Electric heating heat accumulating type waste gas oxidizing furnace

Abstract

The utility model provides an electric heating heat accumulating type waste gas oxidizing furnace, which relates to the application field of industrial waste gas treatment technology and comprises a waste gas channel and a purified gas channel which are arranged in parallel up and down, and a first connecting channel and a second connecting channel are arranged between the waste gas channel and the purified gas channel at an interval; two ends of the furnace body are respectively a first waste gas standing area and a second waste gas standing area, the middle of the furnace body is an electric heating area, and two sides of the electric heating area are respectively provided with a first heat storage area and a second heat storage area; a first channel switching device and a second channel switching device are respectively arranged in the first connecting channel and the second connecting channel, and the first channel switching device is used for switching the first waste gas standing area to be communicated with the waste gas channel or the purified gas channel; the second connecting channel is used for switching the second waste gas standing area to be communicated with the waste gas channel or the purified gas channel, and gas can be cyclically oxidized and decomposed for multiple times to at least solve the problem of huge power consumption of an oxidizing furnace in the prior art.

Description

Technical Field

[0001] The utility model relates to the application field of industrial waste gas treatment technology, and in particular to an electrically heated heat storage type waste gas oxidation furnace. Background Art

[0002] At present, most domestic organic waste gas oxidation furnaces use combustion to oxidize and decompose, which produces a lot of carbon emissions and causes certain pollution to the atmosphere. Some manufacturers also use electric heating oxidation furnaces, but the heating form is basically direct heating, which directly heats the room temperature or low temperature organic waste gas to about 750℃ for oxidation and decomposition, consuming huge electricity. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and to design an electrically heated thermal storage exhaust gas oxidation furnace to at least solve the problem of huge power consumption of the oxidation furnace in the prior art.

[0004] According to an embodiment of the utility model, an electrically heated heat storage type exhaust gas oxidation furnace comprises: an exhaust gas channel and a purified gas channel are arranged in parallel up and down, a first connecting channel and a second connecting channel are arranged between the exhaust gas channel and the purified gas channel; a furnace body, two ends of the furnace body are respectively a first exhaust gas static zone and a second exhaust gas static zone, the middle of the furnace body is an electric heating zone, and the two sides of the electric heating zone are respectively provided with a first heat storage zone and a second heat storage zone; the first connecting channel is used to connect the exhaust gas channel and the purified gas channel with the first exhaust gas static zone; the second connecting channel is used to connect the exhaust gas channel and the purified gas channel with the second exhaust gas static zone; a first channel switching device and a second channel switching device are also respectively arranged in the first connecting channel and the second connecting channel, the first channel switching device is used to switch the first exhaust gas static zone to be connected with the exhaust gas channel or the purified gas channel, and the second connecting channel is used to switch the second exhaust gas static zone to be connected with the exhaust gas channel or the purified gas channel.

[0005] Furthermore, one end of the waste gas channel is a waste gas inlet and the other end is closed; one end of the purified gas channel is a purified gas outlet.

[0006] Furthermore, a circular air outlet is provided on the upper and lower surfaces of the first connecting channel and the second connecting channel, and the upper and lower air outlets are concentric circles. The circular air outlets on the upper surfaces of the first connecting channel and the second connecting channel are connected to the upper purified gas channel, and the circular air outlets on the lower surfaces of the first connecting channel and the second connecting channel are connected to the lower exhaust gas channel.

[0007] Furthermore, the first channel switching device and the second channel switching device are lift-type fungus-shaped valves, whose fungus-shaped valve bodies move up and down between the two air ports, and the fungus-shaped valve bodies can be tightly combined with the upper and lower circular air ports.

[0008] Furthermore, the first channel switching device and the second channel switching device may also be replaced by electronic valves to control the opening and closing of the upper and lower air outlets of the first connecting channel and the second connecting channel.

[0009] Further, a cylinder is arranged at the upper end of the lifting type fungus-shaped valve, and the cylinder is connected with the fungus-shaped valve body at the lower end through a connecting rod in the middle.

[0010] The further electric heating zone includes an electric heater installed at the top of the electric heating zone, and the electric heating zone is located in the middle of the furnace body and is used for gas heating.

[0011] Further, there are a first heat storage zone and a second heat storage zone, wherein the first heat storage zone is located in the first exhaust gas static zone on one side of the electric heating zone, and is used for preheating the gas or absorbing the heat of the gas, and the second heat storage zone is located in the second exhaust gas static zone on the other side of the electric heating zone, and is used for preheating the gas or absorbing the heat of the gas.

[0012] Compared with the prior art, the utility model provides an electrically heated thermal storage exhaust gas oxidation furnace, which has the following beneficial effects:

[0013] 1. In the utility model, since the organic waste gas is circulated and heated in the electrically heated thermal storage waste gas oxidation furnace, a large amount of heat will be generated when the waste gas undergoes oxidation and cracking reactions. After circulating for a certain period of time, the heat generated by the electric heater can be partially or completely replaced by the heat generated by the organic waste gas itself, thereby maintaining the continuous oxidation and cracking reactions of the organic waste gas. At this time, the electric heater can reduce the power, greatly reducing the electric energy consumed by the equipment operation.

[0014] 2. The electrically heated heat storage exhaust gas oxidation furnace produced by the technical solution of the utility model adopts the form of ceramic heat storage and electric heating, and the structure of a lifting fungus-shaped valve combined with a three-layer air duct, which reduces carbon emissions during the oxidation process of organic waste gas, saves electricity consumption, and has no waste gas leakage, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a structural schematic diagram of the electric heating thermal storage type exhaust gas oxidation furnace of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the lift type fungus type valve of the utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the electric heating thermal storage type exhaust gas oxidation furnace of the utility model;

[0019] Figure 4 It is a side view of the electrically heated thermal storage exhaust gas oxidation furnace of the utility model;

[0020] The above drawings include the following reference numerals:

[0021] 10. Exhaust gas channel; 11. Exhaust gas inlet; 12. Second connecting channel; 13. First connecting channel; 14. Purified gas channel; 15. Purified gas outlet; 131. Lifting mushroom-shaped valve; 1311. Cylinder; 1312. Mushroom-shaped valve body; 1313. Connecting rod; 20. Second exhaust gas stilling area; 21. First exhaust gas stilling area; 22. First heat storage area; 23. Second heat storage area; 24. Electric heating area; 25. Electric heater. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] According to the utility model embodiment, the electrically heated thermal storage exhaust gas oxidation furnace is as follows Figure 1-Figure 4 As shown, an exhaust gas channel and a purified gas channel 14 are arranged in parallel up and down, and a first connecting channel 13 and a second connecting channel 12 are arranged between the exhaust gas channel 10 and the purified gas channel 14; a furnace body, two ends of the furnace body are respectively a first exhaust gas static zone 21 and a second exhaust gas static zone 20, the middle of the furnace body is an electric heating zone 24, and the two sides of the electric heating zone 24 are respectively provided with a first heat storage zone 22 and a second heat storage zone 23; the first connecting channel 13 is used to connect the exhaust gas channel 10 and the purified gas channel 14 with the first exhaust gas static zone 21; the second connecting channel 12 is used to connect the exhaust gas channel 10 and the purified gas channel 14 with the second exhaust gas static zone 20; the first connecting channel 13 and the second connecting channel 12 are also respectively provided with a first channel switching device and a second channel switching device, the first channel switching device is used to switch the first exhaust gas static zone 21 to be connected with the exhaust gas channel 10 or the purified gas channel 14, and the second connecting channel 12 is used to switch the second exhaust gas static zone 20 to be connected with the exhaust gas channel 10 or the purified gas channel 14.

[0024] When the electrically heated thermal storage exhaust gas oxidation furnace is designed in this way to treat organic waste gas, the waste gas first enters the waste gas channel 10 from the waste gas inlet 11. At this time, the mushroom-shaped valve of the first channel switching device is lifted to block the upper air port, and the mushroom-shaped valve of the second channel switching device is lowered to block the lower air port, so that the waste gas channel 10 is connected with the first connecting channel 13. The waste gas enters the first waste gas static area 21 from the first connecting channel 13. After the wind speed is reduced in this area, it enters the first heat storage area 22 for preheating and heating, and then enters the electric heating area 24 to be heated to 750-800°C, and the organic waste gas is oxidized at high temperature and decomposed into CO2 and H2O. The high-temperature gas after decomposition enters the second heat storage area 23 to release heat, so that its own temperature is reduced, and then enters the second waste gas static area 20 and is discharged to the second connecting channel 12. At this time, since the mushroom-shaped valve of the second channel switching device blocks the lower air port, the second connecting channel 12 is connected with the purified gas channel 14, so that the oxidized clean gas is discharged from the purified gas channel 14 to the atmosphere, which is a cycle.

[0025] At the beginning of the second cycle, the mushroom-shaped valve of the first connecting channel 13 is lowered, and the mushroom-shaped valve of the second connecting channel 12 is raised, so that the exhaust channel 10 is connected with the second connecting channel 12, and the organic waste gas enters the second exhaust gas static area 20 through the second connecting channel 12. At this time, the second heat storage area 23 absorbs the heat of the previous cycle. When the low-temperature exhaust gas passes through, the heat storage ceramic releases heat, and the low-temperature exhaust gas absorbs heat and the temperature rises. Then it enters the electric heating area 24 for high-temperature oxidation, which greatly reduces the electric energy required for oxidation and heating. The oxidized high-temperature gas enters the first heat storage area 22 for heat release, stores the heat in the ceramic heat storage body to reduce its own temperature, and then enters the first connecting channel 13 through the first exhaust gas static area 21. At this time, the mushroom-shaped valve of the first channel switching device blocks the lower air outlet, the air outlet between the first connecting channel 13 and the exhaust channel 10 is closed, and the air outlet between the second connecting channel and the purified gas channel 14 is opened, so that the oxidized clean gas is discharged from the purified gas channel 14 to the atmosphere. In this way, the purpose of treating the exhaust gas is achieved by alternating cycles.

[0026] When implementing Figure 1 One end of the waste gas channel 10 is a waste gas inlet 11, and the other end is closed; one end of the purified gas channel 14 is a purified gas outlet 15, and the other end is closed. This design can prevent gas overflow.

[0027] When implementing Figure 3 The upper and lower surfaces of the first connecting channel 13 and the second connecting channel 12 are shown to be provided with a circular air outlet, and the upper and lower air outlets are concentric circles. The circular air outlets on the upper surfaces of the first connecting channel 13 and the second connecting channel 12 are connected to the upper purified gas channel 14, and the circular air outlets on the lower surfaces of the first connecting channel 13 and the second connecting channel 12 are connected to the lower exhaust gas channel 10. This design can accurately control gas emissions so that the purified gas is not polluted.

[0028] When implementing Figure 2 The first channel switching device and the second channel switching device shown are a lift-type fungus-shaped valve 131. The fungus-shaped valve body 1312 of the lift-type fungus-shaped valve moves up and down between the two air outlets. The fungus-shaped valve body 1312 can be tightly combined with the upper and lower circular air outlets. This design makes the use of the fungus-shaped valve during operation more consistent with the circular seal and has a better sealing effect than traditional sealing valves.

[0029] In specific implementation, the first channel switching device and the second channel switching device can also be replaced by electronic valves to control the opening and closing of the upper and lower air outlets of the first connecting channel 13 and the second connecting channel 12.

[0030] When implementing Figure 2 The upper end of the poppet-type fungus-shaped valve 131 shown is provided with a cylinder 1311, which is connected to the lower end fungus-shaped valve body 1312 through a middle connecting rod 1313. Air pressure is used to control the lifting of the valve body instead of traditional mechanical control to avoid gas overflow due to mechanical failure.

[0031] When implementing Figure 1 The electric heating zone 24 shown includes an electric heater 25 installed on the top of the electric heating zone 24. The electric heating zone 24 is located in the middle of the furnace body and is used for gas heating. During operation, the gas is discharged from one side of the furnace body to the other side and can fully contact with the heating zone located in the middle of the furnace body, thereby improving the gas purification rate.

[0032] When implementing Figure 1 The first heat storage area 22 and the second heat storage area 23 are shown. The first heat storage area 22 is located in the first exhaust gas static area 21 on one side of the electric heating area 24, and is used to preheat the gas or absorb the heat of the gas. The second heat storage area 23 is located in the second exhaust gas static area 20 on the other side of the electric heating area 24, and is used to preheat the gas or absorb the heat of the gas. The heat storage area uses heat storage ceramics. During operation, when the gas temperature is lower than the temperature of the heat storage ceramics, the heat stored in the heated heat storage ceramics can preheat the gas, reducing the energy consumption of heating the gas in the heating area. If the gas temperature is higher than the temperature of the heat storage ceramics, the heat storage ceramics can absorb the gas heat for storage.

[0033] The above technical scheme only reflects the preferred technical scheme of the technical scheme of the utility model. Some changes that may be made to some parts thereof by technicians in this technical field all reflect the principles of the utility model and belong to the protection scope of the utility model. It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. An electrically heated thermal storage exhaust gas oxidation furnace, characterized in that: include: A purified gas channel (14) and an exhaust gas channel (10) are arranged in parallel up and down, and a first connecting channel (13) and a second connecting channel (12) are arranged in the interval between the exhaust gas channel (10) and the purified gas channel (14); A furnace body, wherein two ends of the furnace body are respectively a first exhaust gas static zone (21) and a second exhaust gas static zone (20), the middle of the furnace body is an electric heating zone (24), and two sides of the electric heating zone (24) are respectively provided with a first heat storage zone (22) and a second heat storage zone (23); The first connecting channel (13) is used to connect the exhaust gas channel (10) and the purified gas channel (14) with the first exhaust gas static zone (21); The second connecting channel (12) is used to connect the exhaust gas channel (10) and the purified gas channel (14) with the second exhaust gas static zone (20); A first channel switching device and a second channel switching device are also provided in the first connecting channel (13) and the second connecting channel (12), respectively. The first channel switching device is used to switch the first exhaust gas static zone (21) to be connected with the exhaust gas channel (10) or the purified gas channel (14), and the second connecting channel (12) is used to switch the second exhaust gas static zone (20) to be connected with the exhaust gas channel (10) or the purified gas channel (14).

2. The electrically heated thermal storage exhaust gas oxidation furnace according to claim 1, characterized in that: One end of the exhaust gas channel (10) is an exhaust gas inlet (11), and the other end is closed; one end of the purified gas channel (14) is a purified gas outlet (15), and the other end is closed.

3. The electrically heated thermal storage exhaust gas oxidation furnace according to claim 1, characterized in that: An air outlet is provided on the upper and lower surfaces of the first connecting channel (13) and the second connecting channel (12), and the upper and lower circular air outlets are concentric circles. The circular air outlets on the upper surfaces of the first connecting channel (13) and the second connecting channel (12) are in communication with the purified gas channel (14), and the circular air outlets on the lower surfaces of the first connecting channel (13) and the second connecting channel (12) are in communication with the exhaust gas channel (10).

4. The electrically heated thermal storage exhaust gas oxidation furnace according to claim 1, characterized in that: The first channel switching device and the second channel switching device are lift-type fungus-shaped valves (131), and the fungus-shaped valve body (1312) of the lift-type fungus-shaped valve (131) moves up and down between two circular air ports, and the fungus-shaped valve body (1312) can be tightly combined with the upper and lower circular air ports.

5. The electrically heated thermal storage exhaust gas oxidation furnace according to claim 4, characterized in that: The upper end of the lift-type mushroom-shaped valve (131) is provided with a cylinder (1311), and the cylinder (1311) is connected to the mushroom-shaped valve body (1312) at the lower end via a connecting rod (1313) in the middle.

6. The electrically heated thermal storage exhaust gas oxidation furnace according to claim 1, characterized in that: An electric heater (25) for heating gas is installed at the top of the electric heating zone (24).

7. The electrically heated thermal storage exhaust gas oxidation furnace according to claim 1, characterized in that: The first heat storage area (22) is located in the first exhaust gas static area (21) on one side of the electric heating area (24) and is used for preheating gas or absorbing gas heat. The second heat storage area (23) is located in the second exhaust gas static area (20) on the other side of the electric heating area (24) and is used for preheating gas or absorbing gas heat.

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