Suspension magnetization roasting flue gas treatment device

Abstract

The utility model discloses a suspension magnetization roasting flue gas treatment device. The device comprises a dust removal water tank, treatment liquid is contained in a cavity of the dust removal water tank, the upper end of the cavity is communicated with a flue gas inlet pipeline, the flue gas inlet pipeline extends into the cavity and is communicated into the treatment liquid, and a porous distributor is arranged at the tail end of the flue gas inlet pipeline; a contraction pipeline is communicated above the dust removal water tank, a flue gas outlet pipeline is communicated above the contraction pipeline, and a high-pressure steam distributor is arranged at the joint of the contraction pipeline and the flue gas outlet pipeline; a liquid level instrument is arranged above the dust removal water tank, a water replenishing pipe is communicated above the dust removal water tank, an electric valve is arranged on the water replenishing pipe, and a controller is arranged to be respectively connected with the liquid level instrument and the electric valve; the bottommost end of the dust removal water tank is communicated with a slurry discharge pipeline, and a slurry pump is arranged in the slurry discharge pipeline; and a concentration meter is arranged above the bottom of the dust removal water tank. The device is high in safety performance, rapid in treatment and good in purification effect.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral processing, in particular to a suspended magnetized roasting fume treatment device. Background Art

[0002] Bag dust collectors are commonly used in suspended magnetization roasting. They mainly use the filtering performance of dust bags to remove dust. When the dust-containing gas enters the bag dust collector, under the action of gravity, the dust with larger particle size and specific gravity settles into the ash hopper, and the dust with smaller particle size and specific gravity is separated by the filtration of the dust bags, thereby achieving the purpose of purifying the gas.

[0003] However, in actual use, the operating temperature of commonly used dust bags is generally below 250°C, and they are unable to directly handle high-temperature flue gas and sulfur dioxide. There are hidden dangers of combustion, explosion and fire accidents in the dust bags, and maintaining the dust bags is time-consuming and labor-intensive. Utility Model Content

[0004] The utility model aims to provide a suspended magnetized roasting fume treatment device with high safety performance, automatic treatment and good purification effect in view of the shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a suspended magnetized roasting flue gas treatment device, including a dust removal water tank, a chamber of the dust removal water tank is filled with a treatment liquid, the upper end of the chamber is connected to a flue gas inlet pipe, the flue gas inlet pipe extends into the interior of the chamber and passes into the treatment liquid, a porous distributor is provided at the end of the flue gas inlet pipe, and the porous distributor is completely immersed below the liquid level of the treatment liquid; a contraction pipe is connected above the dust removal water tank, a flue gas outlet pipe is connected above the contraction pipe, a high-pressure steam distributor is provided at the connection between the contraction pipe and the flue gas outlet pipe, and the high-pressure steam distributor is connected to the high-pressure steam pipe; a liquid level meter is installed above the dust removal water tank, a supplementary water pipe is connected above the dust removal water tank, an electric valve is provided on the supplementary water pipe, and a controller is provided to connect the liquid level meter and the electric valve respectively; the bottom end of the dust removal water tank is connected to a slurry discharge pipe, and a slurry pump is provided in the slurry discharge pipe; a concentration meter is provided above the bottom of the dust removal water tank.

[0006] Preferably, the upper part of the dust removal water tank is cylindrical, and the lower part is inverted cone. It should be further explained that the inverted cone shape can realize the sedimentation of dust particles in water and the gravity flow of slurry at the bottom of the dust particles, so that the dust particles can be accumulated at the bottom of the dust removal water tank.

[0007] Preferably, the treatment liquid is a mixture of absorbent and water. It should be further explained that the absorbent is usually lime, which is used to neutralize sulfur dioxide and reduce the removal of sulfur dioxide.

[0008] Preferably, a gas channel is provided in the high-pressure steam distributor, and a high-pressure steam nozzle is provided below the gas channel.

[0009] Compared with the prior art, the utility model has the following advantages: the utility model is suitable for high-temperature flue gas, uses water and absorbent to capture dust particles and sulfur dioxide, the dust removal water tank realizes automatic liquid level control, the slurry pump is started intermittently to discharge dust particles, the equipment is simple and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Among them, 1- flue gas inlet pipe, 2- porous distributor, 3- dust removal water tank, 31- chamber, 4- contraction pipe, 5- high-pressure steam distributor, 6- high-pressure steam pipe, 7- flue gas outlet pipe, 8- liquid level meter, 9- water supply pipe, 10- electric valve, 11- controller, 12- slurry discharge pipe, 13- slurry pump, 14- concentration meter. DETAILED DESCRIPTION

[0012] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0013] like Figure 1The suspended magnetized roasting flue gas treatment device shown comprises a dust removal water tank 3, the upper half of which is cylindrical and the lower half is inverted conical. The chamber 31 of the dust removal water tank 3 is filled with a treatment liquid, which is a mixture of lime and water. The upper end of the chamber 31 is connected to a flue gas inlet pipe 1, which extends into the interior of the chamber 31 and passes into the treatment liquid. A porous distributor 2 is provided at the end of the flue gas inlet pipe 1, which evenly disperses the flue gas so that the flue gas can react more fully with the mixture, and the porous distributor 2 is completely immersed below the liquid level of the treatment liquid; a contraction pipe 4 is connected above the dust removal water tank 3, a flue gas outlet pipe 7 is connected above the contraction pipe 4, a high-pressure steam distributor 5 is provided at the connection between the contraction pipe 4 and the flue gas outlet pipe, a gas channel is provided in the high-pressure steam distributor 5, and a high-pressure steam spray nozzle is provided below the gas channel. head, the high-pressure steam distributor 5 is connected to the high-pressure steam pipeline 6; a liquid level meter 8 is installed above the dust removal water tank 3, and a supplementary water pipe 9 is connected above the dust removal water tank 3. An electric valve 10 is provided on the supplementary water pipe 9. A controller 11 is provided to connect the liquid level meter 8 and the electric valve 10 respectively. The liquid level meter 8 continuously monitors the liquid level of the mixed liquid. When the liquid level drops, the controller 11 triggers the electric valve 10 to replenish the mixed liquid to the chamber 31 through the supplementary water pipe 9; the bottom of the dust removal water tank 3 is connected to a slurry discharge pipe 12, and a slurry pump 13 is provided in the slurry discharge pipe 12; a concentration meter 14 is provided above the bottom of the dust removal water tank 3, and the concentration meter 14 is set at a short distance upward from the bottom of the inverted cone. When the deposition of solid particles continues to increase, the concentration meter 14 detects that the mass concentration exceeds 5%, triggering the slurry pump 13 to work, and discharge the solid particles accumulated at the bottom of the dust removal water tank 3 through the slurry discharge pipe 12.

[0014] The working principle and process of this embodiment: the flue gas generated by the roasting furnace is led to the porous distributor 2 through the flue gas inlet pipe. The flue gas in the porous distributor 2 is evenly discharged and reacts with the lime in the mixed liquid to absorb and settle the sulfur dioxide and flue gas particles in the flue gas, and the flue gas is purified for the first time. After being treated by the mixed liquid, the flue gas further escapes to the flue gas outlet pipe above the chamber 31, and is further mixed with the reverse airflow given to the high-pressure steam distributor 5 by the high-pressure steam pipe 6 to complete the second purification. The purified gas is discharged through the flue gas outlet pipe 7. After the high-pressure steam purification, the droplets wrapped in the dust particles fall into the mixed liquid in the chamber 31 and are discharged along the slurry discharge pipe 12 at the bottom of the dust removal water tank 3.

[0015] During the reaction process, the liquid level meter 8 continuously monitors the liquid level of the mixed liquid, and triggers the electric valve 10 to open through the controller 11 to promptly replenish the mixed liquid into the chamber 31 through the water supply pipe 9 to maintain the liquid level of the mixed liquid. The settled solid particles are monitored by the concentration meter 14, and when the concentration meter 14 detects a mass concentration ≥5%, the deposited solid particles are promptly discharged from the slurry discharge pipe 12 through the slurry pump 13.

[0016] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A suspended magnetization roasting flue gas treatment device, characterized in that: It comprises a dust removal water tank, wherein the chamber of the dust removal water tank contains treatment liquid, the upper end of the chamber is connected to a flue gas inlet pipe, the flue gas inlet pipe extends into the interior of the chamber and leads to the treatment liquid, a porous distributor is provided at the end of the flue gas inlet pipe, and the porous distributor is completely immersed below the liquid level of the treatment liquid; a contraction pipe is connected above the dust removal water tank, a flue gas outlet pipe is connected above the contraction pipe, a high-pressure steam distributor is provided at the connection between the contraction pipe and the flue gas outlet pipe, and the high-pressure steam distributor is connected to the high-pressure steam pipe; a liquid level meter is installed above the dust removal water tank, a supplementary water pipe is connected above the dust removal water tank, an electric valve is provided on the supplementary water pipe, and a controller is provided to connect the liquid level meter and the electric valve respectively; the bottom end of the dust removal water tank is connected to a slurry discharge pipe, and a slurry pump is provided in the slurry discharge pipe; a concentration meter is provided above the bottom of the dust removal water tank.

2. The suspended magnetization roasting flue gas treatment device according to claim 1, characterized in that: The upper part of the dust removal water tank is cylindrical, and the lower part is in an inverted cone shape.

3. The suspended magnetization roasting flue gas treatment device according to claim 1, characterized in that: The treatment liquid is a mixture of absorbent and water.

4. The suspended magnetization roasting flue gas treatment device according to claim 1, characterized in that: The high-pressure steam distributor has a gas channel, and a high-pressure steam nozzle is arranged below the gas channel.

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