CN215196135U

CN215196135U - Dust collecting and desulfurizing device for zinc smelting tail gas of electric furnace

Info

Publication number: CN215196135U
Application number: CN202121365735.6U
Authority: CN
Inventors: 葛广付; 郭安明; 李继爽
Original assignee: Xuanwei Hongshu Metal Technology Co ltd
Current assignee: Xuanwei Hongshu Metal Technology Co ltd
Priority date: 2021-06-20
Filing date: 2021-06-20
Publication date: 2021-12-17
Anticipated expiration: 2031-06-20

Abstract

The utility model discloses an electric stove zinc refining tail gas's desulphurization unit that gathers dust, including dry dust collector, wet dust collector and desulfurizer, dry dust collector includes first casing and bottom plate, the upper portion tangential of first casing is provided with the intake pipe, the middle part of bottom plate is provided with the open second casing in upper end, the inside of second casing is provided with polylith dust removal plate electrode, wet dust collector includes third casing and water main, upper portion in the third casing is provided with vertical axis and flabellum, the upper portion fixedly connected with round half pipe of third casing outer wall, upper portion in the third casing is provided with the ring canal, the bottom circumference equipartition of ring canal has a plurality of first shower nozzles, the desulfurizer includes the fourth casing and sets up the clamp cover on fourth casing outer wall, be provided with the standpipe on the vertical axis in the fourth casing, the equipartition has a plurality of second shower nozzles on the standpipe. The utility model discloses it is effectual to gather dust, and the desulfurization ability is strong, can reduce environmental pollution, has apparent economic value and social value.

Description

Dust collecting and desulfurizing device for zinc smelting tail gas of electric furnace

Technical Field

The utility model relates to a zinc metallurgy equipment technical field, concretely relates to electric furnace zinc metallurgy tail gas's desulphurization unit that gathers dust.

Background

The electric furnace zinc smelting is to directly heat the furnace charge by taking electric energy as a heat source in the presence of reducing agents such as coke or coal and the like so that zinc oxide in the furnace charge is continuously reduced into zinc vapor and condensed into metallic zinc. Because zinc powder particles formed by condensing zinc vapor are small, a condenser cannot completely collect zinc powder, if tail gas is directly discharged, waste is caused, the yield of the zinc powder is influenced, and the zinc powder particles in the tail gas easily cause environmental pollution, the dust collecting effect of the conventional dust collector in the production process of the zinc powder is poor, the main reason is that dust is easily adsorbed on a dust collecting cloth bag in the dust collector, when the dust is adsorbed to a certain degree, the dust absorbing capacity of the dust collecting cloth bag is greatly reduced, so that the zinc powder dust in the tail gas cannot be completely absorbed, in order to solve the problem, a frequently-adopted means is to stop the machine to clean the dust collecting cloth bag, but the maintenance cost is high; secondly, in the process of smelting zinc in an electric furnace, sulfur in the raw materials is easily oxidized at high temperature, the generated oxide gas is discharged along with tail gas, and atmospheric pollution can be caused due to imperfect separation measures for the tail gas, so that the problem of standard treatment of the tail gas in the process of smelting zinc in the electric furnace is increasingly important along with the increase of environmental protection supervision. Therefore, the development of the dust collecting and desulfurizing device for the electric furnace zinc smelting tail gas, which has good dust collecting effect and strong desulfurizing capacity and can reduce environmental pollution, is objectively needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric stove zinc refining tail gas's desulphurization unit that gathers dust is effectual, and the desulfurization ability is strong, can reduce environmental pollution.

The utility model aims at realizing the same, including dry dust collector, wet dust collector and desulfurizer, dry dust collector includes that first casing and slope set up the bottom plate in first casing bottom, the upper portion tangential of first casing is provided with the intake pipe, lower end at the bottom plate is provided with first dust exhaust pipe, the middle part of bottom plate is provided with the open second casing in upper end, the inside of first casing is stretched into to the upper end of second casing, the bottom of second casing is provided with the second dust exhaust pipe, the inside of second casing is provided with polylith dust removal plate electrode, be provided with first gas-supply pipe on the second casing lateral wall of dust removal plate electrode below.

The wet dust collector comprises a third shell and a water delivery main pipe located above the third shell, the end of a first gas delivery pipe is communicated with the lower portion of the third shell, the upper portion in the third shell is provided with a vertical shaft, the vertical shaft is provided with fan blades, the upper end of the vertical shaft penetrates through the top of the third shell and then is connected with a driving device in a transmission mode, the upper portion of the outer wall of the third shell is fixedly connected with a circle of half pipe, a plurality of water outlet holes are evenly distributed in the third shell side wall in the half pipe in a circumferential mode, the upper portion in the third shell is provided with an annular pipe, a plurality of first spray heads are evenly distributed in the bottom of the annular pipe in a circumferential mode, the half pipe and the annular pipe are communicated with the water delivery main pipe through a water delivery branch pipe respectively, and the top of the third shell is provided with a second gas delivery pipe.

The desulfurizer comprises a fourth shell and a jacket arranged on the outer wall of the fourth shell, the jacket is positioned in the middle of the fourth shell, the end part of the second gas pipe is communicated with the jacket, a plurality of gas distribution holes are uniformly distributed on the fourth shell in the jacket in a circumferential manner, a vertical pipe is arranged on a vertical line in the fourth shell, a plurality of second spray heads are uniformly distributed on the vertical pipe, the upper end of the vertical pipe extends out of the upper part of the fourth shell, and a third gas pipe is arranged at the top of the fourth shell.

Furthermore, a screw conveyer is arranged below the dry dust collector, and the lower ends of the first dust exhaust pipe and the second dust exhaust pipe are communicated with a cylinder of the screw conveyer.

Furthermore, the third shell is of a cylindrical structure, the vertical shaft is connected with a scraper through a connecting rod, and the outer side face of the scraper is tightly attached to the side wall of the third shell.

Further, a gas detector, a return pipe and a valve are sequentially arranged on the third gas pipe along the gas flow direction, a one-way valve is arranged on the return pipe, and the end part of the return pipe is communicated with the jacket.

Furthermore, a dehumidifier and an activated carbon layer are sequentially arranged in the fourth shell above the second spray head from bottom to top.

Furthermore, the top of the first shell is provided with an outlet pipe, the side wall of the first shell is provided with an inlet pipe, the first shell is internally provided with a spiral coil pipe, the lower end of the outlet pipe extends into the first shell and then is communicated with the upper port of the spiral coil pipe, and the end of the inlet pipe extends into the first shell and then is communicated with the lower port of the spiral coil pipe.

When the utility model is operated, the zinc smelting tail gas of the electric furnace enters the first shell from the air inlet pipe in a tangential direction, cyclone is formed in the first shell, zinc powder in the tail gas is thrown away under the action of centrifugal force, slides downwards along the inner wall of the first shell and is discharged from the first dust exhaust pipe, the tail gas enters the second shell, the zinc powder in the tail gas is further separated under the action of the dust removal electrode plate, falls down after accumulating to a certain degree and is discharged from the second dust exhaust pipe, the tail gas after dry dust removal is sent into the wet dust remover from the first air pipe, before the tail gas enters the wet dust remover, water is respectively sent to the ring pipe and the half pipe through the main water pipe, the water in the ring pipe is sprayed out from the first spray nozzle to form water mist, the water mist is dispersed in the third shell, meanwhile, the water in the half pipe flows out from the water outlet hole, a flowing water film is formed on the inner wall of the third shell, the tail gas continuously rises after entering the third shell, meanwhile, the fan blades are driven by the vertical shaft to rotate, when the fan blades rotate, on one hand, tail gas can be pushed to rotate to form rotational flow, the contact probability of zinc powder and water mist in the tail gas is improved, the dust collecting effect is improved, on the other hand, the zinc powder in the tail gas can be impacted, the zinc powder can move around, when encountering a water film, the zinc powder is adhered to the water film and flows downwards to be discharged, finally, the tail gas enters the desulfurizer, and is sprayed out to the center of the fourth shell from the gas distribution hole after being jacketed, meanwhile, the desulfurization liquid is sprayed out from the second sprayer, sulfur in the tail gas is removed after mutual collision, and the tail gas is finally discharged from the third gas pipe. To sum up, the utility model discloses in the mode that has adopted cyclone and electric precipitation carries out dry dust removal to tail gas, still use the mode that sprays to carry out wet dedusting simultaneously, both combine, the effect of gathering dust is better, simultaneously, when the desulfurization, doctor solution and tail gas have adopted the mode of reverse convection current, and doctor solution's water smoke and tail gas contact are comparatively abundant, and the desulfurization ability is stronger. The utility model discloses it is effectual to gather dust, and the desulfurization ability is strong, can reduce environmental pollution, has apparent economic value and social value.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

in the figure: 1-a first shell, 2-a bottom plate, 3-an air inlet pipe, 4-a first dust exhaust pipe, 5-a second shell, 6-a second dust exhaust pipe, 7-a dust removal electrode plate, 8-a first air delivery pipe, 9-a third shell, 10-a water delivery main pipe, 11-a vertical shaft, 12-a fan blade, 13-a half pipe, 14-a water outlet hole, 15-a ring pipe, 16-a first spray head, 17-a water delivery branch pipe, 18-a second air delivery pipe, 19-a fourth shell, 20-a jacket, 21-an air distribution hole, 22-a vertical pipe, 23-a third air delivery pipe, 24-a spiral conveyor, 25-a connecting rod, 26-a scraper, 27-a gas detector, 28-a return pipe, 29-a valve, 30-a one-way valve and 31-a dehumidifier, 32-activated carbon layer, 33-outlet pipe, 34-inlet pipe, 35-spiral coil pipe, 36-second spray head.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.

As shown in fig. 1, the utility model discloses a dry type dust remover, wet dust remover and desulfurizer, dry type dust remover includes that first casing 1 and slope set up the bottom plate 2 in first casing 1 bottom, the upper portion tangential of first casing 1 is provided with intake pipe 3, lower end at bottom plate 2 is provided with first dust exhaust pipe 4, the middle part of bottom plate 2 is provided with the open second casing 5 in upper end, the inside of first casing 1 is stretched into to the upper end of second casing 5, the bottom of second casing 5 is provided with second dust exhaust pipe 6, the inside of second casing 5 is provided with polylith dust removal electrode board 7, dust removal electrode board 7 is current structure, impurity such as zinc powder in the circular telegram adsorption tail gas during operation, be provided with first gas-supply pipe 8 on the 5 lateral walls of second casing below dust removal electrode board 7.

The wet dust collector comprises a third shell 9 and a water delivery main pipe 10 located above the third shell 9, the end of a first gas delivery pipe 8 is communicated with the lower portion of the third shell 9, the upper portion in the third shell 9 is provided with a vertical shaft 11, fan blades 12 are arranged on the vertical shaft 11, the upper end of the vertical shaft 11 penetrates through the top of the third shell 9 and then is connected with a driving device in a transmission mode, the driving device is an existing device and can be used by combining a motor and a speed reducer, the upper portion of the outer wall of the third shell 9 is fixedly connected with a circle of half pipe 13, a plurality of water outlet holes 14 are evenly distributed on the side wall of the third shell 9 in the half pipe 13 in a circumferential mode, the upper portion in the third shell 9 is provided with a ring pipe 15, the bottom of the ring pipe 15 is evenly distributed with a plurality of first spray nozzles 16, the half pipe 13 and the ring pipe 15 are respectively communicated with the water delivery main pipe 10 through a water delivery branch pipe 17, and the top of the third shell 9 is provided with a second gas delivery pipe 18.

The desulfurizer comprises a fourth shell 19 and a jacket 20 arranged on the outer wall of the fourth shell 19, the jacket 20 is positioned in the middle of the fourth shell 19, the end part of the second gas pipe 18 is communicated with the jacket 20, a plurality of gas distribution holes 21 are uniformly distributed on the circumference of the fourth shell 19 in the jacket 20, a vertical pipe 22 is arranged on the vertical line in the fourth shell 19, a plurality of second spray nozzles 36 are uniformly distributed on the vertical pipe 22, the upper end of the vertical pipe 22 extends out of the upper part of the fourth shell 19, and a third gas pipe 23 is arranged at the top of the fourth shell 19.

When the utility model is operated, the zinc smelting tail gas of the electric furnace enters the first shell 1 from the air inlet pipe 3 in a tangential direction, and forms cyclone in the first shell 1, the zinc powder in the tail gas is thrown out under the action of centrifugal force, slides downwards along the inner wall of the first shell 1, and is discharged from the first dust exhaust pipe 4, the tail gas enters the second shell 5, the zinc powder in the tail gas is further separated under the action of the dedusting electrode plate 7, falls down after accumulating to a certain degree and is discharged from the second dust exhaust pipe 6, the tail gas after dry dedusting is sent into the wet dust collector from the first air pipe 8, before the tail gas enters the wet dust collector, water is respectively sent to the ring pipe 15 and the half pipe 13 through the water main pipe 10, the water in the ring pipe 15 is sprayed from the first spray nozzle 16 to form water mist, the water mist is dispersed in the third shell 9, meanwhile, the water in the half pipe 13 flows out from the water outlet hole 14, a flowing water film is formed on the inner wall of the third shell 9, when tail gas enters the third shell 9 and then rises continuously, meanwhile, the fan blades 12 are driven by the vertical shaft 11 to rotate, when the fan blades 12 rotate, on one hand, the tail gas can be pushed to rotate to form rotational flow, the contact probability of zinc powder and water mist in the tail gas is improved, the dust collection effect is improved, on the other hand, the zinc powder in the tail gas can be impacted, the zinc powder moves around, when encountering the water film, the zinc powder is adhered to the water film and flows downwards to be discharged, finally, the tail gas enters the desulfurizer, the tail gas is sprayed out from the air distribution hole 21 to the center of the fourth shell 19 after passing through the jacket 20, simultaneously, the desulfurization liquid is sprayed out from the second spray head 36, the sulfur in the tail gas is removed after the desulfurization liquid water mist and the tail gas collide with each other, and the tail gas is finally discharged from the third gas conveying pipe 23. To sum up, the utility model discloses in the mode that has adopted cyclone and electric precipitation carries out dry dust removal to tail gas, still use the mode that sprays to carry out wet dedusting simultaneously, both combine, the effect of gathering dust is better, simultaneously, when the desulfurization, doctor solution and tail gas have adopted the mode of reverse convection current, and doctor solution's water smoke and tail gas contact are comparatively abundant, and the desulfurization ability is stronger, and all in all, this device has better desulfurization effect of gathering dust, can reduce the pollution of exhaust emissions to the environment.

In order to facilitate collection and transportation of the separated zinc powder, a screw conveyor 24 is arranged below the dry dust collector, the lower ends of the first dust exhaust pipe 4 and the second dust exhaust pipe 6 are communicated with a barrel of the screw conveyor 24, the screw conveyor 24 is an existing conveyor, when the dry dust collector is used, the zinc powder separated from the dry dust collector falls into the screw conveyor 24 through the first dust exhaust pipe 4 and the second dust exhaust pipe 6 respectively, and the screw conveyor 24 can convey the zinc powder to a specified position in time.

The third casing 9 is of a cylindrical structure, the vertical shaft 11 is connected with a scraper 26 through a connecting rod 25, the outer side surface of the scraper 26 is tightly attached to the side wall of the third casing 9, when in operation, zinc powder is mixed into water and flows downwards along the inner wall of the third casing 9, in the process, part of the zinc powder possibly remains and adheres to the inner wall of the third casing 9, and the scraper 26 can rotate along with the vertical shaft 11 and scrapes the zinc powder on the inner wall of the third casing 9 during rotation.

The third air delivery pipe 23 is sequentially provided with a gas detector 27, a return pipe 28 and a valve 29 along the airflow direction, the return pipe 28 is provided with a one-way valve 30, the end part of the return pipe 28 is communicated with the jacket 20, the gas detector 27 is an existing instrument and can detect the sulfur content in the tail gas, when the sulfur content meets the emission standard, the one-way valve 30 is closed, the valve 29 is opened, and the tail gas is discharged from the third air delivery pipe 23; on the contrary, when the sulfur content exceeds the standard and does not meet the emission standard, the valve 29 is closed, the check valve 30 is opened, the tail gas returns to the fourth shell 19 through the return pipe 28, and the desulfurization treatment is performed again until the sulfur content in the tail gas meets the emission standard, wherein the check valve 30 can ensure the one-way flow of the tail gas and only allows the tail gas to flow from the third gas pipe 23 to the jacket 20.

The dehumidifier 31 and the activated carbon layer 32 are sequentially arranged in the fourth shell 19 above the second spray head 36 from bottom to top, the dehumidifier 31 is of an existing structure and used for removing moisture in the tail gas, and the activated carbon layer 32 can remove peculiar smell and other impurities in the tail gas, so that the pollution to the atmosphere after the tail gas is discharged is further reduced.

The top of first casing 1 is provided with outlet pipe 33, be provided with import pipe 34 on the lateral wall of first casing 1, be provided with spiral coil 35 in the first casing 1, the lower extreme of outlet pipe 33 stretches into first casing 1 in back and spiral coil 35's last port intercommunication, the tip of import pipe 34 stretches into first casing 1 in back and spiral coil 35's lower port intercommunication, when operation, can let in coolant to spiral coil 35 in, coolant can be cooling water, air conditioning etc., coolant can absorb the heat in the tail gas when flowing in spiral coil 35, reduce the tail gas temperature on the one hand, be convenient for subsequent processing procedure, on the other hand can absorb the heat in the tail gas, the recycle ratio of energy is improved, the waste of energy is reduced.

Claims

1. The utility model provides a dust arrester desulfurization device of electric furnace zinc-smelting tail gas which characterized in that: the dust remover comprises a dry dust remover, a wet dust remover and a desulfurizer, wherein the dry dust remover comprises a first shell (1) and a bottom plate (2) obliquely arranged at the bottom of the first shell (1), an air inlet pipe (3) is tangentially arranged at the upper part of the first shell (1), a first dust exhaust pipe (4) is arranged at the lower end of the bottom plate (2), a second shell (5) with an open upper end is arranged at the middle part of the bottom plate (2), the upper end of the second shell (5) extends into the first shell (1), a second dust exhaust pipe (6) is arranged at the bottom of the second shell (5), a plurality of dust removal electrode plates (7) are arranged in the second shell (5), and a first air conveying pipe (8) is arranged on the side wall of the second shell (5) below the dust removal electrode plates (7);

the wet dust collector comprises a third shell (9) and a water delivery main pipe (10) positioned above the third shell (9), the end part of the first gas delivery pipe (8) is communicated with the lower part of the third shell (9), a vertical shaft (11) is arranged at the upper part in the third shell (9), fan blades (12) are arranged on the vertical shaft (11), the upper end of the vertical shaft (11) penetrates through the top part of the third shell (9) and is connected with a driving device in a transmission way, a circle of half pipe (13) is fixedly connected with the upper part of the outer wall of the third shell (9), a plurality of water outlet holes (14) are uniformly distributed on the side wall of the third shell (9) in the half pipe (13) along the circumference, an annular pipe (15) is arranged at the upper part in the third shell (9), a plurality of first spray nozzles (16) are uniformly distributed on the circumference of the bottom of the annular pipe (15), and the half pipe (13) and the annular pipe (15) are respectively communicated with the water delivery main pipe (10) through a water delivery branch pipe (17), a second air conveying pipe (18) is arranged at the top of the third shell (9);

the desulfurizer comprises a fourth shell (19) and a jacket (20) arranged on the outer wall of the fourth shell (19), wherein the jacket (20) is positioned in the middle of the fourth shell (19), the end part of the second gas pipe (18) is communicated with the jacket (20), a plurality of gas distribution holes (21) are uniformly distributed on the circumference of the fourth shell (19) in the jacket (20), a vertical pipe (22) is arranged on the vertical line in the fourth shell (19), a plurality of second spray nozzles (36) are uniformly distributed on the vertical pipe (22), the upper end of the vertical pipe (22) extends out of the upper part of the fourth shell (19), and a third gas pipe (23) is arranged at the top of the fourth shell (19).

2. The dust collecting and desulfurizing device for the electric furnace zinc smelting tail gas according to claim 1, characterized in that a screw conveyer (24) is arranged below the dry dust collector, and the lower ends of the first dust exhaust pipe (4) and the second dust exhaust pipe (6) are communicated with a cylinder of the screw conveyer (24).

3. The dust collection and desulfurization device for the electric furnace zinc smelting tail gas according to the claim 1 is characterized in that the third shell (9) is of a cylindrical structure, the vertical shaft (11) is connected with a scraper (26) through a connecting rod (25), and the outer side surface of the scraper (26) is tightly attached to the side wall of the third shell (9).

4. The dust collecting and desulfurizing device for the zinc smelting tail gas of the electric furnace according to claim 1, characterized in that a gas detector (27), a return pipe (28) and a valve (29) are sequentially arranged on the third gas pipe (23) along the gas flow direction, a check valve (30) is arranged on the return pipe (28), and the end part of the return pipe (28) is communicated with the jacket (20).

5. The dust collecting and desulfurizing device for the zinc smelting tail gas of the electric furnace according to claim 1, characterized in that a dehumidifier (31) and an activated carbon layer (32) are sequentially arranged in the fourth shell (19) above the second spray head (36) from bottom to top.

6. The dust collection and desulfurization device for the electric furnace zinc smelting tail gas according to claim 1, characterized in that an outlet pipe (33) is arranged at the top of the first shell (1), an inlet pipe (34) is arranged on the side wall of the first shell (1), a spiral coil (35) is arranged in the first shell (1), the lower end of the outlet pipe (33) is communicated with the upper port of the spiral coil (35) after extending into the first shell (1), and the end part of the inlet pipe (34) is communicated with the lower port of the spiral coil (35) after extending into the first shell (1).