Waste gas incinerator and waste gas incineration system

Abstract

The utility model discloses a waste gas incinerator and a waste gas incineration system, and belongs to the technical field of waste gas treatment equipment. The waste gas incinerator comprises an incinerator body which is integrally of a jacket structure and comprises an inner incinerator body and an outer incinerator body. A combustion chamber is formed in the inner furnace body, and a waste gas channel is formed between the inner furnace body and the outer furnace body; the combustion chamber is provided with a plurality of partition plates which are sequentially located on the upper portion and the lower portion of the inner furnace body in a staggered mode. The waste gas channel is communicated with the combustion chamber through the waste gas outlet, and the flow direction of waste gas in the waste gas channel is opposite to that of high-temperature flue gas in the combustion chamber. Through the arrangement of the waste gas channel, waste gas can firstly enter the waste gas channel for heat exchange and temperature rise before entering the combustion chamber for combustion, and the heat utilization rate of the hearth can be effectively improved. And meanwhile, through the arrangement of the partition plate, the retention time of the waste gas in the incinerator can be effectively prolonged, and sufficient combustion of the waste gas is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment equipment, and more specifically relates to a waste gas incinerator and a waste gas incineration system. Background Art

[0002] A large amount of waste gas is generated during industrial production, which not only pollutes the atmospheric environment, but also causes great harm to human health. Therefore, industrial waste gas needs to be treated into harmless gas that meets the standards before it can be discharged. Waste gas treatment methods include incineration, adsorption, washing and membrane separation. Among them, the incineration method has strong adaptability and high treatment efficiency, and can meet the needs of various types of waste gas treatment.

[0003] Waste gas incinerator is a device that uses the heat generated by the combustion of auxiliary gas to raise the temperature of combustible harmful gases to the reaction temperature, thereby causing oxidation and decomposition. Existing waste gas incinerators often have the problem of high energy consumption and poor heat utilization. Therefore, how to improve the heat utilization rate of waste gas incinerators to improve combustion efficiency and reduce energy consumption has important production practical significance.

[0004] After searching, the patent CN211781147U discloses a flue gas incinerator. The incinerator includes an incineration chamber, an incinerator, an exhaust gas external inlet, an air outlet, a bypass valve, a heat exchanger and an air buffer chamber; the incinerator is a horizontal incinerator, the incineration chamber is arranged at the center of the incinerator, the incinerator is arranged at one end of the incinerator, a protective layer is arranged on the outer side of the incinerator, a high-temperature flue gas outlet and an exhaust gas internal inlet are arranged at one end of the incinerator, the high-temperature flue gas outlet is connected to a vent pipe, the vent pipe is connected to the air buffer chamber, the vent pipe passes through the outside of the heat exchanger, the exhaust gas external inlet is arranged on the incinerator shell, the exhaust gas external inlet is connected to the heat exchanger through a heat exchange pipe, the heat exchange pipe is connected to the exhaust gas internal inlet and connected to the incineration chamber, the air outlet is connected to the other end of the incinerator through a bypass valve, and the vent pipe is connected to the bypass valve.

[0005] Although the above application can utilize the heat of high-temperature flue gas to improve the heat utilization rate of the entire incinerator system, it cannot fully utilize the heat of the incinerator itself. Therefore, there is still room for optimization. Utility Model Content

[0006] 1. Problems to be solved

[0007] In view of at least some of the problems existing in the above prior art, the utility model proposes a waste gas incinerator and a waste gas incineration system. The waste gas incinerator of the utility model can not only make full use of the temperature in the furnace, but also prolong the residence time of the waste gas in the furnace, thereby promoting the full combustion of the waste gas.

[0008] 2. Technical solution

[0009] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0010] The utility model discloses a waste gas incinerator, comprising a furnace body, wherein the furnace body is a jacket structure as a whole, and comprises an inner furnace body and an outer furnace body; a combustion chamber is formed in the inner furnace body, and a waste gas channel is formed between the inner and outer furnace bodies;

[0011] The combustion chamber is provided with a plurality of partitions, and the plurality of partitions are sequentially and alternately located at the upper and lower parts of the inner furnace body;

[0012] The exhaust gas channel is connected to the combustion chamber through the exhaust gas outlet, and the flow direction of the exhaust gas in the exhaust gas channel is opposite to the flow direction of the high-temperature flue gas in the combustion chamber.

[0013] Furthermore, one end of the furnace body is a heat source end, which is provided with a burner and a combustion-supporting gas inlet; the other end is provided with a smoke outlet, and the waste gas inlet and the smoke outlet are located at the same end of the furnace body.

[0014] Furthermore, there are three partitions, wherein the exhaust gas outlet is arranged on the peripheral wall of the heat source end of the combustion chamber.

[0015] The utility model also provides a waste gas incineration system, which includes the waste gas incinerator mentioned above, wherein:

[0016] The heat source end is provided with an automatic ignition system, the burner is connected to the fuel source through a fuel pipeline, the auxiliary fuel gas inlet is connected to the auxiliary fuel gas through the auxiliary fuel gas pipeline, the exhaust gas inlet is connected to the exhaust gas source through the exhaust gas pipeline, and the smoke outlet is connected to the smoke gas pipeline.

[0017] Furthermore, a first heat exchanger is provided on the exhaust gas pipeline, and a heat source channel of the first heat exchanger is connected to the flue gas pipeline, so as to heat the exhaust gas before it enters the exhaust gas channel.

[0018] Furthermore, a second heat exchanger is provided on the combustion-supporting gas pipeline, and a heat source channel of the second heat exchanger is connected to the flue gas pipeline, so as to heat the combustion-supporting gas before it enters the combustion chamber.

[0019] Furthermore, the first heat exchanger and the second heat exchanger are arranged in series on the flue gas duct, and the first heat exchanger is located in front of the second heat exchanger.

[0020] Furthermore, a ball valve and a flow meter are provided on the fuel pipeline; wherein the flow meter is used to monitor the flow of fuel in the fuel pipeline, and the ball valve is used to control the opening and closing of the fuel pipeline.

[0021] Furthermore, a thermometer and a pressure gauge are provided on the furnace body for real-time monitoring of the temperature and pressure in the combustion chamber.

[0022] Furthermore, the fuel source is natural gas, and the combustion-supporting gas is air; fans are provided on the combustion-supporting gas pipeline, the exhaust gas pipeline and the smoke gas pipeline.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] (1) The utility model provides a waste gas incinerator, which, through the setting of the waste gas channel, allows the waste gas to enter the waste gas channel for heat exchange and temperature rise before entering the combustion chamber for combustion, which can effectively improve the heat utilization rate of the furnace; at the same time, a plurality of fire barriers are arranged in an upper and lower staggered manner, which increases the residence time of the waste gas in the incinerator and is conducive to the complete combustion of the waste gas.

[0026] (2) The waste gas incineration system of the utility model can make full use of the heat energy of the high-temperature flue gas after combustion through the arrangement of the first heat exchanger and the second heat exchanger; at the same time, through the arrangement of the waste gas channel, the heat energy of the furnace can be fully utilized, thereby improving the energy utilization rate of the entire system. In addition, the waste gas passes through the first heat exchanger and the waste gas channel for secondary heat exchange and temperature increase, which reduces the time for the waste gas to absorb heat and heat up after entering the combustion chamber, so that the temperature of the waste gas is sufficiently close to the ignition point, which is conducive to promoting the combustibility of the waste gas; especially for some low calorific value waste gases, it can greatly improve their combustion sufficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a waste gas incinerator of the utility model;

[0028] Figure 2 The utility model is a schematic structural diagram of a waste gas incineration system.

[0029] In the figure: 1, furnace body; 11, inner furnace body; 12, outer furnace body; 13, exhaust gas channel; 131, exhaust gas inlet; 132, exhaust gas outlet; 14, combustion chamber; 15, partition; 16, burner; 17, combustion gas inlet; 18, flue gas outlet;

[0030] 2. Automatic ignition system; 3. Fuel pipeline; 31. Ball valve; 32. Flow meter; 4. Combustion-supporting gas pipeline; 41. Second heat exchanger; 5. Exhaust gas pipeline; 51. First heat exchanger; 6. Flue gas pipeline; 7. Thermometer; 8. Pressure gauge; 9. Fan. DETAILED DESCRIPTION

[0031] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] The utility model is further described below in conjunction with specific embodiments.

[0034] refer to Figure 1 As shown, a waste gas incinerator of this embodiment includes a furnace body 1, which is a jacket structure as a whole, including an inner furnace body 11 located at the inner layer and an outer furnace body 12 located at the outer layer. A waste gas channel 13 is formed between the inner and outer furnace bodies, and a combustion chamber 14 is formed in the inner furnace body 11. The waste gas to be incinerated enters the waste gas channel 13, is heated by the heat of the furnace, and then enters the combustion chamber 14 for incineration.

[0035] Specifically, one end of the furnace body 1 is a heat source end, which is provided with a burner 16 and a combustion-supporting gas inlet 17, which are respectively used to pass the fuel and the combustion-supporting gas into the combustion chamber 14, and burn in the combustion chamber 14 to establish a high-temperature temperature field, providing a basis for the incineration of the exhaust gas. The other end of the furnace body 1 is provided with a flue gas outlet 18 to discharge the high-temperature flue gas generated in the combustion chamber 14 out of the combustion chamber 14.

[0036] The exhaust gas channel 13 is connected to the exhaust gas source through the exhaust gas inlet 131, and is connected to the combustion chamber 14 through the exhaust gas outlet 132. The exhaust gas inlet 131 and the flue gas outlet 18 are located at the same end of the furnace body 1. The flow direction of the exhaust gas in the exhaust gas channel 13 is opposite to the flow direction of the high-temperature flue gas in the combustion chamber 14, thereby improving the heat exchange effect.

[0037] As a preferred implementation of the waste gas incinerator of this embodiment, a plurality of partitions 15 are provided along the axial direction of the inner furnace body 11, and the plurality of partitions are staggered in sequence at the upper and lower parts of the inner furnace body. By optimizing the structure of the combustion chamber 14, the waste gas can flow in the combustion chamber 14 in a baffled manner, which can extend the residence time of the waste gas in the combustion chamber 14 and make the waste gas burn more fully.

[0038] Specifically in this embodiment, the partition 15 is a fire barrier, and three fire barriers are provided.

[0039] In the waste gas incinerator of this embodiment, the waste gas can enter the waste gas channel 13 for heat exchange and temperature rise before entering the combustion chamber 14 for combustion, which can effectively improve the utilization rate of the furnace heat. At the same time, the partition 15 can be set to extend the residence time of the waste gas in the combustion chamber 14, so that the waste gas can be burned more fully.

[0040] like Figure 2 As shown, in this embodiment, a waste gas incineration system is also provided, which includes the above-mentioned waste gas incinerator. The burner 16 of the waste gas incinerator is connected to the fuel source through the fuel pipeline 3, the auxiliary gas inlet 17 is connected to the auxiliary gas through the auxiliary gas pipeline 4, the waste gas inlet 131 is connected to the waste gas source through the waste gas pipeline 5, and the smoke outlet 18 is connected to the smoke pipeline 6. Of course, an automatic ignition system 2 is provided at the heat source end for igniting the fuel gas to form a high temperature field for waste gas incineration.

[0041] The exhaust gas pipeline 5 is provided with a first heat exchanger 51, and the heat source channel of the first heat exchanger 51 is connected to the flue gas pipeline 6. The exhaust gas source enters the exhaust gas channel 13 after heat exchange through the first heat exchanger 51. The auxiliary gas pipeline 4 is provided with a second heat exchanger 41, and the heat source channel of the second heat exchanger 41 is connected to the flue gas pipeline 6, and is used to heat the auxiliary gas before entering the combustion chamber 14.

[0042] Preferably, the first heat exchanger 51 and the second heat exchanger 41 are arranged in series on the flue gas duct 6, and the first heat exchanger 51 is located in front of the second heat exchanger 41. It should be noted that, based on the gas flow direction in the flue gas duct 6, the front end of the flow direction is the front, that is, Figure 2 On the left side of the paper.

[0043] In addition, a ball valve 31 and a flow meter 32 are provided on the fuel pipeline 3; wherein the flow meter 32 is used to monitor the flow of fuel in the fuel pipeline 3, and the ball valve 31 is used to control the opening and closing of the fuel pipeline 3. A thermometer 7 and a pressure gauge 8 are provided on the furnace body 1 for real-time monitoring of the temperature and pressure in the combustion chamber 14. By introducing the thermometer 7, the pressure gauge 8 and the flow meter 32 into the DCS system, the environment of the entire system can be monitored. When the temperature in the combustion chamber 14 meets the requirements for full combustion of the exhaust gas, the input of natural gas can be appropriately reduced to reduce production costs.

[0044] Specifically in this embodiment, the fuel source is natural gas, and the combustion-supporting gas is air. A fan 9 is provided on the combustion-supporting gas pipeline 4, the exhaust gas pipeline 5, and the flue gas pipeline 6. The fans 9 on the combustion-supporting gas pipeline 4 and the exhaust gas pipeline 5 are used to pressurize and transport the corresponding gases, and the fan 9 on the flue gas pipeline 6 is used to output the flue gas in the pipeline.

[0045] The working principle and process of a waste gas incineration system of this embodiment are as follows: through the automatic ignition system 2, natural gas and combustion-supporting air are ignited in the combustion chamber 14 to establish a high-temperature temperature field. After the waste gas is pressurized by the fan 9 on the waste gas pipe 5, it first passes through the first heat exchanger 51, and the waste gas is preheated to about 400°C by using the high-temperature flue gas waste heat of the waste gas after combustion; then it enters the waste gas channel 13 for further preheating and then enters the combustion chamber 14 to participate in the combustion. At the same time, the combustion-supporting air participating in the combustion is pressurized by the fan 9 on the flue gas pipe 6, first preheated by the second heat exchanger 41, and then enters the combustion chamber 14 to participate in the combustion. The high-temperature flue gas generated in the combustion chamber 14 passes through the first heat exchanger 51 and the second heat exchanger 41 in turn to provide a heat source for it, and is finally discharged from the fan 9 to the next process for treatment.

[0046] The waste gas incineration system of this embodiment can make full use of the heat energy of the high-temperature flue gas after combustion through the arrangement of the first heat exchanger 51 and the second heat exchanger 41; at the same time, through the arrangement of the waste gas channel 13, the heat energy of the furnace can be fully utilized, thereby improving the energy utilization rate of the entire system. In addition, the waste gas passes through the first heat exchanger 51 and the waste gas channel 13 for secondary heat exchange and temperature increase, which reduces the heat absorption and temperature increase time of the waste gas after entering the combustion chamber 14, and makes the temperature of the waste gas sufficiently close to the ignition point, which is conducive to promoting the combustibility of the waste gas; especially for some low calorific value waste gases, it can greatly improve the sufficiency of their combustion.

[0047] In addition, it should be noted that the automatic ignition system, heat exchanger, etc. in this embodiment are all purchased directly from the market, and their structures and working principles are also existing technologies.

[0048] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A waste gas incinerator, comprising a furnace body (1), characterized in that: The furnace body (1) is a jacket structure as a whole, comprising an inner furnace body (11) and an outer furnace body (12); a combustion chamber (14) is formed in the inner furnace body (11), and an exhaust gas channel (13) is formed between the inner and outer furnace bodies; A plurality of partitions (15) are arranged in the combustion chamber (14), and the plurality of partitions (15) are sequentially and alternately located at the upper and lower parts of the inner furnace body (11); The exhaust gas channel (13) is connected to the combustion chamber (14) through the exhaust gas outlet (132), and the flow direction of the exhaust gas in the exhaust gas channel (13) is opposite to the flow direction of the high-temperature flue gas in the combustion chamber (14).

2. A waste gas incinerator according to claim 1, characterized in that: One end of the furnace body (1) is a heat source end, which is provided with a burner (16) and a combustion-supporting gas inlet (17); the other end is provided with a smoke outlet (18), and the waste gas inlet (131) and the smoke outlet (18) are located at the same end of the furnace body (1).

3. A waste gas incinerator according to claim 2, characterized in that: There are three partitions (15), wherein the exhaust gas outlet (132) is arranged on the peripheral wall of the heat source end of the combustion chamber.

4. A waste gas incineration system, characterized in that: It comprises a waste gas incinerator as described in claim 2 or 3, wherein the heat source end is provided with an automatic ignition system (2), the burner (16) is connected to the fuel source through a fuel pipeline (3), the auxiliary combustion gas inlet (17) is connected to the auxiliary combustion gas through an auxiliary combustion gas pipeline (4), the waste gas inlet (131) is connected to the waste gas source through a waste gas pipeline (5), and the smoke outlet (18) is connected to the smoke pipeline (6).

5. A waste gas incineration system according to claim 4, characterized in that: The exhaust gas pipeline (5) is provided with a first heat exchanger (51), and the heat source channel of the first heat exchanger (51) is connected to the flue gas pipeline (6) and is used to heat the exhaust gas before it enters the exhaust gas channel (13).

6. A waste gas incineration system according to claim 5, characterized in that: The combustion-supporting gas pipeline (4) is provided with a second heat exchanger (41), and the heat source channel of the second heat exchanger (41) is connected to the flue gas pipeline (6) and is used to heat the combustion-supporting gas before it enters the combustion chamber (14).

7. A waste gas incineration system according to claim 6, characterized in that: The first heat exchanger (51) and the second heat exchanger (41) are arranged in series on the flue gas duct (6), and the first heat exchanger (51) is located in front of the second heat exchanger (41).

8. A waste gas incineration system according to any one of claims 4 to 7, characterized in that: The fuel pipeline (3) is provided with a ball valve (31) and a flow meter (32); wherein the flow meter (32) is used to monitor the flow of fuel in the fuel pipeline (3), and the ball valve (31) is used to control the opening and closing of the fuel pipeline (3).

9. A waste gas incineration system according to claim 8, characterized in that: The furnace body (1) is provided with a thermometer (7) and a pressure gauge (8) for real-time monitoring of the temperature and pressure in the combustion chamber (14).

10. The waste gas incineration system according to claim 8, characterized in that: The fuel source is natural gas, and the combustion-supporting gas is air; fans (9) are provided on the combustion-supporting gas pipeline (4), the exhaust gas pipeline (5) and the smoke gas pipeline (6).

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