An energy-saving tunnel kiln structure for waste gas purification

Abstract

The present invention discloses a tunnel kiln structure for energy-saving waste gas purification and treatment, and relates to the technical field of tunnel kiln waste gas purification. When the tunnel kiln is firing objects, the waste gas in the tunnel kiln mainly includes particulate matter, sulfur dioxide, and nitrogen oxides. If such waste gas cannot be reasonably collected and directly discharged into the air during treatment, it will have a certain impact on the environment. The present invention installs desulfurization and denitrification equipment in the tunnel kiln to purify the waste gas and degrade the pollutants in the waste gas, and integrates the waste gas purification with the tunnel kiln. In order to realize the reasonable utilization of thermal energy, the heat overflowing from the inner kiln wall is collected by a hot air furnace, and the collected heat is converted into hot air. The hot air is blown into the interior of the drying bin through a hot air pipe, and the purification belt is dried by the hot air. In this way, the purification quality of the purification belt for the waste gas can be better ensured, and the heat can be better utilized in the purification work.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel kiln waste gas purification, in particular to an energy-saving tunnel kiln structure for waste gas purification. Background Art

[0002] Tunnel kiln is a continuously operating heat treatment equipment, which is widely used in the production process of ceramics, refractory materials, bricks and tiles, etc. Tunnel kiln exhaust gas purification is an important environmental protection and production safety issue, because these exhaust gases may contain dust, harmful gases and other pollutants.

[0003] In this regard, the patent document with publication number CN112843955A discloses a tunnel kiln waste gas purification treatment system, including a bottom plate, a gas treatment device and an air inlet pipe, wherein the gas treatment device is installed in the middle of the upper end of the bottom plate, the gas treatment device is in a cylindrical structure, and an air inlet is arranged at the lower left end of the gas treatment device, and the air inlet pipe is installed on the air inlet. The present invention can solve the problems that the existing equipment is usually unable to effectively remove large particle impurities inside the waste gas when treating the waste gas from the tunnel kiln, and the impurities are easy to clog the mesh of the filter, affecting the filtering efficiency of the filter, and the existing equipment is usually unable to effectively remove harmful substances in the waste gas when purifying the waste gas from the tunnel kiln, and the liquid sprayed during purification is easy to flow into the filter, resulting in the phenomenon of the filter bag being easily stuck.

[0004] In this regard, the patent document with publication number CN209034110U discloses a tunnel kiln exhaust gas purification treatment system and a tunnel kiln, which relates to the field of exhaust gas purification treatment technology. The tunnel kiln exhaust gas purification treatment system includes an active reaction section, which includes at least one reaction module, and the reaction module includes at least one adsorption layer, which is a mixed layer of an active adsorbent and a catalyst. Through the arrangement of the above-mentioned adsorption layer and the reaction module, the active reaction section can purify atmospheric pollutants such as sulfur oxides, nitrogen oxides and solid particulate matter carried in the tunnel kiln exhaust gas, which can effectively improve the problem of excessive exhaust gas emissions from traditional tunnel kilns, thereby causing pollution to the atmosphere; the tunnel kiln exhaust gas purification treatment system is suitable for most large, medium and small tunnel kilns. The utility model also provides a tunnel kiln, including the above-mentioned tunnel kiln exhaust gas purification treatment system.

[0005] Nowadays, when tunnel kilns are firing objects, the exhaust gas in the tunnel kiln mainly includes particulate matter, sulfur dioxide, and nitrogen oxides. If this type of exhaust gas cannot be collected reasonably and is directly discharged into the air, it will have a certain impact on the environment and have a certain impact on the environment and people's health.

[0006] In view of the above problems, an energy-saving tunnel kiln structure for exhaust gas purification is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide an energy-saving exhaust gas purification tunnel kiln structure, which solves the problem of rational treatment of polluted exhaust gas in the tunnel kiln in the background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an energy-saving tunnel kiln structure for exhaust gas purification, comprising a kiln bottom, the top of the kiln bottom is connected to a tunnel kiln wall, the interior of the tunnel kiln wall is embedded with an inner kiln wall, the interior of the inner kiln wall is embedded with a feed table, the interior of the inner kiln wall is provided with a partitioning component, the partitioning component comprises a partitioning frame, the interior of the inner kiln wall is provided with a partitioning frame, the interior of the partitioning frame is embedded with a partitioning plate, the top of the partitioning plate is provided with a traction rod, the top of the tunnel kiln wall is connected with a hydraulic telescopic rod, and the output end of the hydraulic telescopic rod is connected to the traction rod;

[0009] An exhaust gas outlet is embedded in the top of the tunnel kiln wall, a guide block is embedded in the exhaust gas outlet, both side walls of the guide block are set in an arc shape, the bottom width of the guide block is small and the top width is large, and a sealing cover is also embedded in the exhaust gas outlet, the sealing cover is movably connected to the exhaust gas outlet, and the exhaust gas outlet is mounted on the upper surface of the guide block when it is closed;

[0010] A waste gas treatment component is provided at the top of the tunnel kiln wall, and the waste gas treatment component includes a waste gas treatment chamber, a blower is installed on the waste gas treatment chamber, a spray chamber is connected to one side surface of the waste gas treatment chamber, and a drying chamber is connected to the other side of the waste gas treatment chamber, the spray chamber and the drying chamber correspond to each other, a hot air duct is provided at the bottom end of the drying chamber, a hot air furnace is installed on the outer surface of the inner kiln wall, the hot air furnace and the hot air duct are connected, the top end of the hot air duct is embedded in the interior of the drying chamber, a spray pipe is provided at the top of the spray chamber, and an area dividing plate is embedded in the interior of the waste gas treatment chamber.

[0011] Preferably, the area dividing plate divides the interior of the exhaust gas treatment bin into two parts, the upper and lower parts, and the blowers are provided in two groups, one group delivers flowing air to the upper part of the exhaust gas treatment bin, and the other group delivers flowing air to the lower part of the exhaust gas treatment bin.

[0012] Preferably, a purification component is provided at the bottom end of the waste gas treatment bin, the purification component includes an air inlet, the waste gas outlet is embedded in the air inlet, and the waste gas inside the inner kiln wall flows to the interior of the waste gas treatment bin through the waste gas outlet and the air inlet.

[0013] Preferably, a filter plate is provided in the lower part of the exhaust gas treatment chamber. The filter plates are divided into two groups, and the apertures opened on the surfaces thereof are different in size. The filter plates are used to filter impurities in the exhaust gas.

[0014] Preferably, a driving shaft is embedded in the spray chamber, a driven shaft is embedded in the drying chamber, a purification belt is sleeved on the surface of the driving shaft and the outer surface of the driven shaft, and the purification belt connects the driving shaft and the driven shaft.

[0015] Preferably, the purification belt spans across the lower half of the exhaust gas treatment chamber, and the drive shaft is connected to a drive motor, and the drive motor drives the drive shaft to rotate, thereby synchronously driving the purification belt and the driven shaft to rotate.

[0016] Preferably, the surface of the purification belt is paved with activated carbon particles, wherein the activated carbon particles are distributed in a honeycomb shape on the outer surface of the purification belt, and the purification belt is used to absorb sulfur and nitrate in the exhaust gas.

[0017] Preferably, the length of the area dividing plate is only three quarters of the length of the internal space of the exhaust gas treatment bin, and the upper space and the lower space of the exhaust gas treatment bin are interconnected.

[0018] Preferably, the inner wall of the spray chamber is provided with a brush for cleaning impurities in the exhaust gas, the brush is wrapped around the surface of the purification belt, and the driving shaft rotates to drive the purification belt to rub against the brush.

[0019] Preferably, the partition plate penetrates through the interior of the inner kiln wall and is embedded in the interior of the tunnel kiln wall. The inner kiln wall and the partition plate are slidably connected, and the partition frame is used to limit the sliding track of the partition plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides an energy-saving tunnel kiln structure for exhaust gas purification, which installs desulfurization and denitrification equipment in the tunnel kiln to purify exhaust gas and degrade pollutants in the exhaust gas, thereby integrating exhaust gas purification with the tunnel kiln. In order to achieve the rational use of thermal energy, the heat overflowing from the inner kiln wall is collected by a hot air furnace, which is converted into hot air after collection. The hot air is blown into the interior of the drying bin through a hot air pipe, and the purification belt is dried by the hot air. In this way, the purification quality of the purification belt for exhaust gas can be better ensured, and the heat can be better utilized in the purification work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a side view structural schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the traction rod and the exhaust gas outlet of the present invention;

[0025] Figure 4It is a schematic diagram of the structure of the exhaust gas outlet and the traction rod of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the guide block and the sealing cover of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the spraying bin and the drying bin of the present invention;

[0028] Figure 7 It is a schematic cross-sectional structure diagram of the waste gas treatment chamber of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the purification belt and the driving shaft of the present invention.

[0030] In the figure: 11, kiln bottom; 12, tunnel kiln wall; 13, feeding platform; 14, inner kiln wall; 2, partition assembly; 21, partition frame; 22, partition plate; 23, hydraulic telescopic rod; 24, traction rod; 25, exhaust gas outlet; 26, guide block; 27, sealing cover; 3, exhaust gas treatment assembly; 31, exhaust gas treatment chamber; 32, blower; 33, spray chamber; 34, drying chamber; 35, hot air pipe; 36, spray pipe; 37, hot air furnace; 38, area dividing plate; 4, purification assembly; 41, air inlet; 42, filter plate; 43, drive shaft; 44, purification belt; 45, driven shaft. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0033] Combination Figure 1-Figure 8 The present invention provides an energy-saving tunnel kiln structure for exhaust gas purification, comprising a kiln bottom 11, a tunnel kiln wall 12 connected to the top of the kiln bottom 11, an inner kiln wall 14 embedded in the tunnel kiln wall 12, and a feed table 13 embedded in the inner kiln wall 14.

[0034] The tunnel kiln is designed to be divided into six sections, namely, smoke exhaust section, preheating section, firing section, rapid cooling section, indirect slow cooling section and rapid cooling section.

[0035] In the smoke exhaust section, a moisture exhaust port is set at the top of the kiln to ensure uniform temperature in the upper and lower parts of the section, uniform heating of the product, and moisture and smoke during combustion. The temperature of the exhaust port opening control area can be adjusted at any time. The smoke exhaust fan is controlled by the frequency converter at all times, and the fan speed is reasonably adjusted according to the extraction amount required at the right time.

[0036] In the preheating and temperature rising section, small power proportional burners are arranged at multiple points. The burners are arranged at both sides of the bottom kiln wall in a staggered manner. Radiant heating uses the principle of rising hot air to bake the product. The burners are grouped into separate control areas to automatically control the temperature proportionally. Each group controls six burners. In addition, a stirring system is set on both sides of the upper part of the kiln wall to send air into the kiln to adjust the regional pressure, and stir the internal airflow to stir the airflow in a way that the upper and lower pressure differences are balanced to ensure uniform temperature. Multiple air curtain winds are set on the top of the kiln in the preheating section. The air curtain wind direction is in the direction of the kiln car to improve the smoke kiln top and cause smoke overflow. The stirring wind and the kiln head air curtain wind increase the pressure of this section to control the extraction volume of the smoke exhaust fan. The airflow is fully dispersed through stirring to ensure that the product is heated evenly in every corner of the kiln, reduce the temperature difference, and the product is not easy to produce thermal cracking. It prevents excessive heat from coming from the firing area, and the thermal energy utilization effect of the firing area is more lasting, and the energy saving effect is more obvious. In order to improve the stirring performance, the stirring wind ceramic tube adopts a shrinking form.

[0037] In the firing section, the burners are staggered on both sides of the kiln wall to bake the product based on the principle of rising hot air. A special low-power burner is set on the top to adjust the upper temperature to improve the temperature difference between the top and the bottom. The burners are staggered on both sides of the top kiln wall to stir in a balanced way with the pressure difference between the top and the bottom.

[0038] In the rapid cooling section, indoor air is supplied into the kiln from both sides of the upper and lower kiln walls, and the two sides of the upper and lower kiln walls are arranged symmetrically. A wall-exhaust hot air exhaust outlet is set at the rear of the rapid cooling to discharge the heat after the rapid cooling heat exchange.

[0039] In the slow cooling and mixing section, both sides of the upper and lower kiln walls are set to send slow cooling and mixing hot air into the kiln. The air source is the fast-extracted hot air, which is symmetrically arranged on both sides of the upper and lower kiln walls. In addition, exhaust ports are set on the top of the kiln and the kiln car surface to discharge the residual heat of this section to the outside, so as to achieve a safe cooling state for the product. The residual heat discharged from this section can be used as a heat source for the drying kiln.

[0040] It is mentioned above that the design of the tunnel kiln is divided into six sections. During use, waste gas will be generated in any section, so waste gas purification treatment is required. Therefore, the design of the partition component 2, the waste gas treatment component 3 and the purification component 4 is provided in each section;

[0041] During the firing of the tunnel kiln, in order to facilitate the control of the environment inside the tunnel kiln, it is divided into areas. The specific operations are as follows:

[0042] A partition assembly 2 is provided inside the inner kiln wall 14, and the partition assembly 2 includes a partition frame 21. The inner kiln wall 14 is provided with a partition frame 21, and a partition plate 22 is embedded inside the partition frame 21. The partition plate 22 penetrates the inner kiln wall 14 and is embedded into the tunnel kiln wall 12. The inner kiln wall 14 and the partition plate 22 are slidably connected. The partition frame 21 is used to limit the sliding track of the partition plate 22. A traction rod 24 is provided at the top of the partition plate 22. A hydraulic telescopic rod 23 is connected to the top of the tunnel kiln wall 12, and the output end of the hydraulic telescopic rod 23 is connected to the traction rod 24.

[0043] An exhaust gas outlet 25 is embedded at the top of the tunnel kiln wall 12, and a guide block 26 is embedded inside the exhaust gas outlet 25. Both side walls of the guide block 26 are set to be arc-shaped. The bottom width of the guide block 26 is small and the top width is large. A sealing cover 27 is also embedded inside the exhaust gas outlet 25. The sealing cover 27 is movably connected to the exhaust gas outlet 25, and is mounted on the upper surface of the guide block 26 when the exhaust gas outlet 25 is closed.

[0044] When the interior of the inner kiln wall 14 is divided into areas, the partition frame 21 is used for division. After the division, whether to isolate the area from other areas can be determined by controlling the rise and fall of the partition plate 22. For example, when isolation is required, the hydraulic telescopic rod 23 starts to work. When the hydraulic telescopic rod 23 starts to shrink, the traction rod 24 is driven to descend. When the traction rod 24 is lowered, the partition plate 22 is driven to descend. When the partition plate 22 is lowered until it falls to the upper surface of the feed table 13, the two groups of partition plates 22 are driven to descend by the lowering of the two groups of hydraulic telescopic rods 23 and the traction rod 24, so that the area can be separated.

[0045] By separating the areas, the temperature of the area can be better controlled, and the exhaust gas in the area can be treated in a targeted manner;

[0046] In the waste gas purification process, the waste gas treatment component 3 is further improved, and the specific operation is as follows:

[0047] The top of the tunnel kiln wall 12 is provided with an exhaust gas treatment component 3, which includes an exhaust gas treatment chamber 31, on which a blower 32 is installed, a spray chamber 33 is connected to one side of the exhaust gas treatment chamber 31, and a drying chamber 34 is connected to the other side of the exhaust gas treatment chamber 31, the spray chamber 33 and the drying chamber 34 correspond to each other, a hot air pipe 35 is provided at the bottom of the drying chamber 34, a hot air furnace 37 is installed on the outer surface of the inner kiln wall 14, the hot air furnace 37 is connected to the hot air pipe 35, and the top of the hot air pipe 35 is embedded in the inner surface of the drying chamber 34. A spray pipe 36 is provided at the top of the spray bin 33, and an area dividing plate 38 is embedded in the interior of the exhaust gas treatment bin 31. The length of the area dividing plate 38 is only three quarters of the length of the internal space of the exhaust gas treatment bin 31. The upper space and the lower space of the exhaust gas treatment bin 31 are interconnected. The area dividing plate 38 divides the interior of the exhaust gas treatment bin 31 into two parts, an upper part and an lower part. Two groups of blowers 32 are provided, one group delivers flowing air to the upper half of the exhaust gas treatment bin 31, and the other group delivers flowing air to the lower half of the exhaust gas treatment bin 31.

[0048] During air purification, the firing of workpieces inside the inner kiln wall 14 will generate exhaust gas, which flies upward. When the exhaust gas inside the inner kiln wall 14 needs to be treated, the sealing cover 27 is controlled to be opened. When the sealing cover 27 is opened, impurities and harmful gases accompanying the hot air will be blown into the exhaust gas treatment chamber 31 through the exhaust gas outlet 25. After the gas is blown into the exhaust gas treatment chamber 31, the outside air is blown in through the blower 32. At this time, the flowing air from the outside is mixed with the exhaust gas inside the inner kiln wall 14. The flow of the outside air drives the flow of the air inside the inner kiln wall 14. By driving the flow of the internal air, the impurities in the air are removed, and secondly, the harmful substances in the exhaust gas are eliminated.

[0049] A purification component 4 is provided at the bottom end of the waste gas treatment chamber 31. The purification component 4 includes an air inlet 41. The waste gas outlet 25 is embedded in the air inlet 41. The waste gas inside the inner kiln wall 14 flows into the waste gas treatment chamber 31 through the waste gas outlet 25 and the air inlet 41. A filter plate 42 is provided at the lower half of the waste gas treatment chamber 31. The filter plate 42 is divided into two groups, and the apertures opened on the surface thereof are different in size. The filter plate 42 is used to filter impurities in the waste gas. A driving shaft 43 is embedded in the spray chamber 33, and a driven shaft 45 is embedded in the drying chamber 34. A purification belt 44 is sleeved on the surface of the driving shaft 43 and the outer surface of the driven shaft 45. The purification belt 44 forms a connection relationship between the driving shaft 43 and the driven shaft 45. The surface of the purification belt 44 is paved with activated carbon particles, wherein the activated carbon particles are distributed in a honeycomb shape on the outer surface of the purification belt 44. The purification belt 44 is used to absorb sulfur and nitrate in the waste gas.

[0050] When the outside air drives the air flow inside the inner kiln wall 14, the internal exhaust gas will first hit the filter plate 42, and the exhaust gas can be filtered through the filter plate 42, mainly filtering the particulate matter in the exhaust gas. The gas passing through the filter plate 42 will hit the outer surface of the purification belt 44 again, and the activated carbon particles arranged on the outer surface of the purification belt 44 will adsorb the sulfur and nitric substances in the harmful gas. Then, with the blowing of the blower 32 in the upper part of the exhaust gas treatment chamber 31, the exhaust gas passing through the purification belt 44 is purified and finally flows to the upper part of the exhaust gas treatment chamber 31, and then discharged from the interior of the exhaust gas treatment chamber 31 by the blowing of the blower 32;

[0051] Since the length of the area dividing plate 38 does not completely cover the interior of the exhaust gas treatment chamber 31, a low-pressure area will be formed at the disconnection point. When the air in the upper part of the exhaust gas treatment chamber 31 flows under the blowing of the blower 32, the air at the disconnection point between the area dividing plate 38 and the exhaust gas treatment chamber 31 will be better attracted to the upper part of the exhaust gas treatment chamber 31. At this time, the exhaust gas is introduced from the lower part of the exhaust gas treatment chamber 31, and after layers of filtration and purification, it flows to the upper part of the exhaust gas treatment chamber 31 and is finally discharged.

[0052] The purification belt 44 spans the lower part of the exhaust gas treatment chamber 31, and the driving shaft 43 is connected to the driving motor. The driving motor drives the driving shaft 43 to rotate and synchronously drives the purification belt 44 and the driven shaft 45 to rotate. The inner wall of the spray chamber 33 is provided with a brush for cleaning impurities in the exhaust gas. The brush is wrapped on the surface of the purification belt 44. The driving shaft 43 rotates to drive the purification belt 44 to rub on the brush.

[0053] In the process of purifying the waste gas through the purification belt 44, a large amount of harmful substances will be attached to the surface of the purification belt 44 in the long run. If it is not handled, the accidental vibration will cause the harmful substances originally attached to the purification belt 44 to fall off. In order to avoid this problem, in order to ensure the quality of waste gas purification during the purification stage, the purification belt 44 is rotated. On the one hand, the waste gas can contact the purification belt 44 at different positions to avoid the accumulation of harmful substances, and at the same time, the normal purification efficiency can be ensured. In addition, when the purification belt 44 is rotating, the purification belt 44 located inside the spray chamber 33 can be scrubbed on its surface by the built-in brush. During the process, the interior is flushed through the spray pipe 36, and the flushing and brushing are used to eliminate impurities on the surface. When the cleaned purification belt 44 is transferred to the interior of the drying bin 34 as the purification belt 44 rotates, the brushed part of the purification belt 44 will be dried. In order to achieve the rational use of thermal energy, the heat overflowed from the inner kiln wall 14 is collected by the hot air furnace 37, and the collected heat is converted into hot air. The hot air is blown into the interior of the drying bin 34 through the hot air pipe 35, and the purification belt 44 is dried by the hot air. In this way, the purification quality of the purification belt 44 for the exhaust gas can be better ensured, and the heat can be better utilized in the purification work.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving tunnel kiln structure for exhaust gas purification, comprising a kiln bottom (11), characterized in that: The top of the kiln bottom (11) is connected to a tunnel kiln wall (12), an inner kiln wall (14) is embedded in the tunnel kiln wall (12), a feed table (13) is embedded in the inner kiln wall (14), a partitioning component (2) is arranged inside the inner kiln wall (14), the partitioning component (2) comprises a partition frame (21), a partition frame (21) is arranged inside the inner kiln wall (14), a partition plate (22) is embedded in the partition frame (21), a traction rod (24) is arranged at the top of the partition plate (22), a hydraulic telescopic rod (23) is connected to the top of the tunnel kiln wall (12), and the output end of the hydraulic telescopic rod (23) is connected to the traction rod (24); The top of the tunnel kiln wall (12) is embedded with an exhaust gas outlet (25), and a guide block (26) is embedded inside the exhaust gas outlet (25). Both side walls of the guide block (26) are arranged in an arc shape. The bottom width of the guide block (26) is small and the top width is large. A sealing cover (27) is also embedded inside the exhaust gas outlet (25). The sealing cover (27) is movably connected to the exhaust gas outlet (25). When the exhaust gas outlet (25) is closed, it is mounted on the upper surface of the guide block (26); The top of the tunnel kiln wall (12) is provided with an exhaust gas treatment component (3), the exhaust gas treatment component (3) comprises an exhaust gas treatment chamber (31), a blower (32) is installed on the exhaust gas treatment chamber (31), a spray chamber (33) is connected to one side of the exhaust gas treatment chamber (31), and a drying chamber (34) is connected to the other side of the exhaust gas treatment chamber (31), the spray chamber (33) and the drying chamber (34) correspond to each other, a hot air pipe (35) is arranged at the bottom end of the drying chamber (34), a hot air furnace (37) is installed on the outer surface of the inner kiln wall (14), the hot air furnace (37) is connected to the hot air pipe (35), and the top of the hot air pipe (35) is provided with a hot air furnace (37). The end of the exhaust gas treatment chamber (31) is embedded in the interior of the drying chamber (34); a spray pipe (36) is provided at the top of the spray chamber (33); an area dividing plate (38) is embedded in the interior of the exhaust gas treatment chamber (31); the area dividing plate (38) divides the interior of the exhaust gas treatment chamber (31) into two upper and lower parts; two groups of blowers (32) are provided, one group of which delivers flowing air to the upper part of the exhaust gas treatment chamber (31); and the other group of which delivers flowing air to the lower part of the exhaust gas treatment chamber (31); the length of the area dividing plate (38) is only three quarters of the length of the internal space of the exhaust gas treatment chamber (31); and the upper space and the lower space of the exhaust gas treatment chamber (31) are connected to each other; A purification component (4) is provided at the bottom end of the waste gas treatment chamber (31), the purification component (4) comprising an air inlet (41), the waste gas outlet (25) being embedded in the air inlet (41), the waste gas inside the inner kiln wall (14) flowing into the waste gas treatment chamber (31) through the waste gas outlet (25) and the air inlet (41), the lower half of the waste gas treatment chamber (31) being provided with a filter plate (42), the filter plate (42) being divided into two groups, the apertures of different sizes being provided on the surface thereof, the filter plate (42) being used to filter impurities in the waste gas; A driving shaft (43) is embedded in the spray chamber (33), a driven shaft (45) is embedded in the drying chamber (34), a purification belt (44) is sleeved on the surface of the driving shaft (43) and the outer surface of the driven shaft (45), and the purification belt (44) forms a connection relationship between the driving shaft (43) and the driven shaft (45); The purification belt (44) spans across the lower half of the exhaust gas treatment chamber (31), and the drive shaft (43) is connected to a drive motor. The drive motor drives the drive shaft (43) to rotate, thereby synchronously driving the purification belt (44) and the driven shaft (45) to rotate.

2. The energy-saving tunnel kiln structure for exhaust gas purification according to claim 1 is characterized in that: The surface of the purification belt (44) is paved with activated carbon particles, wherein the activated carbon particles are distributed in a honeycomb shape on the outer surface of the purification belt (44), and the purification belt (44) is used to absorb sulfur and nitrate in the exhaust gas.

3. The energy-saving tunnel kiln structure for exhaust gas purification according to claim 1 is characterized in that: The inner wall of the spray chamber (33) is provided with a brush for cleaning impurities in the exhaust gas, the brush is wrapped around the surface of the purification belt (44), and the driving shaft (43) rotates to drive the purification belt (44) to rub against the brush.

4. The energy-saving tunnel kiln structure for exhaust gas purification according to claim 1 is characterized in that: The partition plate (22) penetrates the interior of the inner kiln wall (14) and is embedded in the interior of the tunnel kiln wall (12); the inner kiln wall (14) and the partition plate (22) are slidably connected; and the partition frame (21) is used to limit the sliding track of the partition plate (22).

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