CN219050762U

CN219050762U - Equipment for purifying smelting flue gas and removing arsenic by wet method

Info

Publication number: CN219050762U
Application number: CN202222977411.9U
Authority: CN
Inventors: 陈晓宇; 颜士娟
Original assignee: Zhejiang Nanhua Anticorrosion Equipments Co ltd
Current assignee: Zhejiang Nanhua Anticorrosion Equipments Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-05-23
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses equipment for purifying smelting flue gas and removing arsenic by a wet method, which comprises a reverse spray tower, wherein a spray mechanism is arranged in the reverse spray tower, one side of the reverse spray tower is provided with a flue gas inlet, and the flue gas inlet is connected with a reverse spray pipe. The utility model adopts reverse spray washing as a novel flue gas purification technology, can simultaneously complete the functions of flue gas quenching, acid gas removal, solid dust removal and the like, and forms a foam area in the reverse spray pipe, thereby increasing the contact between flue gas and circulating liquid, being more beneficial to the absorption and washing of the flue gas, improving the working efficiency, avoiding the frequent blockage of purification equipment in the treatment process, leading the device to not run for a long period, simultaneously leading a large amount of arsenic to be brought into purified sewage, increasing the difficulty of sewage treatment and leading manufacturers to face the problem of huge environmental protection pressure.

Description

Equipment for purifying smelting flue gas and removing arsenic by wet method

Technical Field

The utility model relates to the technical field of flue gas arsenic removal and purification, in particular to equipment for purifying smelting flue gas by a wet method.

Background

Sulfuric acid is the most active binary inorganic strong acid and can react with most metals. The high-concentration sulfuric acid has strong water absorption and can be used as a dehydrating agent for carbonizing substances containing carbohydrate, such as wood, paper, cotton and hemp fabrics, biological skin and meat, and the like. The Chinese patent discloses a device (publication No. CN 206198735U) for removing arsenic by flash evaporation of water in smelting arsenic-containing flue gas, which is suitable for reducing sewage treatment cost without precipitating agents such as sodium sulfide, lime and the like and improving economic benefits of enterprises, and comprises an electric dust collector, a flash evaporation tower, a pulse bag dust collector, a water pump, a valve, an atomizer, a discharge frame, a temperature monitor, a singlechip and a flowmeter; the flue gas inlet is arranged at the lower part of the electric dust collector, the electric dust collector comprises two electric fields and two insulator chambers, and the insulator chamber at the upper part of the electric dust collector is provided with a flue gas outlet and is connected with the flash tower. However, the purification equipment is often blocked in the treatment process, so that the device cannot run for a long period, and a large amount of arsenic is brought into purified sewage, so that the difficulty of sewage treatment is increased, and a production enterprise faces huge environmental protection pressure.

Disclosure of Invention

The utility model aims to overcome the defects that the purification equipment is often blocked in the existing flue gas treatment process, so that the device cannot run for a long period, and a large amount of arsenic is brought into purified sewage, so that the difficulty of sewage treatment is increased, and the production enterprises face huge environmental protection pressure.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a device for purifying smelting flue gas wet process removes arsenic, includes reverse spray column, reverse spray column in install spray mechanism, reverse spray column one side be equipped with the flue gas import, the flue gas import on be connected with reverse shower, reverse spray column one end be connected with the sedimentation tank, sedimentation tank one side be connected with plate and frame filter press, plate and frame filter press on be connected with the electric defroster, the electric defroster on be connected with high voltage power source.

Preferably, the spraying mechanism comprises a circulating inlet arranged at the top of the reverse spraying pipe, the electric demister is connected with the circulating inlet, 1-4 layers of spraying plates are arranged in the reverse spraying pipe, and a collecting box is arranged at the bottom in the reverse spraying pipe and used for collecting mixed liquid.

Preferably, a discharging pipe is arranged at one side of the bottom of the reverse spraying tower, the reverse spraying tower is connected with the sedimentation tank through the discharging pipe, and a circulating pump is arranged between the discharging pipe and the sedimentation tank and used for conveying collected liquid into the sedimentation tank.

Preferably, the plate-and-frame filter press on be equipped with the guard frame, guard frame one side install the hydro-cylinder, the guard frame in install the arm-tie pole, arm-tie pole one end pass the guard frame and connect in the hydro-cylinder, the arm-tie pole be located the one end in the guard frame and be connected with the filter plate, filter plate bottom be equipped with the recovery pond for press the processing with arsenic mud, carry out recovery use.

Preferably, the reverse spray pipe is provided with a two-fluid nozzle for conveying the smelting flue gas to be treated into the equipment through a stainless steel flue, and the process water is atomized by compressed air through the two-fluid nozzle so as to accelerate the evaporation and cooling of the smelting flue gas.

Compared with the prior art, the utility model has the beneficial effects that:

1. the reverse spray washing is used as a novel flue gas purification technology, and can simultaneously finish the functions of quenching flue gas, removing acid gas, removing solid dust and the like;

2. the reverse spray washing technology adopts a reverse spray mode, and forms a foam area in the reverse spray pipe, so that the contact between the flue gas and circulating liquid is increased, and the absorption and washing of the flue gas are facilitated;

in summary, the utility model adopts the reverse spray washing as a novel flue gas purification technology, can simultaneously complete the functions of flue gas quenching, acid gas removal, solid dust removal and the like, and forms a foam area inside the reverse spray pipe, thereby increasing the contact between the flue gas and circulating liquid, being more beneficial to the absorption and washing of the flue gas, improving the working efficiency, avoiding the frequent blockage of purification equipment in the treatment process, leading the device to not run for a long period, simultaneously leading a large amount of arsenic to be brought into purified sewage, increasing the difficulty of sewage treatment, and leading the production enterprises to face the problem of huge environmental protection pressure.

Drawings

FIG. 1 is a block diagram of a wet arsenic removal device for purifying smelting flue gas according to the present utility model;

FIG. 2 is a diagram showing the internal structure of a reverse spray tower of the device for purifying smelting flue gas by wet arsenic removal;

fig. 3 is a block diagram of a plate-and-frame filter press of the device for purifying smelting flue gas by wet arsenic removal.

In the figure: 1. a two-fluid nozzle; 2. a reverse shower pipe; 3. a reverse spray tower; 4. a circulation pump; 5. a sedimentation tank; 6. a plate and frame filter press; 7. a flue gas stream; 8. an electric defogger; 9. a high voltage power supply; 10. purifying the flue gas; 11. a circulation inlet; 12. a spray plate; 13. a flue gas inlet; 14. a collection box; 15. a protective frame; 16. an oil cylinder; 17. a pulling plate rod; 18. a filter plate; 19. and (5) a recovery pool.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, a device for purifying smelting flue gas wet arsenic removal comprises a reverse spray tower 3, wherein a spray mechanism is installed in the reverse spray tower 3 and comprises a circulating inlet 11 arranged at the top of a reverse spray pipe 2 for connecting an electric demister 8, purifying unpurified flue gas again, a double-fluid nozzle 1 is arranged on the reverse spray pipe 2, process water is atomized by using compressed air through the double-fluid nozzle 1, evaporation and cooling of smelting flue gas are accelerated, and the electric demister 8 is connected with the circulating inlet 11, so that the flue gas can be thoroughly purified for use.

In the utility model, 1-4 layers of spray plates 12 are arranged in a reverse spray pipe 2, matched water outlets are arranged on the spray plates 12, spraying processing of flue gas is carried out, a collecting box 14 is arranged in the bottom of the reverse spray pipe 2, a flue gas inlet 13 is arranged on one side of a reverse spray tower 3, the reverse spray pipe 2 is connected to the flue gas inlet 13, one end of the reverse spray tower 3 is connected with a sedimentation tank 5, a discharging pipe is arranged on one side of the bottom of the reverse spray tower 3, the reverse spray tower 3 is connected with the sedimentation tank 5 through the discharging pipe, a circulating pump 4 is arranged between the discharging pipe and the sedimentation tank 5, and process water is atomized by using compressed air through a double-fluid nozzle 1, so that evaporation and cooling of smelting flue gas are accelerated.

In the utility model, one side of a sedimentation tank 5 is connected with a plate-and-frame filter press 6, a protection frame 15 is arranged on the plate-and-frame filter press 6, one side is provided with an oil cylinder 16, a pull plate rod 17 is arranged in the protection frame 15, one end of the pull plate rod 17 penetrates through the protection frame 15 and is connected in the oil cylinder 16, one end of the pull plate rod 17 positioned in the protection frame 15 is connected with a filter plate 18, the bottom of the filter plate 18 is provided with a recovery tank 19, the oil cylinder 16 drives the pull plate rod 17 to filter-press raw materials fed into the protection frame 15, and filtered clear liquid returns to a matched filter-pressing clear liquid tank for recycling through a clear liquid pump.

In the utility model, an electric demister 8 is connected to a plate-and-frame filter press 6, a transmission pipe is arranged between the plate-and-frame filter press 6 and the electric demister 8, a flue gas flow 7 is arranged in the transmission pipe, the top of the electric demister 8 is connected with a fan, a discharge port is arranged on the fan, a purified flue gas 10 is arranged in the discharge port, and a high-voltage power supply 9 is connected to the electric demister 8 to provide a power supply for the electric demister 8 during operation.

When the device for purifying smelting flue gas and removing arsenic by wet method is used, the smelting flue gas to be treated is sent into the device through a stainless steel flue, process water is atomized by utilizing compressed air through a two-fluid nozzle 1, evaporation and cooling of the smelting flue gas are accelerated, cooled flue gas is sent into a reverse spray tower 3 through a circulating inlet 11 connected with a reverse spray pipe 2, the flue gas is washed by a spray plate 12 in the reverse spray tower 3 in a reverse spray manner and then is sent into a sedimentation tank 5 through a circulating pump 4, arsenic mud generated after sedimentation is pumped into a plate-and-frame filter press 6 for filter pressing by slag slurry, clear liquid after filter pressing is sent into a filter pressing clear liquid tank, returned to a spray mechanism through a clear liquid pump for recycling, the flue gas stream 7 is sent into an electric demister 8 through a connecting pipe, the flue gas stream 7 is subjected to electric demisting through a high-voltage power supply 9, and the treated purified flue gas 10 is discharged through a fan.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. A device for purifying smelting flue gas wet arsenic removal comprises a reverse spray tower (3), and is characterized in that a spray mechanism is installed in the reverse spray tower (3), a flue gas inlet (13) is formed in one side of the reverse spray tower (3), a reverse spray pipe (2) is connected to the flue gas inlet (13), a sedimentation tank (5) is connected to one end of the reverse spray tower (3), a plate-and-frame filter press (6) is connected to one side of the sedimentation tank (5), an electric demister (8) is connected to the plate-and-frame filter press (6), and a high-voltage power supply (9) is connected to the electric demister (8).

2. The device for purifying the wet arsenic removal of the smelting flue gas according to claim 1, wherein the spraying mechanism comprises a circulating inlet (11) arranged at the top of the reverse spraying pipe (2), the electric demister (8) is connected with the circulating inlet (11), 1-4 layers of spraying plates (12) are arranged in the reverse spraying pipe (2), and a collecting box (14) is arranged at the inner bottom of the reverse spraying pipe (2).

3. The wet arsenic removal device for purifying smelting flue gas according to claim 1, wherein a discharge pipe is arranged at one side of the bottom of the reverse spray tower (3), the reverse spray tower (3) is connected with the sedimentation tank (5) through the discharge pipe, and a circulating pump (4) is arranged between the discharge pipe and the sedimentation tank (5).

4. The wet arsenic removal device for purifying smelting flue gas according to claim 1, wherein the plate-and-frame filter press (6) is provided with a protection frame (15), an oil cylinder (16) is arranged on one side of the protection frame (15), a pull plate rod (17) is arranged in the protection frame (15), one end of the pull plate rod (17) penetrates through the protection frame (15) and is connected in the oil cylinder (16), one end of the pull plate rod (17) positioned in the protection frame (15) is connected with a filter plate (18), and a recovery tank (19) is arranged at the bottom of the filter plate (18).

5. The wet arsenic removal device for purifying smelting flue gas according to claim 1, wherein a transmission pipe is arranged between the plate-and-frame filter press (6) and the electric demister (8), flue gas flow (7) is arranged in the transmission pipe, a fan is connected to the top of the electric demister (8), a discharge port is arranged on the fan, and purified flue gas (10) is arranged in the discharge port.

6. The device for purifying smelting flue gas by wet arsenic removal according to claim 1, wherein the reverse shower pipe (2) is provided with a two-fluid nozzle (1).