CN214019842U - Dedusting treatment system for flue gas of steel slag hot stewing pool - Google Patents
Dedusting treatment system for flue gas of steel slag hot stewing pool Download PDFInfo
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- CN214019842U CN214019842U CN202022293807.2U CN202022293807U CN214019842U CN 214019842 U CN214019842 U CN 214019842U CN 202022293807 U CN202022293807 U CN 202022293807U CN 214019842 U CN214019842 U CN 214019842U
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Abstract
The utility model relates to a dust removal processing system of hot braising pond flue gas of slag, the system includes spray column, pneumatic high-efficient dust removal defroster, hydrocyclone, technology water tank, sedimentation tank, circulating pump, fan pump and defroster wash water pump, the spray column can be connected the setting with the hot braising pond of slag, and this spray column still is connected the setting with pneumatic high-efficient dust removal defroster, hydrocyclone, technology water tank. 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%.
Description
Technical Field
The utility model belongs to the technical field of the dust removal, especially, dust removal processing system of steel slag hot braising pond flue gas.
Background
The purpose of the steel slag treatment is to finish the 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 low in investment, simple to maintain and low in operating cost, and are favored by most iron and steel enterprises. In the process of treating the steel slag by the hot stewing pool method, the steel slag is loaded, slag is removed, water is pumped, a large amount of dust is generated, the dust treatment difficulty is high due to the characteristic of station layout of the hot stewing pool method, and at present, domestic steel enterprises using the hot stewing pool method do not carry out dust treatment on the link, so that the problem that the working environment of the link is severe, the dust pollution is serious, and the hot stewing pool method is the biggest scaling problem in treating the steel slag. With the release of new national environmental regulations, the unorganized emission standard is 8mg/m3How to treat the dust in the process of hot-stewing slag and reach the ultralow emission standard issued by the national ministry of environmental protection is an important difficulty faced by domestic iron and steel enterprises.
Through searching, the following two patent publications relevant to the patent application of the utility model are found:
1. a method and system (CN 110694399A) for treating steel slag flue gas, wherein high-temperature liquid steel slag generated by steel making is conveyed into a hot stewing pool, water is sprayed into the hot stewing pool to cool and pulverize the high-temperature liquid steel slag 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 flue gas, the dust-containing flue gas is dehydrated through a dehydrator to obtain dry flue gas, the dry flue gas is conveyed to a wet absorption tower through an induced draft fan, and the dry flue gas is discharged into the atmosphere after being dedusted and whitened by the wet absorption tower; the utility model discloses a handle the back with high temperature liquid slag in proper order through dusty steam, dusty flue gas and dry flue gas, discharge the atmosphere after wet process absorption tower filters at last, reach the ultralow standard of national requirement, dust concentration is < 10mg/m promptly3The 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.
By contrast, the present patent application differs essentially from the above patent publications.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a dedusting treatment system and method for the flue gas of a steel slag hot stewing pool.
In order to achieve the above object, the utility model adopts the following technical scheme:
a dedusting treatment system for flue gas in a steel slag hot stewing pool comprises a spray tower, a pneumatic high-efficiency dedusting demister, a hydrocyclone, a process water tank, a sedimentation tank, a circulating pump, a slurry discharge pump and a demister flushing water pump, wherein the spray tower can be connected with the steel slag hot stewing pool, and the spray tower is also connected with the pneumatic high-efficiency dedusting demister, the hydrocyclone and the process water tank;
the spray tower comprises a tower body, a flue gas inlet and a flue gas outlet, the tower body is arranged along the vertical direction, the flue gas inlet is communicated and arranged on the tower body, the tower body below the flue gas inlet can contain washing water, and the flue gas outlet is communicated and arranged at the top of the tower body; the flue gas inlet can be connected with dust-containing flue gas in the steel slag hot stewing pool, more than two washing sections are coaxially arranged in the tower body above the flue gas inlet from bottom to top at intervals, and the input ends of the washing sections are connected with washing water in the tower body below the flue gas inlet through a circulating pump; the pneumatic high-efficiency dust removal demister is coaxially arranged in the tower body above the uppermost washing section at intervals, a flushing pipeline is arranged at the upper end of the demister and is connected with the output end of a process water tank through a demister flushing water pump, water in the flushing pipeline can flush the pneumatic high-efficiency dust removal demister, and the process water tank can contain flushing water;
the input end of the hydrocyclone is connected with the middle-lower part in the tower body below the flue gas inlet through a slurry discharge pump, the hydrocyclone can be used for carrying out solid-liquid separation on a solution, the output end of the hydrocyclone comprises an overflow output end and an underflow output end, the overflow output end is connected with the middle-upper part in the tower body below the flue gas inlet, the underflow output end is connected with the input end of a sedimentation tank, the output end of the sedimentation tank comprises a supernatant output end, the supernatant output end is connected with the input end of a process water tank, and the input end of the process water tank can also be connected with a plant process water phase.
Moreover, the spray tower is a pneumatic high-efficiency dedusting and demisting spray tower.
And the spray tower is connected with the steel slag hot stewing pool through an induced draft fan.
And a clean water pump is arranged in the sedimentation tank, and the clean water pump can convey the supernatant to the spray tower for cyclic use.
And the flushing water contained in the process water tank is tap water.
The method for treating the flue gas of the steel slag hot stewing pool by using the dedusting treatment system for the flue gas of the steel slag hot stewing pool comprises the following specific steps of:
the method comprises the steps that dust-containing flue gas generated after a slag stewing pool is subjected to water spraying and cooling enters a spray tower, and clean water at the bottom end of the tower is conveyed to a water washing section through a circulating pump to spray and wash the dust-containing flue gas;
secondly, the flue gas after washing and dedusting is subjected to pneumatic high-efficiency dedusting demister to further remove dust and fog;
thirdly, conveying the dust-containing solution to a hydrocyclone by a slurry discharge pump, carrying out solid-liquid separation on the solution by the hydrocyclone, returning the top flow to the spray tower, and feeding the bottom flow into a sedimentation tank;
fourthly, conveying the supernatant in the settling pond into a spray tower for recycling;
fifthly, conveying the water in the process water tank to the upper end of the demister through a demister washing water pump, washing the demister through a washing pipeline and in the spray tower.
And the process water tank washes the demister and replenishes water to the spray tower.
The utility model discloses the advantage and the effect that gain are:
1. 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%.
2. The utility model discloses the system adopts the cigarette tower unification, has saved investment and area effectively.
3. The utility model discloses the system adopts the 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 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 method adopts wet dust removal and pneumatic high-efficient dust removal defogging combination technique, and dust removal effect is good, and the working costs is low, and safety ring protects no secondary pollution, makes the dirty gas emission < 10mg/m3And the emission standard required by the state is achieved.
Drawings
Fig. 1 is a schematic view of a structure connection of the dust removal processing 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 structure, connection relation and the like which are not described in detail in the utility model can be understood as the conventional technical means in the field; the methods used in the present invention are conventional methods in the art unless otherwise specified.
A dedusting treatment system for flue gas in a steel slag hot stewing pool is shown in figure 1 and comprises a spray tower, a pneumatic high-efficiency dedusting demister 2, a hydrocyclone 11, a process water tank 10, a sedimentation tank 8, a circulating pump 6, a slurry discharge pump 7 and a demister washing water pump 9, wherein the spray tower can be connected with the steel slag hot stewing pool 5, and the spray tower is also connected with the pneumatic high-efficiency dedusting demister, the hydrocyclone and the process water tank;
the spray tower comprises a tower body 3, a flue gas inlet 12 and a flue gas outlet 1, wherein the tower body is arranged along the vertical direction, the flue gas inlet is communicated and arranged on the tower body, the tower body below the flue gas inlet can contain water for washing, and the flue gas outlet is communicated and arranged at the top of the tower body; the flue gas inlet can be connected with dust-containing flue gas in the steel slag hot stewing pool, more than two washing sections 4 are coaxially arranged in the tower body above the flue gas inlet from bottom to top at intervals, and the input ends of the washing sections are connected with washing water in the tower body below the flue gas inlet through a circulating pump; the pneumatic high-efficiency dust removal demister is coaxially arranged in the tower body above the uppermost washing section at intervals, a flushing pipeline is arranged at the upper end of the demister and is connected with the output end of a process water tank through a demister flushing water pump, water in the flushing pipeline can flush the pneumatic high-efficiency dust removal demister, and the process water tank can contain flushing water;
the input end of the hydrocyclone is connected with the middle-lower part in the tower body below the flue gas inlet through a slurry discharge pump, the hydrocyclone can be used for carrying out solid-liquid separation on a solution, the output end of the hydrocyclone comprises an overflow output end and an underflow output end, the overflow output end is connected with the middle-upper part in the tower body below the flue gas inlet, the underflow output end is connected with the input end of a sedimentation tank, the output end of the sedimentation tank comprises a supernatant output end, the supernatant output end is connected with the input end of a process water tank, and the input end of the process water tank can also be connected with a plant process water phase.
In this embodiment, the spray tower is a pneumatic high-efficiency dust-removing and mist-removing spray tower.
In this embodiment, the spray tower is connected with the steel slag hot stewing pond through the induced draft fan.
In this embodiment, be equipped with the clarified water pump in the sedimentation tank, the clarified water pump can carry the supernatant to spray column internal recycle.
In this embodiment, the flushing water contained in the process tank is tap water.
The method for treating the flue gas of the steel slag hot stewing pool by using the dedusting treatment system for the flue gas of the steel slag hot stewing pool comprises the following specific steps of:
(1) the dust-containing flue gas generated after the slag stewing pool is cooled by water spraying enters a spray tower, and clear water at the bottom end of the tower is conveyed to a water washing section through a circulating pump to spray and wash the dust-containing flue gas;
(2) the flue gas after washing and dedusting is subjected to pneumatic high-efficiency dedusting demister to further remove dust and fog;
(3) the slurry discharge pump conveys the dust-containing solution to a hydrocyclone, the hydrocyclone carries out solid-liquid separation on the solution, the top flow returns to the spray tower, and the bottom flow enters a sedimentation tank;
(4) conveying the supernatant in the sedimentation tank into a spray tower for recycling;
(5) the water in the process water tank is delivered to a washing pipeline at the upper end of the demister and a spray tower through a demister washing water pump, and the washing pipeline washes the demister.
Preferably, the process water tank flushes the demister and replenishes water to the spray tower.
The utility model discloses a theory of operation can be as follows:
the utility model discloses dust removal processing method of hot braising pond flue gas of slag carries the high temperature liquid slag that steelmaking (converter, electric stove) in-process produced in the hot braising pond, and water injection is with the liquid slag cooling of high temperature in the hot braising pond, and the dusty steam that this process produced passes through the pipeline and carries to the spray column through the draught fan, establishes two-layer washing section and sprays the washing to dusty steam in the spray column, and upper portion is equipped with pneumatic high-efficient dust removal defroster, further removes dust and defogging to the flue gas. And when the concentration of slurry and dust in the tower is higher, the solution is conveyed to the hydrocyclone by the drainage pump, the top of the hydrocyclone flows back to the spray tower, and the bottom flows into the sedimentation tank. The sedimentation tank is provided with a clean water pump, the clean water pump conveys supernatant to the spray tower for recycling, and the process water tank washes the demister and replenishes water for the spray tower through a demister washing water pump.
The method adopts the combined technology of wet dust removal and pneumatic high-efficiency dust removal and demisting to ensure that the discharge of dust-containing gas is less than 10mg/m3And the emission standard required by the state is achieved. The utility model discloses dust removal effect is good, and the working costs is low, and safety ring protects no secondary pollution.
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 (5)
1. The utility model provides a dust removal processing system of steel slag hot braising pond flue gas which characterized in that: the system comprises a spray tower, a pneumatic high-efficiency dust and mist removal device, a hydraulic cyclone, a process water tank, a sedimentation tank, a circulating pump, a slurry discharge pump and a mist removal flushing water pump, wherein the spray tower can be connected with the steel slag hot stewing tank, and is also connected with the pneumatic high-efficiency dust and mist removal device, the hydraulic cyclone and the process water tank;
the spray tower comprises a tower body, a flue gas inlet and a flue gas outlet, the tower body is arranged along the vertical direction, the flue gas inlet is communicated and arranged on the tower body, the tower body below the flue gas inlet can contain washing water, and the flue gas outlet is communicated and arranged at the top of the tower body; the flue gas inlet can be connected with dust-containing flue gas in the steel slag hot stewing pool, more than two washing sections are coaxially arranged in the tower body above the flue gas inlet from bottom to top at intervals, and the input ends of the washing sections are connected with washing water in the tower body below the flue gas inlet through a circulating pump; the pneumatic high-efficiency dust removal demister is coaxially arranged in the tower body above the uppermost washing section at intervals, a flushing pipeline is arranged at the upper end of the demister and is connected with the output end of a process water tank through a demister flushing water pump, water in the flushing pipeline can flush the pneumatic high-efficiency dust removal demister, and the process water tank can contain flushing water;
the input end of the hydrocyclone is connected with the middle-lower part in the tower body below the flue gas inlet through a slurry discharge pump, the hydrocyclone can be used for carrying out solid-liquid separation on a solution, the output end of the hydrocyclone comprises an overflow output end and an underflow output end, the overflow output end is connected with the middle-upper part in the tower body below the flue gas inlet, the underflow output end is connected with the input end of a sedimentation tank, the output end of the sedimentation tank comprises a supernatant output end, the supernatant output end is connected with the input end of a process water tank, and the input end of the process water tank can also be connected with a plant process water phase.
2. The system for dedusting and treating the flue gas of the steel slag hot stewing pool according to the claim 1 is characterized in that: the spray tower is a pneumatic high-efficiency dust-removing demisting spray tower.
3. The system for dedusting and treating the flue gas of the steel slag hot stewing pool according to the claim 1 is characterized in that: the spray tower is connected with the steel slag hot stewing pool through a draught fan.
4. The system for dedusting and treating the flue gas of the steel slag hot stewing pool according to the claim 1 is characterized in that: and a clear water pump is arranged in the sedimentation tank and can convey the supernatant to the spray tower for cyclic use.
5. The system for dedusting and processing the flue gas of the steel slag hot stewing pool according to any one of claims 1 to 4, is characterized in that: the flushing water contained in the process water tank is tap water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022293807.2U CN214019842U (en) | 2020-10-15 | 2020-10-15 | Dedusting treatment system for flue gas of steel slag hot stewing pool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022293807.2U CN214019842U (en) | 2020-10-15 | 2020-10-15 | Dedusting treatment system for flue gas of steel slag hot stewing pool |
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| CN214019842U true CN214019842U (en) | 2021-08-24 |
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| CN202022293807.2U Active CN214019842U (en) | 2020-10-15 | 2020-10-15 | Dedusting treatment system for flue gas of steel slag hot stewing pool |
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