Spraying device for flue of roasting ring type furnace

Abstract

The utility model relates to the technical field of metallurgical roasting flue gas pretreatment equipment, in particular to a flue spraying device of a roasting ring type furnace. Comprising a flue pipe and an underground flue, the underground flue is communicated with the flue pipe, the flue pipe is provided with a micro fog nozzle, the micro fog nozzle is respectively communicated with a water distribution cylinder and a gas distribution cylinder through a gas path adapter and a water path adapter, the water distribution cylinder is connected with a water supply source through a tap water header pipe, and the gas distribution cylinder is connected with a gas supply source through a compressed air header pipe. The device is easy to operate, convenient to install and easy to maintain, the dust concentration of roasting ring type flue gas can be reduced, it is ensured that the discharged flue gas reaches the standard, and meanwhile the risk that the flue is on fire to cause fire disasters due to the fact that the temperature of the roasting ring type flue gas is too high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical roasting flue gas pretreatment equipment, in particular to a roasting ring furnace flue spray device. Background Art

[0002] The country has vigorously promoted the adjustment, transformation and high-quality development, which has become the focus of low-carbon development in high-energy-consuming industries. Promoting the effective development of low-carbon emission reduction in enterprises will be the direction of enterprise development. In March 2019, the China Carbon Industry Association issued the "T / ZGTS001-2019 Carbon Industry Air Pollution Emission Standard", which was officially implemented on September 1, 2019. The release of this standard means that the industry's environmental protection requirements are becoming stricter.

[0003] At present, due to the special production process, the roasting process in the carbon industry often produces mixed gases such as carbon monoxide, sulfur dioxide, NO compounds, water vapor, dust, and tar when the filling and insulation materials in the roasting ring furnace are roasted under high temperature conditions. Due to the high temperature of the roasting ring furnace and the complex components in the flue gas, there may be a risk of high-temperature ignition during the collection of the flue gas through the flue. At the same time, the high dust concentration in the flue gas puts a heavy burden on the subsequent environmental protection equipment, resulting in the environmental protection equipment failing to meet the predetermined environmental protection index requirements after processing the flue gas. It is necessary to prevent cooling and dust settling in the roasting ring furnace flue, but the existing technology does not have special equipment for preventing cooling and dust settling. Utility Model Content

[0004] In response to the above technical problems, the utility model provides a roasting ring furnace flue spray device, which can reduce the dust concentration of the roasting ring flue gas and ensure that the discharged flue gas meets the standards. At the same time, the device solves the risk of the roasting ring furnace flue temperature being too high, causing the flue to catch fire and cause a fire.

[0005] A flue spray device for a roasting ring furnace comprises a flue pipe and an underground flue. The underground flue is connected to the flue pipe, and a micro-mist nozzle is arranged on the flue pipe. The micro-mist nozzle is respectively connected to a water distribution cylinder and a gas distribution cylinder through an air path switching tube and a water path switching tube. The water distribution cylinder is connected to a water supply source through a tap water main pipe, and the gas distribution cylinder is connected to an gas supply source through a compressed air main pipe.

[0006] The gas circuit transfer pipe is provided with a gas circuit pressure regulating valve; the water circuit transfer pipe is provided with a water circuit pressure regulating valve.

[0007] The air circuit transfer pipe is also provided with a pneumatic triplet, and the air circuit transfer pipe of the air cylinder is connected with the micro-mist nozzle through the air circuit pressure regulating valve and the pneumatic triplet in sequence.

[0008] The water distribution cylinder is provided with a plurality of water transfer tubes, and the gas distribution cylinder is provided with a plurality of gas transfer tubes. One group of water transfer tubes corresponds to one group of gas transfer tubes to form a water-gas pipe group, and the water-gas pipe group is connected with the flue pipe through the micro-mist nozzles.

[0009] The tap water main pipe is provided with a water circuit main valve, and the compressed air main pipe is provided with an air circuit main valve.

[0010] A plurality of micro-mist nozzles are evenly distributed on the flue pipe.

[0011] The flue pipe is provided with a plurality of micro-mist nozzles at different heights.

[0012] The collision head spray volume is 0.07L-0.09L / min.

[0013] The beneficial effects of the utility model are as follows: the utility model sprays fine water mist into the steel flue through a micro-mist nozzle arranged on the underground outlet steel flue of the roasting ring furnace, thereby achieving the goal of reducing the dust emission concentration in the flue due to the free sedimentation of flue gas dust due to moisture, and at the same time reducing the flue gas temperature in the flue to reduce the risk of flue fire. The compressed air supply is ensured on each branch, and the compressed air is output by the pressure regulating valve on each branch after entering the air distribution cylinder. Since the compressed air contains a large amount of water vapor and dust, in order to ensure that the micro-mist nozzle is not blocked, the compressed air is filtered through the pneumatic triplet before entering the micro-mist nozzle. After the water and compressed air reach the micro-mist nozzle at the same time, the water is evenly vaporized into particles with a diameter of 92um through compressed air atomization and enters the flue, and the particles in the flue gas are diluted and settled in the underground flue.

[0014] In addition, the existing roasting ring furnace is generally equipped with multiple flues. The ring roasting furnace is a heat treatment equipment for carbon materials such as anode blocks, in which the flue is a key structure in the roasting furnace. They not only play a role in guiding the flow of hot air, but also help to achieve uniform distribution of temperature in the furnace and emission of combustion products. The number of flues of the ring roasting furnace varies according to the furnace design, and multiple flues are usually provided. The specific number of flues depends on the design of the furnace and the requirements for thermal efficiency, output and process control during the production process. The utility model can adjust the water and gas pressures separately for different flues to meet the cooling and sedimentation needs of different flues. The utility model does not require multiple groups of water supply sources and gas supply sources. It can realize grouped water supply and gas supply only through water distribution cylinders and gas distribution cylinders, which greatly saves pipelines and reduces the difficulty of layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the layout of micro-mist nozzles at different heights of the utility model.

[0017] In the figure: micro-mist nozzle 1, air circuit transfer tube 2, water circuit transfer tube 3, water circuit pressure regulating valve 4, water distribution cylinder 5, pneumatic triplet 6, air circuit pressure regulating valve 7, air distribution cylinder 8, water circuit main valve 9, air circuit main valve 10, tap water main pipe 11, compressed air main pipe 12, flue pipe 13, underground flue 14. DETAILED DESCRIPTION

[0018] A flue spray device for a baking ring furnace comprises a flue pipe 13 and an underground flue 14, wherein the underground flue 14 is connected to the flue pipe 13, and a micro-mist nozzle 1 is arranged on the flue pipe 13, and the micro-mist nozzle 1 is respectively connected to a water distribution cylinder 5 and a gas distribution cylinder 8 through an air circuit transfer tube 2 and a water circuit transfer tube 3, wherein the water distribution cylinder 5 is connected to a water supply source through a tap water main pipe 11, and the gas distribution cylinder 8 is connected to an air supply source through a compressed air main pipe 12. The air circuit transfer tube 2 and the water circuit transfer tube 3 are made of PVC.

[0019] The gas circuit transfer pipe 2 is provided with a gas circuit pressure regulating valve 7; the water circuit transfer pipe 3 is provided with a water circuit pressure regulating valve 4. The gas circuit pressure regulating valve 7 and the water circuit pressure regulating valve 4 are used to adjust the pressure of different flues, and the water and gas volumes are also effectively controlled. The micro-mist spraying state is achieved by adjusting the air supply, reducing the condensation of water mist into water droplets, and achieving water mist spraying.

[0020] The air circuit transfer pipe 2 is also provided with a pneumatic triplet 6, and the air circuit transfer pipe 2 of the air cylinder 8 is connected to the micro-mist nozzle 1 through the air circuit pressure regulating valve 7 and the pneumatic triplet 6 in turn. The main functions of the pneumatic triplet 6 are as follows: 1. The pneumatic triplet can connect the pneumatic components and the pipeline to each other, so as to realize the air pressure transmission and control. The pneumatic triplet can exert its stable and reliable transmission characteristics. 2. Ensure the stability and reliability of air pressure transmission. Due to the sealing and firmness of the pneumatic triplet itself, it can effectively reduce the risk of air pressure leakage in the system and ensure the stability and reliability of pressure and gas flow. 3. The pneumatic triplet can be easily connected and distributed through the pneumatic triplet, thereby improving the automation degree and work efficiency of the system. 4. The pneumatic triplet can be disassembled and replaced, which makes the maintenance and upgrading of the system more convenient and quick, and reduces the system maintenance cost and difficulty.

[0021] The water distribution cylinder 5 is provided with a plurality of water transfer tubes 3, and the gas distribution cylinder 8 is provided with a plurality of gas transfer tubes 2. One group of water transfer tubes 3 corresponds to one group of gas transfer tubes 2 to form a water-gas pipe group, and the water-gas pipe group is connected to the flue pipe 13 through the micro-mist nozzle 1. Multi-point atomization spraying is realized, water mist coverage in the flue is realized, and precise cooling and precipitation of particulate matter are realized.

[0022] The water main pipe 11 is provided with a water circuit main valve 9, and the compressed air main pipe 12 is provided with a gas circuit main valve 10. The separate provision of gas circuit and water circuit main valves facilitates cutting off the water supply source and the gas supply source, and facilitates subsequent maintenance.

[0023] The flue pipe 13 is evenly distributed with a plurality of micro mist nozzles 1. The flue pipe 13 is provided with a plurality of micro mist nozzles 1 at different heights. The water supply and gas supply pressures at different heights can be adjusted. Figure 2 For example, 4 groups of micro mist nozzles 1 introduce water vapor of different pressures along different heights, such as reducing the water supply pressure and increasing the air supply pressure from the highest point to the lowest point. The upper micro mist nozzle 1 sprays water mist with higher humidity and is easy to settle particles in a gradient manner. The lower micro mist nozzle 1 sprays water mist with a larger volume and atmospheric pressure, which is convenient for blowing away the water mist falling from the upper layer. At the same time, the higher atmospheric pressure is convenient for blowing the mixed gas such as carbon monoxide, sulfur dioxide, and NO compounds back into the furnace to continue the reaction. At the same time, the water supply of the waterway can be stopped after the furnace is shut down, and the water-free high pressure is introduced to achieve dust and tar purge in the flue. The above structure is not disclosed in the prior art. The spray volume of the micro mist nozzle 1 is 0.07L-0.09L / min. The compressed air atomization makes the water uniformly vaporize into particles with a diameter of 92um and enter the flue. The above water mist does not affect the underground flue 14. The water mist dissipates under the action of high temperature, only ensuring that the flue pipe 13 is effectively reduced and the particles are settled, without affecting the temperature and work in the furnace, and effectively protecting the safety of ground workers.

[0024] When the utility model is in operation, the compressed air passes through the air distribution cylinder and is output by the pressure regulating valve into the three-stage filter to filter the compressed air and then enter the micro-mist nozzle. The tap water passes through the water distribution cylinder and enters the pressure regulating valve and then enters the micro-mist nozzle. The compressed air and water are adjusted by the pressure regulating valve and the pressure regulating valve respectively, so that the water vapor at the outlet of the micro-mist nozzle forms a mist, achieving the best effect. 92um particles enter the flue, cool the high-temperature flue gas, and at the same time, the particulate matter in the flue gas is settled and enters the next level of discharge. The utility model is suitable for the preliminary treatment of high-temperature flue gas generated by the ring roasting furnace in the carbon industry and the cooling of the flue gas to prevent the risk of fire. The micro-mist nozzle 1 can also use a spiral tubular nozzle to enhance the water mist swirl effect.

Claims

1. A flue spray device for a roasting ring furnace, comprising a flue pipe (13) and an underground flue (14), wherein the underground flue (14) is connected to the flue pipe (13), characterized in that: A micro mist nozzle (1) is provided on the flue pipe (13). The micro mist nozzle is connected to the water distribution cylinder (5) and the gas distribution cylinder (8) through the gas circuit transfer pipe (2) and the water circuit transfer pipe (3), respectively. The water distribution cylinder (5) is connected to the water supply source through the tap water main pipe (11), and the gas distribution cylinder (8) is connected to the gas supply source through the compressed air main pipe (12).

2. A roasting ring furnace flue spray device according to claim 1, characterized in that: The gas circuit transfer pipe (2) is provided with a gas circuit pressure regulating valve (7); the water circuit transfer pipe (3) is provided with a water circuit pressure regulating valve (4).

3. A roasting ring furnace flue spray device according to claim 2, characterized in that: The air circuit transfer pipe (2) is also provided with a pneumatic triplet (6), and the air circuit transfer pipe (2) of the air cylinder (8) is connected to the micro-mist nozzle (1) via the air circuit pressure regulating valve (7) and the pneumatic triplet (6) in sequence.

4. The flue duct spraying device for a baking ring furnace according to claim 1, characterized in that: The water distribution cylinder (5) is provided with a plurality of groups of water transfer tubes (3), and the gas distribution cylinder (8) is provided with a plurality of groups of gas transfer tubes (2). One group of water transfer tubes (3) corresponds to one group of gas transfer tubes (2) to form a water-gas tube group, and the water-gas tube group is connected to the flue pipe (13) through the micro-mist nozzle (1).

5. The flue duct spraying device for a roasting ring furnace according to claim 4, characterized in that: The tap water main pipe (11) is provided with a water circuit main valve (9), and the compressed air main pipe (12) is provided with an air circuit main valve (10).

6. A roasting ring furnace flue spray device according to claim 4 or 5, characterized in that: A plurality of micro-mist nozzles (1) are evenly distributed on the flue pipe (13).

7. The flue spray device for a roasting ring furnace according to claim 6, characterized in that: The flue pipe (13) is provided with a plurality of micro-mist nozzles (1) at different heights.

8. The flue spray device for a baking ring furnace according to claim 6, characterized in that: The spray volume of the micro-mist nozzle is 0.07L-0.09L / min.

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