Flue waste gas and rising air mixing mechanism

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a flue waste gas and rising air mixing mechanism which can convey high-VOCs waste gas back to a coking furnace for incineration treatment, simplify the structure of a treatment system, save energy, save energy and protect the environment. Comprising a chimney and a waste gas pipe, an air inlet is formed in the bottom of the chimney, a smoke outlet is formed in the top of the chimney, the input end of the waste gas pipe is connected with a waste gas pipeline of the coking furnace, and the output end of the waste gas pipe extends into the bottom of the chimney; the VOCS probe is installed on the waste gas pipe, a probe body of the VOCS probe extends into the waste gas pipe, the VOCS probe detects the concentration of VOCs in the waste gas pipe, an air inlet of the fan is connected with the output end of the exhaust pipe, the input end of the exhaust pipe extends into the middle of the chimney, an air outlet of the exhaust pipe is connected with the input end of the air return pipe, and the VOCs probe is installed on the VOCS probe. The output end of the air return pipe is connected with an air inlet pipe of the coking furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a flue waste gas and rising air mixing mechanism. Background Art

[0002] Coking furnaces produce VOCs (volatile organic compounds) during production. These VOCs are discharged into the air through the flue along with the exhaust gas, causing harm to the environment. Excessive accumulation of VOCs can also cause explosion hazards, so VOCs need to be treated. The traditional treatment method is to collect VOCs and then incinerate them, but this method requires special collection and incineration equipment, resulting in a complex treatment system structure, and also wastes energy, which is not conducive to energy conservation and environmental protection. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a flue waste gas and rising air mixing mechanism which can transport high VOCs waste gas back to the coking furnace for incineration treatment, simplify the treatment system structure, save energy, and be energy-saving and environmentally friendly.

[0004] The utility model discloses a flue exhaust gas and rising air mixing mechanism, comprising a chimney and an exhaust pipe, wherein an air inlet is arranged at the bottom of the chimney, a smoke outlet is arranged at the top of the chimney, the input end of the exhaust pipe is connected with the exhaust pipe of the coking furnace, and the output end of the exhaust pipe extends into the bottom of the chimney; the utility model also comprises a VOCS probe, a fan, an exhaust pipe and a return air pipe, wherein the VOCS probe is installed on the exhaust pipe, the probe of the VOCS probe extends into the exhaust pipe, the VOCS probe detects the concentration of VOCs in the exhaust pipe, the air inlet of the fan is connected with the output end of the exhaust pipe, the input end of the exhaust pipe extends into the middle of the chimney, the air outlet of the exhaust pipe is connected with the return air pipe, and the exhaust pipe is connected with the exhaust pipe. The input end of the exhaust pipe is connected to the input end of the exhaust pipe, and the output end of the return air pipe is connected to the air inlet pipe of the coking furnace; when working, the exhaust gas generated by the coking furnace is transported to the chimney through the exhaust pipe, and the exhaust gas is mixed and diluted with the rising air in the chimney and discharged from the smoke outlet on the top of the chimney. The VOCS probe detects the concentration of VOCs in the exhaust gas in the exhaust pipe. When the concentration of VOCs is greater than the set value, the fan is turned on, and the fan extracts the mixed gas of the exhaust gas and air in the chimney through the exhaust pipe and transports it back to the coking furnace through the return air pipe for incineration, thereby treating the VOCs in the exhaust gas. No special collection and incineration equipment is required, which simplifies the treatment system structure, saves energy, and is beneficial to energy conservation and environmental protection.

[0005] Preferably, it also includes three-way one, three-way two and a blowing pipe, three-way one is installed in the middle of the exhaust pipe, one input end of the three-way one is connected to the air, three-way two is installed in the middle of the return air pipe, one output end of the three-way two is connected to the input end of the blowing pipe, and the output end of the blowing pipe extends into the bottom of the chimney; after working for a period of time, when there is a lot of dust accumulated in the chimney, the three-way one is converted to close the exhaust pipe towards the chimney and open the direction connected to the air, the three-way two is converted to close the return air pipe towards the coking furnace and connect the direction connected to the blowing pipe, and start the fan, the fan draws outside air through the three-way one and the exhaust pipe, and inputs it to the bottom of the chimney through the three-way two and the blowing pipe, so that the high-speed airflow impacts the dust accumulated in the chimney, and the dust is discharged through the smoke outlet of the chimney, thereby realizing the chimney cleaning, which is practical.

[0006] Preferably, it also includes an oxygen sensor and a nitrogen pipe, the oxygen sensor is installed in the middle of the chimney, the probe of the oxygen sensor extends into the interior of the chimney, the output end of the nitrogen pipe extends into the bottom of the chimney, and an electric control valve is installed on the nitrogen pipe; the input end of the nitrogen pipe is connected to the nitrogen supply system, the nitrogen pipe detects the oxygen content in the chimney, when the oxygen content is higher than the set value, the electric control valve of the nitrogen pipe opens, and nitrogen is input into the chimney through the nitrogen pipe, so that the oxygen content is reduced to below the safe value, thereby improving the safety of the flue area.

[0007] Preferably, it also includes a valve, which is installed at the upper part of the chimney and is located above the input end of the exhaust pipe; the valve opens or closes the upper part of the chimney. When the VOCS probe detects that the VOCs concentration in the exhaust pipe is too high, the valve closes the upper part of the chimney, and the fan is turned on to extract the exhaust gas and air mixture inside the chimney through the exhaust pipe and transport it back to the coking furnace through the return air pipe for incineration treatment, which has good practicality.

[0008] Preferably, it also includes an expansion joint, which is installed in the middle of the chimney; the displacement caused by the thermal expansion of the chimney is compensated by installing the expansion joint to protect the equipment and pipelines from damage and deformation.

[0009] Preferably, it also includes an air guide plate, which is installed in the middle of the chimney. The air guide plate is located above the output ends of the exhaust pipe, the nitrogen pipe and the blow pipe, and the air guide plate is used to mix the exhaust gas, air and nitrogen; the air guide plate guides the exhaust gas and air rising in the chimney to increase the mixing speed of the exhaust gas, air and nitrogen.

[0010] Compared with the prior art, the utility model has the following beneficial effects: during operation, the waste gas generated by the coking furnace is transported to the chimney through the waste gas pipe, the waste gas is mixed and diluted with the rising air in the chimney and then discharged from the smoke outlet on the top of the chimney, the VOCS probe detects the concentration of VOCs in the waste gas in the waste gas pipe, when the concentration of VOCs is greater than the set value, the fan is turned on, the fan extracts the mixture of waste gas and air in the chimney through the exhaust pipe and transports it back to the coking furnace through the return air pipe for incineration, thereby treating the VOCs in the waste gas, without the need for special collection and incineration equipment, simplifying the treatment system structure, saving energy, and being beneficial to energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a front sectional structural schematic diagram of the utility model;

[0013] Figure 3 It is a schematic diagram of the axonometric structure of the utility model;

[0014] Figure 4 It is a structural diagram of the fan, exhaust duct, return duct, three-way one, three-way two, and blowing duct;

[0015] Markings in the attached figure: 1. Chimney; 2. Exhaust pipe; 3. VOCS probe; 4. Fan; 5. Exhaust duct; 6. Return air duct; 7. Three-way one; 8. Three-way two; 9. Blowing pipe; 10. Oxygen sensor; 11. Nitrogen pipe; 12. Valve; 13. Expansion joint; 14. Wind guide plate. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0017] Example 1

[0018] like Figures 1 to 4As shown, a flue exhaust gas and rising air mixing mechanism comprises a chimney 1 and an exhaust pipe 2, wherein an air inlet is arranged at the bottom of the chimney 1, a smoke outlet is arranged at the top of the chimney 1, the input end of the exhaust pipe 2 is connected to the exhaust pipe of the coking furnace, and the output end of the exhaust pipe 2 extends into the bottom of the chimney 1; it also comprises a VOCS probe 3, a fan 4, an exhaust pipe 5 and a return air pipe 6, the VOCS probe 3 is installed on the exhaust pipe 2, the probe of the VOCS probe 3 extends into the exhaust pipe 2, the VOCS probe 3 detects the concentration of VOCs in the exhaust pipe 2, the air inlet of the fan 4 is connected to the output end of the exhaust pipe 5, the input end of the exhaust pipe 5 extends into the middle of the chimney 1, the air outlet of the exhaust pipe 5 is connected to the input of the return air pipe 6, and the output of the return air pipe 6 The exhaust pipe 5 is connected to the air inlet pipe of the coking furnace; it also includes a three-way 1 7, a three-way 2 8 and a blowing pipe 9, a three-way 1 7 is installed in the middle of the exhaust pipe 5, an input end of the three-way 1 7 is connected to the air, a three-way 2 8 is installed in the middle of the return air pipe 6, an output end of the three-way 2 8 is connected to the input end of the blowing pipe 9, and the output end of the blowing pipe 9 extends into the bottom of the chimney 1; it also includes an oxygen sensor 10 and a nitrogen pipe 11, the oxygen sensor 10 is installed in the middle of the chimney 1, the probe of the oxygen sensor 10 extends into the interior of the chimney 1, the output end of the nitrogen pipe 11 extends into the bottom of the chimney 1, and an electric control valve is installed on the nitrogen pipe 11; it also includes a valve 12, the valve 12 is installed in the upper part of the chimney 1, and the valve 12 is located above the input end of the exhaust pipe 5;

[0019] During operation, the waste gas generated by the coking furnace is transported to the chimney 1 through the waste gas pipe 2. The waste gas is mixed and diluted with the rising air in the chimney 1 and then discharged from the smoke outlet at the top of the chimney 1. The VOCS probe 3 detects the concentration of VOCs in the waste gas in the waste gas pipe 2. When the concentration of VOCs is greater than the set value, the valve 12 closes the upper part of the chimney 1, and the fan 4 is turned on. The fan 4 extracts the mixed gas of the waste gas and air in the chimney 1 through the exhaust pipe 5 and transports it back to the coking furnace through the return air pipe 6 for incineration, thereby treating the VOCs in the waste gas. No special collection and incineration equipment is required, the treatment system structure is simplified, energy is saved, and it is beneficial to energy conservation and environmental protection. After working for a period of time, when there is a lot of ash accumulated in the chimney 1, the three-way one-7 conversion will turn the exhaust pipe 5 to the direction of the chimney 1. To close, open the direction connected to the air, convert the three-way 2 8 to close the return air duct 6 towards the coking furnace, connect the direction connected to the blowing pipe 9, start the fan 4, the fan 4 draws outside air through the three-way 1 7 and the exhaust pipe 5, and inputs it to the bottom of the chimney 1 through the three-way 2 8 and the blowing pipe 9, so that the high-speed airflow impacts the accumulated ash in the chimney 1, and the accumulated ash is discharged through the smoke outlet of the chimney 1, so as to realize the cleaning of the chimney 1, which has good practicality. The input end of the nitrogen pipe 11 is connected to the nitrogen supply system, and the nitrogen pipe 11 detects the oxygen content in the chimney 1. When the oxygen content is higher than the set value, the electric control valve of the nitrogen pipe 11 is opened, and nitrogen is input into the chimney 1 through the nitrogen pipe 11, so that the oxygen content is reduced to below the safe value, thereby improving the safety of the flue area.

[0020] Example 2

[0021] like Figures 1 to 3 As shown, a flue exhaust gas and rising air mixing mechanism comprises a chimney 1 and an exhaust pipe 2, wherein an air inlet is arranged at the bottom of the chimney 1, a smoke outlet is arranged at the top of the chimney 1, an input end of the exhaust pipe 2 is connected to an exhaust pipe of a coking furnace, and an output end of the exhaust pipe 2 extends into the bottom of the chimney 1; and further comprises a VOCS probe 3, a fan 4, an exhaust pipe 5 and a return air pipe 6, wherein the VOCS probe 3 is installed on the exhaust pipe 2, and a probe of the VOCS probe 3 extends into the exhaust pipe 2, and the VOCS probe 3 detects VOCs in the exhaust pipe 2. concentration, the air inlet of the fan 4 is connected to the output end of the exhaust pipe 5, the input end of the exhaust pipe 5 extends into the middle of the chimney 1, the air outlet of the exhaust pipe 5 is connected to the input of the return air pipe 6, and the output end of the return air pipe 6 is connected to the air inlet pipe of the coking furnace; it also includes an expansion joint 13, the expansion joint 13 is installed in the middle of the chimney 1; it also includes an air guide plate 14, the air guide plate 14 is installed in the middle of the chimney 1, the air guide plate 14 is located above the output ends of the exhaust pipe 2, the nitrogen pipe 11 and the blowing pipe 9, and the air guide plate 14 is used to mix the exhaust gas, air and nitrogen.

[0022] The expansion joint 13 is installed to compensate for the displacement caused by the thermal expansion of the chimney 1 to protect the equipment and pipelines from damage and deformation. The wind guide plate 14 guides the rising exhaust gas and air in the chimney 1 to increase the mixing speed of the exhaust gas, air and nitrogen.

[0023] like Figures 1 to 4 As shown, the utility model is a flue waste gas and rising air mixing mechanism. When it is working, the waste gas generated by the coking furnace is first transported to the chimney 1 through the waste gas pipe 2, and the waste gas is mixed and diluted with the rising air in the chimney 1 and then discharged from the smoke outlet on the top of the chimney 1. Then the VOCS probe 3 detects the concentration of VOCs in the waste gas in the waste gas pipe 2. When the concentration of VOCs is greater than the set value, the valve 12 closes the chimney 1, and the fan 4 is turned on. The fan 4 extracts the mixed gas of the waste gas and air in the chimney 1 through the exhaust pipe 5 and transports it back to the coking furnace through the return air pipe 6 for incineration. Then, when the oxygen sensor 10 detects that the oxygen content in the chimney 1 is high, the nitrogen pipe 11 inputs nitrogen into the chimney 1. Finally, after working for a period of time, the three-way one 7 and the three-way two 8 are switched, and the fan 4 blows the outside air into the chimney 1 through the blowing pipe 9 to blow away the accumulated ash.

[0024] The main functions achieved by this utility model are:

[0025] 1. It can transport high VOCs waste gas back to the coking furnace for incineration treatment, simplify the treatment system structure, save energy, and be environmentally friendly;

[0026] 2. It has flue ash cleaning function;

[0027] 3. It has nitrogen protection function to improve the safety in the flue area.

[0028] The installation method, connection method or setting method of a flue exhaust gas and rising air mixing mechanism of the utility model are all common mechanical methods, and can be implemented as long as the beneficial effects can be achieved; the chimney 1, exhaust pipe 2, VOCS probe 3, fan 4, three-way 1 7, three-way 2 8, valve 12, expansion joint 13, and electric control valve of the flue exhaust gas and rising air mixing mechanism of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0029] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A flue gas and rising air mixing mechanism, comprising a chimney (1) and an exhaust pipe (2), wherein the bottom of the chimney (1) is provided with an air inlet, the top of the chimney (1) is provided with a smoke outlet, the input end of the exhaust pipe (2) is connected to the exhaust pipe of a coking furnace, and the output end of the exhaust pipe (2) extends into the bottom of the chimney (1); characterized in that: The invention also comprises a VOCS probe (3), a fan (4), an exhaust pipe (5) and a return air pipe (6). The VOCS probe (3) is installed on the exhaust pipe (2). The probe of the VOCS probe (3) extends into the exhaust pipe (2). The VOCS probe (3) detects the concentration of VOCs in the exhaust pipe (2). The air inlet of the fan (4) is connected to the output end of the exhaust pipe (5). The input end of the exhaust pipe (5) extends into the middle of the chimney (1). The air outlet of the exhaust pipe (5) is connected to the input end of the return air pipe (6). The output end of the return air pipe (6) is connected to the air inlet pipe of the coking furnace.

2. A flue gas and rising air mixing mechanism as claimed in claim 1, characterized in that: It also comprises a three-way first (7), a three-way second (8) and a blowing pipe (9). The three-way first (7) is installed in the middle of the exhaust pipe (5), and one input end of the three-way first (7) is connected to the air. The three-way second (8) is installed in the middle of the return air pipe (6), and one output end of the three-way second (8) is connected to the input end of the blowing pipe (9). The output end of the blowing pipe (9) extends into the bottom of the chimney (1).

3. A flue gas and rising air mixing mechanism as claimed in claim 1, characterized in that: It also comprises an oxygen sensor (10) and a nitrogen pipe (11), wherein the oxygen sensor (10) is installed in the middle of the chimney (1), a probe of the oxygen sensor (10) extends into the interior of the chimney (1), an output end of the nitrogen pipe (11) extends into the bottom of the chimney (1), and an electric control valve is installed on the nitrogen pipe (11).

4. A flue gas and rising air mixing mechanism as claimed in claim 1, characterized in that: The invention also comprises a valve (12), which is installed on the upper part of the chimney (1), and the valve (12) is located above the input end of the exhaust pipe (5).

5. A flue gas and rising air mixing mechanism as claimed in claim 1, characterized in that: It also comprises an expansion joint (13), which is installed in the middle of the chimney (1).

6. A flue gas and rising air mixing mechanism as claimed in claim 1, characterized in that: The invention also comprises an air guide plate (14), which is installed in the middle of the chimney (1). The air guide plate (14) is located above the output ends of the exhaust pipe (2), the nitrogen pipe (11) and the blowing pipe (9). The air guide plate (14) is used to mix the exhaust gas, air and nitrogen.

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