CN202849483U - Large-scale pit fuel gas type heat treatment furnace - Google Patents
Large-scale pit fuel gas type heat treatment furnace Download PDFInfo
- Publication number
- CN202849483U CN202849483U CN 201220451837 CN201220451837U CN202849483U CN 202849483 U CN202849483 U CN 202849483U CN 201220451837 CN201220451837 CN 201220451837 CN 201220451837 U CN201220451837 U CN 201220451837U CN 202849483 U CN202849483 U CN 202849483U
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- furnace
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- furnace wall
- refractory fiber
- flue
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Abstract
The utility model discloses a large-scale pit fuel gas type heat treatment furnace. The large-scale pit fuel gas type heat treatment furnace comprises a plurality of fuel gas burners, a furnace wall, a furnace bottom, a furnace cover, a flue and a chimney, wherein the fuel gas burners are arranged on the furnace wall in a plurality of layers and point to the tangential direction of the same cylinder in the furnace in the same rotation direction; the furnace wall comprises a furnace wall steel frame and a refractory fiber layer which is connected with the inner side and the top of the furnace wall steel frame, and a step surface is arranged on the upper end face of the refractory fiber layer; the furnace cover comprises a left half furnace cover and a right half furnace cover, mutually-buckled steps are arranged at adjacent ends of the two half furnace covers, and a double-seal surface is respectively formed between the two half furnace covers and between each half furnace cover and the furnace wall; a gas chamber which is connected with a furnace chamber is arranged in the center of the furnace bottom; the flue is connected with the gas chamber, and the outlet of the flue is connected with the chimney through a draught fan; and the draught fan is connected with a variable-frequency motor. The large-scale pit fuel gas type heat treatment furnace can ensure the uniformity of the furnace temperature, the sealability of the furnace chamber and the stability of the furnace pressure, has the advantages of uniform heating and small heat loss, and can meet requirements on heat treatment of large-scale parts.
Description
Technical field
The utility model relates to a kind of heat treatment furnace, especially for large-scale melt pit combustion type heat treatment furnace.
Background technology
At present some heavy partss are being added man-hour, as for diameter being 10 meters end socket, when production process and final thermal treatment, supporting large-scale equipment for Heating Processing need arranged; In existing factory building, it is large to build so large kiln employing car type furnace or other type of furnace floor spaces, factory building has not had the space, unless increase investment, extend a factory building, as adopt other type of furnaces, such as traditional gas type heating stove (or annealing furnace), for large furnace cavity like this, the homogeneity of its furnace temperature is difficult to guarantee, bell is opened as being convenient to, the stopping property of burner hearth is difficult to again guarantee, and manual or electronic flue butterfly valve, the deficiency of this structure formation are all adopted in the control of furnace pressure, the one, response lag (being mechanical action) can not in time be regulated furnace pressure; The 2nd, sharpness of regulation poor (butterfly valve open cross section be not linear), the furnace pressure fluctuation is large, and its exhaust smoke level is wayward, causes that furnace pressure is unstable, thermosteresis is larger.
Summary of the invention
The purpose of this utility model is for the prior art above shortcomings, a kind of large-scale melt pit combustion type heat treatment furnace is provided, it can guarantee the homogeneity of furnace temperature, the stopping property of burner hearth and the stability of furnace pressure, have homogeneous heating, advantage that thermosteresis is little, can satisfy the heat treated needs of heavy parts.
For achieving the above object, large-scale melt pit combustion type heat treatment furnace of the present utility model, comprise several fuel burner nozzles, furnace wall, furnace bottom, bell, flue, chimney, it is characterized in that described several fuel burner nozzles are divided into several layers being loaded on the furnace wall and with the tangential direction of same cylinder in the sensing stove of rotation direction; Described furnace wall comprise the furnace wall steelframe, with the refractory fiber floor that furnace wall steelframe inboard links to each other with the top, be provided with step surface in the upper surface of this refractory fiber floor; Described bell comprises left and right two halves bell, per half bell comprises the bell steelframe, is coupled to the bell refractory fiber floor of bell steelframe downside, the end that the two halves bell is adjacent is provided with the step of mutual fastening, wherein the bell refractory fiber floor of half bell end contacts with the bell steelframe of second half bell end, and the bell refractory fiber floor end face at both ends also contacts; The lower surface, edge of every bell steelframe contacts with the outside step surface of furnace wall refractory fiber floor, and the lower surface, the outside of every bell refractory fiber floor contacts with the inner side step face of furnace wall refractory fiber floor; Center at furnace bottom also is provided with the air chamber that links to each other with burner hearth, and described flue links to each other with air chamber, and the outlet of flue links to each other with described chimney by induced draft fan, and induced draft fan links to each other with variable-frequency motor.
The furnace cavity of large-scale gas furnace is large, the homogeneity of furnace temperature is decided by the unit cycle index of high temperature gas flow in burner hearth to a great extent, it is the movement velocity of coefficient of heat convection and high temperature gas flow, cycle index has substantial connection, several fuel burner nozzles of the present utility model are divided into several layers being loaded on the furnace wall and with the tangential direction of same cylinder in the sensing stove of rotation direction, can be to the acceleration of constantly heating of the high temperature gas flow of the reduction of speed of lowering the temperature on the way, form a Cylinder heating space, and without burning hot-fluid dead angle, form the temperature field of rotation, cycle index is many, thereby guarantees the homogeneity of furnace temperature;
Between the two halves bell, all form double seal face between per half bell and the furnace wall, furnace wall refractory fiber floor and bell refractory fiber floor have certain toughness, but their size interference settings on the sealing direction, the two halves bell is after lifting puts in place, under the pressure of deadweight, each trim seals tightlyer because of fiber compression set, both has been convenient to open, and guarantees again the stopping property of burner hearth;
Induced draft fan is driven by variable-frequency motor, the hot gas flow that rises in the burner hearth under the draft effect that induced draft fan produces at the burner hearth center by drop-down, the stability that keeps air current flow in the above and below in cylinder shape temperature field, make whole temperature field temperature more even, flue gas then by air chamber, flue, enter chimney through induced draft fan and discharge; Simultaneously variable-frequency motor can be realized stepless regulating, and then accurately controls furnace pressure, has homogeneous heating, advantage that thermosteresis is little;
As further improvement of the utility model, in flue, also be provided with preheater; Heat energy in the recyclable flue gas reduces environmental pollution;
In sum, the utility model can guarantee the homogeneity of furnace temperature, the stopping property of burner hearth and the stability of furnace pressure, has homogeneous heating, advantage that thermosteresis is little, can satisfy the heat treated needs of heavy parts.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the vertical view of furnace wall.
Fig. 3 is the partial enlarged drawing at I place among Fig. 1.
Fig. 4 is the partial enlarged drawing at II place among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As shown in Figures 1 to 4, this large-scale melt pit combustion type heat treatment furnace, comprise several fuel burner nozzles 6, furnace wall 1, furnace bottom 2, bell 3, flue 4, place preheater 5, chimney 7 in the flue 4, furnace wall 1, furnace bottom 2 and flue 4 all place melt pit, and described several fuel burner nozzles 6 are divided into two-layer be loaded on the furnace wall 1 and with the tangential direction of same cylinder in the sensing stove of rotation direction; Described furnace wall 1 comprise furnace wall steelframe 1a, with the refractory fiber floor 1b that furnace wall steelframe 1a inboard links to each other with the top, be provided with step surface in the upper surface of this refractory fiber floor 1b; Described bell 3 comprises left semicircle bell 3a and right semi-circle bell 3b, left semicircle bell 3a comprises bell steelframe 3c, be coupled to the bell refractory fiber floor 3d of bell steelframe 3c downside by steel bar 8, right semi-circle bell 3b comprises bell steelframe 3e, be coupled to the bell refractory fiber floor 3f of bell steelframe 3e downside by steel bar 8, a two halves circular furnace lid 3a end adjacent with 3b is provided with the step of mutual fastening, wherein the bell refractory fiber floor 3f of right semi-circle bell 3b end contacts with the bell steelframe 3c of left semicircle bell 3a end, the bell refractory fiber floor 3d at both ends and the end face of 3f also contact, and form double seal face between two halves circular furnace lid 3a and 3b; The lower surface, edge of every bell steelframe 3c or 3e contacts with the outside step surface of furnace wall refractory fiber floor 1b, the lower surface, the outside of every bell refractory fiber floor 3d or 3f contacts with the inner side step face of furnace wall refractory fiber floor 1b, also forms double seal face between two halves circular furnace lid 3a or 3b and the furnace wall 1; Also be provided with the air chamber 9 that links to each other with burner hearth at the center of furnace bottom 2, described flue 4 links to each other with air chamber 9, and the outlet of flue 4 links to each other with described chimney 7 by induced draft fan 10, and induced draft fan 10 links to each other with variable-frequency motor 11.
Furnace cavity of the present utility model is large, its diameter is about 13 meters, the homogeneity of furnace temperature is decided by the unit cycle index of high temperature gas flow in burner hearth to a great extent, it is the movement velocity of coefficient of heat convection and high temperature gas flow, cycle index has substantial connection, the utility model is divided into two-layer be loaded on the furnace wall 1 and with the tangential direction of same cylinder in the sensing stove of rotation direction with several fuel burner nozzles 6, can be to the acceleration of constantly heating of the high temperature gas flow of the reduction of speed of lowering the temperature on the way, form a Cylinder heating space, and without burning hot-fluid dead angle, form the temperature field of rotation, cycle index is many, thereby guarantees the homogeneity of furnace temperature;
The two halves circular furnace covers between 3a and the 3b, the two halves circular furnace covers between 3a or 3b and the furnace wall 1 and all forms double seal face, furnace wall refractory fiber floor 1b and bell refractory fiber floor 3d or 3f have certain toughness, but their size interference settings on the sealing direction, two halves circular furnace lid 3a, 3b are after lifting puts in place, under the pressure of deadweight, each trim seals tightlyer because of fiber compression set, both has been convenient to open, and guarantees again the stopping property of burner hearth;
Induced draft fan 10 is driven by variable-frequency motor 11, the hot gas flow that rises in the burner hearth under the draft effect that induced draft fan 10 produces at the burner hearth center by drop-down, the stability that keeps air current flow in the above and below in cylinder shape temperature field, make whole temperature field temperature more even, flue gas then enters chimney 7 through induced draft fan 10 and discharges by air chamber 9, flue 4, preheater 5; Simultaneously variable-frequency motor 11 can be realized stepless regulating, and then accurately controls furnace pressure, has homogeneous heating, advantage that thermosteresis is little, can satisfy the heat treated needs of heavy parts.
Claims (2)
1. one kind large-scale melt pit combustion type heat treatment furnace, comprise several fuel burner nozzles, furnace wall, furnace bottom, bell, flue, chimney, it is characterized in that described several fuel burner nozzles are divided into several layers being loaded on the furnace wall and with the tangential direction of same cylinder in the sensing stove of rotation direction; Described furnace wall comprise the furnace wall steelframe, with the refractory fiber floor that furnace wall steelframe inboard links to each other with the top, be provided with step surface in the upper surface of this refractory fiber floor; Described bell comprises left and right two halves bell, per half bell comprises the bell steelframe, is coupled to the bell refractory fiber floor of bell steelframe downside, the end that the two halves bell is adjacent is provided with the step of mutual fastening, wherein the bell refractory fiber floor of half bell end contacts with the bell steelframe of second half bell end, and the bell refractory fiber floor end face at both ends also contacts; The lower surface, edge of every bell steelframe contacts with the outside step surface of furnace wall refractory fiber floor, and the lower surface, the outside of every bell refractory fiber floor contacts with the inner side step face of furnace wall refractory fiber floor; Center at furnace bottom also is provided with the air chamber that links to each other with burner hearth, and described flue links to each other with air chamber, and the outlet of flue links to each other with described chimney by induced draft fan, and induced draft fan links to each other with variable-frequency motor.
2. large-scale melt pit combustion type heat treatment furnace as claimed in claim 1 is characterized in that also being provided with preheater in flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451837 CN202849483U (en) | 2012-09-06 | 2012-09-06 | Large-scale pit fuel gas type heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451837 CN202849483U (en) | 2012-09-06 | 2012-09-06 | Large-scale pit fuel gas type heat treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202849483U true CN202849483U (en) | 2013-04-03 |
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ID=47980703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220451837 Withdrawn - After Issue CN202849483U (en) | 2012-09-06 | 2012-09-06 | Large-scale pit fuel gas type heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202849483U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796850A (en) * | 2012-09-06 | 2012-11-28 | 四川惊雷科技股份有限公司 | Large pit gas type thermal treatment furnace |
-
2012
- 2012-09-06 CN CN 201220451837 patent/CN202849483U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796850A (en) * | 2012-09-06 | 2012-11-28 | 四川惊雷科技股份有限公司 | Large pit gas type thermal treatment furnace |
| CN102796850B (en) * | 2012-09-06 | 2013-09-11 | 四川惊雷科技股份有限公司 | Large pit gas type thermal treatment furnace |
| WO2014036799A1 (en) * | 2012-09-06 | 2014-03-13 | 四川惊雷科技股份有限公司 | Large pit gas-type heat treatment furnace |
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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: 20130403 Effective date of abandoning: 20130911 |
|
| RGAV | Abandon patent right to avoid regrant |