A zeolite rotary wheel rto exhaust gas treatment device

Abstract

The utility model discloses a zeolite runner RTO waste gas treatment device, including the pretreatment unit, zeolite runner adsorption unit, RTO incineration unit and the air draught fan that pass through the pipeline and communicate in proper order, zeolite runner adsorption unit includes runner housing and sets up in its inside zeolite runner, the runner housing fixed mounting is on the top wall of RTO incineration unit, the desorption waste gas export of runner housing is communicated with the waste gas import of RTO incineration unit through the perpendicular and the through connection air channel, the high temperature backflushing pipeline is connected on the purification gas export pipeline of RTO incineration unit, and the other end of high temperature backflushing pipeline is connected to the desorption area import of runner housing, the utility model discloses zeolite runner and RTO are directly connected in succession, and the path between desorption waste gas export and RTO waste gas import is extremely short, and the heat dissipation area and heat loss of waste gas pipeline are greatly reduced, directly utilize the high temperature purification gas of RTO self -generation and carry out backflushing desorption to zeolite runner, and the heat energy realizes the internal circulation utilization of system.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment devices, specifically to a zeolite rotor RTO waste gas treatment device. Background Technology

[0002] The combination of zeolite rotor concentrator and regenerative thermal oxidizer (RTO) technology is currently an effective means of treating large volumes of low-concentration organic waste gas. Its basic principle is: the waste gas first passes through a zeolite rotor, where organic matter is adsorbed and concentrated; the concentrated high-concentration waste gas then enters the RTO for high-temperature incineration, completely decomposing it into CO2 and H2O.

[0003] However, existing zeolite rotor RTO devices typically have the following drawbacks:

[0004] First, it adopts a split design, meaning the zeolite rotor unit and the RTO unit are two independent devices connected by a long external pipeline. This structure results in long connecting pipes, a large heat dissipation area, and a significant temperature drop in the high-concentration desorbed waste gas during transportation. When it enters the RTO, it requires more fuel to reheat it to the ignition temperature, resulting in energy waste and high operating energy consumption.

[0005] Secondly, in traditional processes, the heat source required for desorption of the zeolite rotor usually needs to be prepared separately. A common practice is to use a separate fresh air heater to heat fresh air to a high temperature of around 200°C before using it to purge the zeolite rotor. This method relies entirely on the continuous consumption of external energy, failing to effectively utilize the enormous heat energy generated within the system itself, leading to secondary energy waste and resulting in high operating costs for the entire system. Utility Model Content

[0006] (I) Technical Issues

[0007] This invention addresses the problems of long connecting pipes, large heat loss, and high energy consumption in existing split-type zeolite rotor RTO devices by providing an integrated zeolite rotor RTO waste gas treatment device with a compact structure, high thermal energy utilization rate, and low operating cost.

[0008] (II) Technical Content

[0009] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a zeolite rotor RTO waste gas treatment device, comprising a pretreatment unit, a zeolite rotor adsorption unit, an RTO combustion unit, and an induced draft fan connected sequentially by pipelines. The zeolite rotor adsorption unit includes a rotor shell and a zeolite rotor disposed inside it. The rotor shell is fixedly installed on the top wall of the RTO combustion unit. The desorption waste gas outlet of the rotor shell is connected to the waste gas inlet of the RTO combustion unit through a vertical and through connecting duct. A high-temperature backflush pipe is connected to the purified gas outlet pipe of the RTO combustion unit, and the other end of the high-temperature backflush pipe is connected to the desorption zone inlet of the rotor shell, for drawing back part of the high-temperature purified gas generated by the RTO combustion unit to perform high-temperature desorption on the zeolite rotor.

[0010] Furthermore, the exterior of the connecting air duct is provided with a thermal insulation material layer.

[0011] Furthermore, the high-temperature backflush pipeline is equipped with a regulating valve to control the airflow.

[0012] Furthermore, the rotor housing is rigidly connected and fixed to the RTO incineration unit via a flange.

[0013] Furthermore, the RTO incineration unit is a two-chamber or three-chamber RTO.

[0014] Furthermore, the pretreatment unit includes a primary plate filter and a medium-efficiency bag filter arranged sequentially along the airflow direction to remove dust from the exhaust gas.

[0015] (III) Technical Effects

[0016] Compared with existing technologies, the advantages of this invention are as follows: the zeolite rotor is directly connected to the RTO vertically, the path between the desorbed waste gas outlet and the RTO waste gas inlet is extremely short, and it is a built-in vertical air duct, which greatly reduces the heat dissipation area and heat loss of the waste gas pipeline. This allows the high-temperature desorbed waste gas to enter the RTO for combustion at almost the original temperature, significantly reducing the additional fuel consumed by the RTO to heat the waste gas, resulting in significant energy savings. Furthermore, by directly utilizing the high-temperature purified gas generated by the RTO itself for backflushing and desorption of the zeolite rotor, the thermal energy is recycled within the system, further reducing dependence on external energy sources and lowering operating costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a zeolite rotor RTO waste gas treatment device according to this utility model. Figure 1 .

[0018] Figure 2 This is a three-dimensional structural diagram of a zeolite rotor RTO waste gas treatment device according to this utility model. Figure 2 .

[0019] Figure 3 This is a three-dimensional structural diagram of a zeolite rotor RTO waste gas treatment device according to this utility model. Figure 3 .

[0020] Figure 4 This is a schematic diagram of the main structure of a zeolite rotor RTO waste gas treatment device according to this utility model.

[0021] Figure 5 This is a left-side structural schematic diagram of a zeolite rotor RTO waste gas treatment device according to this utility model.

[0022] As shown in the figure: 1. Pretreatment unit; 2. Zeolite rotor adsorption unit; 3. RTO incineration unit; 4. Exhaust fan; 5. Connecting air duct; 6. High-temperature backflush pipeline; 21. Rotor shell; 22. Zeolite rotor; 23. Desorption exhaust gas outlet; 32. Exhaust gas inlet; 51. Insulation material layer; 61. Regulating valve; 11. Primary plate filter; 12. Medium-efficiency bag filter. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combined with appendix Figure 1 To be continued Figure 5A zeolite rotor RTO waste gas treatment device includes a pretreatment unit 1, a zeolite rotor adsorption unit 2, an RTO combustion unit 3, and an induced draft fan 4, which are connected sequentially by pipelines. The zeolite rotor adsorption unit 2 includes a rotor housing 21 and a zeolite rotor 22 disposed inside it. The rotor housing 21 is fixedly installed on the top wall of the RTO combustion unit 3. The desorption waste gas outlet 23 of the rotor housing 21 is connected to the waste gas inlet 32 ​​of the RTO combustion unit 3 through a vertical and through connecting air duct 5. A high-temperature backflush pipe 6 is connected to the purified gas outlet pipe of the RTO combustion unit 3. The other end of the high-temperature backflush pipe 6 is connected to the desorption zone inlet of the rotor housing 21, which is used to draw back part of the high-temperature purified gas generated by the RTO combustion unit 3 to perform high-temperature desorption on the zeolite rotor 22.

[0027] In this embodiment, as a preferred technical solution, the outside of the connecting air duct 5 is provided with a heat insulation material layer 51, the high temperature backflush pipe 6 is provided with a regulating valve 61 for controlling the airflow, the rotor shell 21 is rigidly connected and fixed to the RTO incineration unit 3 by a flange, and the RTO incineration unit 3 is a two-chamber or three-chamber RTO.

[0028] In this embodiment, as a preferred technical solution, the pretreatment unit 1 includes a primary plate filter 11 and a medium-efficiency bag filter 12 arranged sequentially along the airflow direction for removing dust from the exhaust gas.

[0029] This zeolite rotor RTO waste gas treatment device achieves efficient treatment of large volumes of low-concentration organic waste gas through the synergistic operation of pretreatment, adsorption concentration, high-temperature desorption, and incineration purification. The specific workflow is as follows:

[0030] 1. Waste gas pretreatment stage

[0031] The organic waste gas to be treated first enters the pretreatment unit 1, which is equipped with a primary plate filter 11 and a medium-efficiency bag filter 12 in sequence along the airflow direction. As the waste gas flows through these two stages of filters, dust, particles and other impurities are gradually intercepted and removed, preventing impurities from clogging the adsorption channels of the zeolite rotor 22 and affecting the adsorption efficiency.

[0032] 2. Organic waste gas adsorption and concentration stage

[0033] The pretreated clean organic waste gas enters the zeolite rotor adsorption unit 2, the core component of which is the zeolite rotor 22 installed inside the rotor housing 21. During normal operation, the zeolite rotor 22 rotates continuously, and its adsorption area is in full contact with the pretreated waste gas. Due to the extremely strong adsorption performance of zeolite material, the organic pollutants in the waste gas are efficiently adsorbed on the surface and within the pores of the zeolite rotor 22, and the clean gas flow after removing the organic pollutants is discharged through the exhaust end of the zeolite rotor adsorption unit 2.

[0034] 3. High-temperature desorption stage of zeolite rotor

[0035] Once the adsorption zone of the zeolite rotor 22 reaches saturation, the desorption stage begins. This stage does not rely on an external heat source; instead, it directly utilizes the high-temperature purified gas generated by the RTO incineration unit 3 itself as the desorption heat source. A high-temperature backflush pipe 6 is connected to the purified gas outlet pipe of the RTO incineration unit 3, and operators can control the flow rate of the high-temperature purified gas by adjusting the regulating valve 61 on the backflush pipe. The high-temperature purified gas is transported through the high-temperature backflush pipe 6 to the desorption zone inlet of the rotor housing 21, where it backflushes the zeolite rotor 22, which has rotated to the desorption zone, at a temperature of approximately 200°C. Under the influence of high temperature, the organic pollutants adsorbed on the zeolite rotor 22 are completely desorbed, forming high-concentration organic waste gas. Simultaneously, since the high-temperature backflush pipe 6 transports the high-temperature gas from the RTO incineration unit 3 itself, the system's internal heat energy is recycled, significantly reducing external energy consumption.

[0036] 4. High-concentration waste gas incineration and purification stage

[0037] The high-concentration organic waste gas generated by desorption is discharged through the desorption waste gas outlet 23 of the rotor housing 21, and then enters the connecting duct 5. This connecting duct 5 is a vertical and continuous built-in structure, externally wrapped with an insulation material layer 51, which minimizes heat loss of the high-concentration waste gas during transportation. The connecting duct 5 is directly connected to the waste gas inlet 32 ​​of the RTO incineration unit 3, allowing the high-concentration desorbed waste gas to enter the RTO incineration unit 3 almost at its original desorption temperature. Inside the RTO incineration unit 3, the high-concentration organic waste gas is fully incinerated in a high-temperature environment, and the organic pollutants are completely decomposed into harmless CO2 and H2O, completing the final purification of the organic waste gas.

[0038] 5. Purified gas and system circulation stage

[0039] The high-temperature purified gas generated by the RTO incineration unit 3 is processed in two parts: one part is fed into an external heat exchanger through the purified gas outlet pipe of the RTO incineration unit 3 for energy recovery and emission in compliance with standards; the other part is transported to the desorption zone inlet of the rotor shell 21 through the high-temperature backflush pipe 6 for high-temperature desorption of the zeolite rotor 22, forming a system internal circulation of thermal energy.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A zeolite rotor RTO waste gas treatment device, comprising a pretreatment unit (1), a zeolite rotor adsorption unit (2), an RTO incineration unit (3), and an induced draft fan (4) connected sequentially by pipelines, characterized in that: The zeolite rotor adsorption unit (2) includes a rotor shell (21) and a zeolite rotor (22) disposed therein; the rotor shell (21) is fixedly installed on the top wall of the RTO incineration unit (3); the desorption exhaust gas outlet (23) of the rotor shell (21) is connected to the exhaust gas inlet (32) of the RTO incineration unit (3) through a vertical and through connecting duct (5); The purified gas outlet pipe of the RTO incineration unit (3) is connected to a high-temperature backflush pipe (6). The other end of the high-temperature backflush pipe (6) is connected to the desorption zone inlet of the rotor housing (21) to draw back part of the high-temperature purified gas generated by the RTO incineration unit (3) for high-temperature desorption of the zeolite rotor (22).

2. The zeolite rotor RTO waste gas treatment device according to claim 1, characterized in that: The outside of the connecting air duct (5) is provided with a thermal insulation material layer (51).

3. A zeolite rotor RTO waste gas treatment device according to claim 1 or 2, characterized in that: The high-temperature backflush pipeline (6) is equipped with a regulating valve (61) for controlling the airflow.

4. The zeolite rotor RTO waste gas treatment device according to claim 1, characterized in that: The rotor housing (21) is rigidly connected and fixed to the RTO incineration unit (3) via a flange.

5. The zeolite rotor RTO waste gas treatment device according to claim 4, characterized in that: The RTO incineration unit (3) is a two-chamber or three-chamber RTO.

6. The zeolite rotor RTO waste gas treatment device according to claim 1, characterized in that: The pretreatment unit (1) includes a primary plate filter (11) and a medium-efficiency bag filter (12) arranged sequentially along the airflow direction, for removing dust from the exhaust gas.

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