CN215085840U - Dust collecting system for removing and recovering heavy metal dust in flue gas - Google Patents

Dust collecting system for removing and recovering heavy metal dust in flue gas Download PDF

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Publication number
CN215085840U
CN215085840U CN202023190230.9U CN202023190230U CN215085840U CN 215085840 U CN215085840 U CN 215085840U CN 202023190230 U CN202023190230 U CN 202023190230U CN 215085840 U CN215085840 U CN 215085840U
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dust
filter
flue gas
air
dust remover
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CN202023190230.9U
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蒋爱国
祁树业
徐伟
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Jiangsu Kangjie Environment Engineering Co ltd
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Jiangsu Kangjie Environment Engineering Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Treating Waste Gases (AREA)

Abstract

The utility model relates to a dust collecting system for removing and recovering heavy metal dust in flue gas, which comprises a rotary furnace, a secondary combustion settling chamber, a quench tower, a first dust remover, a circulating fluidized bed absorption tower, a second dust remover and an air filter which are connected in sequence, wherein the bottom of the circulating fluidized bed absorption tower is provided with a desulfurizer storage and a water spray nozzle, the middle part is provided with an active coke purification filter layer, and the upper part is provided with an ammonia nozzle; the air outlet of the second dust remover is connected with an air filter, and the air filter is connected with an exhaust chimney through a fan; the first dust remover, the second dust remover and the fan are respectively electrically connected with the control cabinet, and the control cabinet is provided with a PLC (programmable logic controller) and a pulse controller. The utility model discloses it is good with purifying effect to contain the flue gas treatment of heavy metal dust to can retrieve the lead dust in the flue gas. Meanwhile, the air can be further purified; the dust remover adopts the plastic sintered plate filter element, which is beneficial to improving the dust removal effect, has long service life and low cost, and can meet the requirements of the current national relevant environmental protection standard.

Description

Dust collecting system for removing and recovering heavy metal dust in flue gas
Technical Field
The utility model relates to an industrial dust removal technical field, especially a dust collecting system for desorption and retrieve heavy metal dust in the sintering flue gas.
Background
In the secondary lead smelting process, dust, lead fume, lead dust, NOX, SOX, dioxin, heavy metal and other waste gas dust are generated, the lead fume and the lead dust are colorless and odorless in a normal state and exist in the atmosphere in an aerosol state, and according to observation of a microscope, most of the diameters of the lead fume and the lead dust are about 0.1 mu m, so that the lead fume and the lead dust belong to respiratory dust and are extremely harmful to human bodies. Generally, air containing lead smoke and lead dust enters the body through respiratory tract and digestive tract, accumulates in bones, liver, kidney, spleen, brain, etc., and damages nervous system, hematopoietic system, urinary system, digestive system and reproductive organs, causing symptoms such as anemia, muscle and joint pain, digestive system abnormality, and terminal nerve paralysis.
At present, the existing domestic lead fume purification equipment is basically a wet type dust remover, such as a water bath type, a water spraying packed tower, a spray chamber and the like, most of the equipment is a water washing method, the effect of purification and dust removal is not ideal, and the analysis is mainly that the dust particles in the fume are adhered and aggregated with each other by virtue of liquid drops, liquid films, bubbles and the like generated by a washing liquid, and then the dust particles are separated, but lead and lead oxide are stable in chemical property, insoluble in water and small in hydrophilicity, so that the water can only wash the fume particles with larger particle size in the fume, and the common spraying equipment is adopted for lead fume and lead dust in an aerosol state, the aggregation effect and the absorption effect are not ideal, and in addition, the method can not effectively remove harmful substances such as NOX, SOX, dioxin, heavy metals and the like in the exhaust gas.
SUMMERY OF THE UTILITY MODEL
To the problem that the above background art provided, the utility model aims at providing a dust collecting system for desorption and retrieve heavy metal dust in the flue gas, it is better to contain the flue gas treatment and the purifying effect of heavy metal dust, and dust collection efficiency is high.
The purpose of the utility model is realized by adopting the following technical scheme:
the dust collecting system for removing and recovering heavy metal dust in flue gas comprises a rotary furnace, a secondary combustion settling chamber, a quench tower, a first dust remover, a circulating fluidized bed absorption tower, a second dust remover and an air filter which are sequentially connected, wherein a desulfurizer storage is arranged at the bottom of the circulating fluidized bed absorption tower, a water spray nozzle is arranged above the desulfurizer storage, an active coke purification filter layer is arranged in the middle of the desulfurizer storage, and an ammonia nozzle is arranged at the upper part of the active coke purification filter layer; the air outlet of the second dust remover is connected with an air filter, and the air filter is connected with an exhaust chimney through a fan; the first dust remover, the second dust remover and the fan are respectively and electrically connected with a control cabinet, the control cabinet is provided with a PLC (programmable logic controller) and a pulse controller, and the PLC is electrically connected with the pulse controller and a blowing device of the dust remover; the blowing device is arranged on the box body of the dust remover and is connected with the air compressor through a pipeline.
As the utility model discloses a preferred technical scheme, the dust remover is to mould and burn board dust remover, and it includes support, box, jetting device, moulds and burns the board filter core, moulds and burn the board filter core and establish in the box, and the box side is equipped with air intake and air outlet respectively, is equipped with the ash bucket below the box, and the ash bucket lower extreme is connected and is unloaded grey device.
As the preferred technical proposal of the utility model, the plastic burning plate filter element is connected and fixed with the box body through the filter element mounting rack; an air inlet channel is arranged between the air inlet and the air outlet of the box body, and an air quantity regulating valve is arranged on the air inlet channel; the escalator platform is arranged on the box body, and the air inlet channel switching mechanism is arranged on the escalator platform.
As the preferred technical scheme of the utility model, the lower part of the absorption tower of the circulating fluidized bed adopts a Venturi tube which is a conical contraction section, a cylindrical section and a conical expansion section from bottom to top in sequence; the desulfurizer storage is arranged on the conical expansion section; the water spray nozzle is arranged on the conical contraction section, and an electric dust collector is arranged below the conical contraction section.
As the preferred technical proposal of the utility model, the active coke purifying and filtering layer is in a hemispherical shape, and the convex spherical surface faces the direction of the flue gas inlet.
As the utility model discloses a preferred technical scheme, air cleaner includes casing and filter chamber, and casing one side below is equipped with the air inlet, and the opposite side top is equipped with the gas outlet, along a plurality of detachable filter cartridges of air current direction longitudinal arrangement in the filter chamber, every filter cartridge comprises support, base cloth and filter cloth.
As the utility model discloses a preferred technical scheme, the base cloth of filter cartridge is latticed plain weave cloth, and the filter cloth is the thermoplasticity non-woven fabrics, is equipped with the resin viscose layer that is used for air-purifying between base cloth and the filter cloth.
As the preferred technical scheme of the utility model, the base cloth of filter box is latticed plain weave cloth, and filter cloth is the compound filter membrane of PTFE.
As the utility model discloses an optimized technical scheme, be equipped with the flue gas detector between air cleaner and the fan, flue gas detector and fan all are connected with the switch board electricity.
As the preferred technical proposal of the utility model, the rotary furnace is a secondary lead rotary furnace; the control cabinet is electrically connected with the central control room in a wired or wireless mode.
The utility model has the advantages that: compared with the prior art, the utility model discloses it is better to contain the flue gas treatment and the purifying effect of heavy metal dust, and dust collection efficiency is high. Can effectively remove NOX, SOX, dioxin, heavy metal and other harmful components in the lead-containing flue gas, and can recover lead dust in the flue gas. The sintering flue gas can be treated, and simultaneously, the air can be further purified; the dust remover adopts the plastic sintered plate filter element, which is beneficial to improving the dust removal effect and has long service life; the automatic ash discharging device is adopted, so that continuous and stable dust removal and material recovery can be realized, and high-value metal recovery is facilitated.
The utility model discloses dust collecting system's structure is further optimized, satisfies the technological requirement, and its purification performance is good, efficient, use cost is lower, can satisfy the requirement of the relevant environmental protection standard of current country.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the dust collector of the present invention;
fig. 3 is a side view schematic of fig. 2.
In the figure: 1. the device comprises a rotary furnace, 2, a secondary combustion settling chamber, 3, a quench tower, 4, a first dust remover, 5, a circulating fluidized bed absorption tower, 6, a second dust remover, 7, an air filter, 8, a fan, 9, a control cabinet, 10, a plastic burning plate filter element, 11, a support, 12, a box body, 13, a blowing device, 14, an ash discharging device, 15, a staircase platform, 16, an air inlet channel switching mechanism, 17, an air volume adjusting valve, 18, an ash hopper, 19, an air inlet, 20, an air outlet, 21 and a filter element mounting rack; 51. venturi tube 52, water spray nozzle 53, active coke purifying and filtering layer 54, ammonia gas nozzle 55, electric dust collector 56 and desulfurizer storage.
Detailed Description
As shown in fig. 1 to 3, the dust collecting system for removing and recovering heavy metal dust in flue gas comprises a rotary kiln 1, a secondary combustion settling chamber 2, a quench tower 3, a first dust remover 4, a circulating fluidized bed absorption tower 5, a second dust remover 6 and an air filter 7 which are connected in sequence, wherein a desulfurizer storage 56 is arranged at the bottom of the circulating fluidized bed absorption tower 5, a water spray nozzle 52 is arranged above the desulfurizer storage 56, an active coke purification filter layer 53 is arranged in the middle of the desulfurizer storage 56, and an ammonia nozzle 54 is arranged at the upper part of the active coke purification filter layer 53; an air outlet of the second dust remover 6 is connected with an air filter 7, and the air filter 7 is connected with an exhaust chimney through a fan 8; the first dust remover 4, the second dust remover 6 and the fan 8 are respectively and electrically connected with a control cabinet 9, the control cabinet 9 is provided with a PLC (programmable logic controller) and a pulse controller, and the PLC is electrically connected with the pulse controller and a blowing device 13 of the dust remover; the blowing device 13 is arranged on the box body 12 of the dust remover, and the blowing device 13 is connected with an air compressor through a pipeline.
In this embodiment, the dust remover is a plastic sintered plate dust remover, which includes a bracket 11, a box 12, a blowing device 13, and a plastic sintered plate filter element 10, wherein the plastic sintered plate filter element 10 is disposed in the box 12, an air inlet 19 and an air outlet 20 are respectively disposed on the side surface of the box 12, an ash hopper 18 is disposed under the box 12, and the lower end of the ash hopper 18 is connected to an ash discharging device 14.
The plastic sintered plate filter element 10 is connected and fixed with the box body 12 through a filter element mounting frame 21; an air inlet channel is arranged between the air inlet and the air outlet of the box body 12, and an air quantity regulating valve 17 is arranged on the air inlet channel; the box body 12 is provided with an escalator platform 15, and the escalator platform 15 is provided with an air inlet channel switching mechanism 16.
The lower part of the circulating fluidized bed absorption tower 5 of the embodiment adopts a venturi tube 51, and the venturi tube 51 sequentially comprises a conical contraction section, a cylindrical section and a conical expansion section from bottom to top; the desulfurizer storage 56 is arranged on the conical expansion section; the water spray nozzle 52 is arranged at the conical contraction section, and an electric dust collector 55 is arranged below the conical contraction section. The active coke purifying and filtering layer 53 is hemispherical, and the convex spherical surface faces the direction of flue gas inlet. The hemispherical active coke purification filter layer is adopted to mainly adsorb smoke dust and harmful substances on the hemispherical surface, so that the filter area is increased, and the filter effect is improved.
In this embodiment, the air filter 7 includes a housing and a filter chamber, an air inlet is provided below one side of the housing, an air outlet is provided above the other side of the housing, a plurality of detachable filter cartridges are arranged in the filter chamber in the longitudinal direction of the airflow, and each filter cartridge is composed of a support, a base cloth, and a filter cloth. The base cloth of the filter box is latticed plain woven cloth, the filter cloth is thermoplastic non-woven cloth, and a resin adhesive layer for purifying air is arranged between the base cloth and the filter cloth. In another embodiment, the base cloth of the filter box is a mesh plain woven cloth and the filter cloth is a PTFE composite filter membrane.
And a smoke detector is arranged between the air filter 7 and the fan 8, and the smoke detector and the fan 8 are electrically connected with a control cabinet 9. The rotary furnace 1 is a secondary lead rotary furnace; the control cabinet 9 is electrically connected with the central control room in a wired or wireless manner.
The utility model discloses dust collecting system purifies and contains lead flue gas, can effectively get rid of harmful components such as NOX, SOX, dioxin, heavy metal in the flue gas, makes lead smoke emission concentration ≦ 0.3mg/Nm3Pb discharge rate less than or equal to 50g/h, mean value of dioxin per day<0.5TEQ ng/m3，SOX<50mg/Nm3，NOX<50mg/Nm3Particles of<2.5mg/Nm3. The utility model discloses retrieve the lead dust in the flue gas simultaneously, purification performance is good, efficient, and use cost is lower.

Claims (7)

1. The utility model provides a dust collecting system for desorption and retrieve heavy metal dust in flue gas which characterized by: the dust collecting system comprises a rotary furnace, a secondary combustion settling chamber, a quench tower, a first dust remover, a circulating fluidized bed absorption tower, a second dust remover and an air filter which are sequentially connected, wherein a desulfurizer storage is arranged at the bottom of the circulating fluidized bed absorption tower, a water spray nozzle is arranged above the desulfurizer storage, an active coke purification filter layer is arranged in the middle of the active coke purification filter layer, and an ammonia nozzle is arranged at the upper part of the active coke purification filter layer; the air outlet of the second dust remover is connected with an air filter, and the air filter is connected with an exhaust chimney through a fan; the first dust remover, the second dust remover and the fan are respectively and electrically connected with a control cabinet, the control cabinet is provided with a PLC (programmable logic controller) and a pulse controller, and the PLC is electrically connected with the pulse controller and a blowing device of the dust remover; the blowing device is arranged on the box body of the dust remover and is connected with the air compressor through a pipeline;
the dust remover is a plastic burning plate dust remover and comprises a support, a box body, a blowing device and a plastic burning plate filter element, wherein the plastic burning plate filter element is arranged in the box body; the plastic sintered plate filter element is connected and fixed with the box body through the filter element mounting frame; an air inlet channel is arranged between the air inlet and the air outlet of the box body, and an air quantity regulating valve is arranged on the air inlet channel; the escalator platform is arranged on the box body, and the air inlet channel switching mechanism is arranged on the escalator platform;
the lower part of the absorption tower of the circulating fluidized bed adopts a Venturi tube which sequentially comprises a conical contraction section, a cylindrical section and a conical expansion section from bottom to top; the desulfurizer storage is arranged on the conical expansion section; the water spray nozzle is arranged on the conical contraction section, and an electric dust collector is arranged below the conical contraction section.
2. The dust collecting system for removing and recovering heavy metal dust in flue gas according to claim 1, which is characterized in that: the active coke purifying and filtering layer is in a hemispherical shape, and the convex spherical surface faces to the direction of flue gas inlet.
3. The dust collecting system for removing and recovering heavy metal dust in flue gas according to claim 1, which is characterized in that: the air filter comprises a shell and a filter chamber, wherein an air inlet is formed below one side of the shell, an air outlet is formed above the other side of the shell, a plurality of detachable filter boxes are longitudinally arranged in the filter chamber along the airflow direction, and each filter box comprises a support, base cloth and filter cloth.
4. The dust collecting system for removing and recovering heavy metal dust in flue gas according to claim 3, wherein: the base cloth of the filter box is latticed plain woven cloth, the filter cloth is thermoplastic non-woven cloth, and a resin adhesive layer for purifying air is arranged between the base cloth and the filter cloth.
5. The dust collecting system for removing and recovering heavy metal dust in flue gas according to claim 3, wherein: the base cloth of the filter box is latticed plain woven cloth, and the filter cloth is a PTFE composite filter membrane.
6. The dust collecting system for removing and recovering heavy metal dust in flue gas according to claim 1, which is characterized in that: and a smoke detector is arranged between the air filter and the fan, and the smoke detector and the fan are electrically connected with the control cabinet.
7. The dust collecting system for removing and recovering heavy metal dust in flue gas according to claim 1, which is characterized in that: the rotary furnace is a secondary lead rotary furnace; the control cabinet is electrically connected with the central control room in a wired or wireless mode.
CN202023190230.9U 2020-12-26 2020-12-26 Dust collecting system for removing and recovering heavy metal dust in flue gas Active CN215085840U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023190230.9U CN215085840U (en) 2020-12-26 2020-12-26 Dust collecting system for removing and recovering heavy metal dust in flue gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023190230.9U CN215085840U (en) 2020-12-26 2020-12-26 Dust collecting system for removing and recovering heavy metal dust in flue gas

Publications (1)

Publication Number Publication Date
CN215085840U true CN215085840U (en) 2021-12-10

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Application Number Title Priority Date Filing Date
CN202023190230.9U Active CN215085840U (en) 2020-12-26 2020-12-26 Dust collecting system for removing and recovering heavy metal dust in flue gas

Country Status (1)

Country Link
CN (1) CN215085840U (en)

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