CN212362867U

CN212362867U - Dust removal device for dead burned magnesium oxide

Info

Publication number: CN212362867U
Application number: CN202020930641.8U
Authority: CN
Inventors: 张露; 蔡鑫; 于秋月; 刘乐运; 张义先
Original assignee: Haicheng Magnesium Mine Group Co ltd
Current assignee: Haicheng Magnesium Mine Group Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-15
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to a dust removing device for dead burned magnesia, which comprises a dust collecting hood, a bag-type dust remover, a flue gas water cooler and a cooler, wherein a circulating water pipe is arranged on the inner wall of the cooler; the flue gas water cooler consists of an inner pipe and a shell, the inner pipe is fixedly connected with the shell, the inner pipe and the shell are coaxially arranged, and a cooling water pipe is arranged on the pipe wall of the inner pipe; the dust collecting covers are connected with an inlet of a flue gas water cooler through a pipeline, an outlet of the flue gas water cooler is connected with a cooler, and the cooler enters the bag-type dust collector through a dust removing fan; the cooling water pipe and the circulating water pipe are both connected with the circulating water tank. The utility model has the advantages that: the whole structure is reasonable, the flue gas water cooler and the cooler are used for cooling the flue gas and the temperature-equalizing flue gas, so that the bag-type dust remover can adapt to the process of re-burning the magnesium oxide, the service life of the bag-type dust remover is prolonged, and the dust removal is stable. Meanwhile, the heat is recovered through the cooling water pipe and the circulating water pipe, so that the energy is saved and the environment is protected.

Description

Dust removal device for dead burned magnesium oxide

Technical Field

The utility model belongs to dust removing equipment, and relates to a heavy-burned magnesia dust removing device.

Background

The bag-type dust collector is technically mature, low in cost and high in efficiency, but the bag-type dust collector cannot be directly used due to the fact that the flue gas temperature changes greatly during production of a magnesia kiln adopted in a process of reburning magnesium oxide, and the main reason is that: the low-temperature flue gas containing water vapor can be condensed on the surface of the filter cloth to block ventilation, and the high-temperature flue gas can ablate the cloth bag, so that the cloth bag dust remover can only be suitable for flue gas dust removal in a short smelting time between high temperature and low temperature, and the cloth bag dust remover is removed from dust removal equipment used in a reburning or middle-grade magnesia kiln. In addition, in the process, the heat of the high-temperature flue gas is directly discharged along with the flue gas, so that energy is wasted. If a wet dust removal device is adopted, water is wasted, serious pollution is brought to water resources, and the emission concentration of the wet dust removal device is also 100mg/Nm³The above; although the energy consumption of the cyclone dust collector is low and the dust emission concentration is lower than that of the first two dust collection modes, the emission concentration of the cyclone dust collector still cannot meet the requirements of the existing environment-friendly emission standard.

Disclosure of Invention

For overcoming the defects of the prior art, the utility model aims at providing a heavy-burning magnesia dust collector, which enables a bag-type dust collector to adapt to the heavy-burning magnesia process, meets the dust collection requirement and simultaneously realizes the waste heat recovery.

In order to achieve the above object, the utility model discloses a following technical scheme realizes:

a dust removal device for dead burned magnesia comprises a dust hood, a bag-type dust remover, a flue gas water cooler and a cooler, wherein a circulating water pipe is arranged on the inner wall of the cooler; the flue gas water cooler consists of an inner pipe and a shell, the inner pipe is fixedly connected with the shell, the inner pipe and the shell are coaxially arranged, and a cooling water pipe is arranged on the pipe wall of the inner pipe; the dust collecting covers are connected with an inlet of a flue gas water cooler through a pipeline, an outlet of the flue gas water cooler is connected with a cooler, and the cooler enters the bag-type dust collector through a dust removing fan; the cooling water pipe and the circulating water pipe are both connected with the circulating water tank.

The shell is provided with an air outlet pipe.

The inner pipe is of a straight-tube structure, and the cooling water pipe is spirally wound on the inner pipe.

The air outlet of the bag-type dust collector is connected with the exhaust funnel through a fan.

The bottom of the bag-type dust collector is provided with an ash bucket.

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

the integral structure of the heavy-burned magnesia dust removal device is reasonable, and the flue gas water cooler and the cooler are used for cooling the flue gas and the temperature-equalizing flue gas, so that the bag-type dust remover can adapt to the heavy-burned magnesia process, the service life of the bag-type dust remover is prolonged, and the dust removal is stable. Meanwhile, the heat is recovered through the cooling water pipe and the circulating water pipe, so that the energy is saved and the environment is protected.

Drawings

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

Fig. 2 is a schematic view of the structure of the cooler.

FIG. 3 is a schematic diagram of a flue gas water cooler.

In the figure: 1-dust collecting hood 2-flue gas water cooler 3-cooler 4-bag dust remover 5-dust removing fan 6-cooling water pipe 7-inner pipe 8-shell 9-fan 10-exhaust funnel 11-scraper conveyor 12-bucket elevator 13-ash storage tank 14-circulating water pipe 15-ash cleaning mouth 16-air outlet pipe 17-ash bucket.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.

Referring to fig. 1, the dust removing device for the dead burned magnesia comprises a dust hood 1, a bag-type dust remover 4, a flue gas water cooler 2 and a cooler 3, wherein the dust hood 1 is used for collecting flue gas of a magnesia kiln, a plurality of dust hoods 1 are connected with an inlet of the flue gas water cooler 2 through a pipeline, an outlet of the flue gas water cooler 2 is connected with the cooler 3, and the cooler 3 enters the bag-type dust remover 4 through a dust removing fan 5; referring to fig. 2, the inner wall of the cooler 3 is provided with a circulating water pipe 14, and the bottom of the cooler is provided with an ash discharge hopper, so that ash discharge and recovery are facilitated; referring to fig. 3, the flue gas water cooler 2 is composed of an inner tube 7 and a shell 8, the inner tube 7 is fixedly connected with the shell 8, the inner tube 7 and the shell 8 are coaxially arranged, a cooling water tube 6 is arranged on the wall of the inner tube 7, the structure can prolong the cooling stroke, and an air outlet tube 16 is arranged on the shell 8; the inner tube 7 is a straight tube structure, the top is the smoke inlet, the vertical structure can conveniently clean the wall of the inner tube 7, the cooling water tube 6 is spirally wound on the inner tube 7, the bottom end of the inner tube 7 directly corresponds to the ash cleaning port 15 at the bottom of the flue gas water cooler 2, and dust is conveniently cleaned and recovered. The flue gas water cooler 2 is used for mixing the flue gas temperature of each kiln, balancing the flue gas temperature, and simultaneously reducing the flue gas temperature in a heat exchange mode. And the cooling water pipe 6 and the circulating water pipe 14 are both connected with a circulating water tank, and the circulating water tank collects the waste heat of the kiln. The air outlet of the bag-type dust collector 4 is communicated with the input end of a fan 9, and the output end of the fan 9 is connected with the input end of an exhaust funnel 10.

Wherein, sack cleaner 4 bottom is equipped with ash bucket 17, and ash bucket 17 bottom is passed through the dust discharge valve and is connected with the ash discharge mouth, and the fortune ash tank car can correspond with the ash discharge mouth, retrieves the dust through fortune ash tank car. The bottom of the ash discharging opening can be provided with a scraper conveyor 11, the scraper conveyor 11 conveys dust of a plurality of ash buckets 17 to the input end of a bucket elevator 12 through a pipeline, and the output end of the bucket elevator 12 is connected with an ash storage groove 13 through a pipeline, so that the dust can be conveniently and centrally treated, as shown in figure 1. The cooling water pipe 6 and the circulating water pipe 14 select whether to feed cooling water according to the temperature of the flue gas.

Referring to fig. 1-3, the working process is as follows: the dust hood 1 can collect smoke of different time periods of a plurality of magnesia kilns, the smoke enters the smoke water cooler 2 from the top through the pipeline by the dust hood 1, the cooling water pipe 6 of the smoke water cooler 2 is used for cooling the smoke, the smoke flows downwards through the inner pipe 7 and enters a cavity between the inner pipe 7 and the shell 8, the cooling water pipe 6 is used for continuously cooling the smoke, finally the smoke is discharged from the air outlet pipe 16 at the upper part of the shell 8 and then enters the cooler 3 from the top through the pipeline, the smoke is stabilized in the cooler 3 and can be continuously cooled through the circulating water pipe 14, the cooled dust-containing gas can meet the working conditions of the bag-type dust remover 4, the smoke enters the bag-type dust remover 4 from the lower part of the cooler 3 through the dust removal fan 5, and the smoke enters the exhaust barrel 10 through the fan 9 after being processed.

The utility model has the advantages of reasonable overall structure, utilize flue gas water cooler, cooler cooling flue gas and samming flue gas, make the sack cleaner can adapt to the heavy-duty magnesia technology of burning, the life of extension sack cleaner, it is stable to remove dust. Meanwhile, the heat is recovered through the cooling water pipe and the circulating water pipe, so that the energy is saved and the environment is protected.

Claims

1. The dust removal device for the dead burned magnesia is characterized by comprising a dust hood, a bag-type dust remover, a flue gas water cooler and a cooler, wherein a circulating water pipe is arranged on the inner wall of the cooler; the flue gas water cooler consists of an inner pipe and a shell, the inner pipe is fixedly connected with the shell, the inner pipe and the shell are coaxially arranged, and a cooling water pipe is arranged on the pipe wall of the inner pipe; the dust collecting covers are connected with an inlet of a flue gas water cooler through a pipeline, an outlet of the flue gas water cooler is connected with a cooler, and the cooler enters the bag-type dust collector through a dust removing fan; the cooling water pipe and the circulating water pipe are both connected with the circulating water tank.

2. The dust removing device for dead burned magnesia as claimed in claim 1, wherein the housing is provided with an air outlet pipe.

3. The dust removing device for dead burned magnesia as claimed in claim 1, wherein the inner tube is a straight tube structure, and the cooling water pipe is spirally wound around the inner tube.

4. The heavy-burned magnesium oxide dust removal device of claim 1, wherein an air outlet of the bag-type dust remover is connected with an exhaust funnel through a fan.

5. The dust removing device for dead burned magnesia as claimed in claim 1, wherein the bottom of the bag-type dust remover is provided with an ash hopper.