Efficient preheating device for waste gas of RTO thermal oxidation furnace

Abstract

The utility model relates to an efficient waste gas preheating device for an RTO (Regenerative Thermal Oxidation) furnace, which comprises a rack, heat storage exchangers fixed at the upper end of the rack, an inspection support fixed between the heat storage exchangers, and circulating pipes fixed on the side surfaces of the heat storage exchangers. Heat of the heat accumulator can be utilized more efficiently to heat waste gas, the energy utilization rate is increased, heat release and heat accumulation of the heat accumulator are conducted at the same time, natural loss of the heat is reduced, the purpose of reheating the waste gas through the heat generated after waste gas combustion can be achieved, and efficient utilization of energy is ensured.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment, in particular to a high-efficiency preheating device for waste gas from an RTO thermal oxidation furnace. Background Art

[0002] With the rapid development of industry, the problem of waste gas emissions is becoming increasingly serious. Among the many waste gas treatment technologies, RTO has attracted much attention due to its efficient waste gas treatment capabilities. However, traditional RTO thermal oxidizers have problems such as low energy utilization and large natural heat loss during the waste gas preheating process. The waste gas needs to be preheated before entering the thermal oxidizer to improve combustion efficiency and reduce energy consumption. However, existing preheating devices often cannot make full use of the heat of the heat storage body, resulting in energy waste. During the heat release and heat storage process of the heat storage body, the asynchronous operation will increase heat loss and reduce the energy utilization efficiency of the entire system. In order to solve these problems, there is an urgent need for an RTO thermal oxidizer waste gas high-efficiency preheating device that can more efficiently utilize the heat of the heat storage body, realize simultaneous heat release and heat storage, and reduce natural heat loss, so as to improve energy utilization, ensure efficient energy utilization, and meet the environmental protection and energy-saving requirements for waste gas treatment in industrial production. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an efficient preheating device for exhaust gas from an RTO thermal oxidation furnace, which solves the problems existing in the existing technology. Through a carefully designed heat storage exchanger, the heat of the heat storage body can be used more efficiently to heat the exhaust gas, thereby improving the energy utilization rate. The heat release and heat storage of the heat storage body can be carried out simultaneously, reducing the natural loss of heat. The purpose of reheating the exhaust gas using the heat after the exhaust gas combustion can be achieved, thereby ensuring the efficient use of energy.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an RTO thermal oxidizer exhaust gas high-efficiency preheating device, comprising a frame, a heat storage exchanger fixed to the upper end of the frame, an inspection bracket fixed between the heat storage exchangers, and a flow pipe fixed to the side of the heat storage exchanger;

[0007] The heat storage exchanger includes a heat-insulating shell, a first inspection port fixed at the upper end of the heat-insulating shell, a second inspection port fixed at the upper end of the heat-insulating shell, a hanging ring fixed at the upper end of the heat-insulating shell, a cold exhaust gas vent fixed at the side of the heat-insulating shell, a hot exhaust gas vent fixed at the side of the heat-insulating shell, and a heat storage exchange body fixed inside the heat-insulating shell.

[0008] Preferably, the heat storage exchange body is made of stainless steel, with a fixing ring provided on the outside, a first heat exchange channel provided on the outermost side inside, a second heat exchange channel provided in the middle inside, and a third heat exchange channel provided on the innermost side.

[0009] Preferably, the first heat exchange channel and the third heat exchange channel protrude from the side surface of the heat storage exchange body.

[0010] Preferably, the heat-insulating shell has partitions symmetrically fixed on both sides.

[0011] Preferably, the outermost side of the partition is provided with a first vent connected to the first internal heat exchange channel, the middle is provided with a second vent connected to the outer cold exhaust gas vent, and the middle is provided with a third vent connected to the third internal heat exchange channel.

[0012] (3) Beneficial effects

[0013] The purpose of this utility model is to provide an efficient preheating device for exhaust gas from an RTO thermal oxidation furnace. The device adopts a structure that integrates heat absorption and heat release of a heat storage body, so that the efficiency of heating the exhaust gas is higher. Through this new exhaust gas heating device, efficient, uniform and stable heating of the exhaust gas can be achieved, ensuring that the exhaust gas can reach the pre-reaction temperature, reducing the energy consumption during exhaust gas combustion, and greatly reducing energy consumption. It is an innovative technology with broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the heat storage exchanger in the present utility model.

[0016] Figure 3 It is a schematic diagram of the cross section of the heat storage exchanger in the present invention.

[0017] Figure 4 It is a schematic diagram of the heat storage exchange body in the present utility model.

[0018] Figure 5 It is a schematic diagram of the heat-insulating shell in the utility model.

[0019] In the figure: 1-frame, 2-heat storage exchanger, 201-insulation shell, 2011-partition, 2012-first air vent, 2013-third air vent, 2014-second air vent, 202-first inspection port, 203-second inspection port, 204-lifting ring, 205-cold exhaust gas vent, 206-hot exhaust gas vent, 207-heat storage exchange body, 2071-fixing ring, 2072-first heat exchange channel, 2073-second heat exchange channel, 2074-third heat exchange channel, 3-inspection bracket, 4-circulation pipe. DETAILED DESCRIPTION

[0020] The following is a combination of the appended examples of the present invention Figure 1 -Attached Figure 5 The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments 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 work are within the scope of protection of the present invention.

[0021] The utility model provides a technical solution: an efficient preheating device for exhaust gas from an RTO thermal oxidizer, comprising a frame 1, a heat storage exchanger 2 fixed at the upper end of the frame 1, an inspection bracket 3 fixed between the heat storage exchangers 2, and a flow pipe 4 fixed at the side of the heat storage exchanger 2; the frame 1 provides a stable support structure for the entire device, ensuring that components such as the heat storage exchanger 2, the inspection bracket 3 and the flow pipe 4 can be firmly installed at its upper end, ensuring the stability and reliability of the entire preheating device during operation, the hot exhaust gas from the heat storage exchanger 2 completes heat release here, and the cold exhaust gas absorbs heat here and heats up to the pre-reaction temperature, the inspection bracket 3 provides a safe and stable inspection channel and platform for staff, facilitating staff to conduct daily inspections and monitoring of the entire preheating device, promptly discover problems in the operation of the equipment and deal with them, and ensure the normal operation of the equipment, the flow pipe 4 connects the two heat storage exchangers 2 to realize the circulation of exhaust gas in the entire preheating device and the gas transmission during the heat exchange process, ensuring that the exhaust gas can flow smoothly between the various components to complete the preheating process.

[0022] The heat storage exchanger 2 includes a heat-insulating shell 201, a first inspection port 202 fixed on the upper end of the heat-insulating shell 201, a second inspection port 203 fixed on the upper end of the heat-insulating shell 201, a lifting ring 204 fixed on the upper end of the heat-insulating shell 201, a cold exhaust gas vent 205 fixed on the side of the heat-insulating shell 201, a hot exhaust gas vent 206 fixed on the side of the heat-insulating shell 201 and a heat storage exchange body 207 fixed inside the heat-insulating shell 201; the heat-insulating shell 201 has an insulation effect on the internal heat storage exchange body 207, reduces the loss of heat to the external environment, improves the heat exchange efficiency, and ensures that the heat can be fully used for preheating the exhaust gas. The first inspection port 202 and the second inspection port 203 are convenient for staff to check when equipment fails. When there is a fault or maintenance is required, enter the heat storage exchanger 2 for inspection and repair, thereby improving the maintainability of the equipment. The lifting ring 204 facilitates lifting operations when the equipment is installed, disassembled or moved, thereby improving the convenience of equipment installation and transportation. The cold exhaust gas port 205 serves as the entrance for cold exhaust gas to enter the heat storage exchanger 2, and introduces the cold exhaust gas to be preheated into the interior of the device so that it exchanges heat with the heat storage exchange body 207. The hot exhaust gas port 206 is the channel for hot exhaust gas to enter, thereby realizing heat transfer and recycling. The heat storage exchange body 207 is the core component of the entire preheating device, and heat storage and transfer are realized through the heat exchange channel inside it, and the heat in the hot exhaust gas is transferred to the cold exhaust gas, thereby realizing efficient preheating of the exhaust gas.

[0023] The heat storage exchange body 207 is made of stainless steel, with a fixing ring 2071 on the outside, a first heat exchange channel 2072 on the outermost side inside, a second heat exchange channel 2073 in the middle, and a third heat exchange channel 2074 on the innermost side; the fixing ring 2071 fixes and supports the heat storage exchange body 207 to ensure that it will not deform or displace during operation, thereby ensuring the stability of heat exchange. The first heat exchange channel 2072, the second heat exchange channel 2073 and the third heat exchange channel 2074, different heat exchange channels provide specific flow paths for the exhaust gas, so that the cold exhaust gas and the hot exhaust gas can be heat exchanged in different channels, thereby improving the heat exchange efficiency, absorbing the heat of the hot exhaust gas after combustion into the heat storage exchange body 207 and transferring it to the cold exhaust gas, and heating the cold exhaust gas to the pre-reaction temperature.

[0024] The first heat exchange channel 2072 and the third heat exchange channel 2074 protrude from the side of the heat storage exchange body 207 , and are used to connect to the partition 2011 to introduce exhaust gas into the heat storage exchange body 207 .

[0025] The insulation shell 201 has partitions 2011 symmetrically fixed on both sides to divide the internal space of the insulation shell 201, guide the exhaust gas to flow along a specific path, ensure that the cold exhaust gas and the hot exhaust gas can enter different heat exchange channels through the corresponding vents respectively, and realize an orderly heat exchange process.

[0026] A first air vent 2012 is provided on the outermost side of the partition 2011, which is connected to the first heat exchange channel 2072 inside. A second air vent 2014 is provided in the middle, which is connected to the cold exhaust gas vent 205 on the outside. A third air vent 2013 is provided in the middle, which is connected to the third heat exchange channel 2074 inside. The first air vent 2012 connects the outer side of the partition 2011 with the first heat exchange channel 2072 inside, so that hot exhaust gas or gas passing through a specific path can enter the first heat exchange channel 2072 and participate in the heat exchange process. The second air vent 2014 connects the cold exhaust gas vent on the outside with the internal space, introduces the cold exhaust gas into the second heat exchange channel 2073, and provides a channel for the cold exhaust gas to enter the heat exchange channel. The third air vent 2013 connects the partition 2011 with the third heat exchange channel 2074 inside, so that hot exhaust gas can enter the third heat exchange channel 2074 and participate in the heat exchange process.

[0027] Working principle:

[0028] During operation, the hot exhaust gas after combustion is completed is passed into the hot exhaust gas port 206. At this time, the hot exhaust gas will fill the gap between the partition 2011 and the thermal insulation shell 201. After filling the gap, the hot exhaust gas flows into the first heat exchange channel 2072 and the third heat exchange channel 2074, transferring the heat to the stainless steel heat storage exchanger 207. After flowing through the first heat storage exchanger 207, it flows through the circulation pipe 4 to the next heat storage exchanger 207, and then flows out from the hot exhaust gas port 206. When the heat storage exchanger 207 reaches the preset temperature, the cold exhaust gas that needs to be preheated is introduced. The cold exhaust gas passes through the cold exhaust gas port 205 and the second heat exchange channel 2073. It will be heated by the heat storage exchanger 207, and then flows through the circulation pipe 4 to the next heat storage exchanger 207. After being heated, it flows out from the cold exhaust gas port 205.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient preheating device for exhaust gas from an RTO thermal oxidizer, characterized in that: It comprises a frame (1), a heat storage exchanger (2) fixed to the upper end of the frame (1), an inspection bracket (3) fixed between the heat storage exchangers (2), and a flow pipe (4) fixed to the side of the heat storage exchanger (2); The heat storage exchanger (2) comprises a heat-insulating shell (201), a first inspection port (202) fixed at the upper end of the heat-insulating shell (201), a second inspection port (203) fixed at the upper end of the heat-insulating shell (201), a lifting ring (204) fixed at the upper end of the heat-insulating shell (201), a cold exhaust gas vent (205) fixed at the side of the heat-insulating shell (201), a hot exhaust gas vent (206) fixed at the side of the heat-insulating shell (201), and a heat storage exchange body (207) fixed inside the heat-insulating shell (201).

2. The RTO thermal oxidation furnace exhaust gas high-efficiency preheating device according to claim 1 is characterized in that: The heat storage exchange body (207) is made of stainless steel, with a fixing ring (2071) provided on the outside, a first heat exchange channel (2072) provided on the outermost side, a second heat exchange channel (2073) provided in the middle, and a third heat exchange channel (2074) provided on the innermost side.

3. The RTO thermal oxidation furnace exhaust gas high-efficiency preheating device according to claim 2 is characterized in that: The first heat exchange channel (2072) and the third heat exchange channel (2074) protrude from the side of the heat storage exchange body (207).

4. The RTO thermal oxidation furnace exhaust gas high-efficiency preheating device according to claim 1 is characterized in that: The heat-insulating shell (201) has partitions (2011) symmetrically fixed on both sides.

5. The RTO thermal oxidation furnace exhaust gas high-efficiency preheating device according to claim 4 is characterized in that: The outermost portion of the partition (2011) is provided with a first vent (2012) connected to the first heat exchange channel (2072) inside, a second vent (2014) is provided in the middle, connected to the cold exhaust gas vent (205) on the outside, and a third vent (2013) is provided in the middle, connected to the third heat exchange channel (2074) inside.

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