CN202511577U - System for drying cold bonded pellet - Google Patents
System for drying cold bonded pellet Download PDFInfo
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- CN202511577U CN202511577U CN2012200848360U CN201220084836U CN202511577U CN 202511577 U CN202511577 U CN 202511577U CN 2012200848360 U CN2012200848360 U CN 2012200848360U CN 201220084836 U CN201220084836 U CN 201220084836U CN 202511577 U CN202511577 U CN 202511577U
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- flue gas
- hot flue
- drying
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- deduster
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Abstract
The utility model discloses a system for drying a cold bonded pellet, which is characterized in that hot flue gas generated by a hot flue gas source enters a circular drying system through a hot flue gas inlet manifold and generates a drying effect; flue gas of a first circular air pipe is returned to the hot flue gas source under the action of a first induced draught fan as an air source to supplement heat and circularly use; and flue gas of a second circular air pipe is removed by a waste flue gas treatment system. The system has the beneficial effects that by adopting a low-temperature and high-air speed quick drying method, the requirement of drying the air source is reduced, the discharge temperature in the dried flue gas is lower than about 80 DEG C, and the use efficiency of the flue gas is improved; and the system has the advantages of good drying effect, high drying efficiency, good product quality, simple structure, convenience in maintenance, good exchangeability, saved cost, good energy resource utilization and environmental friendliness.
Description
Technical field
The utility model relates to a kind of drying system, particularly a kind of system that is used to dry cold bound pellet.
Background technology
The baking operation of cold bound pellet is to get into the preceding working procedure that rotary hearth furnace carries out direct reduction reactor.Because the moisture after the treated moulding of cold bound pellet is about 10%, belongs to wet bulb, if wet bulb get into rotary hearth furnace directly reduction have following problem:
The wet bulb physical strength is not enough, is easy to generate plastic deformation, and powdered is more, influences output;
Cold bound pellet receives the influence of " break temperature " (general 400～450 ℃), and it is cracked or " explosion " at warm-up phase (preheat temperature is higher than 900 ℃), and powder is more, influences the atmosphere of output and rotary hearth furnace;
Therefore, cold bound pellet must carry out drying before getting into rotary hearth furnace, and moisture is reached below 2%, satisfies technological requirement.
The oven dry of cold bound pellet mainly is a gas drying, and thermal source is the hot flue gas of uniform temperature and humidity, the moisture content of pelletizing is removed the purpose that reaches dry through hot flue gas.
Through theoretical research and continuous Test Summary, the cold bound pellet oven dry need meet the following conditions:
Hot flue gas has certain temperature and humidity, but humidity must be lower than the equilibrium humidity of pelletizing, has only when smoke moisture is lower than the pelletizing equilibrium humidity, and moisture content could get into hot flue gas through pelletizing;
Dry run is divided into two kinds of situation of surface gasification control and diffusion inside control, shows with test that after deliberation cold bound pellet belongs to the diffusion inside control mode, so should (0.9～1.5m/m2s) dries with big wind speed in drying course;
Consider phosphorus content (12%～20%) and the burst temperature of pelletizing in the cold bound pellet, so flue-gas temperature should adopt (250～400 ℃).
According to some above condition, problem such as the system and method for at present cold bound pellet being dried can't meet the demands, and exists long, the hot exhaust gas volumn consumption of drying time excessive, and production efficiency is low.
So, need a kind of new technical scheme to address the above problem.
The utility model content
To above-mentioned existing in prior technology problem and shortage, the purpose of the utility model provides a kind of system that is used to dry cold bound pellet, and this system has good drying effect, and drying efficiency is high, and good product quality is simple in structure, be convenient to safeguard; Commutativity is good, cost savings; Using energy source is good, eco-friendly advantage.
Be to realize that the system that above-mentioned purpose, the utility model are used to dry cold bound pellet can adopt following technical scheme:
A kind of system that is used to dry cold bound pellet comprises hot flue gas source of the gas, the circulation air feed system that is connected with hot flue gas source of the gas, the dryer equipment that is connected with the circulation air feed system and useless smoke processing system;
Said circulation air feed system comprises the hot flue gas inlet manifold who is connected with hot flue gas source of the gas, the first circulation airduct that is connected with hot flue gas inlet manifold, first deduster that is connected with the first circulation airduct, simultaneously connect first air-introduced machine of first deduster and hot flue gas source of the gas, the second circulation airduct that is connected with hot flue gas inlet manifold equally, second deduster that is connected with the second circulation airduct, second air-introduced machine of connection second deduster, the header pipe who is connected with second air-introduced machine, from the header pipe in dryer equipment both sides extension and a pair of air-supply that is connected with dryer equipment respectively be in charge of; Said dryer equipment comprises high temperature section and low-temperature zone, and said air-supply is in charge of (4-2-5) and is connected with low-temperature zone; Said low-temperature zone is connected with useless smoke processing system.
The utility model is compared with prior art: because the utility model adopts the flash baking method of low temperature, big wind speed; Reduced the requirement of oven dry source of the gas, exhaust temperature is low about 80 ℃ in the flue gas after oven dry, has improved the service efficiency of flue gas; Has good drying effect; Drying efficiency is high, and good product quality is simple in structure, be convenient to safeguard; Commutativity is good, cost savings; Using energy source is good, eco-friendly advantage.
Description of drawings
Fig. 1 is used to dry the structural representation of the system of cold bound pellet for the utility model.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment; Further illustrate the utility model; Should understand the following specific embodiment only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.
Please combine shown in Figure 1; The utility model discloses a kind of system that is used to dry cold bound pellet, comprises hot flue gas source of the gas 1, the circulation air feed system that is connected with hot flue gas source of the gas 1, the dryer equipment 3-1 that is connected with the circulation air feed system and useless smoke processing system.Wherein, said hot flue gas source of the gas comprises temperature at 250～400 ℃ of flue gas kiln gas, waste heat flue gas or other thermal source flue gases, owing to adopt big wind speed (0.9～1.5m/m2s); Exhaust gas volumn is big; Humidity requirement is not high in the flue gas, and (30～80g/Kg), pressure is not done requirement to humidity.The circulation air feed system is established pressure detecting, temperature detection, the some points of flow detection.
Said circulation air feed system comprises hot flue gas inlet manifold 2-1, the 2-2 that is connected with hot flue gas source of the gas 1, the first circulation airduct 4-1-1 that is connected with hot flue gas inlet manifold 2-1,2-2, the first deduster 4-1-2 that is connected with the first circulation airduct 4-1-1, simultaneously connect the first air-introduced machine 4-1-3 of the first deduster 4-1-2 and hot flue gas source of the gas 1, the second circulation airduct 4-2-1 that is connected with hot flue gas inlet manifold 2-1,2-2 equally, the second deduster 4-2-2 that is connected with the second circulation airduct 4-2-1, the second air-introduced machine 4-2-3 of the connection second deduster 4-2-2, the header pipe 4-2-4 that is connected with the second air-introduced machine 4-2-3, from header pipe 4-2-4 in dryer equipment 3-1 both sides extension and a pair of air-supply that is connected with dryer equipment 3-1 respectively be in charge of 4-2-5,4-2-6; Said dryer equipment 3-1 comprises high temperature section 5-2 and low-temperature zone 5-1, and 4-2-5 is in charge of in said air-supply, 4-2-6 is connected with low-temperature zone 5-1; Said low-temperature zone 5-1 is connected with useless smoke processing system.Said useless smoke processing system comprises waste heat flue gas house steward 5-1,5-2, the deduster 5-3 that is connected with said waste heat flue gas house steward 5-1,5-2, the dedusting fan 5-4 that is connected with deduster 5-3 and the chimney 5-5 that connects dedusting fan 5-4.Be coated with lightweight refracrory in said flue gas inlet manifold 2-1, the 2-2.The skin of the said first circulation airduct 4-1-1 and the second circulation airduct 4-2-1,4-2-4 is enclosed with refractory fibre.In this embodiment, said dryer adopts grate type drying machine, and the oven dry area can be up to 0.8～1t/m2, and material thickness is 50～250mm; Dryer speed is that frequency conversion is adjustable, 1.2～2.14m/min; Establish some temperature, pressure detecting point in the dryer; Establish some temperature, pressure detecting point in the dryer; And the anti-material of spraying lightweight in the dryer is to guarantee the quality and the life-span of dryer.In this embodiment, to establish deduster before the air-introduced machine and can reduce the big dust particle in the flue gas, the blade of protection air-introduced machine improves service life.
Use the above-mentioned cold bound pellet furnace drying method that is used to dry the system of cold bound pellet to be: the hot flue gas that hot flue gas source of the gas 1 produces gets into the circulation drying system and produces drying effect through hot flue gas inlet manifold 2-1,2-2, cold bound pellet is moved and in moving process, receives the need of stoving of hot flue gas to high temperature section 5-2 from low-temperature zone 5-1; The flue gas of the first circulation airduct 4-1-1 returns hot gas source 1 through the effect of the first air-introduced machine 4-1-3 and recycles as the source of the gas additional heat; The flue gas of the second circulation airduct 4-2-1 is got rid of through useless smoke processing system.
The utility model adopts the flash baking method of low temperature, big wind speed, has reduced the requirement of oven dry source of the gas, and exhaust temperature is low about 80 ℃ in the flue gas after oven dry; Improved the service efficiency of flue gas, had good drying effect, drying efficiency is high; Good product quality, simple in structure, be convenient to safeguard; Commutativity is good, cost savings; Using energy source is good, eco-friendly advantage.
Claims (1)
1. system that is used to dry cold bound pellet is characterized in that: comprise hot flue gas source of the gas (1), the circulation air feed system that is connected with hot flue gas source of the gas (1), the dryer equipment (3-1) and the useless smoke processing system that are connected with the circulation air feed system;
Said circulation air feed system comprises the hot flue gas inlet manifold (2-1,2-2) who is connected with hot flue gas source of the gas (1), the first circulation airduct (4-1-1) that is connected with hot flue gas inlet manifold (2-1,2-2), first deduster (4-1-2) that is connected with the first circulation airduct (4-1-1), simultaneously connect first air-introduced machine (4-1-3) of first deduster (4-1-2) and hot flue gas source of the gas (1), the second circulation airduct (4-2-1) that is connected with hot flue gas inlet manifold (2-1,2-2) equally, second deduster (4-2-2) that is connected with the second circulation airduct (4-2-1), second air-introduced machine (4-2-3) of connection second deduster (4-2-2), the header pipe (4-2-4) who is connected with second air-introduced machine (4-2-3), from header pipe (4-2-4) in dryer equipment (3-1) both sides extension and a pair of air-supply that is connected with dryer equipment (3-1) respectively be in charge of (4-2-5,4-2-6); Said dryer equipment (3-1) comprises high temperature section (5-2) and low-temperature zone (5-1), and said air-supply is in charge of (4-2-5,4-2-6) and is connected with low-temperature zone (5-1); Said low-temperature zone (5-1) is connected with useless smoke processing system;
Be coated with lightweight refracrory in the said flue gas inlet manifold (2-1,2-2);
The skin of said first circulation airduct (4-1-1) and the second circulation airduct (4-2-1,4-2-4) is enclosed with refractory fibre;
Said useless smoke processing system comprises waste heat flue gas house steward (5-1,5-2), the deduster (5-3) that is connected with said waste heat flue gas house steward (5-1,5-2), the dedusting fan (5-4) that is connected with deduster (5-3) and the chimney (5-5) that connects dedusting fan (5-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200848360U CN202511577U (en) | 2012-03-08 | 2012-03-08 | System for drying cold bonded pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200848360U CN202511577U (en) | 2012-03-08 | 2012-03-08 | System for drying cold bonded pellet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202511577U true CN202511577U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200848360U Expired - Fee Related CN202511577U (en) | 2012-03-08 | 2012-03-08 | System for drying cold bonded pellet |
Country Status (1)
| Country | Link |
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| CN (1) | CN202511577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398548A (en) * | 2013-07-29 | 2013-11-20 | 蔡京鹏 | Method and device for vaporization-heat-mostly-recyclable drying, carbonization or pyrolysis |
-
2012
- 2012-03-08 CN CN2012200848360U patent/CN202511577U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398548A (en) * | 2013-07-29 | 2013-11-20 | 蔡京鹏 | Method and device for vaporization-heat-mostly-recyclable drying, carbonization or pyrolysis |
| CN103398548B (en) * | 2013-07-29 | 2016-01-20 | 蔡京鹏 | A kind of heat of vaporization can greatly portion recycle oven dry, destructive distillation or method for pyrolysis and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20190308 |
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| CF01 | Termination of patent right due to non-payment of annual fee |