CN203848676U - Annular sleeve kiln - Google Patents
Annular sleeve kiln Download PDFInfo
- Publication number
- CN203848676U CN203848676U CN201420246285.2U CN201420246285U CN203848676U CN 203848676 U CN203848676 U CN 203848676U CN 201420246285 U CN201420246285 U CN 201420246285U CN 203848676 U CN203848676 U CN 203848676U
- Authority
- CN
- China
- Prior art keywords
- kiln
- sleeve
- combustion chamber
- lower sleeve
- upper bush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 21
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 21
- 239000004571 lime Substances 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 18
- 235000019738 Limestone Nutrition 0.000 abstract description 18
- 239000003546 flue gas Substances 0.000 abstract description 18
- 239000007789 gas Substances 0.000 abstract description 18
- 239000006028 limestone Substances 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 7
- 230000001965 increasing effect Effects 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000011229 interlayer Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Abstract
The utility model discloses an annular sleeve kiln. The annular sleeve kiln comprises a kiln shell, an upper sleeve, a lower sleeve, a material arranging system, an upper combustion chamber, a lower combustion chamber and nozzles, wherein the upper sleeve and the lower sleeve are placed in the kiln shell and are provided with cooling interlayers, an annular channel is formed among the upper sleeve, the lower sleeve and the kiln shell, the material arranging system is placed at the upper end of the annular channel, the upper combustion chamber and the lower combustion chamber are arranged on the circumference of the outer side of the kiln shell and are distributed at an interval and the nozzles are arranged at the outer end of the upper combustion chamber and the outer end of the lower combustion chamber. The outer diameter of the upper sleeve is smaller than the outer diameter of the lower sleeve. Due to the fact that the outer diameter of the upper sleeve is smaller than the outer diameter of the lower sleeve, the size of the annular space of a pre-heating zone between the upper sleeve and the kiln shell is increased. Thus, the amount of limestone in the pre-heating zone is increased, the heat transmission efficiency of flue gas at the top of the kiln and the limestone is increased, the temperature of exhuast gas at the top of the kiln is lowered, and accordingly the purposes of reducing heat consumption and saving energy are realized.
Description
Technical field
The utility model relates to a kind of annular lime kiln, and especially a kind of non-constant section annular lime kiln, belongs to calciner technical field.
Background technology
The typical structure of existing annular lime kiln is as disclosed in US4431407 United States Patent (USP), and design conditions when this type of sleeve kiln is introduced are at first that fuel value requires 1800kCal/Nm
3(7537kJ/Nm
3), through the further improvement design of domestic sleeve kiln industry specialists, can make sleeve kiln be low to moderate 1400kCal/Nm at calorific value of gas
3(5862kJ/Nm
3) condition assign product.But the entrained heat of excessive flue gas that low-heat value gas combustion produces can not fully be absorbed by the bed of material, often makes the exhaust gas temperature of sleeve kiln too high.Have to limit the air inducing amount of exhaust gas fan for controlling the exhaust gas temperature of sleeve kiln, make so again lime cooling-air suck not enough, cause ash discharge temperature drift.The exhaust gas temperature of sleeve kiln and ash discharge excess Temperature not only make the hear rate of sleeve kiln increase and also entail dangers to the safe handling of kiln top equipment and ash discharge equipment.
For overcoming above-mentioned shortcoming, the method that lengthens preheating zone can increase the heat exchange area and the amount of stored heat that increases lime stone between flue gas and lime stone, it is the effective way that reduces lime shaft kiln exhaust gas temperature, but increase flue gas by the resistance of the bed of material, certainly will strengthen the load of air inducing equipment, lengthen preheating zone has also increased construction cost simultaneously.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of non-constant section annular lime kiln, thereby do not increasing on the basis of annular lime kiln construction cost, reduce kiln top temperature, ash discharge temperature, the UTILIZATION OF VESIDUAL HEAT IN that strengthens flue gas, makes kiln top equipment and the stable operation under the environment of safety of ash discharge equipment.The technical solution adopted in the utility model is: a kind of annular lime kiln, comprising: kiln shell; Be placed in the upper bush with cooling sandwith layer, lower sleeve in kiln shell, between described upper bush, lower sleeve and kiln shell, form circular passage; Be placed in the cloth system of upper end, described circular passage; Be arranged on kiln shell outer circumference and upper combustion chamber and lower combustion chamber spaced apart; Be arranged on the burner of described upper combustion chamber and lower combustion chamber outer end; The external diameter of wherein said upper bush is less than the external diameter of lower sleeve.
The utility model further technical characterictic is:
The magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.7～0.9D.
The magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.7D.
The magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.75D.
The magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.8D.
The magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.9D.
The beneficial effects of the utility model are:
1, because upper bush external diameter is less than lower sleeve external diameter, annular space between upper bush and kiln shell increases comparatively speaking, be that preheating zone annular space strengthens, thereby increase the amount that preheating zone can hold lime stone, increase heat exchange area and the amount of stored heat that increases lime stone between flue gas and lime stone, finally can reduce the temperature of kiln top flue gas.
2, because flue gas enters heat exchanger to driving the heat reclaiming after air heat directly to heat lime stone lower than flue gas through upper bush, preheating zone sectional area expands can increase the ratio that enters preheating zone exhaust gas volumn and account for total exhaust gas volumn, the obstruction that is conducive to reduce hear rate He delays heat exchanger.
3, preheating zone annular space strengthens, and the lime stone in preheating zone moves more smooth and easy, and the probability that dross is stopped up obviously reduces.
4, after preheating zone annular space increases, increase the capacity of preheating zone unit height lime stone, can reduce flue gas simultaneously by the resistance of the preheating zone bed of material, therefore SR declines, and can reduce accordingly the load of exhaust gas fan.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further:
Embodiment mono-
The annular lime kiln of the present embodiment as shown in Figure 1, comprising: kiln shell 1; Be placed in the upper bush 2 with cooling sandwith layer in kiln shell 1, trap
Cylinder 3, forms circular passage 4 between described upper bush 2, lower sleeve 3 and kiln shell 1; Be placed in the cloth system 5 of 4 upper ends, described circular passage;
Be arranged on kiln shell 1 outer circumference and upper combustion chamber 6 and lower combustion chamber 7 spaced apart; Be arranged on described upper combustion chamber and lower combustion chamber outer end
Burner 8; The outside diameter d of wherein said upper bush 2 is less than the outer diameter D of lower sleeve 3.In the present embodiment, the outside diameter d of upper bush 2 is
70% of lower sleeve 3 outer diameter D.
When annular lime kiln work, carry out the normal temperature air of self-driven blower fan F1 and enter that heat exchanger 9 is rear is preheated to 450 DEG C from the high-temp waste gas of upper bush 2 bottoms, shown in the driving air of 450 DEG C first enter and drive air endless tube 10 then to send into the interior working fluid as injector of playpipe 11 for injection recyclegas, drive air to enter lower combustion chamber 7 together with recyclegas and participate in burning, the flue gas that burning produces the effect that drives power flow downward and ejector action at injector under enter lower sleeve 3 inside from recyclegas import 12.Under the effect of lime cooling-air negative pressure in kiln, enter cool lime from 13 suctions of kiln bed material storehouse, and enter lower sleeve 3 inside from lower sleeve 3 recyclegas imports 12.
Under the effect of exhaust gas fan F2, the high-temperature flue gas producing from the part high-temperature flue gas of lower combustion chamber 7 and upper combustion chamber's 6 burnings circular passage 4 interior on flow, at upper bush, 2 bottom places shunt, part enters exhaust gas fan F2 after entering and entering heat exchanger 9 heat exchange behind upper bush 2 inside, most of circular passage 4 interior on the preheating of flowing distribute by cloth system 1 lime stone entering in circular passage 4, then directly enter exhaust gas fan F2 from kiln top exhaust piping.
Because upper bush 2 inner space resistance coefficients are less, after reduced outside diameter, smoke gas flow is less through the pressure loss of upper bush 2 inside, and the impact that the flow that enters heat exchanger waste gas that reduces to cause because of external diameter reduces can be ignored.Because upper bush 2 external diameters reduce, annular space between kiln shell 1 and upper bush 2 is that space, lime stone preheating zone increases, the lime stone flow that enters this space increases, thereby the heat transfer area of preheating zone flue gas and lime stone heat convection expands, heat convection efficiency is strengthened, can effectively utilize the waste heat of waste gas, reduce kiln top flue-gas temperature.Because flue gas enters heat exchanger 9 to driving the heat reclaiming after air heat directly to heat lime stone heat used lower than flue gas through upper bush 2, preheating zone sectional area expands can increase the ratio that enters preheating zone exhaust gas volumn and account for total exhaust gas volumn, the obstruction that is conducive to reduce hear rate He delays heat exchanger 9.Meanwhile, preheating zone annular space strengthens, and the lime stone in preheating zone moves more smooth and easy, and the probability that dross is stopped up obviously reduces.And after the increase of preheating zone annular space, increase the capacity of preheating zone unit height lime stone, and can reduce flue gas simultaneously by the resistance of the preheating zone bed of material, therefore SR declines, and can reduce accordingly the load of exhaust gas fan F2.
Embodiment bis-:
Other structures of the present embodiment are with embodiment mono-, and in the present embodiment, the outside diameter d of upper bush is 75% of lower sleeve outer diameter D.Taking the annular lime kiln of daily output 500t lime as example, former design kiln shell diameter 8m, upper and lower sleeve outer diameter 4.46m, adopts low heat value (1400kCal/Nm
3) in coal gas calcined limestone process, kiln top temperature basic controlling is at 220-230 DEG C, ash discharge temperature is within the scope of 100-120 DEG C; Upper bush external diameter is reduced to 3.345m, i.e. d=0.75D, when other conditions remain unchanged, kiln top temperature can be controlled within the scope of 150-180 DEG C, and ash discharge temperature basic controlling is at 80-100 DEG C; The daily output of sleeve kiln is brought up to 550t by 500t simultaneously, overfulfils a production target 10%.
Embodiment tri-:
Other structures of the present embodiment are with embodiment mono-, and in the present embodiment, the outside diameter d of upper bush is 80% of lower sleeve outer diameter D.
Embodiment tetra-:
Other structures of the present embodiment are with embodiment mono-, and in the present embodiment, the outside diameter d of upper bush is 90% of lower sleeve outer diameter D.
Above-mentioned is only description to specific embodiment, and coverage of the present utility model is not limited to above-described embodiment, and on the contrary, the utility model is contained all technical schemes that fall in fact within the scope of the claims under all instructions on literal or in equivalents.Protection domain of the present utility model is as the criterion with claims.
Claims (6)
1. an annular lime kiln, comprising:
Kiln shell;
Be placed in the upper bush with cooling sandwith layer, lower sleeve in kiln shell, between described upper bush, lower sleeve and kiln shell, form circular passage;
Be placed in the cloth system of upper end, described circular passage;
Be arranged on kiln shell outer circumference and upper combustion chamber and lower combustion chamber spaced apart;
Be arranged on the burner of described upper combustion chamber and lower combustion chamber outer end;
It is characterized in that: the external diameter of described upper bush is less than the external diameter of lower sleeve.
2. annular lime kiln according to claim 1, is characterized in that: the magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.7～0.9D.
3. annular lime kiln according to claim 2, is characterized in that: the magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.7D.
4. annular lime kiln according to claim 2, is characterized in that: the magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.75D.
5. annular lime kiln according to claim 2, is characterized in that: the magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.8D.
6. annular lime kiln according to claim 2, is characterized in that: the magnitude relationship of the outside diameter d of described upper bush and the outer diameter D of lower sleeve is d=0.9D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420246285.2U CN203848676U (en) | 2014-05-14 | 2014-05-14 | Annular sleeve kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420246285.2U CN203848676U (en) | 2014-05-14 | 2014-05-14 | Annular sleeve kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203848676U true CN203848676U (en) | 2014-09-24 |
Family
ID=51561683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420246285.2U Expired - Lifetime CN203848676U (en) | 2014-05-14 | 2014-05-14 | Annular sleeve kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203848676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940238A (en) * | 2014-05-14 | 2014-07-23 | 江苏中圣园科技股份有限公司 | Annular sleeve kiln |
-
2014
- 2014-05-14 CN CN201420246285.2U patent/CN203848676U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940238A (en) * | 2014-05-14 | 2014-07-23 | 江苏中圣园科技股份有限公司 | Annular sleeve kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |