CN215539540U

CN215539540U - Lead, cadmium-containing smoke collection hood and smoke purification system for flue gas

Info

Publication number: CN215539540U
Application number: CN202122086951.3U
Authority: CN
Inventors: 王海峰; 李福平
Original assignee: Inner Mongolia Langli Environmental Protection Technology Co ltd
Current assignee: Inner Mongolia Langli Environmental Protection Technology Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-01-18
Anticipated expiration: 2031-09-01

Abstract

The utility model relates to the technical field of non-ferrous metal smelting waste gas collection, in particular to a smoke collecting hood for lead-and cadmium-containing smoke and a smoke purification system; the device comprises a cover body for collecting flue gas, wherein an auxiliary cover is arranged on the outer edge of the cover body, a cooling device for primarily cooling the flue gas is arranged in the cover body, one side of an inlet of the cooling device is connected with one side of an air inlet pipe, and the other end of the air inlet pipe is connected with a refrigerating end of a vortex tube; one side of the outlet of the cooling device is connected into an annular pipe through an air outlet pipe, and the structure of the annular pipe corresponds to that of the cover body; the annular pipe leads high-pressure gas into the auxiliary cover through a plurality of connecting pipes; compressed cold air enters the auxiliary cover after passing through the cooling device to form an air curtain layer; the toxic smoke gas overflow condition is reduced to a certain extent.

Description

Lead, cadmium-containing smoke collection hood and smoke purification system for flue gas

Technical Field

The utility model relates to the technical field of non-ferrous metal smelting waste gas collection, in particular to a smoke collecting hood for lead-and cadmium-containing smoke and a smoke purification system.

Background

The production of lead and cadmium elements in the colored industry occupies an important position, the demand of the lead and cadmium elements is continuously increased along with the continuous development of the radiation protection industry and the electronic industry, the industry is continuously developed and expanded, and because the lead and the cadmium are elements with higher toxicity, the related industrial pollution also becomes the environmental protection social problem concerned by the nation and the society.

Because the melting point and the boiling point of lead and cadmium elements are lower by 300-500 ℃, gas-phase volatile components are larger in the high-temperature smelting or refining process and exist in the form of quite fine aerosol or even gaseous substances, particularly because the raw materials are brought in and a plurality of additives such as burnt acid, alkali, rosin, wood carbon and the like are added to meet the process requirements, the components of the flue gas are more complicated, the gas contains a corresponding amount of acid, alkali, steam, rosin and other organic matter gases and dust besides metal lead and cadmium steam, and the flue gas has great harmfulness and needs to be purified.

The fume collecting hood plays a role in collecting the gas of the waste gas, and is convenient for operation activities such as stirring in the high-temperature smelting or refining process; therefore, the smoke collecting hood and the smelting furnace need to keep a certain installation distance; the fume collecting hood is typically a fixed mounting structure that is relatively fixed in vertical distance relative to the furnace; the fume collecting hood has a certain distance with the smelting furnace, so that the effect is poor during gas collection and smoke discharge; lead and cadmium fumes with partial toxicity are caused to overflow sometimes; therefore, the inventor designs the smoke collecting hood for the lead and cadmium-containing smoke and the smoke purifying system applying the smoke collecting hood.

Disclosure of Invention

In order to solve the defects of the prior art, the utility model provides the smoke collecting hood for the lead-and cadmium-containing smoke and the smoke purification system, and the device can generate a partition air curtain around the smoke collecting hood, thereby reducing the overflow of toxic smoke to a certain extent; the lead and cadmium flue gas treatment device is used for solving the problem that in the prior art, a certain distance is reserved between a smoke collecting hood and a smelting furnace, and lead and cadmium flue gases with partial toxicity are overflowed sometimes.

The technical scheme of the utility model is as follows: a smoke collecting hood for lead-and cadmium-containing smoke comprises a hood body used for collecting the smoke, wherein an auxiliary hood is arranged at the outer edge of the hood body, a cooling device used for preliminarily cooling the smoke is arranged inside the hood body, one side of an inlet of the cooling device is connected with one side of an air inlet pipe, and the other end of the air inlet pipe is connected with a refrigerating end of a vortex tube; one side of the outlet of the cooling device is connected into an annular pipe through an air outlet pipe, and the structure of the annular pipe corresponds to that of the cover body; the annular pipe leads high-pressure gas into the auxiliary cover through a plurality of connecting pipes; the compressed cold air enters the auxiliary cover after passing through the cooling device to form an air curtain layer.

Specifically, the cooling device comprises a cooling pipe and a mounting frame for fixing the cooling pipe, and the cooling pipe is fixed inside the cover body through the mounting frame; the middle part of the cooling pipe is bent and extended, a plurality of aluminum foil fins are arranged on the cooling pipe, and the cooling pipe is preferably of a snake-shaped structure.

Furthermore, the cover body is of a pyramid structure; the auxiliary cover is a square structure corresponding to the pyramid structure, and four sides of the auxiliary cover are provided with four gas gathering grooves; the lower side of the air gathering groove is rotatably connected with an adjusting plate, and the direction of the air curtain can be adjusted through the adjusting plate; be equipped with the baffle in supplementary cover, the baffle passes through connecting portion with supplementary cover to be fixed, and there is the clearance in baffle and supplementary cover inner chamber.

Optionally, the connecting pipes are respectively provided with a one-way valve.

Preferably, a fireproof net is arranged at an inlet below the cover body, and comprises a support frame body and an asbestos net which is fixed on the support frame body; two opposite slide ways are fixed at the inlet under the cover body, and the support frame body is in inserted fit with the slide ways.

The application also discloses a flue gas purification system, which comprises the fume collecting hood of any one of the above embodiments, and the fume collection of toxic lead and cadmium flue gases is carried out through the fume collecting hood.

The utility model achieves the following beneficial effects: introducing a high-pressure gas source in a factory into a gas inlet end of a vortex tube, and introducing cooled compressed gas into a cooling device; one side of the outlet of the cooling device is connected into an annular pipe through an air outlet pipe, and the structure of the annular pipe corresponds to that of the cover body; the annular pipe leads high-pressure gas into the auxiliary cover through a plurality of connecting pipes; after high-pressure gas is introduced into the auxiliary cover, an air curtain layer is formed on the outer side of the cover body; the air curtain is used for generating partition, so that the toxic smoke gas overflow condition is reduced to a certain extent; meanwhile, two opposite slide ways are fixed at the inlet below the cover body, and the support frame body is in inserted fit with the slide ways; the installation mode is convenient to disassemble and is convenient for replacing the fireproof net.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the cooling tube structure of the present invention.

Fig. 3 is a schematic view of the position of the auxiliary shield of the present invention.

Fig. 4 is a schematic view of the structure of the regulating plate of the present invention.

FIG. 5 is a schematic view of the separator structure of the present invention.

Fig. 6 is a schematic structural view of the support frame of the present invention.

Figure 7 is a schematic diagram of a flue gas cleaning system of the present invention.

In the figure, 1, a cover body; 2. an auxiliary cover; 3. an air inlet pipe; 4. a vortex tube; 5. an air outlet pipe; 6. an annular tube; 7. a connecting pipe; 8. a cooling tube; 9. a mounting frame; 10. aluminum foil fins; 11. a gas gathering tank; 12. an adjusting plate; 13. a one-way valve; 14. a partition plate; 15. a connecting portion; 16. a support frame body; 17. an asbestos web; 18. a slideway.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

The smoke collecting hood is mainly used for collecting waste gas generated in non-ferrous metal smelting, the smoke collecting hood plays a role in collecting the waste gas, and the smoke collecting hood is spaced from a smelting furnace to a certain extent after being fixedly installed, so that the effect is poor during gas collection and smoke exhaust; lead and cadmium fumes with partial toxicity are caused to overflow sometimes; if not treated, the influence on the body of an operator is very large for a long time, so that the fume collecting hood needs to be improved to solve the problem that toxic lead and cadmium fume overflows.

For clear understanding of the technical solution of the present application, the smoke collecting hood provided by the present application will be described in detail below with reference to specific embodiments and accompanying drawings.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Example one

The production of lead and cadmium elements in the non-ferrous industry plays an important role, and the fume collecting hood plays a role in collecting the gas gathering of the waste gas when the fume containing lead and cadmium is carried out, and is usually fixed, so that the effect of gas gathering and fume discharging is poor; lead and cadmium fumes with partial toxicity are caused to overflow sometimes; as shown in fig. 1, the utility model provides a fume collecting hood for lead-and cadmium-containing fume, which comprises a hood body 1 for collecting fume, wherein the hood body 1 is of a pyramid structure, and the hood body 1 can be of other structures suitable for application scenes such as square, round and the like; the outer edge of the cover body 1 is provided with an auxiliary cover 2, the structure of the auxiliary cover 2 corresponds to that of the cover body 1, and the auxiliary cover is used for forming an air curtain layer outside the cover body 1 after high-pressure gas is introduced, so that the condition that toxic lead and cadmium flue gas overflows is reduced through the air curtain; a cooling device for primarily cooling the flue gas is arranged in the cover body 1, one side of an inlet of the cooling device is connected with one side of an air inlet pipe 3, and the other end of the air inlet pipe 3 is connected with a refrigerating end of a vortex tube 4; introducing a high-pressure gas source in a factory into the gas inlet end of the vortex tube 4, and introducing the cooled compressed gas into a cooling device; one side of the outlet of the cooling device is connected into an annular pipe 6 through an air outlet pipe 5, and the structure of the annular pipe 6 corresponds to that of the cover body 1; the annular pipe 6 leads high-pressure gas into the auxiliary cover 2 through a plurality of connecting pipes 7; after high-pressure gas is introduced into the auxiliary cover 2, an air curtain layer is formed outside the cover body 1; the air curtain is used for generating partition, so that the toxic smoke overflow condition is reduced to a certain extent.

Example two

As shown in fig. 2, the cooling device includes a cooling tube 8 and a mounting bracket 9 for fixing the cooling tube 8, and the cooling tube 8 is fixed inside the cover 1 through the mounting bracket 9; one end of the cooling pipe 8 is connected with the air inlet pipe 3, the other end is connected with the air outlet pipe 5, the middle part of the cooling pipe 8 is bent and extended, and a snake-shaped structure is preferably adopted; a plurality of aluminum foil fins 10 are arranged on the cooling pipe 8 to increase the cooling effect.

EXAMPLE III

As shown in fig. 3-5, when the cover body 1 is a pyramid structure, the auxiliary cover 2 is a square structure, and four air-gathering grooves 11 are formed on four sides of the auxiliary cover 2; the lower side of the air gathering groove 11 is rotatably connected with an adjusting plate 12, and the direction of the air curtain can be adjusted through the adjusting plate 12, so that the air curtain is convenient to apply to various use occasions; the connecting pipes 7 communicated with the auxiliary cover 2 are respectively provided with one-way valves 13, and the conduction direction is introduced into the auxiliary cover 2 through the annular pipe 6; the one-way valve 13 can ensure that the gas in the annular pipe 6 is uniformly discharged; simultaneously be equipped with baffle 14 in supplementary cover 2, baffle 14 passes through connecting portion 15 with supplementary cover 2 and fixes, and baffle 14 and supplementary 2 inner chambers of covering have the clearance, have increased the effect of evenly giving vent to anger.

Example four

In order to prevent the fire from burning into the cover body 1 during the feeding process, a fireproof net is arranged at an inlet below the cover body 1 as shown in fig. 6; the fireproof net comprises a support frame body 16 and an asbestos net 17, and the asbestos net 17 is fixed on the support frame body 16; two opposite slide ways 18 are fixed at the inlet below the cover body 1, and the support frame body 16 is in inserted fit with the slide ways 18; the installation mode is convenient to disassemble and is convenient for replacing the fireproof net.

EXAMPLE five

The application also discloses a flue gas purification system, which comprises the smoke collecting hood of any one of the embodiments, wherein the smoke collecting hood enters a flue gas pipeline and enters a fluidized adsorber from an outlet of the flue gas pipeline, and flue gas is subjected to adsorption, condensation and collision reaction with mixed adsorption powder in the fluidized adsorber; discharging the reacted powder into an emptying bin through an air locking ash discharging device at a feed opening of the fluidized absorber due to gravity; flue gas enters a pre-powder collector through an upper gas outlet of a fluidized absorber, 75% of dust in weight percentage is removed from the flue gas in the pre-processor through centrifugation or gravity, the collected dust returns to the fluidized absorber through a star-shaped dust discharging valve at a feed opening of the pre-processor, other flue gas dust with the lighter weight percentage of 25% enters a sintering plate dust collector through a gas outlet of the pre-powder collector, an air mixing valve and the sintering plate dust collector, and after high-precision filtration, clean gas enters a fan from the gas outlet of the sintering plate dust collector and is discharged through a chimney; the dust gets into the recovery feed bin by bottom discharge mouth through defeated grey device all the way, gets into the powder system through defeated grey device another way, is equipped with powder system fan in the powder system, and powder system fan blows the mouth and gets into the fluidization adsorber through the pipeline, adsorbs cyclic utilization.

The above-mentioned fixing methods, if not separately described, all use the means of common technique of those skilled in the art, such as welding, nesting, or screw fixing.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a lead, cadmium flue gas is with collection petticoat pipe, includes cover body (1) that is used for collecting the flue gas, its characterized in that: an auxiliary cover (2) is arranged at the outer edge of the cover body (1), a cooling device for primarily cooling flue gas is arranged in the cover body (1), one side of an inlet of the cooling device is connected with one side of an air inlet pipe (3), and the other end of the air inlet pipe (3) is connected with a refrigerating end of a vortex tube (4); one side of the outlet of the cooling device is connected into an annular pipe (6) through an air outlet pipe (5), and the structure of the annular pipe (6) corresponds to that of the cover body (1); the annular pipe (6) leads high-pressure gas into the auxiliary cover (2) through a plurality of connecting pipes (7); the compressed cold air enters the auxiliary cover (2) after passing through the cooling device to form an air curtain layer.

2. The fume collecting hood for the fume containing lead and cadmium according to claim 1, which is characterized in that: the cooling device comprises a cooling pipe (8) and a mounting rack (9) for fixing the cooling pipe (8), and the cooling pipe (8) is fixed in the cover body (1) through the mounting rack (9); the middle part of the cooling pipe (8) is bent and extended, and a plurality of aluminum foil fins (10) are arranged on the cooling pipe (8).

3. The fume collecting hood for the fume containing lead and cadmium as claimed in claim 2, wherein: the cooling pipe (8) is of a serpentine structure.

4. The fume collecting hood for the fume containing lead and cadmium according to claim 1, which is characterized in that: the cover body (1) is of a pyramid structure.

5. The fume collecting hood containing lead and cadmium for fume according to claim 4, wherein: the auxiliary cover (2) is of a square structure, and four sides of the auxiliary cover (2) are provided with four gas gathering grooves (11); the lower side of the air gathering groove (11) is rotatably connected with an adjusting plate (12), and the direction of the air curtain can be adjusted through the adjusting plate (12).

6. The fume collecting hood containing lead and cadmium for fume according to claim 5, wherein: a partition plate (14) is arranged in the auxiliary cover (2), the partition plate (14) and the auxiliary cover (2) are fixed through a connecting part (15), and a gap exists between the partition plate (14) and the inner cavity of the auxiliary cover (2).

7. The fume collecting hood for the fume containing lead and cadmium according to claim 1, which is characterized in that: the connecting pipes (7) are respectively provided with a one-way valve (13).

8. The fume collecting hood for the fume containing lead and cadmium according to claim 1, which is characterized in that: the inlet below the cover body (1) is provided with a fireproof net, the fireproof net comprises a support frame body (16) and an asbestos net (17), and the asbestos net (17) is fixed on the support frame body (16).

9. The fume collecting hood for the fume containing lead and cadmium according to claim 8, wherein: two opposite slide ways (18) are fixed at the inlet below the cover body (1), and the support frame body (16) is in inserted fit with the slide ways (18).

10. A flue gas purification system is characterized in that: comprising a smoke-collecting hood according to claim 1.