Copper electrolyte evaporation tail gas white removal system

Abstract

The utility model relates to a copper electrolyte evaporation tail gas white removal system, and belongs to the technical field of copper smelting. Comprising a spray tower, an induced draft fan, a white smoke removal device, a cold water circulating pump, a cold water tank, a hot water tank and a hot water circulating pump, the gas inlet end of the spray tower is connected with an evaporation tail gas discharge pipe through a pipeline, the gas outlet end of the spray tower is connected with the gas inlet end of the induced draft fan through a pipeline, the gas outlet end of the induced draft fan is connected with the gas inlet end of the white smoke removal device through a pipeline, and the gas outlet end of the white smoke removal device is connected with the chimney through a pipeline; according to the device, pollutants such as acidic substances and dust particles in the evaporated tail gas are removed through the spray tower, and then moisture in the tail gas is effectively removed through the white smoke removal device, so that the technical problem that the discharged tail gas forms white smoke is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of copper smelting technology, and in particular to a copper electrolyte evaporation tail gas whitening system. Background Technology

[0002] After the electrolyte in a copper electrolysis plant evaporates, it is traditionally discharged into the atmosphere through exhaust pipes. Because the ambient temperature is lower than the flue gas temperature, the water vapor in the saturated, humid flue gas undergoes a rapid phase change upon encountering the cold air. The moisture in the saturated, humid flue gas condenses into small droplets, forming a mist-like vapor at the chimney opening. This mist-like vapor exhibits subtle color changes due to factors such as the background color of the sky, lighting conditions, and viewing angle, thus forming white smoke. However, with the increasingly severe environmental situation, the white smoke phenomenon has been considered a contributor to smog and has been questioned by the public. Calls for white smoke control are growing louder, placing significant pressure on enterprise production and environmental protection.

[0003] Meanwhile, the evaporated gases from the electrolyte contain SO3 and H2SO4, which significantly increases the concentration of environmental pollution near the chimney. Combined with meteorological conditions and operating conditions, acid mist will appear in the area near the chimney. If this acid mist persists for a long time, it will damage buildings and vegetation.

[0004] Therefore, in order to remove moisture and pollutants such as dust particles from wet flue gas, it is necessary to provide a copper electrolyte evaporation tail gas whitening system to eliminate the white flue gas generated by electrolyte evaporation and reduce the risk of environmental pollution. Utility Model Content

[0005] To solve or partially solve the problems existing in related technologies, this utility model provides a copper electrolyte evaporation tail gas whitening system, which aims to eliminate white smoke and acidic pollutants in the exhaust gas.

[0006] The aforementioned copper electrolyte evaporation tail gas whitening system includes a spray tower, an induced draft fan, a whitening device, a cold water circulating pump, a cold water tank, a hot water tank, and a hot water circulating pump.

[0007] The air inlet of the spray tower is connected to the evaporation exhaust pipe via a pipe, the air outlet of the spray tower is connected to the air inlet of the induced draft fan via a pipe, the air outlet of the induced draft fan is connected to the air inlet of the whitening device via a pipe, and the air outlet of the whitening device is connected to the chimney via a pipe.

[0008] The inlet of the cold water circulation pump is connected to the cold water tank through a pipe, and the outlet of the cold water circulation pump is connected to the inlet of the spray tower and the inlet of the whitening device through pipes respectively. The outlet of the spray tower and the outlet of the whitening device are connected to the hot water tank through pipes respectively.

[0009] The inlet of the hot water circulation pump is connected to the hot water tank via a pipe, the outlet of the hot water circulation pump is connected to the inlet of the cooling tower via a pipe, and the outlet of the cooling tower is connected to the cold water tank via a pipe.

[0010] In some embodiments, the spray tower includes a tower body, guide plates, baffles, and deflectors;

[0011] The tower body has a water storage tank at its bottom, and a spiral guide plate above the water storage tank. The guide plate divides the internal cavity of the tower body into a spiral gas channel, and an air inlet is provided at the bottom of the gas channel. Baffles are spaced apart on the guide plate, and water curtain forming holes are provided on the guide plate corresponding to the baffles. A spray pipe is provided above the guide plate, and the spray pipe is connected to the outlet of the circulating pump through a pipe. The inlet of the circulating pump is connected to the water storage tank.

[0012] The spray pipe is provided with baffles at even intervals above it, thereby forming a spray water recovery channel between two adjacent baffles; a cooling channel is constructed inside the baffle, the upper end of the cooling channel is the water inlet end, and the lower end of the cooling channel is the water outlet end.

[0013] The top of the tower is equipped with an air vent.

[0014] In some embodiments, the whitening device includes a housing, a cyclone cone, and a condenser plate;

[0015] The outer shell is provided with a cyclone cone and a condenser plate from bottom to top. The bottom of the cyclone cone is provided with an air inlet pipe, and the air inlet pipe is tangent to the cyclone cone.

[0016] The condenser plates are evenly spaced, and each condenser plate has a condensation chamber inside. The upper end of the condensation chamber is the water inlet, and the lower end is the water outlet.

[0017] The top of the outer casing is provided with an air vent.

[0018] In some designs, the condenser plate is corrugated.

[0019] In some designs, a stirring shaft is rotatably mounted inside the cyclone cone, the stirring shaft is connected to a stirring motor, and stirring blades are provided on the stirring shaft.

[0020] The technical solution provided by this utility model can include the following beneficial effects:

[0021] This application first uses a spray tower to remove acidic substances and dust particles and other pollutants from the evaporation exhaust gas, and then uses a de-whitening device to effectively remove moisture from the exhaust gas, thereby effectively avoiding the technical problem of white smoke formation from the exhaust gas.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0023] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0024] Figure 1 This is a schematic diagram of the pipeline connection of the whitening system shown in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the spray tower of the whitening system shown in an embodiment of the present invention;

[0026] Figure 3 This is another structural schematic diagram of the spray tower of the whitening system shown in this embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the whitening device of the whitening system shown in an embodiment of the present invention;

[0028] Figure label:

[0029] 1. Spray tower; 101. Tower body; 102. Guide plate; 103. Baffle; 104. Deflector plate; 105. Gas passage; 106. Cooling channel; 107. Water storage tank; 108. Water curtain forming hole; 109. Spray pipe; 1010. Circulating pump; 1011. Spray water recovery channel; 2. Exhaust fan; 3. Whitening device; 301. Outer shell; 302. Cyclone cone; 303. Condensing plate; 304. Stirring shaft; 305. Stirring motor; 306. Stirring blades; 307. Air inlet pipe; 308. Drain pipe; 309. Condensation chamber; 4. Cold water circulating pump; 5. Cold water tank; 6. Hot water tank; 7. Hot water circulating pump; 8. Cooling tower. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the content described.

[0031] Please see Figure 1 This application provides a copper electrolyte evaporation tail gas whitening system, including a spray tower 1, an induced draft fan 2, a whitening device 3, a cold water circulation pump 4, a cold water tank 5, a hot water tank 6, and a hot water circulation pump 7.

[0032] The liquid medium in spray tower 1 is selected as alkaline solution to neutralize SO3 and H2SO4 in the flue gas, thereby achieving the purpose of removing acidic pollutants from the flue gas.

[0033] The evaporation tail gas discharge pipe is the electrolyte vapor discharge pipe within the plant area. The air inlet of the spray tower 1 is connected to the evaporation tail gas discharge pipe through a pipe to introduce the evaporation tail gas into the spray tower 1, i.e., into this system. The air outlet of the spray tower 1 is connected to the air inlet of the induced draft fan 2 through a pipe. The air outlet of the induced draft fan 2 is connected to the air inlet of the whitening device 3 through a pipe. The air outlet of the whitening device 3 is connected to the chimney through a pipe.

[0034] During operation, the electrolyte evaporation exhaust gas is introduced into the spray tower 1 through the evaporation exhaust gas discharge pipe. The spray tower 1 absorbs pollutants such as acidic substances and dust particles in the exhaust gas. Then, the treated exhaust gas is introduced into the whitening device 3 by the induced draft fan 2 to remove excess moisture in the exhaust gas, so as to avoid the generation of white smoke. Finally, it is discharged from the chimney.

[0035] The inlet of the cold water circulating pump 4 is connected to the cold water tank 5 via a pipe, and the outlet of the cold water circulating pump 4 is connected to the inlet of the spray tower 1 and the inlet of the whitening device 3 via pipes respectively. The outlets of the spray tower 1 and the whitening device 3 are connected to the hot water tank 6 via pipes respectively. The inlet of the hot water circulating pump 7 is connected to the hot water tank 6 via a pipe, and the outlet of the hot water circulating pump 7 is connected to the inlet of the cooling tower 8 via a pipe. The outlet of the cooling tower 8 is connected to the cold water tank 5 via a pipe.

[0036] During operation, the cold water tank 5 provides the necessary cold water to the spray tower 1 and the whitening device 3. The cold water is introduced into the spray tower 1 and the whitening device 3 through the cold water circulation pump 4. When the cold water passes through the spray tower 1 and the whitening device 3, it is heated to form hot water. The hot water from the spray tower 1 and the whitening device 3 flows back into the hot water tank 6 through pipes for storage. The hot water in the hot water tank 6 is introduced into the cooling tower 8 through the hot water circulation pump 7 for cooling, and then introduced into the cold water tank 5 to realize the recycling of water.

[0037] In some specific implementations, such as Figure 2 and Figure 3As shown, the spray tower 1 includes a tower body 101, a guide plate 102, a baffle 103, and a baffle plate 104. A water storage tank 107 is provided at the bottom of the tower body 101. A spiral guide plate 102 is provided above the water storage tank 107. The guide plate 102 divides the internal cavity of the tower body 101 into a spiral gas channel 105. An air inlet (i.e., the air inlet end of the spray tower 1) is provided at the bottom of the gas channel 105. Baffles 103 are spaced apart on the guide plate 102. Water curtain forming holes 108 corresponding to the baffles 103 are provided on the guide plate 102. A spray pipe 109 is provided above the guide plate 102. The spray pipe 109 is connected to the outlet end of a circulating pump 1010 via a pipe. The inlet end of the circulating pump 1010 is connected to the water storage tank 107. The water storage tank 107 contains alkaline solution.

[0038] When the circulating pump 1010 is working, it draws alkaline solution from the storage tank 107 and introduces it into the spray pipe 109. The solution is then sprayed downwards through the spray pipe 109, forming the uppermost water curtain. The alkaline solution sprayed from the spray pipe 109 falls onto the guide plate 102 and flows downwards along the guide plate 102. When it reaches the baffle 103, it is blocked by the baffle 103 and flows downwards through the water curtain forming hole 108 on the side of the baffle 103, forming the next layer of water curtain. In this way, by setting multiple baffles 103 and water curtain forming holes 108, multiple water curtains can be formed in the gas channel 105. During operation, the exhaust gas to be treated is introduced from the bottom of the gas channel 105 and then spirals upwards along the gas channel 105. During the upward process, it passes through multiple water curtains, so that the acidic substances in the exhaust gas come into full contact with the alkaline solution and are neutralized and absorbed, thereby achieving the purpose of removing acidic substances from the exhaust gas.

[0039] The spray pipe 109 is provided with baffles 104 evenly spaced above it, thereby forming a spray water recovery channel 1011 between two adjacent baffles 104; a cooling channel 106 is constructed inside the baffle 104, the upper end of the cooling channel 106 is the water inlet end (i.e. the liquid inlet end of the spray tower 1), and the lower end of the cooling channel 106 is the water outlet end (i.e. the liquid outlet end of the spray tower 1); the top of the tower body 101 is provided with an air outlet (i.e., the air outlet end of the spray tower 1).

[0040] During operation, the exhaust gas continues to flow upward after passing through the gas channel 105, and then passes through the spray water recovery channel 1011 and the gas outlet in sequence before being discharged outward. When passing through the spray water recovery channel 1011, the temperature of the exhaust gas is low because cold water flows in the cooling channel 106 inside the baffle plate 104. This causes the water in the exhaust gas passing through the spray water recovery channel 1011 to condense and flow back downward into the water storage tank 107, reducing the loss of water in the alkaline solution in the spray tower 1 and reducing the water content in the discharged exhaust gas.

[0041] In this embodiment, as Figure 4 As shown, the whitening device 3 includes a housing 301, a cyclone cone 302, and a condenser plate 303. The housing 301 contains the cyclone cone 302 and the condenser plate 303 arranged sequentially from bottom to top. The bottom of the cyclone cone 302 is provided with an air inlet pipe 307 (i.e., the air inlet end of the whitening device 3) and a drain pipe 308, with the air inlet pipe 307 tangent to the cyclone cone 302. The drain pipe 308 is connected to the hot water tank 6. The condenser plates 303 are evenly spaced, and each condenser plate 303 has a condensation chamber 309. The upper end of the condensation chamber 309 is the water inlet end (i.e., the liquid inlet end of the whitening device 3), and the lower end is the water outlet end (i.e., the liquid outlet end of the whitening device 3). The top of the housing 301 is provided with an air outlet (i.e., the air outlet end of the whitening device 3).

[0042] During operation, the water-containing exhaust gas is introduced through the inlet pipe 307 and forms a rotating cyclone in the cyclone cone 302. This centrifugal force throws the water in the exhaust gas onto the inner wall of the cyclone cone 302, thus separating the water in the exhaust gas. The gas then gradually flows downwards and eventually returns to the hot water pool 6 through the drain pipe 308. After passing through the cyclone cone 302, the exhaust gas continues to flow upwards and flows out of the outlet after passing through the condenser plate 303. When passing through the condenser plate 303, the water in the exhaust gas condenses due to the low temperature caused by the cold water flowing inside the condenser plate 303, further removing the water from the exhaust gas and further preventing the generation of white smoke.

[0043] In this embodiment, the condenser plate 303 is corrugated, which effectively increases the contact area between the exhaust gas and the condenser plate 303. At the same time, when the exhaust gas impacts the condenser plate 303, some condensation will also occur, thereby improving the ability to remove moisture.

[0044] In this embodiment, a stirring shaft 304 is rotatably installed inside the cyclone cone 302. The stirring shaft 304 is connected to a stirring motor 305, and stirring blades 306 are provided on the stirring shaft 304. During operation, the stirring motor 305 is energized and rotates, thereby driving the stirring blades 306 to rotate through the stirring shaft 304, so as to increase the rotation speed of the airflow in the cyclone cone 302, making it easier to separate the moisture in the exhaust gas, and further improving the ability to remove moisture from the exhaust gas.

[0045] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A copper electrolyte evaporation tail gas whitening system, characterized in that: Includes a spray tower (1), an induced draft fan (2), a whitening device (3), a cold water circulation pump (4), a cold water tank (5), a hot water tank (6), and a hot water circulation pump (7). The air inlet of the spray tower (1) is connected to the evaporation tail gas discharge pipe through a pipe, the air outlet of the spray tower (1) is connected to the air inlet of the induced draft fan (2) through a pipe, the air outlet of the induced draft fan (2) is connected to the air inlet of the whitening device (3) through a pipe, and the air outlet of the whitening device (3) is connected to the chimney through a pipe. The inlet of the cold water circulation pump (4) is connected to the cold water tank (5) through a pipe. The outlet of the cold water circulation pump (4) is connected to the inlet of the spray tower (1) and the inlet of the whitening device (3) through pipes respectively. The outlet of the spray tower (1) and the outlet of the whitening device (3) are connected to the hot water tank (6) through pipes respectively. The inlet of the hot water circulation pump (7) is connected to the hot water tank (6) through a pipe, the outlet of the hot water circulation pump (7) is connected to the inlet of the cooling tower (8) through a pipe, and the outlet of the cooling tower (8) is connected to the cold water tank (5) through a pipe.

2. The copper electrolyte evaporation tail gas whitening system according to claim 1, characterized in that: The spray tower (1) includes a tower body (101), a guide plate (102), a baffle (103), and a baffle plate (104). The bottom of the tower body (101) is provided with a water storage tank (107), and a spiral guide plate (102) is provided above the water storage tank (107). The guide plate (102) divides the internal cavity of the tower body (101) into a spiral gas channel (105). An air inlet is provided at the bottom of the gas channel (105). Baffles (103) are provided at intervals on the guide plate (102). Water curtain forming holes (108) corresponding to the baffles (103) are provided on the guide plate (102). A spray pipe (109) is provided above the guide plate (102). The spray pipe (109) is connected to the outlet of the circulating pump (1010) through a pipe. The inlet of the circulating pump (1010) is connected to the water storage tank (107). The spray pipe (109) is provided with baffles (104) at even intervals above it, thereby forming a spray water recovery channel (1011) between two adjacent baffles (104); a cooling channel (106) is constructed inside the baffle (104), the upper end of the cooling channel (106) is the water inlet end, and the lower end of the cooling channel (106) is the water outlet end; The top of the tower body (101) is provided with an air outlet.

3. The copper electrolyte evaporation tail gas whitening system according to claim 1, characterized in that: The whitening device (3) includes a shell (301), a cyclone cone (302), and a condenser plate (303); The outer shell (301) is provided with a cyclone cone (302) and a condenser plate (303) from bottom to top. The bottom of the cyclone cone (302) is provided with an air inlet pipe (307) and a drain pipe (308). The air inlet pipe (307) is tangent to the cyclone cone (302). The drain pipe (308) is connected to the hot water tank (6). The condenser plates (303) are evenly spaced, and the internal structure of the condenser plates (303) includes a condenser cavity (309). The upper end of the condenser cavity (309) is the water inlet, and the lower end is the water outlet. The top of the outer casing (301) is provided with an air outlet.

4. The copper electrolyte evaporation tail gas whitening system according to claim 3, characterized in that: The condenser plate (303) is corrugated.

5. The copper electrolyte evaporation tail gas whitening system according to claim 3, characterized in that: A stirring shaft (304) is rotatably installed inside the cyclone cone (302). The stirring shaft (304) is connected to a stirring motor (305), and stirring blades (306) are provided on the stirring shaft (304).

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