according to the present invention;

[0031] Figure 5 This diagram shows a structural schematic of a fixing plate and a supporting brick layer in this utility model.

[0032] Explanation of icon numbers

[0033] 401 - Hot air distributor;

[0034] 4011 - Dispensing hole;

[0035] 402 - Mixing Chamber;

[0036] 4021 - Supporting brick layer;

[0037] 211 - End face positioning groove;

[0038] 212-Through-through strip groove;

[0039] 213 - Circular fixing plate;

[0040] 214 - Fixing plate;

[0041] 4022 - Distribute brick layers;

[0042] 221 - Square hollow steel section;

[0043] 222 - Strip notch;

[0044] 403 - Process gas inlet;

[0045] 404 - Mixed gas process gas outlet. Detailed Implementation

[0046] The present invention will be described in detail below through specific embodiments, and the features and advantages of the present invention will become clearer and more explicit with these descriptions.

[0047] The high and low temperature gas mixer provided by this utility model includes a hot air distributor 401, a mixing chamber 402, a process gas inlet 403, and a mixed gas process gas outlet 404.

[0048] The mixing chamber 402 has a process gas inlet 403 at the bottom and a mixed process gas outlet 404 at the top. The bottom end of the mixed process gas outlet 404 is connected to the top of the mixing chamber 402, and it is a side outlet in an inverted L-shape, as shown in the figure below. Figure 1 As shown.

[0049] The hot air distributor 401 is a long cylindrical shape, inserted from the top of the mixed process gas outlet 404. Hot air enters from the top of the hot air distributor 401, and the bottom is the outlet. The bottom of the hot air distributor 401 is located in the middle or upper region of the mixing chamber 402. Preferably, the lower section of the hot air distributor 401 is provided with uniformly distributed distribution holes 4011, so that part of the hot air entering from the top of the hot air distributor 401 mixes countercurrently with the low-temperature acidic process gas through the bottom outlet of the long cylinder of the hot air distributor 401, and the other part of the air is ejected through the distribution holes 4011 and fully mixed with the mixed gas coming out of the mixing chamber 402 before entering the mixed process gas outlet 404 and leaving the mixer.

[0050] The diameter ratio of the distribution hole 4011 to the hot air distributor 401 is (60-160):600, preferably (70-140):600, more preferably (80-120):600, and the number of distribution holes 4011 is 10-40, preferably 16-24. The size and number of distribution holes 4011 can be adjusted according to the actual air volume. A suitable diameter ratio of the distribution hole 4011 to the hot air distributor 401 allows air to be ejected from the side distribution holes while maintaining a suitable flow rate and pressure of the air at the bottom outlet of the air distributor, ensuring the effect of counter-current mixing and lateral mixing.

[0051] Preferably, the ratio of the length of the hot air distributor 401 entering the mixing chamber 402 to the height of the mixing chamber 402 is (350-950):1540, more preferably (450-850):1540, and even more preferably (550-750):1540.

[0052] Preferably, the hot air temperature is 200~800℃, more preferably 300~600℃, and the temperature of the low-temperature acidic process gas is 0~100℃, more preferably 0~80℃.

[0053] In the mixing chamber 402, a support brick layer 4021 is disposed close to the shell. This layer is formed by a plurality of slotted support bricks arranged in a staggered manner. The support bricks have honeycomb-shaped square channels inside, serving as a sidewall insulation layer. Preferably, the inner wall of the mixing chamber 402 shell is lined with PFA (tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer), and a PTFE (polytetrafluoroethylene) gasket is disposed close to the PFA liner to prevent corrosion from acidic gases.

[0054] The two end connecting surfaces of the supporting brick are provided with end face positioning grooves 211, and the lower connecting surfaces of the vertically arranged supporting bricks are provided with through strip grooves 212 that penetrate the lower connecting surfaces of the supporting bricks laterally, as shown in the figure. Figure 2 and Figure 3 As shown.

[0055] Within the same horizontal layer, the support bricks are arranged horizontally end-to-end, with the end face positioning grooves 211 on the connecting surfaces aligned to form positioning slots, where the lower half of a circular fixing piece 213 is placed. The through-slot 212 of the upper layer support brick accommodates the upper half of the circular fixing piece 213, thus fixing the positions of the upper and lower layer support bricks in the direction perpendicular to the circular fixing piece 213, as detailed below. Figure 3 As shown. The total depth of the end face positioning groove 211 and the through strip groove 212 is greater than the diameter of the circular fixing piece 213, so that the connecting surfaces of the upper and lower supporting bricks are in close contact. The circular fixing piece 213 is a ceramic fixing piece.

[0056] The supporting brick layer 4021 extends to the top of the mixing chamber. An L-shaped fixing plate 214 is installed on top of the supporting brick layer 4021. The front bent portion of the fixing plate 214 snaps downwards to secure the supporting brick layer 4021, while the horizontal portion extends and is fixed to the top or side wall of the mixing chamber 402, thus firmly fixing the supporting brick layer 4021 to the side wall of the mixing chamber 402. Specifically, as shown... Figure 5 As shown.

[0057] The bottom of the mixing chamber 402 is provided with a layer of distributing bricks 4022, which is formed by vertically contacting distributing bricks. The distributing bricks have vertically honeycomb-shaped square channels inside. The bottom surface of the mixing chamber 402 is provided with equally spaced square hollow steel sections 221. Strip-shaped notches 222 are provided on both sides of the bottom of the distributing section. The distributing bricks are placed vertically on the square hollow steel sections 221. The strip-shaped notches 222 on the distributing section are in close contact with the upper end and side surfaces of two adjacent square hollow steel sections 221, specifically as follows... Figure 1 and Figure 4 As shown. Preferably, the square hollow steel section 221 is wrapped with a PFA liner, and a PTFE gasket is placed between the square hollow steel section 221 and the distribution brick. The center-to-center distance between any two square hollow steel sections 221 is based on the width of the distribution brick in the direction of the two square hollow steel sections 221, specifically as shown in the figure. Figure 1 As shown.

[0058] The ratio of the height of the distribution brick layer 4022 to the height of the mixing chamber 402 is (150-450):1540, preferably (200-400):1540, and more preferably (250-350):1540.

[0059] The ratio of the cross-sectional area of ​​the distribution brick to the cross-sectional area of ​​the distribution brick layer 4022 is (80-220):1225, preferably (100-200):1225, and more preferably (120-180):1225.

[0060] The process gas inlet 403 is connected to the bottom of the mixing chamber 402. After the process gas enters the mixing chamber 402 through the process gas inlet 403, it is dispersed by the distribution brick layer 4022. Inside the mixing chamber 402, it is fully mixed with the hot air entering through the hot air distributor 401, and then discharged through the process gas outlet 404 on the side. The process gas inlet 403 is lined with a PFA layer to prevent corrosion from acidic gases.

[0061] In this invention, the low-temperature acidic process gas and hot air entering from the bottom process gas inlet 403 are dispersed and rapidly mixed by the distribution brick layer 4022 and the hot air distributor 401 to obtain a uniformly mixed gas.

[0062] The ratio of the cross-sectional area of ​​the process gas inlet 403 to the cross-sectional area of ​​the distribution brick layer 4022 is (0.9-2.7):5, preferably (1.1-2.3):5, and more preferably (1.3-1.9):5.

[0063] The diameter ratio of the process air inlet 403 to the hot air distributor 401 is (0.6-1.6):1, preferably (0.7-1.4):1, and more preferably (0.8-1.2):1.

[0064] Preferably, the process gas inlet 403 is provided with a pressure sensor monitoring port and / or a temperature monitoring port, which are used to house the pressure sensor and the temperature sensor, respectively.

[0065] The high and low temperature gas mixer provided in this utility model achieves rapid dispersion and mixing of hot air and low temperature acidic process gas through the rational design of the hot air distributor 401 and the mixing chamber 402. This achieves the purpose of rapidly increasing and adjusting the temperature and oxygen content of the process gas, and the mixing is rapid and uniform, ensuring the smooth progress of subsequent processes.

[0066] The present invention has been described in detail above with reference to specific embodiments and / or exemplary examples and the accompanying drawings. However, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the present invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A high-low temperature gas mixer, characterized in that, include: The hot air distributor (401) has a long cylindrical structure with evenly distributed distribution holes (4011) in the lower section. Hot air enters from the top of the hot air distributor (401) and exits from the bottom. The mixing chamber (402) has a process gas inlet (403) at the bottom and an inverted L-shaped mixed process gas outlet (404) at the top. The bottom end of the hot air distributor (401) is inserted into the mixing chamber (402) from the top of the mixed process gas outlet (404); Square hollow steel sections (221) are arranged at equal intervals on the bottom surface of the mixing chamber (402). The distribution brick layer (4022) is located at the bottom of the mixing chamber (402) and is formed by vertically contacting the distribution bricks. The distribution bricks are vertically placed on the square hollow steel section (221), and strip-shaped notches (222) are provided on both sides of the bottom of the distribution bricks. The strip-shaped notches (222) are close to the upper end face and side face of the two adjacent square hollow steel sections (221) to achieve stable support. The distribution bricks have vertical honeycomb-shaped square channels inside to promote uniform gas distribution.

2. The high and low temperature gas mixer according to claim 1, characterized in that, The bottom of the hot air distributor (401) is located in the middle or upper part of the mixing chamber (402). The ratio of the length of the hot air distributor (401) entering the mixing chamber (402) to the height of the mixing chamber (402) is (350-950):1540. The ratio of the diameter of the distribution hole (4011) to the diameter of the hot air distributor (401) is (60-160):

600. The number of distribution holes (4011) is 10-40.

3. The high and low temperature gas mixer according to claim 1, characterized in that, The mixing chamber (402) is fitted with a support brick layer (4021) in close contact with the shell. It is formed by several slotted support bricks arranged in a staggered manner. The support bricks have honeycomb-shaped square channels inside to enhance structural strength and gas flow. The inner wall of the mixing chamber (402) shell is coated with a PFA liner, and a PTFE gasket is placed between the PFA liner and the support bricks to enhance sealing.

4. The high and low temperature gas mixer according to claim 3, characterized in that, The two ends of the supporting brick are provided with end face positioning grooves (211), and the lower connecting surfaces of the vertically arranged supporting bricks are provided with transverse through strip grooves (212). In the same horizontal layer, the supporting bricks are arranged horizontally connected head to tail, and the end face positioning grooves (211) on the two end connecting surfaces are aligned to form positioning slots, and the lower half of the circular fixing piece (213) is placed inside.

5. The high and low temperature gas mixer according to claim 4, characterized in that, The through-strip groove (212) of the upper layer of support brick accommodates the upper half of the circular fixing piece (213), so that the positions of the upper and lower layer support bricks in the direction perpendicular to the circular fixing piece (213) are fixed. The total depth of the end face positioning groove (211) and the through-strip groove (212) is greater than the diameter of the circular fixing piece (213), so that the connecting surfaces of the upper and lower layer support bricks are in close contact. The circular fixing piece (213) is a ceramic fixing piece.

6. The high and low temperature gas mixer according to claim 3, characterized in that, The supporting brick layer (4021) extends to the top of the mixing chamber. An L-shaped fixing plate (214) is provided on the top of the supporting brick layer (4021). The front end of the fixing plate (214) is bent downward to fasten the supporting brick layer (4021), and the horizontal part extends and is fixed to the top of the mixing chamber (402) or the side wall of the mixing chamber (402).

7. The high and low temperature gas mixer according to claim 1, characterized in that, The square hollow steel section (221) is wrapped with a PFA liner, and a PTFE gasket is placed between the square hollow steel section (221) and the distribution brick.

8. The high and low temperature gas mixer according to claim 1, characterized in that, The ratio of the height of the distribution brick layer (4022) to the height of the mixing chamber (402) is (150-450):1540. The ratio of the cross-sectional area of ​​the distribution brick to the cross-sectional area of ​​the distribution brick layer (4022) is (80-220):1225.

9. The high and low temperature gas mixer according to claim 1, characterized in that, The ratio of the cross-sectional area of ​​the process gas inlet (403) to the cross-sectional area of ​​the distribution brick layer (4022) is (0.9-2.7):

5.

10. The high and low temperature gas mixer according to claim 1, characterized in that, The diameter ratio of the process gas inlet (403) to the diameter of the hot air distributor (401) is (0.6-1.6):1.

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