A mixed flow heat recovery device

Abstract

The utility model discloses a mixed flow heat recovery device relates to environmental protection equipment technical field, the utility model discloses a shell, insulating layer, mixed flow device and heat exchanger water route pipeline, the shell is used for forming equipment main body structure and airflow channel, and the insulating layer sets up in the inside heat insulation of shell, and the mixed flow device sets up in the shell body and is used for mixing high temperature flue gas and low temperature flue gas, and the heat exchanger water route pipeline sets up in the shell body and is used for with the heat exchange of mixed flue gas. The utility model integrates mixed flow device and heat exchanger in same shell body, has realized the integration function of " mixing cooling " and " heat recovery ", has effectively solved the problems, such as high equipment cost, large floor space, big energy consumption loss etc. in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection equipment technology, and in particular relates to a mixed flow heat recovery device. Background Technology

[0002] In the field of industrial waste gas treatment, RTO (Regenerative Thermal Oxidizer) equipment discharges two streams of waste gas with significant temperature differences during operation: one is high-temperature hot exhaust gas (temperatures can reach 900℃), and the other is low-temperature gas emitted normally (80-100℃). Current technologies typically require separate mixing and heat exchangers: the mixing unit mixes the high and low temperature waste gases, lowering the temperature of the high-temperature gas to prevent damage to downstream equipment; the heat exchanger recovers the waste heat from the waste gas and converts it into hot water for domestic use.

[0003] This separate setup has the following drawbacks:

[0004] 1. High equipment cost: Two independent sets of equipment are required, increasing manufacturing and installation costs;

[0005] 2. Large footprint: The two sets of equipment need to be arranged separately, occupying more factory space;

[0006] 3. Energy loss: There is heat loss when gas is transferred between the two sets of equipment, resulting in low energy efficiency.

[0007] Therefore, there is an urgent need for an integrated device to solve the problems of high cost, large footprint, and high energy consumption in existing technologies. Utility Model Content

[0008] The purpose of this utility model is to provide a mixed-flow heat recovery device, which integrates the mixer and the heat exchanger into the same housing to achieve the integrated function of "mixed cooling" and "heat recovery".

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0010] This utility model is a mixed-flow heat recovery device, comprising:

[0011] The outer casing serves to form the main structure of the equipment and the airflow channel;

[0012] An insulation layer, located inside the outer shell, is used for heat insulation;

[0013] A mixer, housed within the casing, is used to mix high-temperature flue gas and low-temperature flue gas;

[0014] The heat exchanger water pipes are located inside the shell and are used for heat exchange with the mixed flue gas.

[0015] In one embodiment, the mixer consists of multiple mixing plates made of SS304 stainless steel.

[0016] In one embodiment, the insulation layer is made of aluminum silicate material and has a thickness of not less than 50 mm.

[0017] In one embodiment, the heat exchanger water pipes are made of Φ45mm SS304 seamless steel pipes, arranged in a serpentine pattern.

[0018] In one embodiment, the housing is provided with a high-temperature flue gas inlet, a hot-side flue gas inlet, a hot-side flue gas outlet, a cold-side inlet, and a cold-side outlet, wherein the high-temperature flue gas inlet has a size of 800×800 / 300×300, and the hot-side flue gas inlet and outlet have a size of Φ1000.

[0019] In one embodiment, the two ends of the heat exchanger water pipe are fixedly connected to the cold side inlet and the cold side outlet, respectively.

[0020] This utility model has the following beneficial effects:

[0021] This invention integrates the mixer and heat exchanger into the same housing, achieving a unified function of "mixing and cooling" and "heat recovery." This reduces equipment manufacturing and installation costs, minimizes factory space occupation, and avoids heat loss during gas transmission. The mixer, composed of multiple SS304 stainless steel mixing plates, can fully mix high-temperature (900℃) and low-temperature (80-100℃) flue gas. The heat exchanger's water pipes use Φ45mm SS304 seamless steel pipes arranged in a serpentine pattern to enhance heat exchange efficiency. The 50mm thick aluminum silicate insulation layer inside the housing reduces heat leakage. Furthermore, the housing material, welding process, and surface treatment ensure the equipment's structural strength, stability, and corrosion resistance. It is suitable for treating waste gas with significant temperature differences discharged from RTO equipment and converting waste heat into domestic hot water, achieving both environmental protection and energy-saving effects.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of a mixed-flow heat recovery device;

[0025] Figure 2 A front view of a mixed-flow heat recovery device;

[0026] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Outer shell; 2. Insulation layer; 3. Heat exchanger water pipes; 4. Mixer; 5. Cold side inlet; 6. Cold side outlet; 7. High-temperature flue gas inlet; 8. Hot side flue gas inlet; 9. Hot side flue gas outlet. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Example 1

[0033] Please see Figures 1-3 As shown, this utility model is a mixed-flow heat recovery device, comprising:

[0034] 1. Outer shell, used to form the main structure of the equipment and airflow channels;

[0035] Insulation layer 2 is located inside the outer shell and is used for heat insulation;

[0036] Mixer 4, located inside the housing, is used to mix high-temperature flue gas and low-temperature flue gas;

[0037] The heat exchanger water pipe 3 is located inside the shell and is used for heat exchange with the mixed flue gas.

[0038] Furthermore, the mixer 4 is composed of multiple mixing plates, which are made of SS304 stainless steel.

[0039] Furthermore, the insulation layer 2 is made of aluminum silicate material with a thickness of not less than 50mm.

[0040] Furthermore, the heat exchanger water pipe 3 uses Φ45mm SS304 seamless steel pipe, arranged in a serpentine pattern.

[0041] Furthermore, the outer casing 1 is provided with a high-temperature flue gas inlet 7, a hot-side flue gas inlet 8, a hot-side flue gas outlet 9, a cold-side inlet 5, and a cold-side outlet 6. The high-temperature flue gas inlet 7 has dimensions of 800×800 / 300×300, and the hot-side flue gas inlet and outlet dimensions are Φ1000.

[0042] Furthermore, the two ends of the heat exchanger water pipe 3 are fixedly connected to the cold side inlet 5 and the cold side outlet 6, respectively.

[0043] Example 2

[0044] Please see Figures 1-3 As shown, this embodiment illustrates the specific structure of a mixed-flow heat recovery device:

[0045] 1. Overall Structure

[0046] The equipment consists of an outer shell 1, an insulation layer 2, a mixer 4, a heat exchanger, and water pipes 3;

[0047] Outer shell 1: Made of SS304 stainless steel, used to control airflow and provide a platform for mounting internal parts;

[0048] Insulation layer 2: Made of aluminum silicate material with a thickness of not less than 50mm, ensuring that the surface temperature of the equipment is ≤60℃ and reducing heat loss;

[0049] Mixer 4: Located inside the housing, it is used to regulate the two airflows of high temperature (900℃) and low temperature (80-100℃) to prevent the high temperature airflow from damaging the equipment;

[0050] Heat exchanger water pipe 3: Made of SS304 stainless steel, it controls the water flow direction, absorbs heat from the hot air flow, and converts waste heat into hot water.

[0051] 2. Interface Design

[0052] Interface Name Interface size Sealing surface type High-temperature flue gas inlet 800×800 / 300×300 FF (Flat Flange) Hot side flue gas inlet Φ1000 FF Hot side flue gas outlet Φ1000 RF (Raised Face Flange) Cold side inlet (soft water) Φ45 RF Cold side outlet Φ45 RF

[0053] 3. Technical parameters

[0054] Parameter type Cold side (soft water) Hot side (flue gas) Medium characteristics Dust-free and corrosion-free Dust-free and corrosion-free flow 31500 Nm³ / h 5 t / h Inlet temperature 130℃ 20℃ outlet temperature 80℃ 50℃ Drag loss 500 Pa 500 kPa Design temperature 770℃ 55℃ Design pressure 5000 Pa 0.5 MPa

[0055] Example 3

[0056] Please see Figures 1-3 As shown, this embodiment illustrates a method of using a mixed-flow heat recovery device:

[0057] I. Equipment Composition and Materials

[0058] Outer shell 1: Welded from 10mm thick SS304 stainless steel plate, with a 15mm thick protective plate to ensure structural strength;

[0059] Insulation layer 2: The inner layer is made of aluminum silicate insulation cotton, and the outer layer is covered with a glass fiber protective layer with a thermal conductivity of ≤0.045W / (m・K);

[0060] Mixer 4: Composed of multiple SS304 mixing plates (serial number 4, mass 81.87kg), with a spacing of 50mm between the plates, forming an interlaced airflow channel;

[0061] Heat exchanger water circuit 3: Φ45mm SS304 seamless steel pipes are used, arranged in a serpentine pattern, with an effective heat exchange area ≥100m².

[0062] II. Work Process

[0063] 1. Mixing process:

[0064] High-temperature flue gas (900℃) flows in from high-temperature flue gas inlet 7, and low-temperature flue gas (80-100℃) flows in from hot-side flue gas inlet 8;

[0065] The two airflows are fully mixed in the mixer by the guiding action of the mixing plate, and the temperature drops to about 130℃ after mixing;

[0066] 2. Heat exchange process:

[0067] The mixed flue gas enters the heat exchanger area and exchanges heat with the soft water (20°C) in the water pipes;

[0068] After absorbing heat, the temperature of the soft water rises to 50°C and is discharged from cold side outlet 6, which can be used as domestic hot water.

[0069] Once the flue gas temperature drops below 80°C, it is discharged from the hot-side flue gas outlet and enters the subsequent treatment process.

[0070] III. Manufacturing and Installation Requirements

[0071] 1. Manufacturing process:

[0072] All profiles must be straightened before welding, and the straightness error must be ≤1mm / m after welding;

[0073] Continuous welding is performed using E4303 welding rods, with the weld leg height ≥ 0.7 times the thickness of the adjacent weldment, and the weld quality grade is Class II (GB3424-86).

[0074] Post-weld stress-relief annealing is performed to eliminate welding stress.

[0075] 2. Surface treatment:

[0076] Apply two coats of anti-rust primer and two coats of topcoat (color GSB B01), with a coating thickness ≥100μm;

[0077] 3. Installation tolerances:

[0078] Dimensional tolerances: ≤4000mm according to ISO2768-M, >4000mm according to DIN7168-M;

[0079] Geometric tolerances: ≤3000mm according to ISO2768-KE, >3000mm according to DIN7168-T.

[0080] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mixed-flow heat recovery device, characterized in that, include: The outer casing (1) is used to form the main structure of the equipment and the airflow channel; The insulation layer (2) is located inside the outer shell and is used for heat insulation; Mixer (4), located inside the housing, is used to mix high-temperature flue gas and low-temperature flue gas; The heat exchanger water pipe (3) is installed inside the shell and is used for heat exchange with the mixed flue gas.

2. The mixed-flow heat recovery device according to claim 1, characterized in that, The mixer (4) consists of multiple mixing plates, which are made of SS304 stainless steel.

3. The mixed-flow heat recovery device according to claim 1, characterized in that, The insulation layer (2) is made of aluminum silicate material and has a thickness of not less than 50 mm.

4. The mixed-flow heat recovery device according to claim 1, characterized in that, The heat exchanger water pipe (3) is made of Φ45mm SS304 seamless steel pipe, arranged in a serpentine pattern.

5. A mixed-flow heat recovery device according to claim 1, characterized in that, The outer shell (1) is provided with a high-temperature flue gas inlet (7), a hot-side flue gas inlet (8), a hot-side flue gas outlet (9), a cold-side inlet (5) and a cold-side outlet (6), wherein the high-temperature flue gas inlet (7) has a size of 800×800 / 300×300, and the hot-side flue gas inlet and outlet size is Φ1000.

6. The mixed-flow heat recovery device according to claim 5, characterized in that, The two ends of the heat exchanger water pipe (3) are fixedly connected to the cold side inlet (5) and the cold side outlet (6) respectively.

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