Exhaust gas incinerator

Abstract

The utility model relates to a waste gas incinerator belongs to the technical field of waste gas treatment equipment, it adopts the double -deck structure of shell and combustion chamber inner bag, low -temperature waste gas first enters the interlayer preheating and cools down the inner bag, enters the inner bag core to be incinerated again, the inner bag export is provided with fire baffle and baffle to make waste gas mix evenly, the furnace body is provided with corrugated expansion joint and movable support and absorbs thermal expansion, the double -deck structure of the utility model can effectively prevent the furnace body over -temperature damage, reduce the weight, save the cost and guarantee the processing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to a waste gas incinerator. Background Technology

[0002] With the development of technology in the field of environmental protection, direct combustion (TO) waste gas treatment technology has emerged. This technology has the characteristics of high treatment efficiency and wide applicability, which has led to the development of related devices such as waste gas incinerators.

[0003] In related technologies, waste gas incinerators treat volatile organic compounds (VOCs) through high-temperature combustion, and the core area of ​​the furnace body is constructed with refractory materials such as refractory bricks to maintain the stability of the combustion process.

[0004] However, the aforementioned waste gas incinerators still have problems such as the core area of ​​the furnace body being easily damaged and collapsed due to exceeding the limit temperature. At the same time, the outer shell and the inner liner of the combustion chamber are prone to deformation due to thermal expansion at high temperatures, and the high-temperature flames are easily carried away by the waste gas at the combustion chamber outlet, affecting the processing efficiency and equipment lifespan. Moreover, refractory materials such as refractory bricks result in a large furnace weight and high cost. Utility Model Content

[0005] In response to the shortcomings of the existing production technology, the applicant provides a waste gas incinerator that, based on a double-layer structure, can protect the inner liner of the combustion chamber from overheating and damage by using low-temperature flue gas. Moreover, the refractory materials such as refractory bricks used in traditional incinerators can be eliminated from the combustion chamber, thereby reducing the weight of the furnace and saving costs.

[0006] The technical solution adopted in this utility model is as follows: A waste gas incinerator includes a furnace body assembly and a combustion assembly, wherein the combustion assembly is disposed on one side of the furnace body assembly; The furnace body assembly includes a shell and a combustion chamber liner disposed inside the shell and coaxially arranged with the shell. A first cavity is formed between the shell and the combustion chamber liner, and a second cavity is formed inside the combustion chamber liner; The first cavity is closed at the end away from the combustion assembly by an annular plate, and a flue gas inlet for low-temperature flue gas to flow in is opened on the side wall; Multiple through holes for flue gas inflow are provided on the side wall of the combustion chamber near the combustion assembly; The combustion chamber liner is provided with a fire cone and a baffle plate in sequence on the rear side away from the combustion components; A flue gas outlet is provided on the rear side of the baffle plate.

[0007] As a further improvement to the above technical solution: In one embodiment, at least one corrugated expansion joint is provided on both the housing and the combustion chamber liner.

[0008] In one embodiment, a sight glass is also provided at one end of the housing near the combustion assembly, with the observation end of the sight glass facing the combustion chamber liner.

[0009] In one embodiment, a furnace body insulation layer is provided around the periphery of the shell, and the furnace body insulation layer uses aluminum silicate needled blanket as the insulation material.

[0010] In one embodiment, an external frame is added to the furnace body assembly, which covers and protects the entire furnace body assembly and the furnace body insulation layer. At the same time, a frame insulation layer is arranged inside the frame, which is made of rock wool board.

[0011] In one embodiment, a ladder is provided on one side of the frame, and a platform is provided on the top of the frame, with the top of the ladder connected to one side of the platform.

[0012] In one embodiment, the platform is equipped with railings.

[0013] In one embodiment, the furnace body assembly is further provided with an explosion-proof door, which is located on one side of the flue gas outlet.

[0014] In one embodiment, a support assembly is disposed at the bottom of the housing, the support assembly including fixed supports on both sides and a movable support between the two fixed supports, the bottom of the movable support being provided with rollers.

[0015] In one embodiment, the combustion assembly includes a burner and a valve assembly matched with the burner.

[0016] The beneficial effects of this utility model are as follows: This invention features a compact, double-layered structure. Low-temperature exhaust gas first enters the interlayer (first cavity) between the outer shell and the inner combustion chamber, and then enters the core of the inner combustion chamber (second cavity) through the inner liner's through-holes. During this process, the low-temperature exhaust gas in the interlayer acts like a "cooling jacket," continuously cooling the inner combustion chamber and preventing the risk of burn-through, melting, or collapse due to excessively high local temperatures. This forms a thermal protection mechanism, significantly improving the service life of the core components and the overall safety of the equipment. Furthermore, this cooling process is also a preheating process. Before entering the core of the combustion chamber, the exhaust gas absorbs heat conducted from the inner liner in the interlayer, resulting in an initial temperature increase. This allows the exhaust gas to be heated to the temperature required for VOCs oxidation and decomposition more quickly upon entering the combustion chamber, reducing fuel consumption, improving thermal efficiency, and thus achieving energy savings.

[0017] This utility model also has the following advantages: Because of the protection of the low-temperature exhaust gas jacket, the working environment of the combustion chamber is improved. It no longer needs to rely on traditional heavy refractory bricks to resist extreme high temperatures. This allows the furnace body to be made of lighter metal materials (such as high-temperature resistant 310S stainless steel), reducing the overall weight of the equipment. This not only reduces material and manufacturing costs but also simplifies transportation and installation.

[0018] This utility model features corrugated expansion joints on the outer shell and the inner liner of the combustion chamber, and a movable support with rollers at the bottom of the furnace body. These features effectively absorb and compensate for the linear expansion and contraction caused by temperature changes during start-up, shutdown and operation of the equipment. This avoids structural deformation, weld cracking or component damage caused by thermal stress accumulation, and ensures the long-term stable operation of the equipment.

[0019] This invention features a fire-blocking cone and a baffle plate arranged sequentially at the combustion chamber outlet. The fire-blocking cone prevents the flame from directly reaching the outlet, ensuring sufficient residence time for combustion within the furnace. The baffle plate, by repeatedly changing the direction of flue gas flow, ensures thorough mixing and temperature equalization of the exhaust gas that may be unevenly heated within the combustion chamber. This guarantees that all harmful substances are uniformly heated to their decomposition temperature, thereby achieving a stable and high treatment efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 for Figure 1 Top view.

[0022] Figure 3 This is a schematic diagram of the thermal insulation frame structure of this utility model.

[0023] Figure 4 In order to be in Figure 3 A schematic diagram of the structure after installing the ladder and platform on the foundation.

[0024] The components are as follows: 100, furnace body assembly; 200, combustion assembly; 300, ring plate; 400, fire cone; 500, baffle plate; 600, explosion-proof door; 700, support assembly; 800, sight glass; 900, furnace body insulation layer; 1000, frame; 1100, frame insulation layer; 1200, ladder; 1300, platform; 1400, railing. 110. Shell; 120. Combustion chamber liner; 130. Flue gas inlet; 140. Flue gas outlet; 150. Corrugated expansion joint; 210. Burner; 220. Valve assembly; 710. Fixed support; 720. Movable support. Detailed Implementation

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0029] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0030] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0031] like Figures 1-4 The accompanying drawing shows a schematic diagram of the structure of a waste gas incinerator according to an embodiment of the present invention; for ease of description, the drawing only shows the structure related to the embodiment of the present invention.

[0032] This application provides a waste gas incinerator, mainly used for treating volatile organic compounds (VOCs) waste gas. It solves the problems of furnace body overheating, thermal deformation and low efficiency in the prior art through a double-layer structure design, including furnace body assembly 100 and combustion assembly 200.

[0033] In some embodiments, the combustion assembly 200 is disposed on one side of the furnace body assembly 100 to provide a high-temperature combustion environment; The furnace body assembly 100 includes a cylindrical shell 110 and a combustion chamber 120 coaxially disposed inside the shell 110; An annular first cavity is formed between the shell 110 and the combustion chamber liner 120, and a cylindrical second cavity is formed inside the combustion chamber liner 120; The first cavity is closed at the end away from the combustion assembly 200 by an annular plate 300, and a flue gas inlet 130 is opened on this side wall for the inflow of low-temperature flue gas. Multiple through holes are evenly opened on the side wall of the combustion chamber 120 near the combustion assembly 200, allowing flue gas to flow from the first chamber into the second chamber.

[0034] Furthermore, the combustion chamber liner 120 is provided with a conical flame deflector 400 and a perforated baffle 500 in sequence on the rear side away from the combustion assembly 200; The flame cone 400 is used to prevent flames from shooting out directly, and the baffle 500 is used to mix the exhaust gas; A flue gas outlet 140 is provided on the rear side of the baffle plate 500 for discharging the treated flue gas.

[0035] Understandably, to enhance safety, an explosion-proof door 600 is installed on one side of the flue gas outlet 140 to release overpressure inside the furnace.

[0036] In some embodiments, a support assembly 700 is disposed at the bottom of the housing 110, including fixed supports 710 located on both sides and a movable support 720 located between the fixed supports 710; wherein, the bottom of the movable support 720 is provided with rollers, allowing the housing 110 to move freely during thermal expansion. The fixed supports 710 are fixed by anchor bolts to ensure overall stability.

[0037] In some embodiments, a sight glass 800 is provided on one end of the housing 110 near the combustion assembly 200, with the observation end of the sight glass 800 facing the inner liner 120 of the combustion chamber, for real-time observation of the combustion status.

[0038] In some embodiments, the combustion assembly 200 includes a burner 210 and a valve group 220 matched with the burner 210, the valve group 220 controlling the fuel supply and the burner 210 generating a high-temperature flame.

[0039] It is understandable that, in order to cope with thermal expansion, corrugated expansion joints 150 are provided in the middle of the shell 110 and the end of the combustion chamber liner 120; the corrugated expansion joints 150 can absorb linear expansion and prevent structural deformation.

[0040] In some embodiments, a furnace insulation layer 900 is provided around the periphery of the shell 110, using aluminum silicate needled blanket as the insulation material to reduce heat loss; Furthermore, an external frame 1000 is added to the furnace body assembly 100, which covers and protects the entire furnace body assembly 100 and the furnace body insulation layer 900; a frame insulation layer 1100 is configured inside the frame 1000, which uses rock wool board to further enhance the heat insulation effect.

[0041] For ease of operation and maintenance, a ladder 1200 is installed on one side of the frame 1000, and a platform 1300 is installed on top of the frame 1000. The top of the ladder 1200 is connected to one side of the platform 1300, and a railing 1400 is installed on the platform 1300 to ensure safety.

[0042] The working process of this utility model is as follows: Low-temperature exhaust gas enters the first cavity from the flue gas inlet 130 and flows along the annular space toward the combustion assembly 200. During this process, the exhaust gas absorbs heat from the inner liner 120 of the combustion chamber, achieving preheating and cooling of the inner liner at the same time. Subsequently, the exhaust gas enters the second chamber through the through hole in the side wall of the combustion chamber 120, and is heated by the flame of the burner 210, where the VOCs are oxidized and decomposed. The high-temperature flue gas passes through the fire cone 400 and the baffle 500 in sequence. The fire cone 400 changes the flow field to prevent the flame from short-circuiting, and the baffle 500 promotes the mixing of flue gas to ensure uniform temperature. Finally, it is discharged from the flue gas outlet 140. Throughout the process, the corrugated expansion joint 150 and the movable support 720 compensate for thermal expansion, and the insulation layer reduces external heat loss.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A waste gas incinerator, characterized in that, It includes a furnace body assembly (100) and a combustion assembly (200), the combustion assembly (200) being disposed on one side of the furnace body assembly (100); The furnace body assembly (100) includes a shell (110) and a combustion chamber liner (120) disposed inside the shell (110) and coaxially disposed with the shell (110). A first cavity is formed between the shell (110) and the combustion chamber liner (120), and a second cavity is formed inside the combustion chamber liner (120); The first cavity is closed at the end away from the combustion assembly (200) by an annular plate (300), and a flue gas inlet (130) is opened on the side wall for the inflow of low-temperature flue gas. The combustion chamber liner (120) has multiple through holes on its side wall near the combustion assembly (200) for flue gas to flow in; The combustion chamber liner (120) is provided with a fire cone (400) and a baffle plate (500) in sequence on the rear side away from the combustion assembly (200). A flue gas outlet (140) is provided on the rear side of the baffle (500).

2. The waste gas incinerator according to claim 1, characterized in that, At least one corrugated expansion joint (150) is provided on both the housing (110) and the combustion chamber liner (120).

3. The waste gas incinerator according to claim 1, characterized in that, A sight glass (800) is also provided on one end of the housing (110) near the combustion assembly (200), with the observation end of the sight glass (800) facing the inner liner (120) of the combustion chamber.

4. The waste gas incinerator according to claim 1, characterized in that, A furnace body insulation layer (900) is provided around the periphery of the shell (110), and the furnace body insulation layer (900) uses aluminum silicate needled blanket as insulation material.

5. The waste gas incinerator according to claim 4, characterized in that, An external frame (1000) is added to the furnace body assembly (100), the frame (1000) covers and protects the entire furnace body assembly (100) and the furnace body insulation layer (900), and a frame insulation layer (1100) is arranged inside the frame (1000), the frame insulation layer (1100) is made of rock wool board.

6. The waste gas incinerator according to claim 5, characterized in that, A ladder (1200) is provided on one side of the frame (1000), and a platform (1300) is provided on the top of the frame (1000), with the top of the ladder (1200) connected to one side of the platform (1300).

7. The waste gas incinerator according to claim 6, characterized in that, The platform (1300) is equipped with railings (1400).

8. The waste gas incinerator according to claim 1, characterized in that, The furnace body assembly (100) is also provided with an explosion-proof door (600), which is located on one side of the flue gas outlet (140).

9. The waste gas incinerator according to claim 1, characterized in that, A support assembly (700) is disposed at the bottom of the housing (110). The support assembly (700) includes fixed supports (710) on both sides and a movable support (720) between the two fixed supports (710). The bottom of the movable support (720) is provided with rollers.

10. The waste gas incinerator according to claim 1, characterized in that, The combustion assembly (200) includes a burner (210) and a valve group (220) matched with the burner (210).

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