RTO waste gas incineration system tail gas heat energy recovery equipment

Abstract

This utility model discloses a waste gas heat recovery device for an RTO waste gas incineration system, including a recovery tank, an inlet pipe at the bottom of the recovery tank, an outlet at the top of the recovery tank, a mixing unit above the inlet pipe, and a recovery unit above the mixing unit. Both the mixing unit and the recovery unit are located inside the recovery tank, which is filled with water at the bottom, and the recovery unit is submerged in the water. The recovery unit includes two support pipes, which are ring-shaped and connected to several connecting pipes. Several vertical pipes are evenly arranged between the two support pipes, connecting the two support pipes. Both support pipes are connected to a heat exchange unit. The waste gas heat recovery device of this utility model allows the waste gas to pass through a water body, causing the water body to heat up. In conjunction with the recovery unit and the heat exchange unit, the heat energy of the high-temperature water body is absorbed to form a high-temperature heat source, which is convenient for subsequent heat use. This realizes the recovery of heat energy in the waste gas, saves energy, and further reduces the temperature of the waste gas.

Description

Technical Field

[0001] This utility model relates to RTO waste gas incineration technology, specifically a tail gas heat energy recovery device for an RTO waste gas incineration system. Background Technology

[0002] Current regenerative thermal oxidizers (RTOs) concentrate and desorb the organic waste gas discharged from production through a rotary concentrator. The organic waste gas is then heated by the regenerative ceramic, and its temperature rises rapidly. Under the heating effect of combustion gas in the furnace, the temperature reaches 680-1050℃. At this high temperature, the VOCs in the organic waste gas are directly decomposed into carbon dioxide and water vapor, forming odorless high-temperature flue gas. This flue gas then flows through the low-temperature regenerative ceramic, and a large amount of heat energy is transferred from the flue gas to the regenerative body to heat the organic waste gas to be decomposed in the next cycle. After the temperature of the high-temperature flue gas drops significantly, it is discharged into the outdoor atmosphere.

[0003] However, the temperature of the flue gas exhaust is still relatively high. Currently, the heat energy of this exhaust gas is directly emitted, which not only affects air quality but also wastes energy. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a tail gas heat energy recovery device for an RTO waste gas incineration system, which can recover heat energy from the tail gas, save energy, and further reduce the tail gas temperature.

[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: As shown in 1-3, an RTO waste gas incineration system tail gas heat energy recovery device includes a recovery tank. The bottom of the recovery tank is provided with an air inlet pipe, and the top of the recovery tank is provided with an outlet. A mixing unit is provided above the air inlet pipe, and a recovery unit is provided above the mixing unit. Both the mixing unit and the recovery unit are located inside the recovery tank. The bottom of the recovery tank is filled with water, and the recovery unit is submerged in the water. The recovery unit includes two support pipes, which are annular. Several connecting pipes are connected inside the support pipes. Several vertical pipes are evenly arranged between the two support pipes, and the vertical pipes connect the two support pipes. Both support pipes are connected to a heat exchange unit. The mixing unit includes a stirring shaft and several stirring blades. The stirring blades are evenly distributed on the stirring shaft, and the stirring shaft is driven by a motor to rotate.

[0006] Preferably, a gas distributor is provided at the bottom of the recovery tank, and the gas distributor is connected to the air inlet pipe.

[0007] Preferably, a filter screen is provided at the top of the recycling tank, and the filter screen is located below the discharge port.

[0008] Preferably, the bottom of the recycling tank is equipped with a circulation pump, which is used to pump water from the bottom of the recycling tank to the top of the recycling unit.

[0009] Preferably, the motor is fixed to the side wall of the recycling tank by a heat insulation pad.

[0010] Preferably, the bottom of the recycling tank is equipped with an air vent valve.

[0011] Preferably, the recycling tank is equipped with a water supply valve at the top.

[0012] In summary, this utility model achieves the following technical effects:

[0013] The present invention relates to an RTO waste gas incineration system tail gas heat energy recovery device, which allows tail gas to pass through a water body, causing the water body to heat up. In conjunction with the recovery unit and heat exchange unit, the heat energy of the high-temperature water body is absorbed to form a high-temperature heat source, so as to facilitate the subsequent use of heat, realize the recovery of heat energy in tail gas, save energy, and further reduce tail gas temperature. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the tail gas heat energy recovery equipment of the RTO waste gas incineration system of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the recovery unit of the tail gas heat energy recovery equipment of the RTO waste gas incineration system of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the recovery unit of the tail gas heat energy recovery equipment of the RTO waste gas incineration system of this utility model;

[0017] Explanation of the reference numerals in the accompanying drawings: 1. Recovery tank; 2. Discharge port; 3. Filter screen; 4. Gas distributor; 5. Mixing unit; 6. Motor; 7. Recovery unit; 71. Support pipe; 72. Vertical pipe; 73. Connecting pipe; 8. Heat exchange unit; 9. Circulation pump; 10. Exhaust valve. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element 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.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Example 1:

[0025] As shown in Figures 1-3, a waste gas heat recovery device for an RTO (Regenerative Thermal Oxidizer) incineration system includes a recovery tank 1. The recovery tank 1 has an inlet pipe at its bottom and an outlet 2 at its top. A mixing unit 5 is located above the inlet pipe, and a recovery unit 7 is located above the mixing unit 5. Both the mixing unit 5 and the recovery unit 7 are located inside the recovery tank 1. The bottom of the recovery tank 1 is filled with water, and the recovery unit 7 is submerged in the water. The recovery unit 7 includes two support pipes 71, which are annular. Several connecting pipes 73 are connected within each support pipe 71. Several vertical pipes 72 are evenly distributed between the two support pipes 71, connecting the two support pipes 71. Both support pipes 71 are connected to a heat exchange unit 8. The mixing unit 5 includes a stirring shaft and several stirring blades, which are evenly distributed on the stirring shaft. The stirring shaft is driven to rotate by a motor 6.

[0026] The heat exchange unit 8 is connected to an external cold source. The heat exchange unit 8 is a heat exchanger, which is a device used to transfer heat from a hot fluid to a cold fluid to meet the specified process requirements. It is an industrial application of convective heat transfer and heat conduction. The heat exchanger can transfer heat from the high-temperature water to the external cold source, thereby realizing the heat recovery function. The mixing unit 5 can make the water in the recovery tank 1 circulate, avoid the temperature difference between the upper and lower layers of the water, and break up the exhaust gas bubbles, making the exhaust gas bubbles smaller, thereby increasing the contact area between the exhaust gas and the water, and thus improving the heat transfer efficiency.

[0027] In actual use, the high-temperature water body heats the support pipe 71, the vertical pipe 72 and the connecting pipe 73, causing the heat transfer fluid in the support pipe 71, the vertical pipe 72 and the connecting pipe 73 to heat up and flow upward, collect in the upper support pipe 71 and flow towards the heat exchange unit 8. After absorbing heat in the heat exchange unit 8, the heat transfer fluid cools down and flows downward to the lower support pipe 71, naturally forming a heat transfer fluid circulation. Alternatively, a liquid pump can be added to force circulation.

[0028] The tail gas heat recovery device of the RTO waste gas incineration system in this embodiment allows the tail gas to pass through a water body, which raises the temperature of the water body. In conjunction with the recovery unit 7 and the heat exchange unit 8, the heat energy of the high-temperature water body is absorbed to facilitate the subsequent use of heat, thereby realizing the recovery of heat energy in the tail gas, saving energy, and further reducing the tail gas temperature.

[0029] The bottom of the recovery tank 1 is equipped with a gas distributor 4, which is connected to the air inlet pipe. The gas distributor 4 can make the exhaust gas evenly distributed, achieve uniform contact between the exhaust gas and the water, and improve the heat exchange efficiency.

[0030] The top of the recycling tank 1 is equipped with a filter screen 3, which is located below the discharge port 2; the filter screen 3 can filter water droplets and dust in the exhaust gas.

[0031] The bottom of the recycling tank 1 is equipped with a circulation pump 9, which is used to pump water from the bottom of the recycling tank 1 to the top of the recycling unit 7. The circulation pump 9 can make the water in the recycling tank 1 circulate, so as to avoid the temperature difference between the upper and lower layers of the water being too large, which would affect the efficiency of the water in absorbing heat from the exhaust gas.

[0032] The motor 6 is fixed to the side wall of the recycling tank 1 by a heat insulation pad.

[0033] The bottom of the recycling tank 1 is equipped with an air vent valve 10.

[0034] The top of the recycling tank 1 is equipped with a water supply valve.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A waste gas heat recovery device for an RTO waste gas incineration system, characterized in that, The device includes a recycling tank, an air inlet pipe at the bottom of the recycling tank, an outlet at the top of the recycling tank, a mixing unit above the air inlet pipe, and a recycling unit above the mixing unit. Both the mixing unit and the recycling unit are located inside the recycling tank. The bottom of the recycling tank is filled with water, and the recycling unit is submerged in the water. The recycling unit includes two support pipes, which are ring-shaped and connected to several connecting pipes. Several vertical pipes are evenly arranged between the two support pipes and are connected to the two support pipes. Both support pipes are connected to the heat exchange unit. The mixing unit includes a stirring shaft and several stirring blades, the stirring blades being evenly distributed on the stirring shaft, which is driven to rotate by a motor.

2. The tail gas heat recovery equipment of an RTO waste gas incineration system according to claim 1, characterized in that, A gas distributor is installed at the bottom of the recovery tank, and the gas distributor is connected to the air inlet pipe.

3. The tail gas heat recovery equipment of an RTO waste gas incineration system according to claim 1, characterized in that, The top of the recycling tank is equipped with a filter screen, which is located below the discharge port.

4. The tail gas heat recovery equipment of an RTO waste gas incineration system according to claim 1, characterized in that, The bottom of the recycling tank is equipped with a circulation pump, which is used to pump water from the bottom of the recycling tank to the top of the recycling unit.

5. The tail gas heat recovery equipment of an RTO waste gas incineration system according to claim 1, characterized in that, The motor is fixed to the side wall of the recycling tank by a heat insulation pad.

6. The tail gas heat recovery equipment of an RTO waste gas incineration system according to claim 1, characterized in that, The bottom of the recycling tank is equipped with an air vent valve.

7. The tail gas heat recovery equipment of an RTO waste gas incineration system according to claim 1, characterized in that, The recycling tank is equipped with a water supply valve at the top.

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