Device for uniformly distributing airflow at inlet and outlet of heat storage incinerator

Abstract

The utility model belongs to the technical field of VOCs (volatile organic compounds) treatment, and provides a heat storage incinerator inlet and outlet airflow uniform distribution device which comprises a folded plate. And the folded plate is fixed in the furnace body, covers the upper part of the expanding section cavity, is positioned below the regular heat accumulator, and is formed by sequentially connecting at least two sieve plates. According to the device, the perforated folded plate is arranged in the limited space of the RTO inlet, gas is redistributed through the folded plate, gas flow can be promoted to be uniformly distributed, sintering ash can fall down through the holes in the folded plate, purging is facilitated, and blockage is prevented. According to the device, factors such as space saving, flow field uniform distribution, resistance reduction, energy conservation and consumption reduction, convenience in maintenance, convenience in dust collection and the like are synchronously considered, and a good flow equalizing effect can be achieved through reasonable trepanning shapes, trepanning distances and trepanning sizes.

Description

Technical Field

[0001] The utility model belongs to the technical field of VOCs treatment, and specifically relates to an inlet and outlet airflow uniform distribution device for a thermal storage incinerator. Background Art

[0002] Volatile organic pollutants (VOCs) not only cause serious environmental pollution, but also pose potential hazards to human health. VOCs can react with other pollutants in the atmosphere, such as nitrogen oxides and sulfur dioxide, to form secondary pollutants. They are also PM 2.5 The main precursor of secondary pollutants such as O3 and VOCs. The emission of VOCs in my country is still at a high level. VOCs control is the top priority in current environmental governance. Thermal storage oxidation technology has strong adaptability, high efficiency and no secondary pollution. It is an important technical route in VOCs control.

[0003] The regenerative thermal incinerator (RTO for short) heats the organic waste gas to above 760 degrees Celsius, so that the volatile organic matter in the waste gas is directly oxidized and decomposed in a high-temperature environment to form pollution-free CO2 and H2O, thereby treating the waste gas pollutants. The heat generated by the oxidation and decomposition process is stored in the heat storage body in the incinerator. When the high-temperature flue gas flows out of the furnace body, the temperature of the heat storage body rises and the energy is retained in the furnace. In the next cycle of operation, the heat energy stored in the heat storage body is used to preheat the untreated organic waste gas, thereby achieving the effect of heat storage and energy saving. At present, the regenerative thermal incinerator technology plays an important role in the organic waste gas treatment technology in the petrochemical, packaging and printing, automobile manufacturing, building decoration, machinery and equipment manufacturing and other industries.

[0004] The structural type of the inlet and outlet of the incinerator determines the uniformity of the airflow reaction in the furnace, thus affecting the reaction efficiency. At this stage, the inlet and outlet channels of the common three-chamber RTO device are arranged below the RTO furnace body, and are distributed into each incinerator through a common flue. Since the cross-section of the inlet and outlet channels is smaller than the cross-section of the furnace body, there is airflow redistribution when the airflow enters the furnace body from the inlet. In the prior art, the airflow is usually redistributed by setting a guide diffuser plate, and the diffuser plate is usually set in a trumpet shape. However, due to the small space of the air inlet, the effect of setting the diffuser plate is very limited, and a good flow equalization effect cannot be achieved. In addition, the diffuser plate will block the sintered ash descending channel in the furnace, aggravate the blockage of the air inlet, and reduce the service life of the equipment. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an inlet and outlet airflow uniform distribution device for a heat storage incinerator to solve the problems of uneven airflow distribution and serious blockage at the air inlet when the airflow enters the incinerator.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a heat storage incinerator inlet and outlet airflow uniform distribution device, including a folding plate;

[0007] The folding plate is fixed inside the furnace body, covers the cavity above the expanded diameter section and is located below the regular heat storage body, and is composed of at least two sieve plates connected in sequence.

[0008] Preferably, the folding plate includes four sieve plates, and the four sieve plates are connected in sequence to form a wavy structure.

[0009] Preferably, the porosity of the two middle sieve plates is smaller than the porosity of the sieve plates on both sides.

[0010] Preferably, the opening rate of the sieve plate is 20%-60%.

[0011] Preferably, the angle between two adjacent sieve plates is 60°-120°.

[0012] Preferably, the folding plate is fixed inside the furnace body by a steel structure beam.

[0013] Preferably, a sharp corner of the steel structure beam faces the cavity of the expanded diameter section.

[0014] Preferably, loose heat accumulators are stacked on the folding plate, and the regular heat accumulators are arranged above the loose heat accumulators.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model provides a heat storage incinerator inlet and outlet airflow distribution device, which is provided with a folding plate with holes in the limited space of the RTO inlet, and the gas is redistributed through the folding plate, which can promote the airflow to be evenly distributed, and the sintered ash can fall through the openings on the folding plate, which is convenient for blowing and preventing blockage. The device simultaneously considers factors such as space saving, flow field uniformity, resistance reduction, energy saving and consumption reduction, easy maintenance, and convenient ash collection, and can achieve good flow equalization through reasonable opening shape, opening spacing, and opening size.

[0017] 2. The utility model provides a heat storage incinerator inlet and outlet airflow distribution device. The folding plate can be installed inside the furnace body through the steel structure beam fixed on the furnace body. While not changing the furnace body structure, the overall structural strength can be strengthened. The sharp corner of the steel structure beam faces the airflow direction. While strengthening the support, it also plays a role in diversion and diversion, reducing the negative impact of the internal support structure on the treatment effect.

[0018] 3. The utility model provides a heat storage incinerator inlet and outlet airflow uniform distribution device, and the folding plate can be used to additionally stack loose heat storage bodies to further enhance the mass transfer effect and improve the heat storage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the front structure of a thermal storage incinerator provided in an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the front structure of a device for distributing airflow inlet and outlet of a thermal storage incinerator provided by an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the front structure of the connection between the folded plate and the steel structure beam of a heat storage incinerator inlet and outlet airflow uniform distribution device provided by the embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the top view structure of a folding plate of an inlet and outlet airflow distribution device for a thermal storage incinerator provided in an embodiment of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 11. Smoke and air duct at the inlet of regenerative incinerator; 12. Smoke and air duct at the outlet of regenerative incinerator; 21. Oxidation chamber; 22. First regenerative chamber; 23. Second regenerative chamber; 24. Third regenerative chamber; 25. Regular regenerative body; 26. Loose regenerative body; 27. Cavity of expanded diameter section; 28. Folded plate; 29. ​​Steel structure beam; 31. First sieve plate; 32. Second sieve plate; 33. Third sieve plate; 34. Fourth sieve plate. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.

[0026] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0027] like Figure 1-2 As shown, the regenerative incinerator comprises three regenerative chambers, namely the first regenerative chamber 22, the second regenerative chamber 23, and the third regenerative chamber 24, which are respectively provided with three expanded diameter section cavities 27, and the three expanded diameter section cavities 27 are respectively connected to the three regenerative chambers.

[0028] The present embodiment provides a heat storage incinerator inlet and outlet airflow uniform distribution device, including three folding plates 28, the three folding plates 28 are fixed inside the furnace body, the three folding plates 28 respectively cover the three expanded diameter section cavities 27, and are all located below the corresponding regular heat storage body 25, the folding plates 28 are composed of four sieve plates connected in sequence. The sieve plates can be arranged with uniform or non-uniform openings, and the openings can be strip-shaped, circular, square, rectangular, elliptical, etc.

[0029] Based on the above structure, the exhaust gas enters the system through the inlet smoke duct 11 of the regenerative incinerator, and enters the first regenerative chamber 22 under the control of the switching valve. When the exhaust gas passes through the expanded diameter cavity 27 and flows to the folding plate 28, it will change its original running trajectory and flow in a direction perpendicular to the sieve plate. Different sieve plates have different directions, which can achieve the effect of uniform airflow distribution. After passing through the first regenerative chamber 22, the exhaust gas enters the oxidation chamber 21, where it is oxidized and burned into CO2 and H2O. The high-temperature gas after the reaction enters the second regenerative chamber 23, where the heat is stored in the regenerative body of the second regenerative chamber 23, and the clean gas is discharged through the outlet smoke duct 12 of the regenerative incinerator.

[0030] In summary, the device sets a folded plate with holes in the limited space of the RTO inlet, and redistributes the gas through the folded plate 28, which can promote uniform airflow, and the sintered ash can fall through the holes on the folded plate 28, which is convenient for purging and preventing blockage. The device simultaneously considers factors such as space saving, uniform flow field, reduced resistance, energy saving and consumption reduction, easy maintenance, and convenient ash collection, and can achieve good flow uniformity through reasonable hole shape, hole spacing, and hole size.

[0031] In this embodiment, the four sieve plates are connected in sequence to form a wave-shaped structure. The opening rate of the two middle sieve plates is smaller than the opening rate of the sieve plates on the two sides. Figure 3-4 As shown, the four sieve plates are respectively the first sieve plate 31, the second sieve plate 32, the third sieve plate 33, and the fourth sieve plate 34. The two middle sieve plates are respectively the second sieve plate 32 and the third sieve plate 33.

[0032] Specifically, the airflow passing through the second sieve plate 32 and the third sieve plate 33 forms a counterattack after passing through the plates, and the local resistance becomes larger. In addition, the second sieve plate 32 and the third sieve plate 33 have a smaller opening rate and a larger resistance, which promotes the airflow to the first sieve plate 31 and the fourth sieve plate 34, thereby guiding the airflow to both sides to achieve the effect of uniform airflow distribution.

[0033] In this embodiment, the opening rate of the sieve plate can be 20%-60%. Specifically, the opening shape, opening size, and hole spacing of the sieve plate can be adjusted according to the needs of the specific project, which can reduce the accumulation and blockage of ash generated by sintering, and the ash can fall through the openings on the sieve plate, thereby extending the service life of the entire equipment.

[0034] The angle between two adjacent sieve plates can be 60°-120°. Specifically, when the sieve plates are arranged at an angle, the optimal angle can be determined according to the specific conditions of each project and with reference to the flow field simulation results.

[0035] In this embodiment, the folding plate 28 is fixed inside the furnace body by a steel structure beam 29. Figure 3 As shown, the folded plate 28 is fixed to the two steel structure beams 29, the steel structure beams 29 are fixed inside the furnace body, and the two steel structure beams 29 are respectively arranged in two angles facing the expanded diameter section cavity 27. Bolt connection can be adopted, which will not damage the structure of the furnace body, and the steel structure beams 29 can play a role of reinforcement.

[0036] Among them, a sharp corner of the steel structure beam 29 faces the expanded diameter section cavity 27. That is, a sharp corner of the steel structure beam 29 faces the airflow direction, which not only strengthens the support, but also plays a role in diversion and guidance, reducing the negative impact of the internal support structure on the treatment effect.

[0037] In this embodiment, random heat storage bodies 26 are stacked on the folding plate 28, and the regular heat storage bodies 25 are arranged above the random heat storage bodies 26. The random heat storage bodies 26 can further enhance the mass transfer effect and improve the heat storage efficiency.

[0038] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.

[0039] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0040] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for distributing airflow at the inlet and outlet of a thermal storage incinerator, characterized in that: Includes folding plate(28); The folded plate (28) is fixed inside the furnace body, covers the cavity (27) of the expanded diameter section, and is located below the regular heat storage body (25), and the folded plate (28) is composed of at least two sieve plates connected in sequence.

2. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 1, characterized in that: The folding plate (28) comprises four sieve plates, and the four sieve plates are connected in sequence to form a wave-shaped structure.

3. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 2, characterized in that: The opening rates of the two middle sieve plates are smaller than the opening rates of the sieve plates at the two sides.

4. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 1, characterized in that: The opening rate of the sieve plate is 20%-60%.

5. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 1, characterized in that: The included angle between two adjacent sieve plates is 60°-120°.

6. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 1, characterized in that: The folding plate (28) is fixed inside the furnace body via a steel structure beam (29).

7. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 6, characterized in that: A sharp corner of the steel structure beam (29) faces the expanded diameter section cavity (27).

8. The device for distributing airflow at the inlet and outlet of a thermal incinerator according to claim 1, characterized in that: A random heat accumulator (26) is stacked on the folding plate (28), and the regular heat accumulator (25) is arranged above the random heat accumulator (26).

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