CN219624450U - Cooling air supply device for ash discharging hood of double-chamber kiln - Google Patents
Cooling air supply device for ash discharging hood of double-chamber kiln Download PDFInfo
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- CN219624450U CN219624450U CN202320754016.6U CN202320754016U CN219624450U CN 219624450 U CN219624450 U CN 219624450U CN 202320754016 U CN202320754016 U CN 202320754016U CN 219624450 U CN219624450 U CN 219624450U
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- cooling air
- kiln
- fan
- suspension cylinder
- supply device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The utility model discloses a cooling air supply device for ash discharging caps of a double-hearth kiln, which comprises a main cooling fan, wherein the main cooling fan is connected with cooling air release valves through cooling air pipes and then is connected with ash discharging caps at the bottoms of two kiln bodies of the double-hearth kiln, a central cooling fan is connected with the ash discharging caps at the bottoms of the two kiln bodies of the double-hearth kiln through central cooling air pipes, a suspension cylinder fan is connected with the upper parts of the two kiln bodies of the double-hearth kiln through suspension cylinder fan outlet pipes, a suspension cylinder fan outlet pipe extends out of a branch pipe and is connected with an electric regulating valve and then is connected with the central cooling air pipes, a thermocouple I is arranged at the joint of the two kiln bodies and the suspension cylinder fan outlet pipe, and a thermocouple II is arranged at the inner side of the ash discharging caps. Compared with the prior art, the utility model can solve the problems that the running stability of the cooling air supply device of the existing double-hearth kiln is poor, the kiln can only be stopped when the fault occurs, and the production is influenced.
Description
Technical Field
The utility model relates to the technical field of steel manufacturing and equipment thereof, in particular to a cooling air supply device for an ash discharging hood of a double-hearth kiln.
Background
The suspension cylinder system is a key core device of the melz kiln, and is composed of a suspension cylinder fan (rated flow 6500m 3 And/h), a suspension cylinder pipeline, a suspension cylinder body, a suspension cylinder casting material, refractory bricks, instrument settings and the like. Because the internal structure of the suspension cylinder belongs to a hollow structure formed by heat-resistant stainless steel and is positioned at the calcining position of the kiln, at least two suspension cylinder fans 8 are required to respectively perform uninterrupted cooling air supply (as shown in figure 1) on two suspension cylinder bodies of the kiln so as to prevent casting materials at the bottom of the suspension cylinder from falling off and fire-resistant materials from burning out.
In the calcination stage of the Maiz double-chamber kiln, a main cooling fan 3 passes through a cooling air pipe 2, passes through an ash outlet hood at the bottom of the kiln, and enters the kiln to cool finished lime. The central cooling fan 5 enters the ash outlet hood 6 through the central cooling air pipe 4 to cool the top end of the hood, and the central cooling air pipe 4 is fixed on a partition plate of the ash outlet hood 6. The whole cooling air supply device is shown in fig. 1, and comprises a main cooling fan 3, a cooling air release valve 1 and an ash outlet cap 6, wherein the ash outlet cap is connected with the bottoms of two kilns of the double-chamber kiln, the main cooling fan 3 is connected with the cooling air release valve 1 through a cooling air pipe, a central cooling fan 5 is connected with the ash outlet caps at the bottoms of two kilns of the double-chamber kiln through a central cooling air pipe 4, and two parallel suspension cylinder fans 8 are connected with the upper parts of two kilns of the double-chamber kiln through suspension cylinder fan outlet pipelines 9.
When the central cooling fan 3 fails, the cooling air supply device can only stop the kiln, and the kiln can not normally run. The number of fans of the existing double-hearth kiln is large, and the number of fans for combustion supporting and cooling is nearly 14. The characteristics of uninterrupted cooling of the cooling air of the suspension cylinder for 24 hours and excessive capacity load of the fan are considered, the frequency conversion transformation of the cooling air of the existing suspension cylinder can be considered in design, and the pipeline is partially transformed, so that the temperature of the suspension cylinder body and the cooling hood are reasonably controlled, and meanwhile, the electricity consumption is saved.
Disclosure of Invention
The utility model aims to solve the problems that the existing double-hearth kiln ash discharging hood cooling air supply device is poor in operation stability, only can be stopped when in failure, and production is affected.
In order to solve the problems, the technical scheme of the utility model is as follows: the ash discharging cap cooling air supply device of the double-hearth kiln comprises a main cooling fan, wherein the main cooling fan is connected with a cooling air release valve through a cooling air pipe, then is connected with ash discharging caps at the bottoms of two kiln bodies of the double-hearth kiln, a central cooling fan is connected with the bottoms of the two kiln bodies of the double-hearth kiln through a central cooling air pipe, a suspension cylinder fan is connected with the upper parts of the two kiln bodies of the double-hearth kiln through a suspension cylinder fan outlet pipeline, the suspension cylinder fan outlet pipeline extends out of a branch pipeline to be connected with an electric regulating valve and then is connected with the central cooling air pipe, a thermocouple I is arranged at the joint of the two kiln bodies and the suspension cylinder fan outlet pipeline, and a thermocouple II is arranged at the inner side of the ash discharging cap.
Among the above technical schemes, more specific schemes may be: the suspension cylinder fan is a variable-frequency suspension cylinder fan.
Further: the variable-frequency suspension cylinder fan is connected with a control unit.
Further: the first thermocouple, the second thermocouple and the electric regulating valve are all connected with the control unit.
Further: the control unit is a PLC.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
the ash discharging hood cooling air supply device of the double-hearth kiln is connected with the central cooling air pipe of the central cooling fan by dividing a pipeline on the outlet pipeline of the suspension cylinder fan, and the excessive capacity load of the suspension cylinder fan is utilized to supplement air supply for the central cooling air pipe of the double-hearth kiln when the central cooling fan fails, so that the ash discharging hood is cooled by effectively utilizing the capacity of the suspension cylinder fan; through carrying out frequency conversion transformation on the suspension cylinder fan, the protection of an ash outlet hood and a suspension cylinder body can be effectively realized, and the electricity consumption is saved; the branch pipelines, the electric regulating valve, the control unit and the control program are additionally combined, so that the equipment is reduced, meanwhile, the center cooling hood is well cooled, and the process production requirement is met;
the cooling air supply device and the control method for the ash discharging hood of the double-hearth kiln fully utilize the common characteristics of fans, combine and realize the functions of the central cooling hood and the suspension cylinder body by adding pipelines, valves, control units and control programs, and simplify the production process.
Drawings
FIG. 1 is a front view of the prior art;
FIG. 2 is a front view of an embodiment of the present utility model;
FIG. 3 is a front view of an ash cap or the like according to an embodiment of the utility model;
the marks in the figure are as follows: the cooling air release valve 1, the cooling air pipe 2, the main cooling fan 3, the central cooling air pipe 4, the central cooling fan 5, the ash discharging hood 6, the thermocouple II 7, the suspension cylinder fan 8, the suspension cylinder fan outlet pipeline 9, the branch pipeline 10, the electric control valve 11, the thermocouple I12 and the control unit 13.
Detailed Description
Embodiments of the utility model are described in further detail below with reference to the attached drawing figures:
the ash discharging cap cooling air supply device of the double-hearth kiln as shown in fig. 2 to 3 comprises a main cooling fan 3, wherein the main cooling fan is connected with a cooling air release valve 1 through a cooling air pipe 2 and then is connected with ash discharging caps 6 at the bottoms of two kiln bodies of the double-hearth kiln, a central cooling fan 5 is connected with ash discharging caps 6 at the bottoms of two kiln bodies of the double-hearth kiln through a central cooling air pipe 4, a suspension cylinder fan 8 is connected with the upper parts of the two kiln bodies of the double-hearth kiln through a suspension cylinder fan outlet pipeline 9, a suspension cylinder fan outlet pipeline 9 extends out of a branch pipeline 10 and is connected with an electric regulating valve 11 and then is connected with the central cooling air pipe 4, a thermocouple I12 is arranged at the joint of the two kiln bodies and the suspension cylinder fan outlet pipeline 9, and a thermocouple II 7 is arranged at the inner side of the ash discharging cap 6; the central cooling air pipe 4 of the central cooling fan is connected through a branch pipeline 10 on the outlet pipeline 9 of the suspension cylinder fan, and the excessive capacity load of the suspension cylinder fan 8 is utilized to supplement air supply to the central cooling air pipe 4 of the double-hearth kiln when the central cooling fan 5 fails, so that the ash outlet hood 6 is cooled by effectively utilizing the capacity of the suspension cylinder fan 8.
The suspension cylinder fan 8 is a variable-frequency suspension cylinder fan, the variable-frequency suspension cylinder fan is connected with a control unit 13, and the thermocouple I12, the thermocouple II 7 and the electric control valve 11 are all connected with the control unit 13, and the control unit is a PLC. Through the frequency conversion transformation of the suspension cylinder fan 8, the protection of the ash discharging hood 6 and the suspension cylinder body can be effectively realized, and the electricity consumption is saved; and the branch pipeline 10, the electric regulating valve 11, the control unit 13 and the control program are additionally combined, so that the equipment is reduced, and meanwhile, the central cooling hood is well cooled, and the process production requirement is met.
The control program set in the control unit 13 is as follows:
under the production condition, the hanging cylinder fan 8 is normally opened, the electric regulating valve 11 is normally opened, and the hanging cylinder body and the ash discharging hood are cooled by the hanging cylinder fan 8, so that the first thermocouple 12 and the second thermocouple 7 are not higher than the upper temperature limit value on the basis of fan energy conservation; (if the upper limit value of the temperature of the first thermocouple is set to 200 ℃, and the upper limit value of the temperature of the second thermocouple is set to 7, 200 ℃); when the temperature of the second thermocouple 7 of the ash outlet hood is higher than 200 ℃, the control unit 13 carries out variable frequency speed regulation on the suspension cylinder fan 8, and increases the opening of the electric regulating valve 11 so as to realize cooling of the ash outlet hood; when the temperature of the first thermocouple 12 at the outlet of the suspension cylinder is higher than 200 ℃, the control unit 13 carries out variable frequency speed regulation on the fan 8 of the suspension cylinder, and reduces the opening of the electric regulating valve so as to realize cooling of the cylinder body of the suspension cylinder.
When the kiln is stopped, the materials in the kiln do not move from top to bottom, the finished materials do not need to be cooled because of no discharging, and the temperature of the blast cap does not rise upwards. Therefore, the control unit 13 closes the electric regulating valve 11 according to the temperature condition of the hood, and the suspension cylinder fan 8 changes frequency to reduce the rotating speed, so that the temperature of the thermocouple II 7 is continuously lower than 200 ℃, and the energy saving is realized.
When the electric regulating valve 8 fails and cannot be opened, the central cooling fan 5 is started to cool the central cooling hood.
The cooling air supply device and the control method for the ash discharging hood of the double-hearth kiln fully utilize the common characteristics of fans, combine and realize the functions of the central cooling hood and the suspension cylinder body by adding pipelines, valves, control units and control programs, and simplify the production process.
Claims (5)
1. The utility model provides a two thorax kiln ash discharge cap cooling air supply device, includes that main cooling fan passes through the cooling air pipe and connects the ash discharge cap of two kiln bottoms of two thorax kilns behind the cooling air release valve, and central cooling fan passes through the central cooling air pipe and connects two kiln bottoms of two thorax kilns ash discharge cap, hang jar fan and connect two kiln body upper portions of two thorax kilns, its characterized in that through hanging jar fan outlet pipe: the outlet pipeline of the suspension cylinder fan extends out of the branch pipeline to be connected with the electric regulating valve and then is connected with the central cooling air pipe, a first thermocouple is arranged at the joint of the two kiln bodies and the outlet pipeline of the suspension cylinder fan, and a second thermocouple is arranged at the inner side of the ash outlet hood.
2. The dual chamber kiln exhaust hood cooling air supply device of claim 1, wherein: the suspension cylinder fan is a variable-frequency suspension cylinder fan.
3. The dual chamber kiln exhaust hood cooling air supply device of claim 2, wherein: the variable-frequency suspension cylinder fan is connected with a control unit.
4. A dual chamber kiln dust cap cooling air supply device according to claim 3, wherein: the first thermocouple, the second thermocouple and the electric regulating valve are all connected with the control unit.
5. The double-hearth kiln dust cap cooling air supply device according to claim 3 or 4, wherein: the control unit is a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320754016.6U CN219624450U (en) | 2023-04-07 | 2023-04-07 | Cooling air supply device for ash discharging hood of double-chamber kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320754016.6U CN219624450U (en) | 2023-04-07 | 2023-04-07 | Cooling air supply device for ash discharging hood of double-chamber kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219624450U true CN219624450U (en) | 2023-09-01 |
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ID=87776336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320754016.6U Active CN219624450U (en) | 2023-04-07 | 2023-04-07 | Cooling air supply device for ash discharging hood of double-chamber kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219624450U (en) |
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2023
- 2023-04-07 CN CN202320754016.6U patent/CN219624450U/en active Active
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