Device for restraining and recycling cold waste gas of sintering ring

Abstract

The utility model discloses a device for restraining and recycling sintering circular cooling waste gas, which belongs to the field of sintering circular cooler equipment and comprises a sintering machine and a circular cooler, an air bellow of the sintering machine is provided with an air bellow branch pipe used for taking smoke of the sintering machine, the air bellow branch pipe is connected with a hot section circulating fan, and the tail end of the air bellow branch pipe is connected with an air mixing chamber. A low-temperature branch pipe is arranged on the circular cooler low-temperature section, a cold section circulating fan is connected to the low-temperature branch pipe, and an air mixing chamber is connected to the tail end of the low-temperature branch pipe; and the air mixing chamber is connected to a sintering material surface circulating sealing cover of the sintering machine through a pipeline. According to the utility model, the amount of discharged smoke can be reduced, heat taken away by the discharged smoke is reduced, and heat loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sintering ring cooler equipment, and in particular to a device for suppressing and recovering sintering ring cooling exhaust gas. Background Technology

[0002] In traditional sintering ring cooling production processes, a significant amount of waste gas is generated. Direct emission of this waste gas, containing pollutants such as SO2 and NOx, would negatively impact the atmospheric environment and fail to meet environmental protection requirements. Therefore, waste gas treatment is necessary. However, the high flue temperature in traditional sintering ring cooling processes generates substantial amounts of waste gas, making treatment costly. To improve production efficiency and reduce costs, it is essential to control waste gas emissions, reducing their quantity and lowering the cost of tail gas purification. Furthermore, the emitted waste gas contains latent and sensible heat, which can be effectively recovered and utilized; direct emission would result in energy waste. Utility Model Content

[0003] The technical problem this invention aims to solve is to provide a device for suppressing and recovering cold exhaust gas from sintering rings. This can reduce flue gas emissions, decrease solid fuel consumption, and improve the economic benefits of enterprises.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a device for suppressing and recovering sintering ring cooler exhaust gas, including a sintering machine and a ring cooler. The sintering machine's air box is provided with an air box branch pipe for taking out the sintering machine flue gas. A hot section circulating fan is connected to the air box branch pipe, and a mixing chamber is connected to the end of the air box branch pipe. A low-temperature branch pipe is provided on the low-temperature section of the ring cooler. A cold section circulating fan is connected to the low-temperature branch pipe, and a mixing chamber is connected to the end of the low-temperature branch pipe. The mixing chamber is connected to the sintering material surface circulation sealing cover of the sintering machine through a pipe.

[0005] A further improvement of this utility model is that a multi-tube dust collector is installed on the wind box branch pipe.

[0006] A further improvement to the technical solution of this utility model is that a gravity dust collector is installed on the low-temperature branch pipe.

[0007] A further improvement of this utility model is that the low-temperature section of the annular cooler consists of three sections.

[0008] A further improvement of this utility model is that a main steam pipe is installed above the sintering material surface circulation sealing cover, and multiple steam branch pipes branch out from the main steam pipe and extend into the interior of the sintering material surface circulation sealing cover. Several steam nozzles are alternately arranged on the left and right sides of the extension end of the steam branch pipes extending into the interior of the sintering material surface circulation sealing cover.

[0009] A further improvement of this utility model is that: a waste gas recovery main pipe is provided on the mixing chamber, and multiple waste gas recovery branch pipes are branched off from the waste gas recovery main pipe, which are connected to the sintering material surface circulation sealing cover of the sintering machine.

[0010] The technological advancements achieved by this invention, due to the adoption of the aforementioned technical solutions, are as follows: By setting up low-temperature branch pipes and wind box branch pipes, the exhaust gas from the low-temperature section of the annular cooler and the sintering machine is pressurized and introduced into the circulating sealed cover of the sintering material surface. Dust in the exhaust gas is partially adsorbed and retained in the sintering material layer. SO2 and NOx in the flue gas are partially reduced through reaction, and dioxins are pyrolyzed at high temperatures. This effectively reduces the emission of harmful substances per unit output. Simultaneously, the hot flue gas is recycled, significantly reducing the amount of exhaust gas, thus reducing the heat carried away by the exhaust gas, reducing heat loss, and consequently reducing solid fuel consumption and saving energy. Furthermore, by setting up steam pipes, low-pressure steam can be introduced to the sintering material surface, working in conjunction with flue gas circulation to reduce sintering carbon monoxide, further reducing sintering carbon monoxide emissions. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Among them, 1. Sintering machine, 11. Sintering material surface circulation sealing cover, 2. Circulating cooler, 21. Three-section circulating cooler, 3. Gravity dust collector, 4. Cold section circulating fan, 5. Mixing chamber, 6. Hot section circulating fan, 7. Multi-tube dust collector, 8. Steam main pipeline, 81. Steam branch pipe, 82. Steam nozzle. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to embodiments:

[0015] like Figure 1The diagram shows a structural schematic of a device for suppressing and recovering sintering ring cooler exhaust gas, including a sintering machine 1 and a ring cooler 2. In the sintering machine 1, the surface of the sintering material is ignited, and the lower air box draws air to cause the material layer to burn from top to bottom, while the air box extracts high-temperature flue gas. An air box branch pipe is installed at the air box of the sintering machine to extract and recover a portion of the high-temperature flue gas. A hot-section circulating fan 6 is connected to the air box branch pipe to guide the flue gas within the air box branch pipe. A multi-tube dust collector 7 is installed in front of the hot-section circulating fan 6 on the air box branch pipe. A mixing chamber 5 is connected to the end of the air box branch pipe; that is, the flue gas in the air box branch pipe first enters the multi-tube dust collector 7 under the guidance of the hot-section circulating fan 6 for preliminary dust removal before being guided into the mixing chamber 5. A low-temperature branch pipe is connected to the low-temperature section of the ring cooler 2. The ring cooler is divided into four zones, with temperatures decreasing from high to low: zone 1, zone 2, zone 3, and zone 4. In this embodiment, the low-temperature section is the third section 21 of the annular cooler. A low-temperature branch pipe is connected to the top of the third section 21 of the annular cooler to draw in the low-temperature flue gas from the third section inside the annular cooler 2. Electronic regulating valves are installed on both the air box branch pipe and the low-temperature branch pipe. A cold section circulating fan 4 is connected to the low-temperature branch pipe to guide the flue gas in the low-temperature branch pipe. A gravity dust collector 3 is installed in front of the cold section circulating fan 4 on the low-temperature branch pipe, and a mixing chamber 5 is connected to the end of the low-temperature branch pipe. The flue gas in the low-temperature branch pipe enters the gravity dust collector 3 for dust removal under the guidance of the cold section circulating fan 4, and then is guided into the mixing chamber 5. In this embodiment, the air box branch pipe and the low-temperature branch pipe share a mixing chamber, where the low-temperature flue gas and the high-temperature flue gas are mixed. The mixing chamber 5 is connected to the sintering material surface circulation sealing cover 11 of the sintering machine 1 through a pipe. In this embodiment, a waste gas recovery main pipe 9 is connected to the air outlet of the mixing chamber 5. Multiple waste gas recovery branch pipes 91 branch off from the waste gas recovery main pipe 9, and the multiple waste gas recovery branch pipes 91 are evenly connected to the top of the sintering material surface circulation sealing cover 11 of the sintering machine 1. At the same time, a steam main pipe 8 is erected above the sintering material surface circulation sealing cover 11, and low-pressure steam is circulated inside. Multiple steam branch pipes 81 branch off from the steam main pipe 8, and the multiple steam branch pipes 81 are evenly distributed and extend into the interior of the sintering material surface circulation sealing cover 11. Several steam nozzles 82 are alternately arranged on the left and right sides of the extension end of each steam branch pipe 81 that extends into the interior of the sintering material surface circulation sealing cover 11. Low-pressure steam is evenly introduced to the sintering material surface inside the sealed cover through steam nozzle 82. This steam, combined with the exhaust gas from the mixing chamber 5, passes through the sintering material layer, causing some harmful substances in the flue gas to undergo chemical changes or be inhibited. Specifically, dust in the flue gas is partially adsorbed and retained in the sintering material layer, SO2 and NOx in the circulating flue gas are partially reduced through reaction, and partial combustion occurs under high temperature conditions. Dioxins are pyrolyzed at high temperatures. This reduces the emission of harmful substances per unit output. The hot flue gas is recycled, significantly reducing the amount of exhaust gas and the heat carried away by the exhaust gas, thus reducing heat loss, lowering solid fuel consumption, and saving energy.

[0016] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A device for suppressing and recovering sintering ring cooler exhaust gas, comprising a sintering machine (1) and a ring cooler (2), characterized in that: The sintering machine (1) is equipped with a blast box branch pipe for taking out the flue gas of the sintering machine. A hot section circulating fan (6) is connected to the blast box branch pipe, and a mixing chamber (5) is connected to the end of the blast box branch pipe. The low temperature section of the cooling machine (2) is equipped with a low temperature branch pipe, a cold section circulating fan (4) is connected to the low temperature branch pipe, and a mixing chamber (5) is connected to the end of the low temperature branch pipe. The mixing chamber (5) is connected to the sintering material surface circulation sealing cover (11) of the sintering machine (1) through a pipe.

2. The device for suppressing and recovering sintering ring cold exhaust gas according to claim 1, characterized in that: A multi-tube dust collector (7) is installed on the branch pipe of the air box.

3. The device for suppressing and recovering sintering ring cold exhaust gas according to claim 1, characterized in that: A gravity dust collector (3) is installed on the low-temperature branch pipe.

4. The device for suppressing and recovering sintering ring cold exhaust gas according to claim 1, characterized in that: The low-temperature section of the annular cooler (2) is the three sections (21) of the annular cooler.

5. The device for suppressing and recovering sintering ring cold exhaust gas according to claim 1, characterized in that: A main steam pipe (8) is installed above the sintering material surface circulation sealing cover (11). Multiple steam branch pipes (81) branch out from the main steam pipe (8) and extend into the sintering material surface circulation sealing cover (11). Several steam nozzles (82) are alternately arranged on the left and right sides of the extension end of the steam branch pipe (81) extending into the sintering material surface circulation sealing cover (11).

6. The device for suppressing and recovering sintering ring cold exhaust gas according to claim 5, characterized in that: The mixing chamber (5) is equipped with a waste gas recovery main pipe (9), and multiple waste gas recovery branch pipes (91) branch out from the waste gas recovery main pipe (9). The waste gas recovery branch pipes (91) are connected to the sintering material surface circulation sealing cover (11) of the sintering machine (1).

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