Circulating cooling device of smelting tail gas desulfurization body

Abstract

The utility model discloses a circulating cooling device of a smelting tail gas desulfurization body. Comprising a desulfurization device body, a gas inlet pipeline inlet, a gas outlet pipeline outlet, a new water inlet pipeline, a liquid alkali inlet pipeline, an overflow port pipeline, an overflow groove, a wastewater collecting groove, a pit pump, a triple-effect evaporation outlet pipeline, a pit water inlet, a spraying pump, an inlet expansion joint, a spiral nozzle and an air cooling device, when the temperature of the smelting tail gas is high and is difficult to reduce, the high liquid level is controlled and the temperature of the internal solution is reduced by continuously supplementing new water at a low flow rate, and when the liquid level in the desulfurization device body is higher than the overflow port, the internal solution overflows from the pipeline of the overflow port and flows into the wastewater collecting tank along the overflow tank; and meanwhile, the overflow water can be pumped into the desulfurization device body through the pit pump, so that the desulfurization liquid is recycled, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal smelting tail gas treatment, in particular to a circulating cooling device for a smelting tail gas desulfurization body. Background Art

[0002] During the smelting process of rare and precious metals, the smelting flue gas composition and flue gas temperature fluctuate greatly due to the different raw materials added. The instantaneous temperature of the exhaust gas often exceeds the design value upper limit of the FRP material of the exhaust gas desulfurization body. In order to protect the FRP of the desulfurization body from high temperature damage as much as possible, effective cooling measures need to be taken. Utility Model Content

[0003] The utility model provides a circulating cooling device for a smelting tail gas desulfurization body, which can protect the desulfurization body glass fiber reinforced plastic from being damaged by high temperature when the tail gas instantaneous temperature exceeds the upper temperature limit of the desulfurization body glass fiber reinforced plastic.

[0004] To solve the above problems, the technical solutions provided by the present invention are as follows:

[0005] The utility model provides a circulating cooling device for a smelting tail gas desulfurization body, comprising a desulfurization device body (1), the top of which is connected to an air outlet pipe outlet (11); the left side of the desulfurization device body (1) is connected to an air intake pipe inlet (2), a new water inlet pipe (3), a liquid alkali inlet pipe (4) and an overflow pipe (5), wherein the overflow pipe (5) is below the liquid alkali inlet pipe (4); the right side of the desulfurization device body (1) is connected to a spray pump inlet pipe, wherein the spray pump inlet pipe is provided with an exhaust port (8), an inlet expansion joint (7) and a spray pump (9);

[0006] A spiral nozzle (10) is arranged in the desulfurization device body (1), and the spiral nozzle (10) is located above the inlet pipe of the spray pump. The spiral nozzle (10) is connected to two spray pumps (9) respectively; an overflow trough (6) is arranged below the desulfurization device body (1), one end of the overflow trough (6) is connected to the overflow port pipe (5), and the other end is connected to the wastewater collection trough (12); two pit pumps (13) are arranged on the wastewater collection trough (12), and the two pit pumps (13) pump the solution in the wastewater collection trough (12) back into the desulfurization device body (1) through the pit pump circulation outlet pipe (14), or pump it into the three-effect evaporation outlet pipe (17).

[0007] According to an optional embodiment of the utility model, the wastewater collection tank (12) is also provided with an air cooling device, the air cooling device comprising a galvanized steel pipe (15), a rubber hose (16), a stainless steel clamp (19), a flat air outlet (20) and a fan, the galvanized steel pipe (15) and the rubber hose (16) are connected by the stainless steel clamp (19), the flat air outlet (20) is located at the end of the galvanized steel pipe (15), and the flat air outlet (20) is arranged obliquely above the pit water inlet (18) of the wastewater collection tank (12), and the rubber hose (16) is connected to the air outlet of the fan.

[0008] According to an optional embodiment of the utility model, all pipes in the circulating cooling device are made of glass fiber reinforced plastics that are resistant to acid and alkali corrosion.

[0009] According to an optional embodiment of the utility model, the inlet expansion joint (7) is a stainless steel lined polytetrafluoroethylene expansion joint, which is detachable and used to alleviate vibration and facilitate maintenance and replacement.

[0010] According to an optional embodiment of the utility model, the spray pump (9) is used to pump the solution in the desulfurization device body (1) into the spiral nozzle (10) to form two upper and lower spray layers. When the hot exhaust gas at 110°C to 170°C flows back through the spray layer, the heat is absorbed and the temperature drops to 75°C to 85°C.

[0011] Compared with the prior art, the embodiment of the utility model provides a circulating cooling device for the smelting tail gas desulfurization body, which has the following beneficial effects: the circulating cooling device can blow off and cool the overflow water to the ambient temperature to achieve the purpose of further cooling, and at the same time, the overflow water can be pumped into the desulfurization device body through a pit pump, so that the desulfurization liquid can be recycled and the cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic structural diagram of a circulating cooling device for a smelting tail gas desulfurization body provided in an embodiment of the present application.

[0014] Figure 2 A schematic diagram of the structure of an air cooling device of a circulating cooling device for a smelting tail gas desulfurization body provided in an embodiment of the present application. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0016] like Figure 1 As shown, the embodiment of the utility model provides a circulating cooling device for a smelting tail gas desulfurization body, including a desulfurization device body 1, and the top of the desulfurization device body 1 is connected to an outlet pipe outlet 11. The left side of the desulfurization device body 1 is connected to an air intake pipe inlet 2, a new water inlet pipe 3, a liquid alkali inlet pipe 4 and an overflow pipe 5. The overflow pipe 5 is below the liquid alkali inlet pipe 4, and the overflow pipe 5 is preferably located at the upper part of the desulfurization device body 1. The right side of the desulfurization device body 1 is connected to a spray pump inlet pipe, and the spray pump inlet pipe is provided with an exhaust port 8, an inlet expansion joint 7 and a spray pump 9.

[0017] A spiral nozzle 10 is provided in the desulfurization device body 1. The spiral nozzle 10 is located above the inlet pipe of the spray pump and is connected to two spray pumps 9 respectively. An overflow tank 6 is provided below the desulfurization device body 1. One end of the overflow tank 6 is connected to the overflow pipe 5, and the other end is connected to the wastewater collection tank 12. Two pit pumps 13 are provided on the wastewater collection tank 12. The two pit pumps 13 pump the solution in the wastewater collection tank 12 back into the desulfurization device body 1 through the pit pump circulation outlet pipe 14, or pump it into the three-effect evaporation outlet pipe 17.

[0018] Figure 2 Combination Figure 1 The wastewater collecting tank 12 is also provided with an air cooling device, which includes a galvanized steel pipe 15, a rubber hose 16, a stainless steel clamp 19, a flat air outlet 20 and a fan. The galvanized steel pipe 15 and the rubber hose 16 are connected by the stainless steel clamp 19. The flat air outlet 20 is located at the end of the galvanized steel pipe 15, and the flat air outlet 20 is arranged obliquely above the pit water inlet 18 of the wastewater collecting tank 12. The rubber hose 16 is connected to the air outlet of the fan.

[0019] The material of all pipes in the desulfurization device body 1 and the circulating cooling device is glass fiber reinforced plastic material that is resistant to acid and alkali corrosion and can withstand high temperatures of 85° C. Preferably, the exhaust port 8 of the spray pump inlet pipe is kept slightly open for exhaust to prevent the spray pump 9 from cavitation.

[0020] The inlet expansion joint 7 is a stainless steel PTFE lined expansion joint, which is detachable and used to relieve vibration and facilitate maintenance and replacement. The spray pump 9 is used to pump the solution in the desulfurization device body 1 into the spiral nozzle 10 to form an upper and lower spray layer. When the hot tail gas at 110℃~170℃ flows through the spray layer in reverse flow, the heat is absorbed and the temperature drops to 75℃~85℃.

[0021] In particular, when the exhaust gas temperature is high and the spray layer is difficult to drop below 85°C, new water is continuously added to the desulfurization device body 1 at a low flow rate through the new water inlet pipe 3 to control the high liquid level and lower the internal solution temperature. When the liquid level in the desulfurization device body 1 is higher than the overflow pipe 5, the internal solution overflows from the overflow pipe 5 and flows into the wastewater collection tank 12 along the overflow tank 6.

[0022] When the temperature of the smelting tail gas is high and difficult to reduce, the high liquid level is controlled by continuously adding new water at a low flow rate. When the liquid level in the desulfurization device body 1 is higher than the overflow port, the internal solution overflows from the overflow port pipe 5 and flows into the wastewater collection tank 12 along the overflow tank 6.

[0023] In this embodiment, an air cooling device is arranged at the entrance of the wastewater collection tank. The galvanized steel pipe 15 is connected to the rubber hose 16 using a stainless steel clamp 19, and the outlet of the air cooling device is a flat air outlet 20, which is placed obliquely above the pit water inlet 18 to blow away the overflowing water and cool it to the ambient temperature.

[0024] When the wastewater collection tank 12 is full of water, the cooled solution is pumped into the pit pump circulation outlet pipe 14 by the pit pump 13 and enters the desulfurization device body 1 to achieve the effect of circulation cooling.

[0025] When the density of the solution in the desulfurization device body 1 reaches saturation or the circulating cooling effect of the wastewater collection tank 12 is not obvious, the pit pump 13 is turned on to pump the overflow water into the three-effect evaporation outlet pipe 17, and then new water and liquid alkali are continuously added to replace the solution in the desulfurization device body 1.

[0026] The above are only specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited to this. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present utility model within the spirit and principles of the present utility model should be covered within the protection scope of the present utility model; ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be based on the scope defined by the claims.

Claims

1. A circulating cooling device for the desulfurization of smelting tail gas, characterized in that: The desulfurization device comprises a desulfurization device body (1), the top of which is connected to an air outlet pipe outlet (11); the left side of the desulfurization device body (1) is connected to an air intake pipe inlet (2), a fresh water inlet pipe (3), a liquid alkali inlet pipe (4) and an overflow pipe (5), wherein the overflow pipe (5) is below the liquid alkali inlet pipe (4); the right side of the desulfurization device body (1) is connected to a spray pump inlet pipe, wherein the spray pump inlet pipe is provided with an exhaust port (8), an inlet expansion joint (7) and a spray pump (9); A spiral nozzle (10) is arranged in the desulfurization device body (1), and the spiral nozzle (10) is located above the inlet pipe of the spray pump. The spiral nozzle (10) is connected to two spray pumps (9) respectively; an overflow trough (6) is arranged below the desulfurization device body (1), one end of the overflow trough (6) is connected to the overflow port pipe (5), and the other end is connected to the wastewater collection trough (12); two pit pumps (13) are arranged on the wastewater collection trough (12), and the two pit pumps (13) pump the solution in the wastewater collection trough (12) back into the desulfurization device body (1) through the pit pump circulation outlet pipe (14), or pump it into the three-effect evaporation outlet pipe (17).

2. The circulating cooling device for the desulfurization of smelting tail gas according to claim 1 is characterized in that: The wastewater collection tank (12) is also provided with an air cooling device, which comprises a galvanized steel pipe (15), a rubber hose (16), a stainless steel clamp (19), a flat air outlet (20) and a fan. The galvanized steel pipe (15) and the rubber hose (16) are connected via the stainless steel clamp (19). The flat air outlet (20) is located at the end of the galvanized steel pipe (15), and the flat air outlet (20) is arranged obliquely upward toward the pit water inlet (18) of the wastewater collection tank (12). The rubber hose (16) is connected to the air outlet of the fan.

3. The circulating cooling device for the desulfurization of smelting tail gas according to claim 1 is characterized in that: All pipes in the circulating cooling device are made of glass fiber reinforced plastics that are resistant to acid and alkali corrosion.

4. The circulating cooling device for the smelting tail gas desulfurization body according to claim 1 is characterized in that: The inlet expansion joint (7) is a stainless steel lining polytetrafluoroethylene expansion joint, which is detachable and used to alleviate vibration and facilitate maintenance and replacement.

5. The circulating cooling device for the smelting tail gas desulfurization body according to claim 1 is characterized in that: The spray pump (9) is used to pump the solution in the desulfurization device body (1) into the spiral nozzle (10) to form two upper and lower spray layers. When the hot exhaust gas at 110°C to 170°C flows countercurrently through the spray layer, the heat is absorbed and the temperature drops to 75°C to 85°C.

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