Flue gas treatment system for electrode paste calcination

Abstract

The utility model relates to the technical field of flue gas treatment. The flue gas treatment system for electrode paste calcination comprises a shell-and-tube water cooling device, a circulating water heating device, a shell-and-tube air cooling device, a fan, a water film dedusting and cooling device and a desulfurizing tower, and a tube pass inlet of the shell-and-tube water cooling device is connected with a flue gas outlet of a calcining furnace through a pipeline; a shell pass inlet of the shell-and-tube water cooling device is connected with a water outlet of the circulating water heating device, a shell pass outlet of the shell-and-tube water cooling device is connected with a water inlet of the circulating water heating device, and a shell pass outlet of a shell pass of the shell-and-tube water cooling device is connected with a shell pass inlet of the shell-and-tube air cooling device through a pipeline. A shell pass outlet of the shell-and-tube air cooling device is connected with an air inlet of the fan through a pipeline, an air outlet of the fan is connected with an air inlet of the water film dedusting and cooling device through a pipeline, and an air outlet of the water film dedusting and cooling device is connected with an air inlet of the desulfurizing tower through a pipeline. According to the utility model, the damage to the desulfurizing tower is small, and the service life of the desulfurizing tower is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and in particular to a flue gas treatment system for electrode paste calcination. Background Technology

[0002] The flue gas generated during the calcination of electrode paste has high dust content, high temperature, and high sulfur content. Direct desulfurization would severely damage the desulfurization equipment. If a baghouse dust collector is used first, the high-temperature flue gas would also damage the collector. Generally, the flue gas needs to be cooled before dust removal, or both cooling and dust removal can be performed simultaneously, followed by desulfurization. In practical applications, spray towers are mainly used for cooling and dust removal. However, this process wastes heat, has a slow cooling rate, and requires a large space, resulting in high equipment costs. Summary of the Invention

[0003] In view of this, it is necessary to provide a flue gas treatment system for electrode paste calcination that can make full use of the heat of the flue gas while efficiently removing dust and cooling it.

[0004] A flue gas treatment system for electrode paste calcination includes a shell-and-tube water cooling device, a circulating water heating device, a shell-and-tube air cooling device, a fan, a water film dust removal and cooling device, and a desulfurization tower. The tube-side inlet of the shell-and-tube water cooling device is connected to the flue gas outlet of the calcining furnace via a pipe. The shell-side inlet of the shell-and-tube water cooling device is connected to the outlet of the circulating water heating device. The shell-side outlet of the shell-and-tube water cooling device is connected to the shell-side inlet of the shell-and-tube air cooling device via a pipe. The shell-side outlet of the shell-and-tube air cooling device is connected to the air inlet of the fan via a pipe. The air outlet of the fan is connected to the air inlet of the water film dust removal and cooling device via a pipe. The air outlet of the water film dust removal and cooling device is connected to the air inlet of the desulfurization tower via a pipe.

[0005] Preferably, the shell-and-tube water-cooling device includes a first shell, two first partitions, and a plurality of parallel first flue gas tubes. The first shell is horizontally arranged, and the two first partitions divide the first shell into three areas: a first smoke inlet chamber, a water-cooling chamber, and a first smoke exhaust chamber. The first partitions are provided with a plurality of flue gas holes. The first flue gas tubes are horizontally arranged in the water-cooling chamber and communicate with the flue gas holes. One side of the water-cooling chamber is provided with a water inlet and connected to the water outlet of the circulating water heating device, and the other side of the water-cooling chamber is provided with a water outlet and connected to the water inlet of the circulating water heating device. The first smoke inlet chamber is provided with a smoke inlet, and the first smoke exhaust chamber is provided with a smoke exhaust outlet.

[0006] Preferably, the shell-and-tube air-cooled device includes a second shell, two second partitions, and a plurality of parallel second flue gas tubes. The second shell is vertically arranged, and the two second partitions divide the second shell into three areas: a second smoke inlet chamber, an air-cooling chamber, and a second smoke exhaust chamber. The second partitions are provided with a plurality of flue gas holes. The second flue gas tubes are vertically arranged in the air-cooling chamber and communicate with the flue gas holes. The second smoke inlet chamber is provided with a smoke inlet, the air-cooling chamber is provided with an air inlet and an air outlet, the side of the second smoke exhaust chamber is provided with a smoke exhaust port, and the bottom of the second smoke exhaust chamber is provided with an ash discharge port.

[0007] Preferably, the water film dust removal and cooling device includes a closed shell and several water film plates. The water film plates are horizontally arranged in the closed shell, and adjacent water film plates are staggered to form an S-shaped flue gas channel inside the closed shell. A water inlet pipe is provided above the water film plates so that cooling water forms a water film on the water film plates. The closed shell is also provided with an air inlet and an air outlet. The air inlet of the closed shell is connected to the fan through a pipe, and the air outlet of the closed shell is connected to the desulfurization tower through a pipe.

[0008] Preferably, the water film plate is tilted downwards at 5 to 10 degrees to make the water film more uniform.

[0009] Beneficial Effects: The flue gas treatment system for electrode paste calcination of this utility model first cools the high-temperature flue gas through a shell-and-tube water-cooling device. The heated cooling water is then discharged through a circulating water heating device to provide heating for the working and living areas. The cooled water, after being cooled for heating, flows back into the shell-and-tube water-cooling device. In this way, the heat in the flue gas can be effectively utilized. After the flue gas is cooled, it passes through a shell-and-tube air-cooling device, where the outside air further cools the flue gas. Some dust naturally settles to the bottom of the shell-and-tube air-cooling device, achieving preliminary dust removal. Then, the flue gas is transported by a fan to a water film dust removal and cooling device, where the water film fully cools and removes dust, thereby significantly reducing the temperature and dust content of the flue gas. Finally, it enters the desulfurization tower for desulfurization treatment. Because the temperature and dust content of the flue gas have been significantly reduced, the damage to the desulfurization tower is minimized, extending the service life of the desulfurization tower. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the flue gas treatment system for electrode paste calcination according to the present invention.

[0011] Figure 2 This is a partial structural schematic diagram of the flue gas treatment system for electrode paste calcination according to this utility model.

[0012] Figure 3 This is a schematic diagram of the shell-and-tube air-cooled device of this utility model.

[0013] Figure 4 This is a cross-sectional view of the shell-and-tube air-cooled device of this utility model.

[0014] Figure 5 This is a schematic diagram of the structure of the water film dust removal and cooling device of this utility model.

[0015] Figure 6 This is a perspective view of the water film dust removal and cooling device of this utility model.

[0016] In the figure: 10 for flue gas treatment system for electrode paste calcination, 20 for shell-and-tube water cooling device, 201 for first shell, 202 for first baffle plate, 203 for first flue gas tube, 30 for circulating water heating device, 40 for shell-and-tube air cooling device, 401 for second shell, 4011 for second flue gas inlet chamber, 4012 for air cooling chamber, 4013 for second flue gas exhaust chamber, 402 for second baffle plate, 403 for second flue gas tube, 50 for fan, 60 for water film dust removal and cooling device, 60 for enclosed shell, 602 for water film plate, and 70 for desulfurization tower. Detailed Implementation

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Please refer to Figure 1 and Figure 2 A flue gas treatment system 10 for electrode paste calcination includes a shell-and-tube water cooling device 20, a circulating water heating device 30, a shell-and-tube air cooling device 40, a fan 50, a water film dust removal and cooling device 60, and a desulfurization tower 70. The tube-side inlet of the shell-and-tube water cooling device 20 is connected to the flue gas outlet of the calcining furnace via a pipe, the shell-side inlet of the shell-and-tube water cooling device 20 is connected to the outlet of the circulating water heating device 30, and the shell-side outlet of the shell-and-tube water cooling device 20 is connected to... The inlet of the circulating water heating device 30 is connected to the tube side outlet of the shell-and-tube water cooling device 20 and the shell side inlet of the shell-and-tube air cooling device 40 through a pipe. The shell side outlet of the shell-and-tube air cooling device 40 is connected to the air inlet of the fan 50 through a pipe. The air outlet of the fan 50 is connected to the air inlet of the water film dust removal and cooling device 60 through a pipe. The air outlet of the water film dust removal and cooling device 60 is connected to the air inlet of the desulfurization tower 70 through a pipe.

[0019] This invention utilizes a non-contact water-cooling method to cool the flue gas at its highest temperature, resulting in high heat exchange efficiency. Once the water temperature rises, the hot water is transferred to the heating area via a circulating water heating device 30. For example, if the circulating water heating device 30 is equipped with underfloor heating pipes, it can provide heating for offices, workshops, and employee dormitories where underfloor heating pipes are installed. Furthermore, the circulating water heating device 30 can preheat raw materials and dry the mixed and molded electrode paste, thus significantly reducing energy consumption during electrode paste production.

[0020] In a preferred embodiment, the circulating water heating device 30 includes a circulating water pump and heating pipes. The heating pipes can be underfloor heating pipes, or they can be installed on the wall. Of course, they can also be connected to radiators or the like for heating, or they can be used for hot water bathing, etc.

[0021] In a preferred embodiment, the shell-and-tube water-cooling device 20 includes a first shell 201, two first partitions 202, and a plurality of parallel first flue gas tubes 203. The first shell 201 is horizontally arranged, and the two first partitions 202 divide the first shell 201 into three regions: a first smoke inlet chamber, a water-cooling chamber, and a first smoke exhaust chamber. The first partitions 202 are provided with a plurality of flue gas holes. The first flue gas tubes 203 are horizontally arranged in the water-cooling chamber and communicate with the flue gas holes. One side of the water-cooling chamber is provided with a water inlet and connected to the water outlet of the circulating water heating device 30, and the other side of the water-cooling chamber is provided with a water outlet and connected to the water inlet of the circulating water heating device 30. The first smoke inlet chamber is provided with a smoke inlet, and the first smoke exhaust chamber is provided with a smoke exhaust outlet.

[0022] As the flue gas passes through the first flue gas tube 203, it is cooled by cooling water, and correspondingly, the cooling water is heated. In a preferred embodiment, the first flue gas tube 203 is made of a corrosion-resistant material with good thermal conductivity, such as stainless steel.

[0023] The shell-and-tube water cooling device 20 uses a horizontal heat exchange method. In order to increase the flue gas travel, the first flue gas tube 203 is preferably spiral.

[0024] In a preferred embodiment, please refer to Figure 3 and Figure 4The shell-and-tube air-cooled device 40 includes a second shell 401, two second partitions 402, and several parallel second flue gas tubes 403. The second shell 401 is vertically arranged. The two second partitions 402 divide the second shell 401 into three areas: a second smoke inlet chamber 4011, an air-cooling chamber 4012, and a second smoke exhaust chamber 4013. The second partitions 402 are provided with several flue gas holes. The second flue gas tubes 403 are vertically arranged in the air-cooling chamber 4012 and communicate with the flue gas holes. The second smoke inlet chamber 4011 is provided with a smoke inlet. The air-cooling chamber 4012 is provided with an air inlet and an air outlet. The second smoke exhaust chamber 4013 is provided with a smoke exhaust port on its side and an ash discharge port at its bottom.

[0025] In a preferred embodiment, the second smoke inlet chamber 4011 is located below the air-cooled chamber 4012 and above the air-cooled chamber 4012. The flue gas enters the second smoke inlet chamber 4011 horizontally. When it hits the inner wall of the chamber or rises, the dust in the flue gas settles to the bottom of the second smoke inlet chamber 4011 due to gravity. When a lot of dust accumulates, it is discharged through the ash discharge port.

[0026] The shell-and-tube air-cooled device 40 can significantly reduce the flue gas temperature, preventing excessively high flue gas temperature from causing a large amount of water vapor to be generated after the flue gas enters the water film dust removal and cooling device 60, which would then combine with sulfur compounds in the flue gas and corrode the pipes.

[0027] In a preferred embodiment, please refer to Figure 5 and Figure 6 The water film dust removal and cooling device 60 includes a closed shell 601 and several water film plates 602. The water film plates 602 are horizontally arranged in the closed shell 601, and adjacent water film plates 602 are staggered to form an S-shaped flue gas channel inside the closed shell 601. A water inlet pipe is provided above the water film plates 602 so that cooling water forms a water film on the water film plates 602. The closed shell 601 is also provided with an air inlet and an air outlet. The air inlet of the closed shell 601 is connected to the fan 50 through a pipe, and the air outlet of the closed shell 601 is connected to the desulfurization tower 70 through a pipe.

[0028] In a preferred embodiment, the water film plate 602 is tilted downwards at 5 to 10 degrees in order to make the water film more uniform.

[0029] The cooled flue gas is only a few tens of degrees Celsius, which causes very little damage to the desulfurization tower and can be ignored.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A flue gas treatment system for electrode paste calcination, characterized in that: The system includes a shell-and-tube water-cooled device, a circulating water heating device, a shell-and-tube air-cooled device, a fan, a water film dust removal and cooling device, and a desulfurization tower. The tube-side inlet of the shell-and-tube water-cooled device is connected to the flue gas outlet of the calcining furnace via a pipe. The shell-side inlet of the shell-and-tube water-cooled device is connected to the outlet of the circulating water heating device. The shell-side outlet of the shell-and-tube water-cooled device is connected to the shell-side inlet of the shell-and-tube air-cooled device via a pipe. The shell-side outlet of the shell-and-tube air-cooled device is connected to the air inlet of the fan via a pipe. The air outlet of the fan is connected to the air inlet of the water film dust removal and cooling device via a pipe. The air outlet of the water film dust removal and cooling device is connected to the air inlet of the desulfurization tower via a pipe.

2. The flue gas treatment system for electrode paste calcination as described in claim 1, characterized in that: The shell-and-tube water-cooling device includes a first shell, two first partitions, and several parallel first flue gas tubes. The first shell is horizontally positioned, and the two first partitions divide the first shell into three areas: a first smoke inlet chamber, a water-cooling chamber, and a first smoke exhaust chamber. The first partitions are provided with several flue gas holes. The first flue gas tubes are horizontally positioned in the water-cooling chamber and communicate with the flue gas holes. One side of the water-cooling chamber is provided with a water inlet and connected to the outlet of the circulating water heating device, and the other side of the water-cooling chamber is provided with a water outlet and connected to the inlet of the circulating water heating device. The first smoke inlet chamber is provided with a smoke inlet, and the first smoke exhaust chamber is provided with a smoke exhaust outlet.

3. The flue gas treatment system for electrode paste calcination as described in claim 1, characterized in that: The shell-and-tube air-cooled device includes a second shell, two second partitions, and several parallel second flue gas tubes. The second shell is vertically arranged, and the two second partitions divide the second shell into three areas: a second smoke inlet chamber, an air-cooling chamber, and a second smoke exhaust chamber. The second partitions are provided with several flue gas holes. The second flue gas tubes are vertically arranged in the air-cooling chamber and communicate with the flue gas holes. The second smoke inlet chamber is provided with a smoke inlet, the air-cooling chamber is provided with an air inlet and an air outlet, the side of the second smoke exhaust chamber is provided with a smoke exhaust port, and the bottom of the second smoke exhaust chamber is provided with an ash discharge port.

4. The flue gas treatment system for electrode paste calcination as described in claim 1, characterized in that: The water film dust removal and cooling device includes a closed shell and several water film plates. The water film plates are horizontally arranged in the closed shell, and adjacent water film plates are staggered to form an S-shaped flue gas channel inside the closed shell. A water inlet pipe is provided above the water film plates so that cooling water forms a water film on the water film plates. The closed shell is also provided with an air inlet and an air outlet. The air inlet of the closed shell is connected to the fan through a pipe, and the air outlet of the closed shell is connected to the desulfurization tower through a pipe.

5. The flue gas treatment system for electrode paste calcination as described in claim 4, characterized in that: The water film plate is tilted downwards at 5 to 10 degrees to make the water film more uniform.

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