CN216418769U - Slag dumping and slag fishing process raise dust treatment system for steel slag hot-stewing pool - Google Patents
Slag dumping and slag fishing process raise dust treatment system for steel slag hot-stewing pool Download PDFInfo
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- CN216418769U CN216418769U CN202122484977.3U CN202122484977U CN216418769U CN 216418769 U CN216418769 U CN 216418769U CN 202122484977 U CN202122484977 U CN 202122484977U CN 216418769 U CN216418769 U CN 216418769U
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The utility model discloses a slag hot stewing pond deslagging and slag salvaging process raise dust processing system, the system is including stewing pond, hair-dryer, suction hood, draught fan, wet process gas wash tower, pneumatic high-efficient dust removal defroster, circulating water pump, fan pump, plate and frame filter press, and stewing pond covers and is connected and is provided with the suction hood, and the relative one side interval of the input of suction hood is provided with the hair-dryer, and the output of suction hood is connected the setting through the flue gas entry of draught fan with the wet process gas wash tower, and the coaxial pneumatic high-efficient dust removal defroster that sets up on the tower body between exhanst gas outlet, the washing layer. The utility model discloses the system breaks the limitation that current slag stewing pond removed dust, and the raise dust of dragging for the production of sediment process to slag stewing pond deslagging is collected and is handled, adopts "blow dirt + suction hood" and wet dedusting technical combination, and it is good to collect raise dust and treatment effect, and investment cost is low, and the working costs is low, makes outer row of dust < 10mg Nm3, satisfies the latest environmental protection emission requirement of country.
Description
Technical Field
The utility model belongs to the technical field of the stewing pond dust removal, especially, a slag deslagging and slag dragging process raise dust treatment system of steel slag hot stewing pond.
Background
The purpose of the steel slag treatment is to finish cooling, pulverization and magnetic separation of high-temperature liquid steel slag generated in the steel-making (converter and electric furnace) process. The mainstream process for treating the steel slag of domestic iron and steel enterprises comprises the following steps: the hot splashing method, the hot stewing pool method, the rolling hot stewing method, the roller method and the air quenching method are adopted for treating the hot steel slag in most domestic steel enterprises, wherein the hot stewing pool method has the advantages of small investment, simple maintenance and low operating cost. The hot stewing pool method can generate a large amount of dust in the process of pouring and fishing out the steel slag, because of the characteristics of the structure of the hot stewing pool and the limitation of the operation in the process of deslagging and fishing out the slag, the collection and treatment difficulty of the dust is larger, and at present, part of steel enterprises adopting the hot stewing method in China have treated the dust generated in the deslagging process, but the dust generated in the deslagging and fishing out the slag is not treated. Iron and steel enterprises using the hot stewing pond method do not carry out dust treatment on the link, so that the dust content in a stewing pond factory building exceeds the standard, the working environment is severe, and the problem which is difficult to solve by a steel slag hot stewing technology for many years is solved. At the present stage, the national environmental protection requirement is increasingly strict, and the emission standard of the unorganized dust is 8mg/m according to the latest environmental protection requirement3How to collect and treat the dust generated by the steel slag in the deslagging and slag-dragging process is a problem which needs to be solved urgently in domestic steel enterprises.
Through searching, the following patent publications relevant to the patent application of the utility model are found:
1. steel slag flue gas treatment methodThe method comprises the steps that (CN 110694399A), high-temperature liquid steel slag generated in steel making is conveyed into a hot stewing pool, water is sprayed into the hot stewing pool to enable the high-temperature liquid steel slag to be cooled and pulverized to obtain dust-containing steam, the dust-containing steam is conveyed to a spray tower through a pipe network, the dust-containing steam is sprayed in the spray tower to obtain dust-containing smoke, the dust-containing smoke is dehydrated through a dehydrator to obtain dry smoke, the dry smoke is conveyed to a wet absorption tower through a draught fan, and the dry smoke is discharged into the atmosphere after being dedusted and whitened by the wet absorption tower; the invention achieves the national ultra-low standard that the dust concentration is less than 10mg/m by sequentially treating the high-temperature liquid steel slag, then passing the treated high-temperature liquid steel slag through dust-containing steam, dust-containing flue gas and dry flue gas, finally filtering the treated high-temperature liquid steel slag through a wet absorption tower and then discharging the filtered high-temperature liquid steel slag into the atmosphere3The method meets the requirement of deep purification of the steel slag waste gas, and has the advantages of good dust removal effect, low cost, safety, environmental protection and no pollution.
2. The utility model provides a dust pelletizing system (CN 208018351U) for hot braising slag is handled, includes the entrapment cover, flue gas dewatering defogging device, flue gas heating device, dust collector, air exhauster and the emission chimney that connect gradually through the tuber pipe, just still through the supplementary grey device of scribbling in advance of pipe connection filter material on the tuber pipe between flue gas heating device and the dust collector, tuber pipe and dust collector all set up thermal-insulated heat preservation, a dust pelletizing system for hot braising slag is handled prevents that the flue gas dewfall deliquesces hardens, blocks up tuber pipe and dust removal filter material, causes the too early inefficacy of dust pelletizing system, extension dust pelletizing system's life.
Through the contrast, the patent application of the utility model discloses link that handles the braised sediment dust is all inequality with above-mentioned patent publication document, consequently has great essence difference.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a dust treatment system for the slag dumping and dragging process of a steel slag hot stewing pool.
In order to achieve the above object, the utility model adopts the following technical scheme:
a dust treatment system in the slag dumping and dragging process of a steel slag hot stewing pool comprises a stewing pool, a blower, a dust hood, a draught fan, a wet dust removing tower, a pneumatic high-efficiency dust removing demister, a circulating water pump, a slurry discharging pump and a plate and frame filter press, the top of the slag stewing pool is movably connected with a slag stewing pool cover, the slag stewing pool cover is connected with a dust hood, one side opposite to the input end of the dust hood is provided with a blower at intervals, the output end of the dust hood is connected with a flue gas inlet of a wet dust removal tower through a draught fan, the wet dust removal tower comprises a tower body, a flue gas outlet, a water washing layer, a flue gas inlet, a dust removal section and a slurry storage tank, the tower body is sequentially and coaxially provided with a flue gas outlet, a water washing layer, a flue gas inlet, a dust removal section and a slurry storage tank at intervals from top to bottom, a pneumatic high-efficiency dust and mist removing device is coaxially arranged on the tower body between the flue gas outlet and the water washing layer;
the input end of the circulating water pump is connected with the pulp storage tank, the output end of the circulating water pump is connected with the input end of the water washing layer, and the output end of the water washing layer can downwards output dedusting cleaning water;
the slurry storage pool is connected with the input end of the plate-and-frame filter press through a slurry discharge pump, the output end of the plate-and-frame filter press comprises a mud cake output end and a clean water output end, and the clean water output end is connected with the slurry storage pool.
Further, the system further comprises a demister flushing system, a demister flushing pump and a process water tank, wherein the demister flushing system is arranged in the tower body between the pneumatic high-efficiency dust removal demister and the flue gas outlet, the process water tank is connected with the demister flushing system through the demister flushing pump, and the demister flushing system can flush the pneumatic high-efficiency dust removal demister.
The utility model discloses the advantage and the effect that gain are:
1. the utility model discloses the system breaks the limitation that current slag stewing pond removed dust, and the raise dust of dragging for the sediment process to slag stewing pond deslagging is collected and is handled, adopts "blow dirt + suction hood" and wet dedusting technology combination, and it is good to collect raise dust and treatment effect, and investment cost is low, and the working costs is low, makes outer row's dust < 10mg Nm3, satisfies the latest environmental protection emission requirement of country.
2. The utility model discloses the dust collection efficiency of system is high, and particle clearance to the particle diameter at 1um ~ 5um is more than 90%, and particle clearance to 10um is at 100%.
3. The utility model discloses a pneumatic high-efficient dust removal defogging technique, add the cyclone plate of establishing in the multistage two pneumatic whirl dust removal defroster section of thick bamboo and make the flue gas get up at cyclone section of thick bamboo internal rotation, thereby form the double-phase violent rotation of gas-liquid and the disturbance makes tiny liquid drop in the flue gas in cyclone top, tiny dust particle, tiny particulate matter such as aerosol collides the reunion of each other and gathers into big liquid drop, under the pneumatic cyclone structure effect again, make the outside centrifugal motion of flue gas, the big liquid drop that the polymerization formed collides with cyclone section of thick bamboo wall, and catch the absorption by cyclone section of thick bamboo wall liquid film, the periodic flushing through the sparge water realizes high-efficient dust removal defogging.
4. The utility model discloses the system adopts the cigarette tower unification, has saved investment and area effectively.
5. The high temperature liquid slag that steelmaking (converter, electric stove) in-process produced utilizes the crane to pack into (or fish out) the slag stewing pond, and this process can produce a large amount of raise dusts, the utility model discloses under hair-dryer and suction hood dual function (only depend on the suction hood to be difficult to suck away the raise dusts completely), the raise dusts gets into the suction hood and gets into the gas wash tower through the flue, establishes (like one deck) washing spray layer in the gas wash tower, carries out preliminary washing to the flue gas, and gas wash tower upper portion is equipped with pneumatic high-efficient dust removal defroster, removes dust to the further high efficiency of flue gas. The dedusting tower is provided with a slurry discharging pump, when the dust concentration in the water storage pool at the lower part of the dedusting tower is higher, the slurry discharging pump conveys the dust-containing concentrated solution to the plate-and-frame filter press, and clear water generated after the concentrated solution passes through the plate-and-frame filter press returns to the slurry storage pool of the dedusting tower, so that the mud and the dust are transported outside. The device is provided with a process water tank and a flushing water pump, and the pneumatic high-efficiency dust removal demister at the upper part of the dust removal tower is flushed regularly. The utility model discloses a "blow dirt + dust absorption" technique and wet dedusting technique combination make the raise dust effectively collect and handle, reach the emission standard that the country required. The utility model discloses it is effectual to collect and handle the raise dust, and the working costs is low, and safety ring protects no secondary pollution.
Drawings
Fig. l is a schematic view of a structural connection of the system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
The utility model discloses in the raw materials that use, if do not have the special explanation, be conventional commercial product, the utility model discloses in the method that uses, if do not have the special explanation, be the conventional method in this field, the used each material quality of the utility model is conventional use quality. The structures, connection relations, etc. not described in detail in the present invention can be understood as conventional technical means in the art.
The utility model provides a slag-dumping and dragging for sediment process raise dust processing system in slag hot stewing pond, as shown in figure 1, the system includes stewing pond 4, hair-dryer 1, suction hood 3, draught fan 5, wet process gas wash tower, pneumatic high-efficient dust removal defroster 73, circulating water pump 6, fan pump 8, filter press 9, the top activity in stewing pond is connected and is set up stewing pond lid 2, and stewing pond is covered to be connected and is provided with the suction hood, and the relative one side interval of suction hood's input is provided with the hair-dryer, and the output of suction hood is connected the setting through the draught fan with the flue gas entry of wet process gas wash tower, and this wet process gas wash tower includes tower body 72, exhanst gas outlet 71, washing layer 74, flue gas entry 75, dust removal section 76 and slurry storage tank 77, tower body top-down is provided with exhanst gas outlet, washing layer, flue gas entry, dust removal section and slurry storage tank in proper order and at the same axial interval, the flue gas outlet, A pneumatic high-efficiency dust and mist removing device is coaxially arranged on the tower body between the water washing layers;
the input end of the circulating water pump is connected with the pulp storage tank, the output end of the circulating water pump is connected with the input end of the water washing layer, and the output end of the water washing layer can downwards output dedusting cleaning water;
the slurry storage pool is connected with the input end of the plate-and-frame filter press through a slurry discharge pump, the output end of the plate-and-frame filter press comprises a mud cake output end 92 and a clean water output end 91, and the clean water output end is connected with the slurry storage pool.
This system is including smoldering cinder pond, hair-dryer, suction hood, draught fan, wet process gas wash tower, pneumatic high-efficient dust removal defroster, circulating water pump, fan pump, plate and frame filter press, and the raise dust is collected through hair-dryer + suction hood dual function, and the wet process gas wash tower removes dust for washing and pneumatic high-efficient dust removal defroster, utilizes plate and frame filter press to carry out desorption aquatic dust.
In this embodiment, the system still includes defroster rinse-system (not numbered in the figure), defroster wash water pump 10 and process water tank 11, the defroster rinse-system sets up in the tower body between pneumatic high-efficient dust removal defroster, the exhanst gas outlet, the process water tank is connected the setting through defroster wash water pump and defroster rinse-system, and defroster rinse-system can carry out the washing operation to pneumatic high-efficient dust removal defroster.
In this embodiment, the blowers are provided in two.
A method for treating dust in the slag dumping and dragging process of a steel slag hot stewing pool by using the treatment system comprises the following steps:
(1) high-temperature liquid steel slag generated in the steel-making process (such as a converter and an electric furnace) is put into or taken out of a slag stewing pool by using a crane, a large amount of raised dust is generated in the process, and the dust is blown towards the dust hood by using a blower;
(2) the dust generated in the slag dumping and slag salvaging processes of the slag stewing pool is conveyed to the wet dust removal tower through a (flue and) a draught fan under the dual functions of a blower and a dust hood;
(3) a washing layer is arranged in the wet dust removal tower, dust removal cleaning water in a water storage tank below the dust removal section is conveyed to the washing layer by a circulating water pump, and the washing layer is used for washing and removing dust from the dust-containing flue gas;
(4) after primary dust removal through water washing, the flue gas enters a pneumatic high-efficiency dust removal demister at the upper part of a dust removal tower, dust-containing flue gas is further efficiently removed, and the treated flue gas is discharged from a flue gas outlet at the top of the tower;
(5) along with continuous circulation, the dust removal cleaning water washes dust-containing flue gas, dust in the water storage pool is enriched, after certain concentration is reached (which can be automatically determined according to operation experience), the dust-containing concentrated solution is conveyed to a plate-and-frame filter press through a slurry discharge pump, the plate-and-frame filter press performs solid-liquid separation on the concentrated solution, a filter cake is produced and transported outwards, and the clean water is recycled to the wet method dust removal tower.
Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore, the scope of the invention is not limited to the embodiments disclosed.
Claims (2)
1. The utility model provides a slag-dumping and dragging process raise dust processing system in steel slag hot stewing pond which characterized in that: the system comprises a slag stewing pool, a blower, a dust hood, an induced draft fan, a wet dedusting tower, a pneumatic high-efficiency dedusting demister, a circulating water pump, a slurry discharge pump and a plate-and-frame filter press, wherein the top of the slag stewing pool is movably connected with a slag stewing pool cover which is connected with the dust hood, the blower is arranged on one side opposite to the input end of the dust hood at intervals, the output end of the dust hood is connected with a flue gas inlet of the wet dedusting tower through the induced draft fan, the wet dedusting tower comprises a tower body, a flue gas outlet, a washing layer, a flue gas inlet, a dedusting section and a slurry storage pool, the tower body is sequentially and coaxially provided with the flue gas outlet, the washing layer, the flue gas inlet, the dedusting section and the slurry storage pool at intervals from top to bottom, and the pneumatic high-efficiency dedusting demister is coaxially arranged on the tower body between the flue gas outlet and the washing layer;
the input end of the circulating water pump is connected with the pulp storage tank, the output end of the circulating water pump is connected with the input end of the water washing layer, and the output end of the water washing layer can downwards output dedusting cleaning water;
the slurry storage pool is connected with the input end of the plate-and-frame filter press through a slurry discharge pump, the output end of the plate-and-frame filter press comprises a mud cake output end and a clean water output end, and the clean water output end is connected with the slurry storage pool.
2. The dust treatment system in the slag dumping and dragging process of the steel slag hot stewing pond according to claim 1 is characterized in that: the system further comprises a demister flushing system, a demister flushing pump and a process water tank, wherein the demister flushing system is arranged in the tower body between the pneumatic high-efficiency dust removal demister and the flue gas outlet, the process water tank is connected with the demister flushing system through the demister flushing pump, and the demister flushing system can flush the pneumatic high-efficiency dust removal demister.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122484977.3U CN216418769U (en) | 2021-10-15 | 2021-10-15 | Slag dumping and slag fishing process raise dust treatment system for steel slag hot-stewing pool |
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| CN202122484977.3U CN216418769U (en) | 2021-10-15 | 2021-10-15 | Slag dumping and slag fishing process raise dust treatment system for steel slag hot-stewing pool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893627A (en) * | 2021-10-15 | 2022-01-07 | 航天环境工程有限公司 | Dust treatment system and method in slag dumping and dragging process of steel slag hot-stewing pool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113893627A (en) * | 2021-10-15 | 2022-01-07 | 航天环境工程有限公司 | Dust treatment system and method in slag dumping and dragging process of steel slag hot-stewing pool |
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