Closed combustion device for treating dust-containing waste furnace gas in calcium carbide industry

Abstract

The utility model discloses a closed combustion device for treating dust-containing waste furnace gas in the calcium carbide industry. The closed combustion device comprises a main cylinder body, supporting columns are arranged at the bottom of the main cylinder, a windproof wall is arranged on the outer side of the lower end of the main cylinder, an air circulation channel is reserved between the windproof wall and the main cylinder, a combustor is arranged in the main cylinder, and a waste furnace gas pipeline is arranged at the lower end of the combustor. The device further comprises a PLC control box, the PLC control box is arranged on the outer side face of the windproof wall, the input end of the PLC control box is electrically connected with the output end of a production control terminal, the device further comprises a fuel gas pipeline, an incandescent light is arranged at the upper end of the fuel gas pipeline, and the incandescent light is electrically connected with the output end of the production control terminal. The closed combustion device for dust-containing waste furnace gas treatment in the calcium carbide industry can overcome the defects of an existing process technology, and a mode which is reasonable in design, complete in function, safe, stable and efficient in dust-containing waste furnace gas treatment is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-containing waste gas treatment in the calcium carbide industry, in particular to a closed combustion device for treating dust-containing waste gas in the calcium carbide industry. Background Art

[0002] The production capacity of the calcium carbide industry exceeds 40 million tons, and the number of devices exceeds 500. The production of calcium carbide furnaces adopts closed production devices. The waste gas is a safe release gas in the calcium carbide production process. The emission is irregular, and the release pressure is set at 100-300Pa, the emission temperature is 500-1000℃, the dust content is about 150g / cubic meter (particles less than 1mm), and the emission volume is about 3000-8000Nm³ / h. At this stage, each calcium carbide furnace is equipped with a waste gas emission port to discharge directly into the atmosphere, which poses certain safety hazards and pollutes the atmospheric environment.

[0003] In recent years, environmental and safety controls have continued to be tightened, and companies are not allowed to directly discharge raw furnace gas. Companies are forced to increase the release pressure to reduce emissions, or not emit, or direct the raw furnace gas to the furnace gas purification device for overload purification and disposal. This causes emissions from the furnace cover and electrode areas near the device when the calcium carbide furnace is over-pressured, increasing the risk of equipment burning. In addition, the raw furnace gas carries combustible components into the purification device, which also increases the risk of burning of the furnace gas purification device.

[0004] Therefore, if the waste furnace gas can be discharged in a closed and controllable manner, it will solve the technical problems that have plagued the calcium carbide industry for many years and has considerable application prospects. To this end, we propose a closed combustion device for the treatment of dusty waste furnace gas in the calcium carbide industry. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a closed combustion device for treating dusty waste gas in the calcium carbide industry, which can overcome the shortcomings of the existing process technology and provide a method for treating dusty waste gas with a reasonable design, complete functions, safety, stability and high efficiency, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a closed combustion device for treating dusty waste gas in the calcium carbide industry, comprising a main cylinder;

[0007] A main cylinder body is provided with a supporting column at the bottom, a windbreak wall is provided on the outer side of the lower end of the main cylinder body, an air circulation channel is reserved between the windbreak wall and the main cylinder body, a burner is provided inside the main cylinder body, a raw gas pipeline is provided at the lower end of the burner, and the raw gas pipeline passes through the avoidance opening of the windbreak wall and enters the interior of the main cylinder body from the opening at the lower end of the main cylinder body, which can overcome the shortcomings of the existing process technology and provide a method of treating dust-containing raw gas with reasonable design, complete functions, safety, stability and high efficiency.

[0008] Furthermore, it also includes a PLC control box, which is arranged on the outer side of the windbreak wall. The input end of the PLC control box is electrically connected to the output end of the production control terminal for adjusting and monitoring the stable operation of the process system.

[0009] Furthermore, it also includes a fuel gas pipeline, and a permanent lamp is arranged at the upper end of the fuel gas pipeline. The fuel gas pipeline passes through the avoidance hole 2 of the windbreak wall and enters the interior of the main cylinder from the opening at the lower end of the main cylinder. The input end of the permanent lamp is electrically connected to the output end of the PLC control box to ignite the dust-containing waste gas at the burner outlet and maintain stable combustion.

[0010] Furthermore, it also includes a co-burning gas pipeline, which passes through three adjacent avoidance openings of the windbreak wall and enters the interior of the main cylinder from the opening at the lower end of the main cylinder. A co-burning device is provided at the upper end of the co-burning gas pipeline to ensure the complete combustion of combustible components in the dusty waste gas.

[0011] Furthermore, a purge system is provided inside the main cylinder, and the purge system passes through the avoidance port 4 of the windbreak wall and enters the interior of the main cylinder from the opening at the lower end of the main cylinder to provide nitrogen for purge.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the closed combustion device for treating dusty waste gas in the calcium carbide industry has the following advantages:

[0013] The production control terminal sends the waste gas emission signal to the PLC control box, which opens the pipeline control valve of the fuel gas pipeline, starts the ignition command to ignite the ever-burning lamp, and the ever-burning lamp ignites the burner and maintains stable combustion. When the gas component analyzer detects that the combustible components in the dusty waste gas are reduced to the set value, it sends a signal to the PLC control box, and the PLC control box opens the control valve of the accompanying gas pipeline to ignite the accompanying burner, and the waste gas is completely burned. The flame is always controlled in the closed combustion chamber, and the flue gas generated by the combustion is sent to the next section. If the control system receives a combustible gas alarm signal in the closed combustion chamber, it will open the control valve of the purge system and introduce nitrogen into the combustion chamber to dilute the combustible gas to outside the explosion range. In normal operation, the control valve of the fuel gas pipeline is always in the open state, keeping the ever-burning lamp in the normal burning state, and the dusty waste gas emitted by the combustion can be ignited at any time, thereby realizing the closed, safe and controllable emission of the waste gas. The flame during the combustion process is always controlled in the closed combustion chamber, and the combustion of the waste gas can be observed through video monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] In the figure: 1 windbreak wall, 2 purge system, 3 ever-burning lamp, 4 burner, 5 main cylinder, 6 co-burner, 7 PLC control box, 8 air circulation channel, 9 fuel gas pipeline, 10 co-burning gas pipeline, 11 waste gas pipeline. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1 , This embodiment provides a technical solution: a closed combustion device for treating dusty waste gas in the calcium carbide industry, comprising a main cylinder 5;

[0018] The main cylinder 5 has a support column at its bottom, a windbreak wall 1 is arranged on the outer side of the lower end of the main cylinder 5, an air circulation channel 8 is reserved between the windbreak wall 1 and the main cylinder 5, a burner 4 is arranged inside the main cylinder 5, a waste gas pipeline 11 is arranged at the lower end of the burner 4, the waste gas pipeline 11 passes through the avoidance of the windbreak wall 1 and enters the interior of the main cylinder 5 from the opening at the lower end of the main cylinder 5, and also includes a fuel gas pipeline 9, and a permanent lamp 3 is arranged at the upper end of the fuel gas pipeline 9. The fuel gas pipeline 9 passes through the avoidance opening 2 of the windbreak wall 1 and enters the interior of the main cylinder 5 from the opening at the lower end of the main cylinder 5. The input end of the ever-burning lamp 3 is electrically connected to the output end of the PLC control box 7. It also includes a combustion gas pipeline 10. The combustion gas pipeline 10 passes through the adjacent avoidance openings 3 of the windbreak wall 1 and enters the interior of the main cylinder 5 from the opening at the lower end of the main cylinder 5. The upper ends of the combustion gas pipelines 10 are all provided with combustion devices 6. The interior of the main cylinder 5 is provided with a purge system 2. The purge system 2 nitrogen pipeline, a control valve is arranged on the nitrogen pipeline, the purge system 2 passes through the avoidance port 4 of the windbreak wall 1 and enters the interior of the main cylinder 5 from the opening at the lower end of the main cylinder 5, the production control terminal sends the waste gas discharge signal to the PLC control box 7, the PLC control box 7 opens the pipeline control valve of the fuel gas pipeline 9, starts the ignition command to ignite the ever-burning lamp 3, the ever-burning lamp 3 ignites the burner 4, and maintains stable combustion; when the gas component analyzer detects that the combustible components in the dusty waste gas are reduced to the set value, it sends a signal to the PLC control box 7, the PLC control box 7 opens the control valve of the accompanying combustion gas pipeline 10, ignites the accompanying burner 3, and the accompanying waste gas is completely burned; the flame is always controlled in the closed combustion chamber, and the smoke generated by the combustion is sent to the next section. If the control system 7 receives the combustible gas alarm signal in the closed combustion chamber, it will open the control valve of the purge system 2 and introduce nitrogen into the combustion chamber to dilute the combustible gas to outside the explosion range.

[0019] Among them: it also includes a PLC control box 7, which is arranged on the outer side of the windbreak wall 1, and the input end of the PLC control box 7 is electrically connected to the output end of the production control terminal.

[0020] The utility model provides a closed combustion device for treating dusty waste gas in calcium carbide industry, and its working principle is as follows: a PLC control box 7 is electrically connected to a gas component analyzer at the discharge port of a production device in a two-way manner, an electrical instrument detection point is arranged on the outside of the main cylinder 5, the electrical instrument detection point detects the combustion condition of the waste gas inside the main cylinder 5 and sends it to the production control terminal, the production control terminal sends the waste gas discharge signal to the PLC control box 7, the PLC control box 7 opens the pipeline control valve of the fuel gas pipeline 9, starts the ignition command to ignite the ever-burning lamp 3, the ever-burning lamp 3 ignites the burner 4, and maintains stable combustion; when the gas component analyzer detects that the combustible component in the dusty waste gas is reduced to a set value, a signal is sent to the PLC control box 7, the PLC The control box 7 opens the control valve of the co-burning gas pipeline 10, ignites the co-burner 3, and the raw furnace gas is completely burned; the flame is always controlled in the closed combustion chamber, and the smoke generated by the combustion is sent to the next work section. If the control system 7 receives a combustible gas alarm signal in the closed combustion chamber, it will open the control valve of the purge system 2, and introduce nitrogen into the combustion chamber to dilute the combustible gas to outside the explosion range. During normal operation, the control valve of the fuel gas pipeline 9 is always in an open state, keeping the ever-burning lamp 3 in a normal burning state, and the dusty raw furnace gas emitted by the combustion can be ignited at any time, thereby realizing the closed, safe and controllable emission of the raw furnace gas. The flame during the combustion process is always controlled in the closed combustion chamber, and the combustion of the raw furnace gas can be observed through video monitoring.

[0021] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A closed combustion device for treating dusty waste gas in the calcium carbide industry, characterized by: It includes a main cylinder (5); A main cylinder (5) is provided with a support column at the bottom thereof, a windbreak wall (1) is provided on the outer side of the lower end of the main cylinder (5), an air circulation channel (8) is reserved between the windbreak wall (1) and the main cylinder (5), a burner (4) is provided inside the main cylinder (5), a waste gas pipeline (11) is provided at the lower end of the burner (4), and the waste gas pipeline (11) passes through the avoidance opening of the windbreak wall (1) and enters the interior of the main cylinder (5) from the opening at the lower end of the main cylinder (5).

2. A closed combustion device for treating dusty waste gas in the calcium carbide industry according to claim 1, characterized in that: It also comprises a PLC control box (7), wherein the PLC control box (7) is arranged on the outer side of the windbreak wall (1), and the input end of the PLC control box (7) is electrically connected to the output end of the production control terminal.

3. A closed combustion device for treating dusty waste gas in the calcium carbide industry according to claim 2, characterized in that: It also includes a fuel gas pipeline (9), the upper end of which is provided with a permanent lamp (3), the fuel gas pipeline (9) passes through the escape opening 2 of the windbreak wall (1) and enters the interior of the main cylinder (5) from the opening at the lower end of the main cylinder (5), and the input end of the permanent lamp (3) is electrically connected to the output end of the PLC control box (7).

4. A closed combustion device for treating dusty waste gas in the calcium carbide industry according to claim 1, characterized in that: It also includes a combustion gas pipeline (10), wherein the combustion gas pipeline (10) passes through three adjacent avoidance openings of the windbreak wall (1) and enters the interior of the main cylinder (5) from the opening at the lower end of the main cylinder (5), and the upper end of the combustion gas pipeline (10) is provided with a combustion device (6).

5. A closed combustion device for treating dusty waste gas in the calcium carbide industry according to claim 1, characterized in that: The main cylinder (5) is provided with a purge system (2) inside. The purge system (2) passes through the avoidance opening 4 of the windbreak wall (1) and enters the inside of the main cylinder (5) from the opening at the lower end of the main cylinder (5).

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