CN202511599U - Baking system for cold bound pellet - Google Patents
Baking system for cold bound pellet Download PDFInfo
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- CN202511599U CN202511599U CN2012200848619U CN201220084861U CN202511599U CN 202511599 U CN202511599 U CN 202511599U CN 2012200848619 U CN2012200848619 U CN 2012200848619U CN 201220084861 U CN201220084861 U CN 201220084861U CN 202511599 U CN202511599 U CN 202511599U
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- flue gas
- baking
- fume
- hot flue
- deduster
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Abstract
The utility model discloses a baking system for a cold bound pellet. Hot fume generated through a hot fume gas source enters a circular baking system through a hot fume gas inlet header pipe and generates a baking effect; the fume of a first circular air pipe is returned to a hot gas source through the action of a first draught fan to be circularly used as gas source replenishing heat; and the fume of a second circular air pipe is eliminated through a waste fume processing system. By using the baking system, a low-temperature and high-air-speed quick baking method is adopted; the requirement of a baking gas source is reduced; a discharge temperature in the baked fume is decreased by about 80 DEG C; the service efficiency of the fume is improved; and the baking system has the advantages that the baking effect is good, the baking efficiency is high, the product quality is good, the structure is simple, the maintenance is convenient, the changeability is good, the cost is saved, the energy utilization is good, and the baking system is environment-friendly.
Description
Technical field
The utility model relates to a kind of drying system, particularly a kind of cold bound pellet drying system.
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 drying system of 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.
For realizing above-mentioned purpose, the utility model cold bound pellet drying system can adopt following technical scheme:
A kind of cold bound pellet drying system 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 and (4-2-5, 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 the structural representation of the utility model cold bound pellet drying system.
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 1ly, the utility model discloses a kind of cold bound pellet drying system, 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 cold bound pellet furnace drying method of above-mentioned cold bound pellet drying system 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, and cold bound pellet is drawn low-temperature zone 5-1 moved and in moving process, received need of stoving from hot flue gas to high temperature section 5-2; 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 (5)
1. cold bound pellet drying system 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.
2. cold bound pellet drying system according to claim 1 is characterized in that: 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).
3. cold bound pellet drying system according to claim 1 is characterized in that: be coated with lightweight refracrory in the said flue gas inlet manifold (2-1,2-2).
4. cold bound pellet drying system according to claim 1 is characterized in that: 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.
5. cold bound pellet drying system according to claim 1 is characterized in that: said dryer adopts grate type drying machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200848619U CN202511599U (en) | 2012-03-08 | 2012-03-08 | Baking system for cold bound pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200848619U CN202511599U (en) | 2012-03-08 | 2012-03-08 | Baking system for cold bound pellet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202511599U true CN202511599U (en) | 2012-10-31 |
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ID=47064080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200848619U Withdrawn - After Issue CN202511599U (en) | 2012-03-08 | 2012-03-08 | Baking system for cold bound pellet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202511599U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586590A (en) * | 2012-03-08 | 2012-07-18 | 江苏沙钢集团有限公司 | Drying system and method of cold-consolidated pellets |
-
2012
- 2012-03-08 CN CN2012200848619U patent/CN202511599U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586590A (en) * | 2012-03-08 | 2012-07-18 | 江苏沙钢集团有限公司 | Drying system and method of cold-consolidated pellets |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121031 Effective date of abandoning: 20130904 |
|
| RGAV | Abandon patent right to avoid regrant |