Electric heating RTO organic waste gas treatment system

Abstract

The utility model relates to the technical field of organic waste gas treatment, in particular to an electric heating RTO organic waste gas treatment system. Comprising an electric RTO furnace, a high-temperature valve, an RTO inlet switching valve, an RTO outlet switching valve, a fan, a fresh air valve, a high-temperature flue gas waste heat recovery device, an exhaust funnel and a connecting pipeline, wherein the waste gas inlet is connected with the fan through a waste gas inlet pipeline and connected with the electric RTO furnace through an electric RTO inlet pipeline, the electric RTO furnace is connected with the exhaust funnel through an electric RTO outlet pipeline, the RTO inlet switching valve is arranged on the electric RTO inlet pipeline, and the RTO outlet switching valve is arranged on the electric RTO outlet pipeline; the electric heater is arranged on the RTO furnace, the occupied area is reduced, the upper portion of the RTO heat preservation layer is of a trapezoidal structure, the uniformity of gas flowing in a combustion chamber is improved, and the service life of the electric heater is prolonged. RTO valve switching and electric heating temperature interlocking are achieved, the service life of the electric heater is prolonged, meanwhile, operation energy consumption is reduced, and the service life of the RTO valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas treatment, in particular to an electric heating RTO organic waste gas treatment system. Background Art

[0002] RTO stands for Regenerative Thermal Oxidizer. Its principle is to oxidize organic matter (VOCs) in exhaust gas into corresponding carbon dioxide and water at high temperatures, thereby purifying the exhaust gas and recovering the heat released during the decomposition of the exhaust gas. The RTO consists of a regenerator, a combustion chamber, and a heater. To ensure sufficient combustion of the organic waste gas, the RTO combustion chamber temperature must not fall below 760°C. RTO is currently recognized in the industry as one of the most efficient organic waste gas treatment technologies and is widely used in organic waste gas treatment across various industries.

[0003] However, current RTO technology presents certain challenges. Conventional RTO heating methods on the market primarily utilize fuels, including natural gas or liquid fuels. Although many enterprises generate organic waste gas that is well-suited for RTO treatment, conventional RTO technology is not an option due to a lack of fuel availability. Furthermore, the uneven gas flow distribution and temperature imbalance within the RTO combustion chamber lead to poor regional gas flow, excessively high temperatures, and low waste gas treatment efficiency. Utility Model Content

[0004] The utility model provides an electric heating RTO organic waste gas treatment system, which aims to provide a new heating method and improve the uniformity of the gas flow field distribution in the combustion chamber.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] An electrically heated RTO organic waste gas treatment system, comprising:

[0007] Electric RTO furnace, high-temperature valve, RTO inlet switching valve, RTO outlet switching valve, fan, fresh air valve, high-temperature flue gas waste heat recovery device, exhaust pipe and connecting pipes;

[0008] Wherein, the exhaust gas inlet is connected to the fan through the exhaust gas inlet pipe, and is connected to the electric RTO furnace through the electric RTO inlet pipe. The electric RTO furnace is connected to the exhaust pipe through the electric RTO outlet pipe. The RTO inlet switching valve is placed on the electric RTO inlet pipe, and the RTO outlet switching valve is placed on the electric RTO outlet pipe.

[0009] The fresh air valve is connected to the exhaust gas inlet pipe through the fresh air pipe, the electric RTO furnace and the high-temperature valve are connected through a high-temperature pipe 1, the high-temperature valve is connected to the high-temperature flue gas waste heat recovery device through a high-temperature pipe 2, and the high-temperature flue gas waste heat recovery device is further connected to the electric RTO outlet pipe through a high-temperature pipe 3;

[0010] The electric RTO furnace includes a combustion chamber, a heat storage area, an electric heater, and a thermal insulation layer.

[0011] Furthermore, the lower portion of the thermal insulation layer adopts a square structure, and the upper portion adopts a trapezoidal structure.

[0012] Furthermore, the heating tube of the electric heater is placed in the combustion chamber, and the electric heater is installed on the top and / or side.

[0013] Furthermore, a first temperature controller is installed on the electric heater, and a second temperature controller is installed on the combustion chamber.

[0014] The beneficial effects achieved by the utility model are:

[0015] This utility model provides an electrically heated RTO organic waste gas treatment system. Compared to conventional fuel-based RTO, it expands the application scope of RTO technology, enabling many enterprises with organic waste gas suitable for RTO treatment but lacking fuel to adopt RTO technology for treatment, thus contributing to the company's in-depth environmental management. Compared with conventional fuel-based RTO, the electric heater is placed on the RTO furnace, eliminating the need for supporting combustion systems, valve blocks, and other systems, reducing floor space. In addition, the high-temperature flue gas waste heat recovery device can be used to recycle waste heat, providing economic added value.

[0016] The utility model discloses an electric heating RTO organic waste gas treatment system. The upper part of the insulation layer adopts a trapezoidal structure, which can make the gas flow and distribution in the combustion chamber more uniform. On the one hand, it improves the purification efficiency. On the other hand, it improves the fluidity of the gas in the electric heating tube area, avoids dry burning of the heating tube, and increases the service life of the electric heater. Furthermore, it can reduce the gas flow resistance and reduce energy consumption.

[0017] The utility model discloses an electric heating RTO organic waste gas treatment system. The RTO switching valve is interlocked with the electric heating temperature controller. When the electric heating temperature reaches the set temperature value, the valve is switched. This can avoid the electric heater from running at high temperature for a long time, thereby increasing the service life of the electric heater and reducing the operating energy consumption. It can also avoid frequent switching of the RTO switching valve, thereby increasing the service life of the RTO valve and the stability of the RTO system operation.

[0018] This utility model is an electrically heated RTO organic waste gas treatment system. By installing a high-temperature flue gas waste heat recovery device, it can recycle the heat energy in the high-temperature flue gas emitted by the RTO furnace, further improving the system's energy utilization efficiency. This not only helps reduce energy consumption, but also reduces thermal pollution to the environment.

[0019] This utility model is an electrically heated RTO organic waste gas treatment system. By installing temperature controllers on the electric heater and combustion chamber, the heating process and the temperature inside the combustion chamber can be precisely controlled. This helps ensure that the waste gas is fully burned at an appropriate temperature, improving the purification effect while preventing damage to the equipment caused by excessively high temperatures.

[0020] The utility model discloses an electric heating RTO organic waste gas treatment system. The top and / or side installation method of the electric heater can meet specific spatial layout and design requirements, and brings significant effects in saving space, optimizing airflow distribution, and improving heating efficiency, and can better meet the needs of various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of an electric heating RTO organic waste gas treatment system;

[0023] Figure 2 This is a partial enlarged view of an electric heating RTO organic waste gas treatment system;

[0024] In the figure, 1. Electric RTO furnace; 101. Combustion chamber; 102. Heat storage area; 103. Electric heater; 104. Insulation layer; 2. High-temperature valve; 3. Fan; 4. Fresh air valve; 5. Exhaust chimney; 6. Exhaust gas inlet pipe; 7. Electric RTO inlet pipe; 8. Fresh air pipe; 9. Electric RTO outlet pipe; 10. High-temperature pipe 1; 11. High-temperature pipe 2; 12. Temperature controller 1; 13. Temperature controller 2; 14. High-temperature pipe 3; 15. High-temperature flue gas waste heat recovery device; 16. RTO inlet switching valve; 17. RTO outlet switching valve.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example 1

[0030] like Figure 1 As shown, the electric heating RTO organic waste gas treatment system of this embodiment mainly includes the following components: electric RTO furnace 1, high temperature valve 2, RTO inlet switching valve 16, RTO outlet switching valve 17, fan 3, fresh air valve 4, high temperature flue gas waste heat recovery device 15, exhaust pipe and connecting pipe.

[0031] The specific connection method is as follows: the exhaust gas inlet is connected to the fan 3 via the exhaust gas inlet pipe 6. The fan 3 sends the exhaust gas into the electric RTO inlet pipe 7, and then enters the electric RTO furnace 1 through the electric RTO inlet pipe 7. The exhaust gas treated by the electric RTO furnace 1 is connected to the exhaust pipe 5 via the electric RTO outlet pipe 9 and is ultimately discharged into the atmosphere. The electric RTO inlet pipe 7 and the electric RTO outlet pipe 9 are respectively equipped with an RTO inlet switching valve 16 and an RTO outlet switching valve 17 to control the inflow and outflow of exhaust gas.

[0032] Fresh air valve 4 is connected to the RTO exhaust outlet pipe via fresh air duct 8, introducing fresh air to regulate exhaust gas concentration and temperature. RTO furnace 1 is connected to high-temperature valve 2 via high-temperature duct 10. High-temperature valve 2 is connected to high-temperature flue gas waste heat recovery device 15 via high-temperature duct 2 11. High-temperature flue gas waste heat recovery device 15 is further connected to RTO outlet pipe 9 via high-temperature duct 3 14, forming a complete flue gas circulation and waste heat recovery system.

[0033] like Figure 2 As shown, the internal structure of the electric RTO furnace 1 includes a combustion chamber 101, a heat storage area 102, an electric heater 103 and a thermal insulation layer 104. The thermal insulation layer 104 has a square structure at the bottom and a trapezoidal structure at the top. This design can optimize gas flow and improve purification efficiency. During the waste gas treatment process, the waste gas enters the RTO furnace from the first bed chamber, and the waste gas first passes through the heat storage body and obtains heat from the heat storage body to heat up, and then the waste gas passes through the trapezoidal structure insulation layer 104 on the upper part of the heat storage body and enters the combustion chamber 101. The waste gas is burned at high temperature in the combustion chamber 101. After high-temperature combustion, the gas passes through the trapezoidal structure insulation layer 104 of the second bed chamber and is discharged through the heat storage body of the second bed chamber. The main function of the third bed chamber is to purge the waste gas remaining in the heat storage body in the previous process into the combustion chamber 101 for combustion. As the process time extends, the temperature of the electric heater 103 gradually rises. When the temperature of the electric heater 103 reaches the set temperature, the RTO furnace switches the valve to enter the next process. The above process is completed in sequence during the operation of the RTO furnace. The trapezoidal structure on the upper part of the insulation layer 104 guides the exhaust gas flow in the combustion chamber 101 to a certain extent, so that the exhaust gas flows in a controllable direction, and the flow and distribution of the gas in the combustion chamber 101 are more uniform, thereby improving the purification efficiency of the RTO, avoiding dry burning damage to the heating tube caused by poor gas flow in the heating tube area, and reducing the gas flow resistance.

[0034] The heating tubes of the electric heater 103 are placed in the combustion chamber 101, either top-mounted or side-mounted, or both, to meet specific spatial layout requirements. This significantly reduces space, optimizes airflow distribution, and improves heating efficiency, meeting the needs of various application scenarios.

[0035] A temperature controller 12 is installed on the electric heater 103 to monitor and control the temperature of the electric heater 103. A temperature controller 13 is installed on the combustion chamber 101 to monitor and control the temperature of the combustion chamber 101. These two temperature controllers enable precise control of the heating process and the temperature within the combustion chamber 101, ensuring that the exhaust gas is fully combusted at an appropriate temperature.

[0036] The temperature controller 2 13 on the RTO furnace combustion chamber 101 is interlocked with the high temperature valve 2, that is, electrically connected, and controls the opening of the high temperature valve 2. The temperature setting value of the interlocking temperature controller 2 13 and the high temperature valve 2 is 850°C.

[0037] The second temperature controller 13 on the RTO furnace combustion chamber 101 is interlocked with the electric heater 103 and controls the output power of the electric heater 103. The temperature setting value of the interlocking temperature controller 13 and the electric heater 103 is 800°C.

[0038] The temperature controller 12 is interlocked with the electric heater 103, that is, electrically connected to protect the electric heater 103. When the temperature of the temperature controller 12 reaches the set value of 900°C, the electric heater 103 stops working.

[0039] Among them, the RTO inlet switching valve 16 and the RTO outlet switching valve 17 are interlocked with the temperature controller 12, that is, electrically connected. When the temperature of the temperature controller 12 reaches the set value of 875°C, the RTO inlet switching valve 16 and the RTO outlet switching valve 17 are switched to enter the next cycle.

[0040] Example 2

[0041] This embodiment is essentially the same as Example 1, differing in the installation method of electric heater 103. In this embodiment, electric heater 103 is side-mounted to accommodate various spatial layouts and design requirements. Side-mounted electric heater 103 also achieves uniform heating of exhaust gas within combustion chamber 101, improving purification efficiency.

[0042] In addition, this embodiment further optimizes the design of the high-temperature flue gas waste heat recovery device 15, thereby improving waste heat recovery efficiency. By recycling the heat energy in the high-temperature flue gas emitted by the RTO furnace, system energy consumption can be further reduced and energy utilization efficiency can be improved.

[0043] The following effects can be achieved by the electrically heated RTO organic waste gas treatment system of Examples 1 and 2:

[0044] The application scope of RTO technology has been expanded, so that enterprises that do not have fuel conditions can also use RTO technology to treat organic waste gas.

[0045] It reduces the floor space, reduces the system complexity, and improves the system reliability and stability.

[0046] The high-temperature flue gas waste heat recovery device 15 is used to recover and utilize waste heat, thereby improving energy utilization efficiency and reducing energy consumption.

[0047] The upper portion of the thermal insulation layer 104 adopts a trapezoidal structure, which optimizes gas flow, improves purification efficiency, and extends the service life of the electric heater 103.

[0048] The RTO switching valve is interlocked with the temperature controller of the electric heater. When the temperature of the electric heater reaches the set temperature value, the valve is switched, which increases the service life of the electric heater, reduces operating energy consumption, and avoids frequent switching of the RTO switching valve, thereby increasing the service life of the RTO valve and the stability of the RTO system operation.

[0049] The temperature controller enables precise control of the heating process and the temperature in the combustion chamber 101, ensuring that the exhaust gas is fully burned at a suitable temperature, thereby improving the purification effect.

[0050] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electrically heated RTO organic waste gas treatment system, characterized in that: include: Electric RTO furnace (1), high temperature valve (2), RTO inlet switching valve (16), RTO outlet switching valve (17), fan (3), fresh air valve (4), high temperature flue gas waste heat recovery device (15), exhaust pipe (5) and connecting pipes; wherein the exhaust gas inlet is connected to the fan (3) via an exhaust gas inlet pipe (6), and is connected to the electric RTO furnace (1) via an electric RTO inlet pipe (7); the electric RTO furnace (1) is connected to the exhaust pipe (5) via an electric RTO outlet pipe (9); the RTO inlet switching valve (16) is placed on the electric RTO inlet pipe (7), and the RTO outlet switching valve (17) is placed on the electric RTO outlet pipe (9); The fresh air valve (4) is connected to the exhaust gas inlet pipe (6) via the fresh air pipe (8), the electric RTO furnace (1) is connected to the high-temperature valve (2) via the high-temperature pipe 1 (10), the high-temperature valve (2) is connected to the high-temperature flue gas waste heat recovery device (15) via the high-temperature pipe 2 (11), and the high-temperature flue gas waste heat recovery device (15) is further connected to the electric RTO outlet pipe (9) via the high-temperature pipe 3 (14); The electric RTO furnace (1) comprises a combustion chamber (101), a heat storage area (102), an electric heater (103), and a heat insulation layer (104).

2. The electrically heated RTO organic waste gas treatment system according to claim 1, characterized in that: The lower portion of the thermal insulation layer (104) adopts a square structure, and the upper portion adopts a trapezoidal structure.

3. The electrically heated RTO organic waste gas treatment system according to claim 1, characterized in that: The heating tube of the electric heater (103) is placed in the combustion chamber (101), and the electric heater (103) is installed on the top and / or side.

4. The electrically heated RTO organic waste gas treatment system according to claim 1, characterized in that: A temperature controller 1 (12) is installed on the electric heater (103), and a temperature controller 2 (13) is installed on the combustion chamber (101).

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