A waste gas incineration system

Abstract

The present invention relates to a waste gas incineration system, comprising: a first furnace body, having an incineration channel for decomposing waste gas; a waste gas inlet, connected to the incineration channel to introduce waste gas; a smoke outlet, connected to the incineration channel to discharge smoke generated after high-temperature decomposition of the waste gas; and a heat exchange mechanism, comprising a plurality of heat exchange tubes with smoke channels, and a cold air channel formed on the outer peripheral side of the heat exchange tube, the two ends of the cold air channel are respectively connected to the waste gas inlet and the incineration channel, and the two ends of the smoke channel are respectively connected to the incineration channel and the smoke outlet; the first furnace body comprises an incineration part arranged at one end of the incineration channel along the extension direction of the incineration channel, and a smoke outlet part arranged at the other end of the incineration channel away from the incineration part; the waste gas in the cold air channel enters the incineration channel through the incineration part to be decomposed through the incineration part and the incineration channel, and the smoke generated in the incineration channel after the decomposition enters the smoke channel through the smoke outlet part.

Description

Technical Field

[0001] This invention belongs to the field of waste gas incineration technology and relates to a waste gas incineration system. Background Technology

[0002] Industries that use organic solvents, such as surface coating, paint manufacturing, oil refining, petrochemicals, synthetic leather manufacturing, and tape manufacturing, all generate waste gas containing volatile organic compounds, which has a serious negative impact on air quality.

[0003] In industry, the common practice is to decompose waste gas, which has already been treated by a waste gas pretreatment system, at high temperatures. The resulting flue gas (carbon dioxide and water vapor) is then released into the atmosphere. Currently, regenerative thermal oxidizers are used in industry for this high-temperature decomposition of waste gas.

[0004] Regenerative thermal oxidizers utilize the heat absorption and release processes of ceramic regenerator materials to recover waste heat. While this reduces some fuel consumption, they are bulky and the waste gas cannot be fully decomposed. In view of this, the inventors proposed this invention. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a waste gas incineration system that solves the technical issues of regenerative thermal oxidizers being bulky and waste gas not being fully decomposed.

[0006] This invention is implemented as follows: a waste gas incineration system includes: a first furnace body having an incineration channel for decomposing waste gas; a waste gas inlet connected to the incineration channel to introduce waste gas; a flue gas outlet connected to the incineration channel to discharge flue gas generated after the waste gas has been decomposed at high temperature; and a heat exchange mechanism including a plurality of heat exchange tubes having flue gas channels and a cold gas channel formed on the outer periphery of the heat exchange tubes, the two ends of the cold gas channel being connected to the waste gas inlet and the incineration channel respectively, and the two ends of the flue gas channel being connected to the incineration channel and the flue gas outlet respectively, so as to transfer the heat of the flue gas to the waste gas in the cold gas channel; the first furnace body includes an incineration section disposed at one end of the incineration channel along the extension direction of the incineration channel, and a flue gas outlet section disposed at the other end of the incineration channel away from the incineration section; the waste gas in the cold gas channel enters the incineration channel through the incineration section to achieve decomposition through the incineration section and the incineration channel, and the flue gas generated after decomposition in the incineration channel enters the flue gas channel through the flue gas outlet section.

[0007] Preferably, the waste gas incineration system includes a second furnace body arranged around the periphery of the first furnace body, and a hot waste gas passage formed on the periphery of the first furnace body, the two ends of which are respectively connected to the cold gas passage and the incineration section.

[0008] Preferably, the second furnace body covers the outer periphery of the first furnace body to form a hot exhaust gas passage sandwiched between the first furnace body and the second furnace body. The first furnace body is provided with a flame stabilizing mechanism located at the end of the incineration section. The hot exhaust gas passage includes an air inlet passage sandwiched between the flame stabilizing mechanism and the second furnace body. The exhaust gas in the air inlet passage passes through the flame stabilizing mechanism and enters the incineration passage.

[0009] Preferably, the second furnace body is provided with a gas inlet, and the gas entering the air intake channel from the gas inlet is ignited and burned by a burner located in the air intake channel.

[0010] Preferably, a windbreak mechanism is provided along the path from the incineration section to the flue gas outlet section to cause the exhaust gas to flow in the opposite direction to the incineration section so that the exhaust gas can be fully decomposed.

[0011] Preferably, the wind-blocking mechanism includes: a first wind-blocking member having a first fan supported on a first furnace body, the first fan rotating under the impetus of an airflow flowing from the incineration section to the flue gas outlet to cause the exhaust gas to flow in the reverse direction toward the incineration section; and a second wind-blocking member having a second fan supported on the first furnace body, the second fan rotating under the impetus of an airflow flowing from the incineration section to the flue gas outlet to cause the exhaust gas to flow in the reverse direction toward the incineration section; viewed from the axial direction of the first furnace body, the radial dimension of the second fan is greater than the radial dimension of the extended first fan; along the extension direction of the incineration channel, the second fan is disposed between the first fan and the flue gas outlet.

[0012] Preferably, the first furnace body includes: a first shell; a ceramic fiber insulation layer disposed on the inner periphery of the first shell to isolate the temperature of the combustion channel; and a backing layer sandwiched between the first shell and the ceramic fiber insulation layer.

[0013] Preferably, the heat exchange mechanism includes a cylindrical body enclosing a heat exchange chamber, a first support plate for closing one end of the cylindrical body, and a second support plate for closing the other end of the cylindrical body; each of the heat exchange tubes sequentially passes through the first support plate, the heat exchange chamber, and the second support plate to be supported on the first support plate and the second support plate; the heat exchange tubes divide the heat exchange chamber into the flue gas passage and the cold air passage.

[0014] Preferably, the cylinder has an exhaust gas inlet and an exhaust port for connecting the hot exhaust gas passage, and the exhaust ports are arranged at intervals along the circumference of the cylinder.

[0015] Preferably, at least a portion of the cylindrical body covers the second furnace body along the extension direction of the heat exchange tube; wherein the exhaust port covers the second furnace body.

[0016] Preferably, the heat exchange mechanism includes a baffle member that supports each of the heat exchange tubes and is disposed on the extension path of the cold air passage. The baffle member includes a plurality of baffles that are supported on the cylinder and spaced apart along the extension direction of the heat exchange tubes. Viewed from the extension direction of the heat exchange tubes, each of the baffles blocks part of the cold air passages and the baffles are arranged alternately in the circumferential direction so that the exhaust gas can flow in the direction pointing towards the tube wall of the heat exchange tube along the extension direction of the heat exchange tubes.

[0017] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0018] The waste gas incineration system provided by this invention includes a heat exchange mechanism and a first furnace body for incinerating and decomposing waste gas. The flue gas passage of the heat exchange mechanism is connected to the flue gas outlet at one end of the first furnace body, and its cold gas passage is connected to the incineration section at the other end of the first furnace body away from the flue gas outlet. After the waste gas is heated by heat exchange at the heat exchange mechanism, it can be fully incinerated by the incineration section when it enters the incineration passage. The heated waste gas can be rapidly incinerated when it passes through the incineration section. All waste gas entering the incineration passage needs to pass through the incineration section, thereby improving the waste gas decomposition rate. In addition, some waste gas that is not fully decomposed can be decomposed at high temperature after entering the incineration passage. This structure solves the technical problems of existing regenerative incinerators being too bulky and unable to fully decompose waste gas, thereby achieving the goal of fully decomposing waste gas. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the waste gas incineration system of the present invention.

[0020] Figure 2 This is a schematic diagram of the waste gas incineration mechanism of the present invention.

[0021] Figure 3 This is a schematic diagram of the waste gas incineration mechanism with a windbreak mechanism according to the present invention.

[0022] Figure 4 This is a schematic diagram of the flame stabilizing mechanism, the first furnace body, and the second furnace body of the present invention.

[0023] Figure 5 The diagram shows the structure of the second windbreak component, the first furnace body, and the second furnace body of the present invention.

[0024] Figure 6 This is a schematic diagram of the heat exchange mechanism of the present invention.

[0025] Figure 7 For the present invention from Figure 6 A schematic diagram of the structure observed at point CC in the heat exchange mechanism.

[0026] Figure 8 For the present invention from Figure 6 A schematic diagram of the structure observed at point DD in the heat exchange mechanism.

[0027] Attached Figure Labels

[0028] 1. First furnace body; 11. Combustion channel; 111. Combustion section; 12. Flame stabilization mechanism; 2. Second furnace body; 21. Warm exhaust gas channel; 211. Inlet channel; 22. Heat insulation component; 221. Gas inlet; 23. Support pad; 24. Explosion-proof port; 3. Heat exchange mechanism; 31. Exhaust gas inlet; 32. Exhaust port; 33. Cylinder; 331. First main body; 332. Second main body; 333. Expansion section; 34. Baffle component; 341. Baffle plate; 35. Heat exchange tube; 351. Flue gas channel; 36. Heat exchange chamber; 37. Cold air channel; 38. First support plate; 39. Second support plate; 4. Wind baffle mechanism; 41. First wind baffle component; 42. Second wind baffle component; 421. Second fan; 422. Second fixing component; 5. Flue gas outlet. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] First embodiment:

[0033] In a first embodiment, the present invention provides a waste gas incineration system comprising a first furnace body 1, a waste gas inlet 31, a flue gas outlet 5, and a heat exchange mechanism 3. The first furnace body 1 has an incineration channel 11 for decomposing waste gas, and the waste gas inlet 31 connects to the incineration channel 11 to introduce waste gas. The flue gas outlet 5 connects to the incineration channel 11 to discharge flue gas generated after the waste gas has been decomposed at high temperature. The heat exchange mechanism 3 includes a plurality of heat exchange tubes 35 with delay channels, and a cold air channel 37 formed on the outer periphery of the heat exchange tubes 35. In this embodiment, the first furnace body 1 extends axially, i.e., the incineration channel 11 extends axially. Along the axial extension direction, the first furnace body 1 includes an incineration section 111 located at one end of the incineration channel 11, and a flue gas outlet section located at the other end of the incineration channel 11 away from the incineration section 111. The flue gas outlet section is connected to one end of the heat exchange mechanism 3 to communicate with the flue gas channel 351. The waste gas enters the cold air passage 37 through the waste gas inlet 31. In the cold air passage 37, the waste gas heats up upon contact with the wall of the heat exchange tube 35, and then enters the combustion passage 111 through the combustion section 111. The heated waste gas is rapidly burned as it passes through the combustion section 111. Since all waste gas entering the combustion passage 111 must pass through the combustion section 111, the waste gas decomposition rate is improved. Furthermore, some waste gas that is not fully decomposed can be decomposed at high temperatures after entering the combustion passage 11. This structure solves the technical problems of existing regenerative incinerators being too bulky and unable to fully decompose waste gas, thus achieving the goal of fully decomposing the waste gas. The high-temperature flue gas generated after decomposition flows from the flue gas outlet into the flue gas passage 351, achieving heat exchange, and is then discharged through the flue gas passage 351 and the flue gas outlet 5.

[0034] Preferably, the waste gas incineration system further includes a second furnace body 2 arranged around the outer periphery of the first furnace body 1, and a hot waste gas passage 21 formed on the outer periphery of the first furnace body 1, the two ends of the hot waste gas passage 21 being connected to the cold gas passage 37 and the incineration section 111, respectively. In this embodiment, the second furnace body 2 covers the outer periphery of the first furnace body 1 to form the hot waste gas passage 21 sandwiched between the first furnace body 1 and the second furnace body 2. A flame stabilizing mechanism 12 is disposed on the first furnace body 1, located in the incineration section 111, specifically at the end of the incineration section 111 furthest from the flue gas outlet 5 (i.e., at the end of the incineration passage 11). The hot waste gas passage 21 includes an air inlet passage 211, sandwiched between the end of the incineration passage 11 furthest from the flue gas outlet 5 and the end of the second furnace body 2. The heated exhaust gas needs to flow into the intake channel 211 so that it can pass through the flame stabilizing mechanism 12 and be burned there. A gas inlet 221 is provided at the end of the second furnace body 2 (i.e., opposite the position of the combustion mechanism), from which gas can be introduced. A burner is installed in the intake channel 211 to ignite the gas, causing it to burn. Under the control of the flame stabilizer, the flame is directed towards the flue gas outlet to form a combustion section 111 on the combustion channel 11, thereby ensuring that the exhaust gas is fully burned as it passes through.

[0035] Second embodiment:

[0036] In a second embodiment, the present invention provides a waste gas incineration mechanism, which includes a first furnace body 1, a waste gas inlet 31, and a flue gas outlet 5. The first furnace body 1 has an incineration channel 11 for decomposing waste gas, and the waste gas inlet 31 is connected to the incineration channel 11 to introduce waste gas. The flue gas outlet 5 is connected to the incineration channel 11 to discharge the flue gas generated after the waste gas is decomposed at high temperature. In this embodiment, the first furnace body 1 extends axially, that is, the incineration channel 11 extends axially. Along the axial extension direction, the first furnace body 1 includes an incineration section 111 located at one end of the incineration channel 11, and a flue gas outlet section located at the other end of the incineration channel 11 away from the incineration section 111. The flue gas outlet section is used to connect to the flue gas outlet 5. The waste gas can be rapidly incinerated as it passes through the incineration section 111. All waste gas entering the incineration channel 11 must pass through the incineration section 111, thus improving the waste gas decomposition rate. Furthermore, some waste gas that is not fully decomposed can be decomposed at high temperatures after entering the incineration channel 11. This structure solves the technical problems of existing regenerative thermal oxidizers being too bulky and unable to fully decompose waste gas, thereby achieving the goal of ensuring sufficient decomposition of waste gas. The high-temperature flue gas generated after decomposition flows from the flue gas outlet into the flue gas channel 351, thereby achieving heat exchange, and can then be discharged through the flue gas channel 351 and the flue gas outlet 5.

[0037] Preferably, the waste gas incineration system further includes a second furnace body 2 surrounding the outer periphery of the first furnace body 1, and a hot waste gas passage 21 formed on the outer periphery of the first furnace body 1, the two ends of which are respectively connected to the waste gas inlet 31 and the incineration section 111. In this embodiment, the second furnace body 2 covers the outer periphery of the first furnace body 1 to form the hot waste gas passage 21 sandwiched between the first furnace body 1 and the second furnace body 2. A flame stabilizing mechanism 12 is disposed on the first furnace body 1, located in the incineration section 111, specifically at the end of the incineration section 111 furthest from the flue gas outlet 5 (i.e., at the end of the incineration passage 11). The hot waste gas passage 21 includes an air inlet passage 211, which is sandwiched between the end of the incineration passage 11 furthest from the flue gas outlet 5 and the end of the second furnace body 2. The heated exhaust gas needs to flow into the intake channel 211 so that it can pass through the flame stabilizing mechanism 12 and be burned there. A gas inlet 221 is provided at the end of the second furnace body 2 (i.e., opposite the position of the combustion mechanism), from which gas can be introduced. A burner is installed in the intake channel 211 to ignite the gas, causing it to burn. Under the control of the flame stabilizer, the flame is directed towards the flue gas outlet to form a combustion section 111 on the combustion channel 11, thereby ensuring that the exhaust gas is fully burned as it passes through.

[0038] Other features not mentioned in the second embodiment can be the same as those in the first embodiment, and the modified implementation methods and their beneficial effects can also be the same as those in the first embodiment, so they will not be described again.

[0039] Third embodiment:

[0040] In the third embodiment, the waste gas incineration system provided by the present invention further includes a baffle mechanism 4, which is disposed on the incineration channel 11, specifically between the incineration section 111 and the flue gas outlet. The baffle mechanism 4 causes the waste gas to flow counter-currently in the direction pointing towards the incineration section 111, so that the waste gas can be fully decomposed in the incineration channel 11 or after being fully incinerated in the incineration section 111. Specifically, in this embodiment, the baffle mechanism 4 includes a first baffle member 41 and a second baffle member 42. The first baffle member 41 includes a first fan supported on the first furnace body 1, and the second baffle member 42 includes a second fan 421 supported on the first furnace body 1. The first fan and the second fan 421 can rotate under the push of the airflow flowing from the incineration section 111 to the flue gas outlet. The rotating first fan can disperse the waste gas and the flue gas, so that the waste gas flows counter-currently towards the incineration section 111 under the wind force of the fan, and the flue gas (water vapor and carbon dioxide) continues to flow towards the flue gas outlet under the pressure difference of the gas flow.

[0041] In the third embodiment, viewed axially from the first furnace body 1, the radial dimension of the second fan 421 is larger than the radial dimension of the first fan. Furthermore, along the extension direction of the combustion channel 11, the second fan 421 is positioned between the first fan and the flue gas outlet. That is, along the gas flow direction, the first fan is positioned close to the combustion section 111. The smaller radial dimension of the first fan provides some resistance to the exhaust gas and prevents excessive backflow of exhaust gas. Further, the second fan 421, with a radial dimension larger than the first fan, is positioned along the gas flow direction. This allows the exhaust gas that did not flow back at the first fan to be dispersed at the second fan 421, and the greater resistance generated by the second fan 421 causes the exhaust gas to flow back to the combustion section 111 for complete combustion. Specifically, by initially setting a first fan with a relatively small diameter, the gas mixture of exhaust gas, carbon dioxide, and water vapor can be dispersed at the first fan, and the reverse resistance experienced by the gas mixture is not too large. This prevents the flame at the combustion section 111 from experiencing reverse combustion due to excessive reverse resistance. Furthermore, a second fan 421 with a radial dimension larger than the first fan is arranged behind the first fan along the airflow path. This second fan works in conjunction with the first fan to allow the insufficiently decomposed exhaust gas to flow in reverse, thus achieving the purpose of complete decomposition.

[0042] The first windbreak member 41 includes a first support frame for mounting the first fan. The first support frame has a first fixing member supported on the peripheral wall of the combustion channel 11 for fixing the first fan. The first fixing member is an elongated structure on which the fan is mounted, and one end of the first fixing member is fixed to the first furnace body 1. Preferably, the first support frame includes two first fixing members configured in a cross structure, with both ends of each first fixing member fixed to the first furnace body 1. This fixing method prevents the first fan from loosening or shifting under airflow pressure.

[0043] The second windbreak member 42 includes a second support frame for mounting the second fan 421. The second support frame has a second fixing member 422 supported on the peripheral wall of the combustion channel 11 for fixing the second fan 421. The second fixing member 422 is an elongated structure on which the fan is mounted, and one end is fixed to the first furnace body 1. Preferably, the second support frame includes two second fixing members 422, which are configured in a cross structure, with both ends of each second fixing member 422 fixed to the first furnace body 1. This fixing method prevents the second fan 421 from loosening or shifting under airflow pressure.

[0044] The first furnace body 1 includes a first shell, a ceramic fiber insulation layer, and a backing layer sandwiched between the first shell and the ceramic fiber insulation layer. The ceramic fiber insulation layer concentrates the temperature within the combustion channel 11, preventing it from leaking into the hot exhaust gas channel 21, thus solving the technical problem of insufficient decomposition of exhaust gas due to uneven temperature distribution. In a preferred embodiment, the first shell is made of rolled steel plate to fix and support the ceramic fiber insulation layer and the backing layer, which is composed of a ceramic fiber blanket. Preferably, the thickness of the ceramic fiber insulation layer is 240mm–320mm, and the thickness of the backing layer is 20mm–60mm, preventing heat loss within the combustion channel 11. In a preferred embodiment, the thickness of the ceramic fiber insulation layer is 305mm, and the backing layer is 25mm, reducing the deformation of the first shell and decreasing the overall thickness of the first furnace body 1.

[0045] In this embodiment, the second furnace body 2 is made of rolled steel plate. Preferably, the second furnace body 2 is made of 8mm thick steel plate.

[0046] Preferably, a plurality of support rings are arranged on the combustion channel 11, each support ring being supported on the inner peripheral wall of the first furnace body 1, that is, on the inner peripheral wall of the ceramic fiber insulation layer, so as to prevent the first furnace body 1 from deforming and to support the insulation layer. It is understood that the support rings are arranged at intervals along the extension direction of the combustion channel 11.

[0047] Preferably, a support pad 23 is provided in the hot exhaust gas channel 21 for respectively abutting against the first furnace body 1 and the second furnace body 2. The support pad 23 is sandwiched between the first furnace body 1 and the second furnace body 2 to keep their relative positions fixed and to prevent deformation of the second furnace body 2. A plurality of support pads 23 are spaced apart on the circumference of the first furnace body 1, and multiple sets of support pads 23 are spaced apart along the extending direction of the first furnace body 1.

[0048] Preferably, a heat insulation member 22 is disposed at the end of the second furnace body 2. The heat insulation member 22 includes a first baffle, a second baffle, and insulation cotton sandwiched between the first baffle and the second baffle. An air inlet channel 211 is sandwiched between the heat insulation member 22 and the flame stabilizing mechanism 12. The heat insulation member 22 has a gas inlet 221 for introducing gas. Preferably, the thickness of the insulation cotton is not less than 500 mm, so that when the gas burns at the air inlet channel 211, the temperature will not dissipate too quickly from the end of the second furnace body 2. In this embodiment, the first baffle and the second baffle are made of steel plates. In a preferred embodiment, the thickness of the insulation cotton is between 700 mm and 800 mm, so that the heat insulation member 22 can support the instantaneous increase in expansion pressure during combustion at the air inlet channel 211.

[0049] Preferably, an explosion-proof opening 24 is provided on the second furnace body 2, wherein the explosion-proof opening 24 is located in the circumferential direction of the second furnace body 2 and close to the air inlet channel 211.

[0050] Other features not mentioned in the third embodiment may be the same as those in the first and / or second embodiments, and the modified implementation methods and their beneficial effects may also be the same as those in the first and / or second embodiments, so they will not be described again.

[0051] Fourth embodiment:

[0052] In the fourth embodiment, the heat exchange mechanism 3 of the present invention includes a cylindrical body 33, a first support plate 38, a second support plate 39, and heat exchange tubes 35 passing through the first support plate 38 and the second support plate 39. The first support plate 38 and the second support plate 39 are used to close both ends of the cylindrical body 33 in its extending direction and support both ends of each heat exchange tube 35 on the cylindrical body 33. The heat exchange tube 35 has a heat exchange chamber 36 enclosed by the cylindrical body 33 along its channel, and the tube wall of the heat exchange tube 35 divides it into a flue gas channel 351 and a cold air channel 37. In this embodiment, the first support plate 38 is also used to close the flue gas outlet of the first furnace body 1, so that the flue gas can flow through the heat exchange tubes 35. An exhaust gas inlet 31 is provided on the circumferential wall of the cylinder 33, allowing the exhaust gas to enter the heat exchange chamber 36 radially. This ensures the exhaust gas flows towards the wall of the heat exchange tube 35, allowing it to radially flush the tube and more effectively remove heat. An exhaust port 32 is provided circumferentially on the cylinder 33, spaced apart along its circumference. The exhaust ports 32 are enclosed within the second furnace body 2, thus connecting to the hot exhaust gas channel 21. In this embodiment, the second furnace body 2 encloses the outer periphery of the first furnace body 1 and also the outer periphery of the cylinder 33 of the heat exchange mechanism 3.

[0053] The heat exchange mechanism 3 also includes a baffle member 34, which is disposed on the extension path of the cold air passage 37 to change the flow direction of the exhaust gas and support each of the heat exchange tubes 35. The baffle member 34 includes a plurality of baffle plates 341 supported on the cylinder 33 and spaced apart along the extension direction of the heat exchange tubes 35. Viewed from the extension direction of the heat exchange tubes 35, one baffle plate 341 blocks part of the cold air passage 37. Specifically, in this embodiment, the cross-section of the cylinder 33 is circular, and the baffle plate 341 is configured as a semi-circular structure, fixedly supported on the cylinder 33. The heat exchange tubes 35 pass through the baffle plate 341 and are supported on the cylinder 33 by the baffle plate 341 to prevent the heat exchange tubes 35 from deforming or displacing due to the scouring of the exhaust gas. It is understood that in other embodiments, the baffle plate 341 can be part of a circular structure; of course, the part that is connected and fixed to the cylinder 33 can be an arc-shaped structure. In other embodiments, the cross-section of the cylinder 33 can be a polygonal structure, such as a rectangle, a square, or a regular polygon, and the position where the baffle 341 connects to the cylinder 33 is a contoured structure of the cross-section of the cylinder 33.

[0054] In this embodiment, viewed from the extension direction of the heat exchange tube 35, each of the baffles 341 partially blocks the cold air passage 37, and the baffles 341 are alternately arranged circumferentially. Combined with their spaced arrangement along the extension direction of the cylinder 33, this allows the exhaust gas to flow in the direction pointing towards the wall of the heat exchange tube 35 along its extension direction. Specifically, the exhaust gas can flow through the position not blocked by the baffles 341. In this embodiment, the two baffles 341 are arranged opposite each other, so that the path of the exhaust gas after entering the cylinder 33 is an S-shaped path (i.e., a curved path), which enables the exhaust gas to radially flush the heat exchange tube 35, allowing it to make more full contact with the heat exchange tube 35 and quickly remove the heat from the heat exchange tube 35. The exhaust port 32 is opened between the first support plate 38 and the baffle 341 near the first support plate 38. In this embodiment, along the extension direction of the heat exchange tube 35, the baffle 341 divides the heat exchange chamber 36 into three parts. The baffle 341 ensures that the exhaust gas flows radially across the wall of the heat exchange tube 35 in each part. In the prior art, the exhaust gas flows essentially parallel to the heat exchange tube 35. Therefore, the exhaust gas cannot fully contact the wall of the heat exchange tube 35, thus failing to effectively remove heat. This application achieves the goal of both further supporting each heat exchange tube 35 and ensuring that the exhaust gas fully contacts the wall of the heat exchange tube 35 to quickly remove its heat through the baffle. It is understood that in other embodiments, multiple baffles 341 can be arranged, with two adjacent baffles 341 facing each other.

[0055] Preferably, viewed from the extension direction of the heat exchange tube 35, the baffles 341 are arranged in a staggered circumferential configuration, and in combination with the spaced configuration along the extension direction of the cylinder 33, so that the exhaust gas can flow in the direction pointing towards the wall of the heat exchange tube 35 along the extension direction of the heat exchange tube 35. That is, the flow path of the exhaust gas is configured as a curved path, so that the exhaust gas can radially flush the heat exchange tube 35, allowing it to make more full contact with the heat exchange tube 35 and achieve the purpose of quickly removing the heat from the heat exchange tube 35.

[0056] Other features not mentioned in the fourth embodiment may be the same as those in the first, second and / or third embodiments, and the modified implementation methods and their beneficial effects may also be the same as those in the first, second and / or third embodiments, so they will not be described again.

[0057] Fifth embodiment:

[0058] In the fifth embodiment, the cylinder 33 of the present invention includes a first main body 331 and an expansion portion 333. The first main body 331 extends along the extension direction of the heat exchange tube 35, and the expansion portion 333 is fixed to the end of the first main body 331 along the extension direction of the heat exchange tube 35. The expansion portion 333, which is corrugated, can elastically compress or elastically elongate along the extension direction of the heat exchange tube 35 when subjected to force. Each heat exchange tube 35 expands when heated, and the expansion portion 333 is configured as a corrugated structure so that it can elastically deform along the extension direction of the heat exchange tube 35 when it expands, thereby solving the technical problem that each heat exchange tube 35 expands when heated, which may cause it to elongate along the extension direction of the heat exchange tube 35 and crack the first support plate 38, the second support plate 39, or the cylinder 33. Preferably, the expansion portion 333 includes two slope peaks along the extension direction of the heat exchange tube 35. It is understood that in other embodiments, the expansion portion 333 includes one or more slope peaks.

[0059] In a preferred embodiment, the cylindrical body 33 of the present invention further includes a second main body 332, and the expansion portion 333 is sandwiched between the first main body 331 and the second main body 332. The first main body 331 has a first support plate 38 connected to one end away from the expansion portion 333, and the second main body 332 has a second support plate 39 connected to one end away from the expansion portion 333. The expansion portion 333 is positioned close to the second support plate 39. It is understood that in this embodiment, the temperature at the position near the second support plate 39 on the heat exchange mechanism 3 is the lowest, preventing the expansion portion 333 from being affected by the temperature of the heated exhaust gas or high-temperature flue gas. Simultaneously, the expansion portion 333 solves the technical problem of cracking between the heat exchange tubes 35 (first support plate 38 and / or second support plate 39) and the cylindrical body 33 when the expansion rates of the cylindrical body 33 and each heat exchange tube 35 differ due to thermal expansion, resulting in different lengths of thermal expansion.

[0060] Preferably, the waste gas incineration system of the present invention further includes a low-temperature flue gas discharge mechanism, which has a low-temperature flue gas discharge channel communicating with the flue gas channel 351. The low-temperature flue gas discharge mechanism is connected to the heat exchange mechanism 3 at one end away from the waste gas incineration mechanism. In this embodiment, the low-temperature flue gas discharge mechanism, the heat exchange mechanism 3, and the waste gas incineration mechanism are arranged sequentially. The low-temperature flue gas discharge mechanism has a low-temperature flue gas outlet.

[0061] Preferably, the incineration system of the present invention can use an exhaust fan to draw the low-temperature flue gas from the low-temperature flue gas discharge mechanism out of the flue gas outlet 5. It is understood that the low-temperature flue gas in the present invention includes carbon dioxide and water vapor.

[0062] Other features not mentioned in the fifth embodiment may be the same as those in the first, second, third and / or fourth embodiments, and the modified implementation methods and their beneficial effects may also be the same as those in the first, second, third and / or fourth embodiments, so they will not be described again.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A waste gas incineration system, comprising: The first furnace body has a combustion channel for decomposing waste gas; An exhaust gas inlet, connected to the incineration channel to introduce exhaust gas; A smoke outlet, connected to the incineration channel to discharge smoke generated by high-temperature decomposition of the waste gas; as well as The heat exchange mechanism comprises a plurality of heat exchange tubes having flue gas channels, and a cold air channel formed on the outer peripheral side of the heat exchange tubes, wherein the two ends of the cold air channel are respectively connected to the exhaust gas inlet and the incineration channel, and the two ends of the flue gas channel are respectively connected to the incineration channel and the flue gas outlet, so as to transfer the heat of the flue gas to the exhaust gas in the cold air channel; It is characterized in that The first furnace body comprises a combustion part arranged at one end of the combustion channel along the extending direction of the combustion channel, and a smoke outlet part arranged at the other end of the combustion channel away from the combustion part; the exhaust gas of the cold air channel enters the combustion channel through the combustion part to be decomposed through the combustion part and the combustion channel, and the smoke generated in the combustion channel after decomposition enters the smoke channel through the smoke outlet part; wherein a wind shielding mechanism is arranged on the path from the combustion part to the smoke outlet part, for making the exhaust gas flow back in the direction pointing to the combustion part so that the exhaust gas can be fully decomposed; the wind shielding mechanism comprises: A first wind shielding member has a first fan supported on the first furnace body, the first fan rotates under the impetus of the airflow flowing from the combustion part to the smoke outlet part so as to make the exhaust gas flow back in the direction pointing to the combustion part; and The second wind shielding member has a second fan supported on the first furnace body, and the second fan rotates under the impetus of the airflow flowing from the combustion part to the smoke outlet part so that the exhaust gas flows back in the direction pointing to the combustion part; When viewed from the axial direction of the first furnace body, the radial dimension of the second fan is larger than the radial dimension of the first fan; Along the extension direction of the combustion channel, the second fan is arranged between the first fan and the smoke outlet; the first furnace body comprises: a first shell; A ceramic fiber insulation layer is disposed on the inner circumference of the first shell to isolate the temperature of the combustion channel; The backing layer is sandwiched between the first shell and the ceramic fiber insulation layer.

2. A waste gas incineration system according to claim 1, characterized in that: It comprises a second furnace body arranged around the outer periphery of the first furnace body, and a warm exhaust gas channel formed on the outer periphery of the first furnace body, wherein both ends of the warm exhaust gas channel are connected to the cold air channel and the incineration part respectively.

3. A waste gas incineration system according to claim 2, characterized in that: The second furnace body is covered on the outer peripheral side of the first furnace body to form a warm exhaust gas channel sandwiched between the first furnace body and the second furnace body. The first furnace body is provided with a flame stabilizing mechanism located at the end of the incineration section. The warm exhaust gas channel includes an air intake channel sandwiched between the flame stabilizing mechanism and the second furnace body. The exhaust gas in the air intake channel passes through the flame stabilizing mechanism and enters the incineration channel.

4. A waste gas incineration system according to claim 3, characterized in that: The second furnace body is provided with a gas inlet, and the gas entering the gas inlet passage from the gas inlet is ignited and burned by a burner arranged at the gas inlet passage.

5. A waste gas incineration system according to any one of claims 2 to 4, characterized in that: The heat exchange mechanism includes a cylinder surrounding a heat exchange chamber, a first support plate for closing one end of the cylinder, and a second support plate for closing the other end of the cylinder; each of the heat exchange tubes sequentially passes through the first support plate, the heat exchange chamber, and the second support plate to be supported on the first support plate and the second support plate; the heat exchange tubes divide the heat exchange chamber into the smoke channel and the cold air channel.

6. A waste gas incineration system according to claim 5, characterized in that: The cylinder is provided with the exhaust gas inlet and an exhaust port for communicating with the warm exhaust gas channel, and the exhaust ports are arranged at intervals along the circumference of the cylinder; Along the extension direction of the heat exchange tube, at least a portion of the cylinder is covered in the second furnace body; wherein the exhaust port is covered in the second furnace body.

7. A waste gas incineration system according to claim 6, characterized in that: The heat exchange mechanism includes a deflection component arranged on the extension path of the cold air channel to support each of the heat exchange tubes, and the deflection component includes a plurality of deflection plates supported on a cylinder and arranged at intervals along the extension direction of the heat exchange tube; when observed from the extension direction of the heat exchange tube, each of the deflection plates blocks a portion of the cold air channel and each of the deflection plates is alternately arranged along the circumferential direction so that the exhaust gas can flow in the direction pointing to the tube wall of the heat exchange tube along the extension direction of the heat exchange tube.

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