Three-bed type RTO (Regenerative Thermal Oxidation) combustion equipment
The three-bed structure and the design of evenly dispersed exhaust gas flow rate solve the problem of uneven air intake in the heat storage body, achieve efficient exhaust gas purification and heat energy utilization, and reduce fuel consumption and equipment damage risks.
Patent Information
- Application Number
- CN202422603735.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-28
AI Technical Summary
In existing RTO regenerative combustion equipment, the uneven intake of exhaust gas into the regenerative body causes local overheating and overcooling, which affects the preheating level of the oxidation furnace and increases fuel and energy consumption.
A three-bed structure is adopted, and air distribution plates and air distribution holes are set to evenly disperse the exhaust gas flow rate and flow. Combined with the backblowing port and exhaust port design, the cyclic alternating operation of the heat storage chamber is realized, and the ceramic heat storage body and furnace lining are used to improve the thermal energy utilization rate.
It achieves uniform exhaust gas intake, reduces fuel consumption, increases purification rate to over 99%, extends equipment life, reduces operating costs, and improves thermal energy utilization and safety.
Smart Images
Figure CN223425287U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste gas treatment, in particular to a three-bed RTO regenerative combustion device. Background Art
[0002] The RTO (Regenerative Thermal Oxidizer) regenerative thermal oxidizer is a highly efficient organic waste gas treatment device. It oxidizes combustible waste gas into its corresponding oxides and water at high temperatures, thereby purifying the waste gas and recovering the heat released during decomposition. The RTO's main structure consists of a combustion chamber and a ceramic packing bed.
[0003] The regenerative incinerator uses thermal oxidation to treat low- and medium-concentration organic waste gas, and uses a ceramic regenerative bed heat exchanger to recover heat. Since the waste gas is concentrated and has a high flow rate when it flows in, it is easy to directly impact the local part of the ceramic regenerative body, resulting in excessive local heating and insufficient heating of other parts. Such uneven heat distribution will reduce the overall heat storage effect and affect the preheating level of the waste gas in the oxidation furnace. Long-term use may cause damage to the ceramic regenerative body. Most importantly, due to the uneven heat storage process, the burner needs to add more fuel, resulting in increased energy consumption and increased operating costs.
[0004] Therefore, there is an urgent need for a three-bed RTO regenerative combustion equipment to solve the above technical defects. Utility Model Content
[0005] The purpose of the utility model is to provide a three-bed RTO regenerative combustion equipment to solve the problem of uneven exhaust gas intake into the regenerative body proposed in the above background technology.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a three-bed RTO regenerative combustion device, comprising an oxidation furnace and a burner, wherein the bottom end of the oxidation furnace is supported by multiple groups of pillars, a burner is arranged above the oxidation furnace, and three groups of regenerative chambers are arranged below the oxidation furnace, and the regenerative chambers are respectively arranged as the first regenerative bed, the second regenerative bed and the third regenerative bed from right to left. Each group of regenerative chambers is fixed with a bracket from the bottom, and a ceramic regenerative body is supported and fixed on the bracket. An air distribution plate is installed at the bottom of the regenerative chamber, and multiple groups of uniform air distribution holes are distributed in the air distribution plate.
[0007] Preferably, the air distribution holes are circular holes, and the air distribution plate is placed under the ceramic heat storage body with a certain gap between the air distribution plate and the ceramic heat storage body.
[0008] Preferably, the heat storage chambers are distributed at equal intervals in the oxidation furnace, and the oxidation furnace is provided with three groups of inspection doors corresponding to the heat storage chambers on the back.
[0009] Preferably, an exhaust gas fan is installed on the right side of the front end of the oxidation furnace, the input end of the exhaust gas fan is connected to the exhaust port, the output end of the exhaust gas fan is connected to the exhaust gas main pipe, and three groups of air intake valves are provided at the exhaust gas main pipe. The output end of each group of air intake valves is connected upward to a branch air intake pipe, and the top end of the branch air intake pipe is connected to the input end of the high-pressure induced draft fan, and the high-pressure induced draft fans are respectively installed at the bottom ends of the three groups of heat storage chambers.
[0010] Preferably, a back-blowing port is further provided at the bottom end of the heat storage chamber, and each group of back-blowing ports is respectively installed with a back-blowing valve, and the output ends of the back-blowing valves are respectively connected to the back-blowing main pipe.
[0011] Preferably, an exhaust port is further provided at the bottom end of the heat storage chamber, an exhaust valve is installed at the bottom end of the exhaust port, and the exhaust valves are respectively assembled on the exhaust main pipes, and the output end of the exhaust main pipe is connected to the standard emission chimney.
[0012] Preferably, the upper half of the inner wall of the oxidation furnace is fitted with a furnace lining, and the upper half of the outer wall of the oxidation furnace is paved with an insulating outer layer.
[0013] Preferably, the furnace lining is made of high-alumina refractory brick material, and the thermal insulation outer layer is made of aluminum silicate fiber material.
[0014] Compared with the existing technology, the beneficial effects of the present invention are: the three-bed RTO regenerative combustion equipment not only realizes uniform exhaust gas intake into the regenerative body, reduces fuel consumption, improves the energy efficiency of the entire system, realizes cyclic alternating operation of the regenerative beds, and achieves a purification rate of more than 99%, but also achieves high thermal energy utilization, high safety, long service life, and easy maintenance;
[0015] (1) By providing a ceramic heat storage body, an air distribution plate, and air distribution holes, the exhaust gas first passes through the air distribution plate before entering the ceramic heat storage body. The air distribution plate preliminarily disperses the flow rate and flow of the exhaust gas, and then further evenly distributes the airflow through the air distribution holes. The exhaust gas then passes through the ceramic heat storage body, which can disperse the exhaust gas to the entire cross section before entering the ceramic heat storage body, thereby avoiding the local overheating and overcooling caused by the concentrated airflow directly impacting the ceramic heat storage body. The first heat storage bed stores the heat of the high-temperature gas from the burner and preheats the organic waste gas entering it. The organic waste gas preheated to a certain temperature undergoes an oxidation reaction in the oxidation furnace to generate carbon dioxide and water. The temperature of the entire heat storage chamber is more balanced through the removable air distribution plate, which reduces fuel consumption and improves the energy efficiency of the entire system.
[0016] (2) by setting the back flushing port, exhaust port, exhaust manifold, back flushing valve, exhaust valve, inlet valve, the first stage, the exhaust gas into the first regenerator bed, the third regenerator bed is through the back flushing port into the back flushing gas flow, organic waste gas in the oxidation furnace oxidation reaction, clean gas from the second regenerator bed blowout, make clean gas from the exhaust port and through the exhaust manifold finally discharged to the standard emission chimney, the second stage, the second regenerator bed carries out heat release, and sprays back flushing gas flow, and the second regenerator bed lets the exhaust gas enter, clean gas flow from the third regenerator bed, the third stage, the exhaust gas from the third regenerator bed enters, the back flushing gas flow from the second regenerator bed blows out, and the clean gas is discharged from the first regenerator bed, through each shunt pipeline, three groups of regenerator bed cycle alternately work, the operating cost is low, the fuel cost is low, and the purification rate is above 99%;
[0017] (3) by setting the furnace lining plate, the heat preservation outer layer, each regenerator chamber uses ceramic regenerator as the filler bed, the organic waste gas of alkanes, alkenes, alcohols, ketones, ethers, esters, aromatic hydrocarbons and benzene can have better heat storage effect, safety is high, the furnace lining plate on the inner wall of the oxidation furnace can reduce the high temperature damage of combustion to the oxidation furnace, the heat preservation outer layer outside the oxidation furnace can better save heat, heat energy utilization rate is high, safety is high, service life is long, and maintenance is easy. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the front view sectional structure schematic diagram of the utility model;
[0019] Figure 2 It is the air distribution plate top view structure schematic diagram of the utility model;
[0020] Figure 3 It is the regenerator chamber front view structure schematic diagram of the utility model;
[0021] Figure 4 It is the furnace lining plate local structure schematic diagram of the utility model.
[0022] In the drawing: 1, oxidation furnace; 2, combustor; 3, furnace lining plate; 4, heat preservation outer layer; 5, regenerator chamber; 6, exhaust fan; 7, exhaust port; 8, exhaust manifold; 9, inlet valve; 10, shunt inlet pipe; 11, high pressure induced draft fan; 12, exhaust valve; 13, exhaust port; 14, back flushing valve; 15, back flushing manifold; 16, support column; 17, back flushing port; 18, exhaust manifold; 19, standard emission chimney; 20, support; 21, ceramic regenerator; 22, air distribution plate; 23, air distribution hole. DETAILED DESCRIPTION
[0023] 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.
[0024] See also Figure 1-4 The utility model provides an embodiment: a three-bed RTO regenerative combustion equipment, including an oxidation furnace 1 and a burner 2, the bottom end of the oxidation furnace 1 supports multiple groups of pillars 16, the burner 2 is arranged above the oxidation furnace 1, and three groups of regenerative chambers 5 are arranged below the oxidation furnace 1. The regenerative chambers 5 are respectively arranged as a first regenerative bed, a second regenerative bed and a third regenerative bed from right to left. Each group of regenerative chambers 5 is fixed with a bracket 20 from the bottom, and a ceramic regenerative body 21 is supported and fixed on the bracket 20. An air distribution plate 22 is installed at the bottom of the regenerative chamber 5, and multiple groups of uniform air distribution holes 23 are distributed in the air distribution plate 22. The air distribution holes 23 are circular holes. The air distribution plate 22 is padded under the ceramic regenerative body 21 and a certain gap is left between the ceramic regenerative body 21.
[0025] Specifically, if Figure 1 、 Figure 2 and Figure 3 As shown, the ceramic heat storage body 21 in the heat storage chamber 5 is used for heat storage and heat release. When the exhaust gas fan 6 draws the exhaust gas in the exhaust port 7 and sends it into the high-pressure induced draft fan 11 through the branch air inlet pipe 10, the high-pressure induced draft fan 11 pressurizes and increases the air flow rate. Before the exhaust gas enters the ceramic heat storage body 21, it first passes through the wind uniformity plate 22. The wind uniformity plate 22 preliminarily disperses the flow rate and flow of the exhaust gas, and then further evenly distributes the air flow through the air distribution holes 23. After passing through the ceramic heat storage body 21, the exhaust gas can be dispersed to the entire cross-section before entering the ceramic heat storage body 21, avoiding the local overheating and overcooling caused by the concentrated airflow directly impacting the ceramic heat storage body 21. The first heat storage bed will store the heat of the high-temperature gas coming out of the burner 2, and preheat the organic waste gas entering it. The organic waste gas preheated to a certain temperature ≥760°C undergoes an oxidation reaction in the oxidation furnace 1 to generate carbon dioxide and water.
[0026] The regenerative chambers 5 are distributed at equal intervals in the oxidation furnace 1, the oxidation furnace 1 is provided with three groups of maintenance doors corresponding to the regenerative chambers 5 at the back, the oxidation furnace 1 is provided with a waste gas fan 6 at the front right side, the input end of the waste gas fan 6 is connected to a waste gas port 7, the output end of the waste gas fan 6 is connected to a waste gas main pipe 8, the waste gas main pipe 8 is provided with three groups of air inlet valves 9, the output end of each group of air inlet valves 9 is connected to a shunt air inlet pipe 10 upwards, the top end of the shunt air inlet pipe 10 is connected to the input end of a high-pressure induced draft fan 11, the high-pressure induced draft fan 11 is installed at the bottom end of each group of regenerative chambers 5, the bottom end of the regenerative chamber 5 is also provided with a back blowing port 17, each group of back blowing ports 17 is provided with a back blowing valve 14, the output end of the back blowing valve 14 is connected to a back blowing main pipe 15, the bottom end of the regenerative chamber 5 is also provided with an exhaust port 13, the exhaust port 13 is provided with an exhaust valve 12 at the bottom end, the exhaust valve 12 is assembled in an exhaust main pipe 18, the output end of the exhaust main pipe 18 is connected to a standard emission chimney 19;
[0027] Specifically, as shown in Figure 1 and Figure 3 , in the first stage, the waste gas enters the first regenerative bed, the third regenerative bed is blown into the back blowing gas flow through the back blowing port 17, the organic waste gas is oxidized in the oxidation furnace 1, the clean gas after oxidation is blown out from the second regenerative bed, the clean gas is discharged from the exhaust port 13 and finally discharged to the standard emission chimney 19 through the exhaust main pipe 18, in the second stage, the second regenerative bed releases heat and sprays the back blowing gas flow, while the second regenerative bed allows the waste gas to enter, the clean gas flow is discharged from the third regenerative bed, in the third stage, the waste gas enters from the third regenerative bed, the back blowing gas flow is blown out from the second regenerative bed, and the clean gas is discharged from the first regenerative bed, through the shunt pipes, the three groups of regenerative beds work in a cycle and alternately.
[0028] The upper half of the inner wall of the oxidation furnace 1 is fitted with a furnace lining plate 3, the upper half of the outer wall of the oxidation furnace 1 is paved with a heat preservation outer layer 4, the furnace lining plate 3 is made of high alumina refractory brick material, and the heat preservation outer layer 4 is made of aluminum silicate fiber material;
[0029] Specifically, as shown in Figure 1 and Figure 4 , each group of regenerative chambers 5 uses ceramic regenerative body 21 as filler bed, which has better heat storage effect on hydrocarbon organic waste gas such as alkanes, alkenes, alcohols, ketones, ethers, esters, aromatic hydrocarbons and benzene, and is safe, the furnace lining plate 3 on the inner wall of the oxidation furnace 1 can reduce the high temperature damage of combustion to the oxidation furnace 1, and the heat preservation outer layer 4 on the outside of the oxidation furnace 1 can better save heat.
[0030] Working principle: In the first stage, the exhaust gas enters the first regenerator bed, and the third regenerator bed enters the back-blowing airflow through the back-blowing port 17. The organic waste gas undergoes an oxidation reaction in the oxidation furnace 1, and the oxidized clean gas is blown out from the second regenerator bed, so that the clean gas is discharged from the exhaust port 13 and finally discharged to the standard emission chimney 19 through the exhaust main pipe 18. In the second stage, the second regenerator bed releases heat and sprays back-blowing airflow, while the second regenerator bed allows exhaust gas to enter, and the clean airflow is discharged from the third regenerator bed. In the third stage, exhaust gas enters from the third regenerator bed, back-blowing airflow is blown out from the second regenerator bed, and clean gas is discharged from the first regenerator bed. Through the various branch pipes, the three groups of regenerator beds work alternately in a cycle.
[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
Claims
1. A three-bed RTO regenerative combustion device, comprising an oxidation furnace (1) and a burner (2), characterized in that: The bottom end of the oxidation furnace (1) is supported by multiple groups of pillars (16), a burner (2) is arranged above the oxidation furnace (1), and three groups of heat storage chambers (5) are arranged below the oxidation furnace (1). The heat storage chambers (5) are respectively arranged as a first heat storage bed, a second heat storage bed and a third heat storage bed from right to left. Each group of heat storage chambers (5) is fixed with a bracket (20) from the bottom, and a ceramic heat storage body (21) is supported and fixed on the bracket (20). An air distribution plate (22) is installed at the bottom end of the heat storage chamber (5), and multiple groups of uniform air distribution holes (23) are distributed in the air distribution plate (22).
2. The three-bed RTO regenerative combustion equipment according to claim 1, characterized in that: The air distribution holes (23) are circular holes, and the air distribution plate (22) is placed below the ceramic heat storage body (21) with a certain gap between the air distribution plate and the ceramic heat storage body (21).
3. The three-bed RTO regenerative combustion equipment according to claim 1, characterized in that: The heat storage chambers (5) are distributed at equal intervals in the oxidation furnace (1), and the oxidation furnace (1) is provided with three groups of inspection doors corresponding to the heat storage chambers (5) on the back.
4. The three-bed RTO regenerative combustion equipment according to claim 1, characterized in that: An exhaust fan (6) is installed on the right side of the front end of the oxidation furnace (1), the input end of the exhaust fan (6) is connected to the exhaust port (7), the output end of the exhaust fan (6) is connected to the exhaust main pipe (8), and three groups of air intake valves (9) are provided at the exhaust main pipe (8), and the output end of each group of air intake valves (9) is connected upward to a branch air intake pipe (10), and the top end of each branch air intake pipe (10) is connected to the input end of a high-pressure induced draft fan (11), and the high-pressure induced draft fan (11) is respectively installed at the bottom end of the three groups of heat storage chambers (5).
5. The three-bed RTO regenerative combustion equipment according to claim 1, characterized in that: The bottom end of the heat storage chamber (5) is also provided with a back-blowing port (17), and each group of back-blowing ports (17) is respectively installed with a back-blowing valve (14), and the output end of the back-blowing valve (14) is respectively connected to the back-blowing main pipe (15).
6. The three-bed RTO regenerative combustion equipment according to claim 1, characterized in that: The bottom end of the heat storage chamber (5) is also provided with an exhaust port (13), the bottom end of the exhaust port (13) is installed with an exhaust valve (12), and the exhaust valve (12) is respectively assembled on an exhaust main pipe (18), and the output end of the exhaust main pipe (18) is connected to a standard exhaust chimney (19).
7. The three-bed RTO regenerative combustion equipment according to claim 1, characterized in that: The upper half of the inner wall of the oxidation furnace (1) is fitted with a furnace lining plate (3), and the upper half of the outer wall of the oxidation furnace (1) is paved with a heat-insulating outer layer (4).
8. The three-bed RTO regenerative combustion equipment according to claim 7, characterized in that: The furnace lining (3) is made of high-alumina refractory brick material, and the thermal insulation outer layer (4) is made of aluminum silicate fiber material.