A waste heat recovery device for liquid crystal film processing exhaust gas

Abstract

This invention belongs to the technical field of exhaust gas treatment equipment, and particularly relates to a waste heat recovery device for liquid crystal film processing exhaust gas. The bottom of the reaction tank is connected to an exhaust gas assembly via a gas distribution pipe. Exhaust pipes are installed at the openings of the top of the reaction tank and the bottom of the exhaust gas assembly. A waste heat recovery assembly is installed in both the reaction tank and the exhaust pipes. The waste heat recovery assembly is divided into three sections: a preheating section, a heat exchange section, and a high-temperature section. The internal heat exchange medium is initially preheated at the double-chamber shell by the temperature of the slag discharge exhaust gas. At the third exhaust pipe, it fully contacts the main combustion exhaust gas to absorb waste heat. In the combustion chamber, it undergoes brief high-temperature supplementary heating through exhaust gas combustion, gradually heating the heat exchange medium. The overall heat exchange contact area is large, significantly improving heat exchange efficiency. This allows the heat exchange medium to fully absorb the heat generated during exhaust gas combustion. The heated heat exchange medium can then release heat to do work, avoiding the waste of waste heat from exhaust gas combustion.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas treatment equipment technology, and in particular to a waste heat recovery device for liquid crystal film processing exhaust gas. Background Technology

[0002] Liquid crystal film is a type of film used in automotive windows. During production, a coating machine is used to heat and coat the film in order to apply the liquid crystal layer onto the base layer of the window film. The exhaust gas generated in the oven of the coating machine during production needs to be treated to remove the organic impurities before being discharged. This requires the use of exhaust gas treatment equipment.

[0003] An existing RTO regenerative thermal oxidizer exhaust gas treatment device with application publication number CN114307494 A can effectively dissipate heat from the exhaust gas by spraying water through atomizing nozzles through a cooling mechanism, and at the same time filter the water through a filter screen and sponge, thereby enabling water recycling and saving water resources.

[0004] However, the complex cooling mechanism is only designed to solve the problem of high exhaust gas temperature. Furthermore, the coolant is not effectively utilized after absorbing the high temperature of the exhaust gas; it simply dissipates the heat and continues to circulate for cooling. During this process, a large amount of water and thermal energy resources are wasted. Therefore, we propose a waste heat recovery device for liquid crystal film processing exhaust gas to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of water and heat energy waste caused by high-temperature exhaust gas in the prior art, and to propose a waste heat recovery device for liquid crystal film processing exhaust gas.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A waste heat recovery device for liquid crystal film processing exhaust gas includes a reaction tank. A gas passing component is connected to the bottom of the reaction tank via a gas distribution pipe. Exhaust pipes are installed at the top opening of the reaction tank and the bottom opening of the gas passing component. A waste heat recovery component is installed in the reaction tank and the exhaust pipes. A gas supply component is installed through the upper part of the reaction tank. The waste heat recovery component includes a preheating section, a heat exchange section, and a high-temperature section. An input pipe is installed through the preheating section, and a relay pipe is installed at the rear end of the input pipe. The heat exchange section and the high-temperature section are connected in series on the relay pipe. The gas passing component includes a dual-chamber shell with independent gas supply chambers and slag discharge chambers. The dual-chamber shell is located to the right of the gas supply chamber. A centrifugal fan is installed at the end opening position, and the preheating section is installed in the slag discharge chamber; the reaction tank includes a reaction tank with a built-in heat storage component, the high-temperature section is located on the upper inner side of the reaction tank, the top of the heat storage component is provided with an inner shell, the inner shell and the high-temperature section enclose to form a combustion chamber, the bottom end of the gas supply component extends into the combustion chamber, the top end of the combustion chamber is connected to the flue gas pipe through the high-temperature section, and the bottom end of the combustion chamber is connected to the slag discharge chamber through a central pipe with a partition ring; the flue gas pipe includes a first flue gas pipe connecting the combustion chamber and a third flue gas pipe connecting the slag discharge chamber, a second flue gas pipe is connected in series between the first flue gas pipe and the third flue gas pipe, and the heat exchange section is located in the second flue gas pipe;

[0008] The exhaust gas enters the combustion chamber of the tank through the gas supply chamber of the gas assembly. The gas supply assembly provides oxygen to the combustion chamber. Most of the combustion heat is absorbed by the inner shell and the high-temperature section. The heat absorbed by the inner shell is stored in the heat storage component to provide the reaction temperature for subsequent exhaust gas. The heat absorbed by the high-temperature section is used to further heat the heat exchange medium. A small portion of the high-temperature exhaust gas carries solid waste and is discharged downwards. At the slag discharge chamber, the heat exchange medium inside the input pipe is preheated by the preheating section. Most of the exhaust gas flows from the first smoke pipe through the second smoke pipe through the curved heat exchange section and then merges with the exhaust gas in the third smoke pipe before being discharged together. The heat exchange section fully heats the internal heat exchange medium, ensuring a high output temperature. Compared with the traditional water bath cooling method, the heat of exhaust gas combustion can be fully recovered and utilized.

[0009] Preferably, a heat-conducting plate is embedded in the side wall of the middle tube, a bearing ring is installed on the outside of the middle tube between the heat-conducting plates, and honeycomb blocks are arranged in layers between the heat-conducting plates. The honeycomb blocks include a first honeycomb block near the inner shell and a second honeycomb block near the gas distribution pipe. The first and second honeycomb blocks are provided with lugs on the side facing the middle tube, and the side wall of the middle tube is provided with a notch that cooperates with the lugs and the heat-conducting plate.

[0010] The heat stored in the honeycomb blocks can be used to create an environment for the combustion reaction of organic impurities. The heat-conducting plate and the honeycomb blocks are detachably clipped into the slots on the side wall of the central tube, which increases the contact area and ensures rapid heat transfer. At the same time, the slots are used to align and limit the first honeycomb blocks to avoid blocking the flow of exhaust gas. The first honeycomb blocks near the combustion chamber may be scorched and cracked by high temperature, so the first honeycomb blocks are divided into multiple layers for easy individual replacement and maintenance.

[0011] Preferably, the high-temperature section includes a vertical cylinder located inside the combustion chamber, and a reverse-folded skirt is installed on the outer side of the vertical cylinder, with the middle sidewall of the reverse-folded skirt and the outer side of the vertical cylinder arranged at an acute angle;

[0012] When the exhaust gas is discharged after combustion, it is blocked and slowed down by the vertical cylinder. The solid waste in the exhaust gas falls downward and is captured by the exhaust gas discharged downward from the middle pipe, ensuring the cleanliness of the rising exhaust gas. The vertical cylinder and the reverse folded skirt increase the contact area between the high temperature part and the exhaust gas in the combustion chamber, increasing the heat that can be absorbed when the heat exchange medium flows through rapidly.

[0013] Preferably, the inner shell is a frustum-shaped cone that is wider at the top and narrower at the bottom. The bottom opening of the inner shell is connected to the central hole of the central tube. The top of the inner shell is provided with an inner bend. The lower part of the high-temperature section is placed in the inner bend. The edge sidewall of the high-temperature section and the inner bend form a flow equalization cavity.

[0014] The flow equalization cavity is formed by the inner curved end, so that the exhaust gas enters the combustion chamber evenly from all sides. The truncated cone shape, which is thicker at the top and narrower at the bottom, increases the flow path of the exhaust gas entering the combustion chamber and reduces the flow velocity, ensuring that the organic impurities in the exhaust gas can be fully burned.

[0015] Preferably, the high-temperature section includes a heat insulation seat fixed at the top opening of the tank body, a cylinder is installed at the bottom of the heat insulation seat, the top of the heat insulation seat is connected to the right opening of the first flue, a hollow ring is installed on the lower outer side of the cylinder, and a material passage chamber connected in series with the relay pipe is provided on the inner side of the cylinder and the hollow ring.

[0016] The heat insulation seat prevents heat from being lost at the first flue pipe position. The hollow ring and cylinder bring the heat exchange medium close to the combustion position for heating, and the material passage cavity allows the heat exchange medium to flow evenly, further ensuring that the heat exchange medium is fully heated.

[0017] Preferably, the bottom end of the gas supply assembly is provided with a gas supply head, the end of the gas supply head is built with an ignition electrode, and the hollow ring is provided with a through hole in the middle that cooperates with the gas supply head.

[0018] Multiple air supply heads are arranged to provide oxygen to the combustion chamber from all sides through through holes, ensuring that the incoming exhaust gas is fully mixed with oxygen. The ignition electrode can ignite the mixture in the early stage of exhaust gas entry, and the subsequent mixture will be ignited by the accumulated temperature of the combustion chamber and the residual flame.

[0019] Preferably, the second flue is equipped with a reversing valve at both the upper and lower ends, the first flue is provided with a bypass pipe to the left of the reversing valve, the lower part of the second flue is provided with an expansion cavity, the heat exchange section is provided in the expansion cavity, the heat exchange section includes a triple tube group and a double tube group, the triple tube group and the double tube group are arranged in an alternating manner, and the front and rear ends of the triple tube group and the double tube group are connected to form a series pipeline through a connecting part;

[0020] The reversing valve can separate the second flue from the first and third flue when maintaining the heat exchange section, without affecting the normal combustion of exhaust gas. The triple and double pipe groups in the heat exchange section are arranged in multiple layers, which can ensure that all exhaust gas is in full contact with the heat exchange section and can reduce the exhaust gas flow rate and increase the contact time.

[0021] Preferably, the preheating section includes multiple layers of vertically coaxially sleeved fins, with openings at both the upper and lower ends of the fins, an air passage between adjacent fins, and the input pipe is installed through the middle of the fins.

[0022] The exhaust gas carrying solid waste enters the air passage between the fins from top to bottom. The exhaust gas comes into full contact with the thin fins for sufficient heat exchange, without wasting the heat of the exhaust gas.

[0023] Preferably, the fins form a horizontal expansion section that is thicker in the middle and thinner at both ends, the air passage is bent at an acute angle at the horizontal expansion section, and a bottom plate is installed at the bottom of the double-cavity shell;

[0024] The horizontal expansion section allows the fins to make full use of the internal space of the air supply chamber to increase the contact heat exchange area, and the sharp-angle bend of the air passage can increase the impact resistance to solid waste in the exhaust gas and improve the solid-gas separation effect.

[0025] Preferably, a lower folding plate is provided at the upper edge of the connecting end of the third smoke pipe and the double-cavity shell, and an upper folding plate is provided at the lower edge of the connecting end of the third smoke pipe and the double-cavity shell. The upper folding plate and the lower folding plate are vertically arranged at the right end of the third smoke pipe to form a turbulent flow channel, and the upper folding plate is provided with an extension in the turbulent flow channel.

[0026] The upper baffle increases the height of the lower edge of the third flue, preventing the waste residue accumulated on the bottom plate from directly entering the third flue. The lower baffle, together with the upper baffle, forms a turbulent flow channel, which further separates and drops the waste residue in the exhaust gas, ensuring that the exhaust gas is cleaner.

[0027] Compared with existing technologies, the advantages of this liquid crystal film processing exhaust heat recovery device are as follows:

[0028] 1. Through the setting of the waste heat recovery component, the waste heat recovery component is divided into three sections: preheating section, heat exchange section and high temperature section. The heat exchange medium inside is initially preheated by the temperature of the slag discharge exhaust gas at the double-chamber shell. It fully contacts the main combustion exhaust gas at the third flue to absorb waste heat. In the combustion chamber, it is briefly heated by the combustion of exhaust gas to gradually heat the heat exchange medium. The overall heat exchange contact area is large, which greatly improves the heat exchange efficiency. This allows the heat exchange medium to fully absorb the heat generated during the combustion of exhaust gas. The heated heat exchange medium can release heat to do work and avoid the waste of waste heat from the combustion of exhaust gas.

[0029] 2. Through the setting of the heat storage component, the combustion chamber formed by the inner shell and the high temperature section, the exhaust gas is blown into the combustion chamber from the bottom of the tank and ignited by the gas supply component. The inner shell, with the middle tube, can absorb and transfer the combustion heat to the stacked honeycomb blocks for heat storage. The exhaust gas that enters later is heated to the reaction temperature by the honeycomb blocks and then ignited by the exhaust gas burning inside the combustion chamber for continuous combustion. The combustion heat is stored and utilized. There is no need to repeat the ignition operation during the combustion process. The dense honeycomb holes on the honeycomb blocks can disperse and guide the exhaust gas and heat it evenly. The uniform inner diameter of the flow equalization chamber ensures that the exhaust gas entering the combustion chamber is evenly distributed and burns completely.

[0030] 3. Through the design of the exhaust assembly, the waste residue produced by combustion in the combustion chamber will be decelerated by friction with the vertical cylinder with reverse folded skirts during exhaust gas flow, causing the solid waste residue to settle to the lower part of the inner shell. The smaller diameter middle pipe forms a second exhaust path, allowing the settled solid impurities to enter the slag discharge chamber with a small amount of exhaust gas. Because the flow rate and heat are low here, the exhaust gas will be used to preheat the exhaust gas in the air supply chamber and the heat exchange medium in the preheating section. The fins of the preheating section, while increasing the heat exchange contact area with the exhaust gas, can also significantly change the exhaust gas flow direction, causing the waste residue in the exhaust gas to be decelerated by friction and settle at the bottom plate for unified treatment. Similarly, the upper and lower folded plates of the third smoke pipe form a turbulent flow channel, causing the small amount of extended parts in the exhaust gas to be decelerated by friction again, ensuring the cleanliness of the exhaust gas. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the left side of the present invention;

[0032] Figure 2 This is a cross-sectional view of the shell-shaped device of the present invention;

[0033] Figure 3 This is a front view schematic diagram of the waste heat recovery component and the heat storage component of the present invention;

[0034] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the reaction vessel of the present invention;

[0035] Figure 5This is a cross-sectional schematic diagram of the interior of the air passage component of the present invention;

[0036] Figure 6 for Figure 5 Enlarged view of point a in the middle;

[0037] Figure 7 This is a diagram showing the positional relationship between the waste heat recovery component and the heat storage component of the present invention;

[0038] Figure 8 This is a cross-sectional schematic diagram of the high-temperature section in the waste heat recovery component of the present invention.

[0039] In the diagram: Air passage assembly 1, double-chamber shell 11, air supply chamber 111, slag discharge chamber 112, bottom plate 113, gas distribution pipe 12, reaction vessel 2, tank body 21, first honeycomb block 22, second honeycomb block 221, support lug 222, heat storage assembly 23, inner shell 231, central pipe 232, heat conduction plate 233, partition ring 234, bearing ring 235, flow equalization chamber 236, inner bend end 237, central hole 238, slot 239, exhaust pipe fitting 3, first exhaust pipe 31, bypass pipe 311, second exhaust pipe 32, third exhaust pipe... Pipe 33, lower folding plate 331, upper folding plate 332, turbulent flow channel 333, extension section 334, waste heat recovery assembly 4, preheating section 41, fins 411, air passage 412, horizontal expansion section 413, heat exchange section 42, triple pipe assembly 421, connecting section 422, double pipe assembly 423, high temperature section 43, cylinder 431, hollow ring 432, vertical cylinder 433, heat insulation seat 434, through hole 435, reverse folded skirt 436, material passage cavity 437, input pipe 44, relay pipe 45, air supply assembly 5. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0041] Example 1

[0042] Reference Figure 1-3A waste heat recovery device for liquid crystal film processing exhaust gas includes a reaction tank 2. A gas distribution pipe 1 is connected to the bottom of the reaction tank 2 via a gas distribution pipe 12. A flue gas pipe 3 is installed at the top opening of the reaction tank 2 and the bottom opening of the gas distribution pipe 1. A waste heat recovery component 4 is installed in the reaction tank 2 and the flue gas pipe 3. A gas supply component 5 is installed through the upper part of the reaction tank 2. The waste heat recovery component 4 includes a preheating section 41, a heat exchange section 42, and a high-temperature section 43. An input pipe 44 is installed through the preheating section 41, and a relay pipe 45 is installed at the rear end of the input pipe 44. The heat exchange section 42 and the high-temperature section 43 are connected in series on the relay pipe 45. The gas distribution pipe 1 includes a double-cavity shell 11 with an independent gas supply chamber 111 and a slag discharge chamber 112. The double-cavity shell 11 is located at the right end of the gas supply chamber 111. A centrifugal fan is installed at the opening position, and the preheating section 41 is installed in the slag discharge chamber 112; the reaction tank 2 includes a reaction tank 2 with a built-in heat storage component 23, the high temperature section 43 is located on the upper inner side of the reaction tank 2, the top of the heat storage component 23 is provided with an inner shell 231, the inner shell 231 and the high temperature section 43 surround to form a combustion chamber, the bottom end of the gas supply component 5 extends into the combustion chamber, the top of the combustion chamber is connected to the flue pipe 3 through the high temperature section 43, and the bottom end of the combustion chamber is connected to the slag discharge chamber 112 through a middle pipe 232 with a partition ring 234; the flue pipe 3 includes a first flue pipe 31 connecting the combustion chamber and a third flue pipe 33 connecting the slag discharge chamber 112, a second flue pipe 32 is connected in series between the first flue pipe 31 and the third flue pipe 33, and the heat exchange section 42 is located in the second flue pipe 32.

[0043] In the process of coating the liquid crystal layer onto the base layer of the car window film using a coating machine to heat and coat the base layer with the liquid crystal layer, the exhaust gas generated in the oven of the coating machine contains a large amount of organic impurities. This exhaust gas, carrying impurities, is drawn into the gas passing component 1 by the centrifugal fan. The gas passing component 1 then feeds the exhaust gas into the combustion chamber of the tank 21 through the gas supply chamber 111. The gas supply component 5 provides oxygen to the combustion chamber and ignites the mixture. The combustion of organic impurities in the exhaust gas generates a large amount of heat, which is absorbed by the inner shell 231 and the high-temperature section 43. The heat absorbed by the inner shell 231 is stored in the heat storage component 23, ensuring that the exhaust gas temperature can be raised to approximately 800°C, the optimal reaction temperature. The high-temperature exhaust gas is ignited by the internal combustion exhaust gas in the combustion chamber. After ignition, the gas supply component 5 maintains... As long as oxygen supply is guaranteed, combustion can continue. A small portion of the high-temperature exhaust gas, carrying solid waste, is discharged downwards from the central pipe 232. At the slag discharge chamber 112, the heat exchange medium inside the input pipe 44 is preheated by the preheating section 41 to avoid wasting the heat of this part of the exhaust gas. Most of the exhaust gas is discharged from the first flue pipe 31, passes through the second flue pipe 32 from top to bottom through the curved heat exchange section 42, and then merges with the exhaust gas in the third flue pipe 33 before being discharged together. The large surface area of ​​the heat exchange section 42 allows for sufficient contact heating of the internal heat exchange medium, ensuring that the residual heat in the main exhaust gas at the second flue pipe 32 is fully absorbed. The high-temperature section 43 absorbs the heat from the combustion chamber to supplement the heating of the heat exchange medium inside the relay pipe 45. The relay pipe 45 uses a jacketed insulation pipe to avoid heat loss during transportation and ensure a high temperature of the output heat exchange medium.

[0044] Example 2

[0045] Reference Figure 2-4 7. A liquid crystal film processing exhaust gas waste heat recovery device includes a reaction tank 2. An exhaust gas assembly 1 is connected to the bottom of the reaction tank 2 via a gas distribution pipe 12. A smoke exhaust pipe 3 is installed at the top opening of the reaction tank 2 and the bottom opening of the exhaust gas assembly 1. A waste heat recovery assembly 4 is installed in the reaction tank 2 and the smoke exhaust pipe 3. A gas supply assembly 5 is installed through the upper part of the reaction tank 2. The waste heat recovery assembly 4 includes a preheating section 41, a heat exchange section 42, and a high-temperature section 43. An input pipe 44 is installed through the preheating section 41, and a gas supply assembly 5 is installed at the rear end of the input pipe 44. There is a relay pipe 45, and the heat exchange section 42 and the high temperature section 43 are connected in series on the relay pipe 45; the reaction tank 2 includes a reaction tank 2 with a built-in heat storage component 23. The high temperature section 43 is located on the upper part of the inner side of the reaction tank 2. The top of the heat storage component 23 is provided with an inner shell 231. The inner shell 231 and the high temperature section 43 surround to form a combustion chamber. The bottom end of the gas supply component 5 extends into the combustion chamber. The top of the combustion chamber is connected to the flue gas pipe 3 through the high temperature section 43. The bottom end of the combustion chamber is connected to the slag discharge chamber 112 through the middle pipe 232 with a partition ring 234.

[0046] Specifically, a heat-conducting plate 233 is embedded in the side wall of the central tube 232, and a bearing ring 235 is installed on the outside of the central tube 232 between the heat-conducting plates 233. A honeycomb block is arranged in a stacked manner between the heat-conducting plates 233. The honeycomb block includes a first honeycomb block 22 near the inner shell 231 and a second honeycomb block 221 near the gas distribution pipe 12. The first honeycomb block 222 and the second honeycomb block 221 are provided with a support ear 222 on the side facing the central tube 232. A notch 239 is opened on the side wall of the central tube 232 to cooperate with the support ear 222 and the heat-conducting plate 233.

[0047] It is worth noting that the high-temperature section 43 includes a vertical cylinder 433 located inside the combustion chamber. A reverse-folded skirt 436 is installed on the outside of the vertical cylinder 433. The middle side wall of the reverse-folded skirt 436 and the outside of the vertical cylinder 433 are arranged at an acute angle.

[0048] It is worth noting that the inner shell 231 is a frustoconical shape that is thicker at the top and narrower at the bottom. The bottom opening of the inner shell 231 is connected to the central hole 238 of the central tube 232. The top of the inner shell 231 is provided with an inner bend end 237. The lower part of the high-temperature part 43 is placed in the inner bend end 237. The edge sidewall of the high-temperature part 43 and the inner bend end 237 form a flow equalization cavity 236.

[0049] During use, to ensure convenient maintenance of the combustion position and clean exhaust gas, the heat-conducting plate 233 and the honeycomb block are detachably clipped into the slot 239 on the side wall of the central tube 232. This increases the contact area, ensuring rapid heat transfer while facilitating top-down installation. The slot 239 provides alignment and limits, ensuring the alignment of the honeycomb holes within the multi-layered first honeycomb block 22 and preventing obstruction of exhaust gas flow. Since the first honeycomb block 22 near the combustion chamber may crack due to high-temperature burning, it is divided into multiple layers, overlapped and separated by a bearing ring 235 with honeycomb holes. This allows for easy replacement and maintenance when some first honeycomb blocks 22 are damaged and unusable. Exhaust gas passes through the dense honeycomb holes, ensuring uniform distribution. The honeycomb hole design provides a large heat exchange contact area, resulting in rapid heating of the rising exhaust gas. The heat stored in the honeycomb block can be fully absorbed and utilized, improving the efficiency of exhaust gas heating. The central opening of section 43 allows exhaust gas entering the combustion chamber from all sides to exit through the opening after combustion. Before exiting, the exhaust gas is blocked by the vertical cylinder 433 and, together with the reverse-folded skirt 436, forms a deceleration section with an acute angle, causing the exhaust gas to flow turbulently and slow down. This significantly reduces the speed of solid waste residue in the exhaust gas through friction, causing the waste residue to fall downwards under gravity and be captured by the exhaust gas exiting downwards from the central pipe 232. This ensures that the rising exhaust gas is relatively clean. Furthermore, the vertical cylinder 433 and the reverse-folded skirt 436 increase the contact area between the high-temperature section 43 and the exhaust gas in the combustion chamber, absorbing more heat to heat the heat exchange medium and increasing the amount of heat that the heat exchange medium can absorb when it flows rapidly. The shape of the inner shell 231, with the inner curved end 237 forming a flow equalization cavity 236, allows the exhaust gas to enter the combustion chamber evenly from all sides. The truncated cone shape, which is thicker at the top and narrower at the bottom, increases the flow path of the exhaust gas entering the combustion chamber and reduces the flow velocity, ensuring that the organic impurities in the exhaust gas can be fully burned.

[0050] Example 3

[0051] Reference Figure 27 and 8, a liquid crystal film processing exhaust gas waste heat recovery device, including a reaction tank 2, with an exhaust component 1 connected to the bottom of the reaction tank 2 via a gas distribution pipe 12. A smoke exhaust pipe 3 is installed at the top opening of the reaction tank 2 and the bottom opening of the exhaust component 1. A waste heat recovery component 4 is installed in the reaction tank 2 and the smoke exhaust pipe 3. A gas supply component 5 is installed through the upper part of the reaction tank 2. The waste heat recovery component 4 includes a preheating section 41, a heat exchange section 42, and a high-temperature section 43. An input pipe 44 is installed through the preheating section 41, and a gas supply component 5 is installed at the rear end of the input pipe 44. A relay pipe 45 is installed, and a heat exchange section 42 and a high-temperature section 43 are connected in series on the relay pipe 45; the reaction tank 2 includes a reaction tank 2 with a built-in heat storage component 23. The high-temperature section 43 is located on the upper inner side of the reaction tank 2. The top of the heat storage component 23 is provided with an inner shell 231. The inner shell 231 and the high-temperature section 43 surround to form a combustion chamber. The bottom end of the gas supply component 5 extends into the combustion chamber. The top end of the combustion chamber is connected to the flue gas pipe 3 through the high-temperature section 43. The bottom end of the combustion chamber is connected to the slag discharge chamber 112 through a middle pipe 232 with a partition ring 234.

[0052] Specifically, the high-temperature section 43 includes a heat insulation seat 434 fixed at the top opening of the tank body 21. A cylinder 431 is installed at the bottom of the heat insulation seat 434. The top of the heat insulation seat 434 is connected to the right opening of the first smoke pipe 31. A hollow ring 432 is installed on the lower outer side of the cylinder 431. A material passage chamber 437 connected in series with the relay pipe 45 is provided inside the cylinder 431 and the hollow ring 432.

[0053] Furthermore, the bottom of the gas supply assembly 5 is provided with a gas supply head, the end of which has a built-in ignition electrode, and the hollow ring 432 has a through hole 435 in the middle that mates with the gas supply head.

[0054] In application, to ensure that the heat exchange medium can be rapidly heated at the high-temperature section 43, the heat insulation seat 434 can prevent the heat at the high-temperature section 43 from being conducted to the first flue pipe 31, thus avoiding heat loss. The material passage 437 in the hollow ring 432 and the cylinder 431 can flow through the heat exchange medium, approaching the combustion position for heating. Furthermore, the material passage 437 is narrow in height, causing the heat exchange medium to flow in a thin sheet rather than a columnar shape, further ensuring that the heat exchange medium is fully heated. Multiple gas supply heads are arranged to provide oxygen to the combustion chamber from all sides through the through holes 435, ensuring that the incoming exhaust gas is fully mixed with oxygen. The ignition electrode can ignite the mixture in the early stage of exhaust gas entry, and the subsequent mixture will be ignited by the accumulated temperature of the combustion chamber and the residual flame.

[0055] Example 4

[0056] Reference Figure 2 and 3A waste heat recovery device for liquid crystal film processing exhaust gas includes a reaction tank 2. An exhaust assembly 1 is connected to the bottom of the reaction tank 2 via a gas distribution pipe 12. A flue gas pipe 3 is installed at the top opening of the reaction tank 2 and the bottom opening of the exhaust assembly 1. A waste heat recovery assembly 4 is installed in the reaction tank 2 and the flue gas pipe 3. A gas supply assembly 5 is installed through the upper part of the reaction tank 2. The waste heat recovery assembly 4 includes a preheating section 41, a heat exchange section 42, and a high-temperature section 43. An input pipe 44 is installed through the preheating section 41, and a relay pipe 45 is installed at the rear end of the input pipe 44. The heat exchange section 42 and the high-temperature section 43 are connected in series on the relay pipe 45. The flue gas pipe 3 includes a first flue gas pipe 31 connecting to the combustion chamber and a third flue gas pipe 33 connecting to the slag discharge chamber 112. A second flue gas pipe 32 is connected in series between the first flue gas pipe 31 and the third flue gas pipe 33, and the heat exchange section 42 is located in the second flue gas pipe 32.

[0057] Specifically, the second flue pipe 32 is equipped with a reversing valve at both its upper and lower ends. The first flue pipe 31 is provided with a bypass pipe 311 on the left side of the reversing valve. The lower part of the second flue pipe 32 is provided with an expansion cavity. The heat exchange section 42 is located in the expansion cavity. The heat exchange section 42 includes a triple pipe group 421 and a double pipe group 423. The triple pipe group 421 and the double pipe group 423 are arranged in an alternating manner, and the front and rear ends of the triple pipe group 421 and the double pipe group 423 are connected in series through the connecting part 422 to form a series pipeline.

[0058] In operation, to improve the waste heat recovery effect of the heat exchange section 42 on the exhaust gas, the reversing valve can control the conduction direction of the upper and lower ends of the second flue pipe 32. When maintaining the heat exchange section 42, the second flue pipe 32 can be separated from the first flue pipe 31 and the third flue pipe 33. The exhaust gas of the first flue pipe 31 is directly discharged from the bypass pipe 311 without affecting the normal combustion of the exhaust gas. The heat exchange section 42 is connected to the relay pipe 45 through a flange. The preheating section 41 and the high temperature section 43 also adopt the flange connection method, which can be completely removed for maintenance and replacement. The triple pipe group 421 and the double pipe group 423 of the heat exchange section 42 are arranged in multiple layers to increase the spatial length of contact with the exhaust gas. The positions of the pipe groups between the upper and lower layers are staggered to the left and right, so that the exhaust gas is continuously blocked and turbulently reversed when it flows from top to bottom. Compared with vertical flow, it can increase the diversity of exhaust gas flow direction, so that all exhaust gas can fully contact the heat exchange section 42, and can reduce the exhaust gas flow velocity and increase the contact time.

[0059] Example 5

[0060] Reference Figure 2 , 56. A liquid crystal film processing tail gas waste heat recovery device includes a reaction tank 2. The bottom end of the reaction tank 2 is connected to a gas distribution pipe 12 and a gas passing component 1 is provided. A smoke exhaust pipe 3 is installed at the top opening of the reaction tank 2 and the bottom opening of the gas passing component 1. A waste heat recovery component 4 is installed in the reaction tank 2 and the smoke exhaust pipe 3. A gas supply component 5 is installed through the upper part of the reaction tank 2. The waste heat recovery component 4 includes a preheating section 41, a heat exchange section 42 and a high temperature section 43. An input pipe 44 is installed through the preheating section 41. A relay pipe 45 is installed at the rear end of the input pipe 44. The heat exchange section 42 and the high temperature section 43 are connected in series on the relay pipe 45. The gas passing component 1 includes a double-cavity shell 11 with an independent gas supply chamber 111 and a slag discharge chamber 112. A centrifugal fan is provided at the right end opening of the gas supply chamber 111 in the double-cavity shell 11. The preheating section 41 is installed in the slag discharge chamber 112.

[0061] Specifically, the preheating section 41 includes multiple layers of vertically coaxially sleeved fins 411. The upper and lower ends of the fins 411 are provided with openings, and an air passage 412 is provided between adjacent fins 411. The input pipe 44 is installed through the middle of the fins 411.

[0062] Furthermore, a horizontal expansion section 413, which is thicker in the middle and thinner at both ends, is formed in the middle of the fin 411. The air passage 412 is bent at an acute angle at the position of the horizontal expansion section 413. A bottom plate 113 is installed at the bottom end of the double cavity shell 11.

[0063] Furthermore, a lower folding plate 331 is provided at the upper edge of the connecting end of the third smoke pipe 33 and the double cavity shell 11, and an upper folding plate 332 is provided at the lower edge of the connecting end of the third smoke pipe 33 and the double cavity shell 11. The upper folding plate 332 and the lower folding plate 331 are vertically arranged at the right end of the third smoke pipe 33 to form a turbulent flow channel 333. An extension 334 is provided in the turbulent flow channel 333 of the upper folding plate 332.

[0064] During use, to enhance the functionality of the preheating section 41, the fins 411 have openings at the top and bottom. The exhaust gas carrying solid waste enters from top to bottom into the air passage 412 between the fins 411. The exhaust gas makes full contact with the thin fins 411 for thorough heat exchange, allowing the heat to be used to preheat the low-temperature heat exchange medium and the exhaust gas flowing through the air supply chamber 111, thus preventing waste of the exhaust gas's heat. The horizontal expansion section 413 increases the surface area of ​​the fins 411 while maintaining the same height, fully utilizing the internal space of the air supply chamber 111 and effectively increasing the contact heat exchange area. Furthermore, the air passage 412 bends at an acute angle at the horizontal expansion section 413, allowing for… To improve the impact resistance of solid waste in the exhaust gas, resulting in better solid-gas separation, the exhaust gas after heat exchange and slag removal is discharged from the third flue 33, and the waste falls onto the bottom plate 113, waiting for subsequent removal and cleaning. The upper baffle 332 raises the height of the lower edge of the third flue 33, preventing the waste accumulated on the bottom plate 113 from directly entering the third flue 33. The lower baffle 331, together with the upper baffle 332, forms a turbulent flow channel 333. The exhaust gas entering the turbulent flow channel 333 is blocked and its direction is changed by the extension 334, resulting in turbulent flow and deceleration of the exhaust gas, which further separates and drops the waste in the exhaust gas, ensuring that the discharged exhaust gas is cleaner and preventing the third flue 33 from being blocked by waste.

[0065] The centrifugal fan involved in the embodiment is a finished fan produced by Shanghai Yongce Machinery Equipment Co., Ltd., and the heat exchange medium is heat exchange oil. It is circulated and pushed by an existing circulating pump. The electrical control equipment used, including the matching control system, solenoid valve, electric control switch, and pipeline circuit, can also be provided by the manufacturer. In addition, the power supply module, circuit, electronic components and control module involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this invention does not involve the improvement of the internal structure and method.

[0066] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A liquid crystal film processing tail gas waste heat recovery device, comprising a reaction tank (2), the bottom end of the reaction tank (2) is communicated with a gas distribution pipe (12) and provided with a gas passing assembly (1), the top opening of the reaction tank (2) is installed with a smoke exhaust pipe (3) at the bottom opening position of the gas passing assembly (1), a waste heat recovery assembly (4) is installed in the reaction tank (2) and the smoke exhaust pipe (3), a gas supply assembly (5) is installed through the upper part of the reaction tank (2), characterized in that, the waste heat recovery assembly (4) comprises a preheating part (41), a heat exchange part (42) and a high temperature part (43), an input pipe (44) is installed through the preheating part (41), a relay pipe (45) is installed at the rear end of the input pipe (44), the heat exchange part (42) and the high temperature part (43) are arranged in series on the relay pipe (45); the gas passing assembly (1) comprises a double cavity shell (11) with a gas supply cavity (111) and a residue discharge cavity (112) which are independent of each other, the preheating part (41) is installed in the residue discharge cavity (112); the reaction tank (2) comprises a tank body (21) with a heat storage assembly (23) built-in, the high temperature part (43) is arranged inside the tank body (21), the heat storage assembly (23) comprises an inner shell (231), the inner shell (231) and the high temperature part (43) form a combustion chamber, the top end of the combustion chamber is communicated with the smoke exhaust pipe (3) through the high temperature part (43), the bottom end of the combustion chamber is communicated with the residue discharge cavity (112) through a middle pipe (232); the smoke exhaust pipe (3) comprises a first smoke pipe (31) connected with the combustion chamber and a third smoke pipe (33) connected with the residue discharge cavity (112), a second smoke pipe (32) is arranged in series between the first smoke pipe (31) and the third smoke pipe (33), the heat exchange part (42) is arranged in the second smoke pipe (32).

2. The liquid crystal film processing tail gas waste heat recovery device according to claim 1, characterized in that, The side wall of the middle pipe (232) is embedded with heat conducting plates (233), honeycomb blocks arranged in layers are arranged between the heat conducting plates (233), the honeycomb blocks are provided with lugs (222) towards the side of the middle pipe (232), and the side wall of the middle pipe (232) is provided with a slot (239).

3. The liquid crystal film processing tail gas waste heat recovery device according to claim 2, characterized in that, The high temperature part (43) comprises a vertical cylinder (433) arranged inside the combustion chamber, and a reverse folding skirt (436) is arranged outside the vertical cylinder (433).

4. The liquid crystal film processing tail gas waste heat recovery device according to claim 3, characterized in that, The bottom opening of the inner shell (231) is communicated with the middle hole (238) of the middle pipe (232), the top end of the inner shell (231) is provided with an inner bent end (237), the lower part of the high temperature part (43) is arranged in the inner bent end (237), and the edge side wall of the high temperature part (43) and the inner bent end (237) form a uniform flow cavity (236).

5. The liquid crystal film processing tail gas waste heat recovery device according to claim 1, characterized in that, The high temperature part (43) comprises a cylinder (431), a hollow ring (432) is arranged at the lower part outside the cylinder (431), and a material passing cavity (437) is arranged inside the cylinder (431) and the hollow ring (432) and communicated with the relay pipe (45).

6. The liquid crystal film processing tail gas waste heat recovery device according to claim 5, characterized in that, The air supply assembly (5) is provided with an air supply head at the bottom end, and a sparking electrode is arranged in the end of the air supply head.

7. The liquid crystal film processing tail gas waste heat recovery device according to claim 1, characterized in that, The heat exchange part (42) comprises a three-pipe group (421) and a two-pipe group (423), the three-pipe group (421) and the two-pipe group (423) are arranged in a staggered manner in layers, and the three-pipe group (421) and the two-pipe group (423) are connected by a communication part (422) at the front and rear ends to form a series pipeline.

8. The liquid crystal film processing tail gas waste heat recovery device according to claim 1, characterized in that, The preheating part (41) comprises fins (411) arranged in a coaxial sleeve, and the fins (411) are provided with openings at the upper and lower ends, and air passages (412) are arranged between adjacent fins (411).

9. The liquid crystal film processing tail gas waste heat recovery device according to claim 8, characterized in that, The middle part of the fin (411) forms a horizontal expansion part (413) with thick middle and thin ends, and the air passage (412) is bent at an acute angle at the position of the horizontal expansion part (413).

10. The liquid crystal film processing tail gas waste heat recovery device according to claim 9, characterized in that, The right end of the third smoke pipe (33) is provided with a lower folding plate (331) along the upper edge, and the right end of the third smoke pipe (33) is provided with an upper folding plate (332) along the lower edge, a turbulent flow channel (333) is formed between the upper folding plate (332) and the lower folding plate (331), and the upper folding plate (332) is provided with an extension (334) in the turbulent flow channel (333).

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