CN220541122U - Pulverized coal injection conveying equipment for double-hearth kiln - Google Patents
Pulverized coal injection conveying equipment for double-hearth kiln Download PDFInfo
- Publication number
- CN220541122U CN220541122U CN202321534080.XU CN202321534080U CN220541122U CN 220541122 U CN220541122 U CN 220541122U CN 202321534080 U CN202321534080 U CN 202321534080U CN 220541122 U CN220541122 U CN 220541122U
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- China
- Prior art keywords
- pipeline
- kiln
- valve
- pulverized coal
- dome valve
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- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000007664 blowing Methods 0.000 claims abstract description 21
- 238000005243 fluidization Methods 0.000 claims abstract description 18
- 238000010926 purge Methods 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Abstract
The utility model provides pulverized coal injection conveying equipment of a double-hearth kiln, and mainly relates to the field of pulverized coal injection conveying equipment. The pulverized coal injection conveying equipment of the double-hearth kiln comprises a main air supply pipeline, a manual ball valve, an air filter, a pressure regulating valve, a flexible joint I, a pressure gauge, a tail purging pipeline, a three-way pipe, a feeder outlet dome valve, a vertical rotary feeder, a control cabinet, a flange fluidization device, a pump body fluidization device, a support leg component, an injection tank and a weighing device; the utility model has the beneficial effects that: the utility model has simple structure, convenient use and high blowing precision; the blowing is stable, and the material characteristics are not changed and the fluctuation of the kiln pressure is not influenced; the unique vertical rotary feeding structure design ensures that the coal injection system is smooth and has no fluctuation, and ensures that the pulverized coal is uniformly and stably injected in the pipeline without blockage; the frequency conversion speed regulation continuous quantitative feeding can realize on-line automatic adjustment of feeding quantity.
Description
Technical Field
The utility model mainly relates to the field of pulverized coal injection conveying equipment, in particular to pulverized coal injection conveying equipment of a double-hearth kiln.
Background
Each double-hearth kiln is provided with two kiln hearths, and each kiln hearth is provided with 33 coal injection ports. The double-chamber kiln can use fluid fuel, such as coal gas, oil, coal powder and the like. Combustion air is fed from the upper part of the shaft kiln by a Roots blower, the combustion air is preheated in a preheating zone before being mixed with fuel, and then combustion flame airflow flows through a calcining zone and parallel to ore, so that the ore is calcined. The design of a traditional pulverized coal injection main pulverized coal bin, a spiral distribution conveyor, a metering spiral and a pulverized coal injection device. The jetting amount is controlled by adjusting the air amount, and the disadvantage of the process mode is that the jetting amount is easy to be uneven, the jetting pipe is easy to be blocked, the combustion in the kiln chamber is uneven, and the operation is inconvenient.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides the pulverized coal injection conveying equipment of the double-hearth kiln, which has the advantages of simple structure, convenient use and high injection precision; the blowing is stable, and the material characteristics are not changed and the fluctuation of the kiln pressure is not influenced; the unique vertical rotary feeding structure design ensures that the coal injection system is smooth and has no fluctuation, and ensures that the pulverized coal is uniformly and stably injected in the pipeline without blockage; the frequency conversion speed regulation continuous quantitative feeding can realize on-line automatic adjustment of feeding quantity.
The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme:
the pulverized coal injection conveying equipment of the double-hearth kiln comprises a main air supply pipeline, a manual ball valve, an air filter, a pressure regulating valve, a flexible joint I, a pressure gauge, a tail purging pipeline, a three-way pipe, a feeder outlet dome valve, a vertical rotary feeder, a control cabinet, a flange fluidization device, a pump body fluidization device, a support leg assembly, an injection tank, a weighing device, a balance pipeline, an inlet dome valve, a flexible joint III, a dome valve, an exhaust pipeline, a flexible joint IV, an exhaust dome valve, a level gauge and a top pressurizing pipeline;
the injection tank, the vertical rotary feeder and the dome valve are used as main body components of the whole double-hearth kiln injection system, and the injection tank is connected with an inlet dome valve and a flexible joint III;
a flexible joint is arranged between the injection tank inlet dome valve and the exhaust dome valve, and a flexible sealing gasket is arranged at the joint surface; the pump body fluidization device is arranged around the blowing tank and consists of a fluidization base, a check valve, a throttle hole pipe, a nylon pipe and the like; level gauges are respectively arranged above and below the blowing tank;
the outlet of the blowing tank is provided with a three-way pipe and a vertical rotary feeder, and the joint surface is sealed by adopting a metal winding gasket; the vertical rotary feeder outlet is provided with a feeder outlet dome valve, a three-way pipe is arranged below the feeder outlet dome valve, a flexible joint is arranged on the left side of the three-way pipe, and a tail purging pipeline is arranged on the right side of the three-way pipe.
Further, the vertical rotary feeder is a double feeder.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model has simple structure, convenient use and high blowing precision; the blowing is stable, and the material characteristics are not changed and the fluctuation of the kiln pressure is not influenced; the unique vertical rotary feeding structure design ensures that the coal injection system is smooth and has no fluctuation, and ensures that the pulverized coal is uniformly and stably injected in the pipeline without blockage; the frequency conversion speed regulation continuous quantitative feeding can realize on-line automatic adjustment of feeding quantity.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a coal dust injection pipe;
FIG. 3 is a schematic view of a vertical rotary feeder;
FIG. 4 is a schematic diagram of a pulverized coal distributor;
FIG. 5 is a schematic diagram of a two-chamber kiln with 33 guns;
FIG. 6 is a schematic view of a 16-gun structure;
FIG. 7 is a schematic view of a 17-gun structure;
FIG. 8 is a schematic diagram of a two 33 gun structure of a double-hearth kiln hearth;
FIG. 9 is a schematic view of a two-16 gun structure;
FIG. 10 is a schematic view of a two-chamber 17 gun structure;
the reference numbers shown in the drawings: 1. a main air supply duct; 2. an inlet dome valve; 3. a flexible joint III; 4. a dome valve; 5. a weighing device; 6. an exhaust line; 7. a blowing tank; 8. a pump body fluidization device; 9. balance pipeline I; 10. a balance pipeline II; 11. a leg assembly; 12. a flange fluidization device; 13. an outlet dome valve of the feeder; 14. a flexible joint I; 15. a three-way pipe; 16. a tail purging pipeline; 17. a pressure gauge; 18. a vertical rotary feeder; 19. a manual ball valve; 20. an air filter; 21. a pressure regulating valve; 22. a top pressurization tube; 23. an exhaust dome valve; 24. a flexible joint IV; 25. a level gauge; 26. a control cabinet; 27. a pipeline switching Y-shaped valve I; 28. a first distributor; 29. a second distributor; 30. a pipeline switching Y-shaped valve II; 31. a third distributor; 32. and a distributor IV.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes or modifications may be made by those skilled in the art after reading the teachings of the utility model, and such equivalents are intended to fall within the scope of the utility model as defined herein.
As shown in fig. 1-10, the pulverized coal injection conveying equipment of the double-hearth kiln comprises a main air supply pipeline 1, a manual ball valve 19, an air filter 20, a pressure regulating valve 21, a flexible joint I14, a pressure gauge 17, a tail purging pipeline 16, a three-way pipe 15, a feeder outlet dome valve 13, a vertical rotary feeder 18, a control cabinet 26, a flange fluidization device 12, a pump body fluidization device 8, a support leg assembly 11, an injection tank 7, a weighing device 5, a balance pipeline I9, a balance pipeline II 10, an inlet dome 2, a flexible joint III 3, a dome valve 4, an exhaust pipeline 6, a flexible joint IV 24, an exhaust dome valve 23, a level gauge 25 and a top pressurizing pipeline 22;
the injection tank 7, the vertical rotary feeder 18 and the dome valve are used as main body components of the whole double-hearth kiln injection system, and the injection tank 7 is connected with an inlet dome valve 2 and a flexible joint III 3;
a flexible joint is arranged between the inlet dome valve 2 of the blowing tank 7 and the exhaust dome valve 23, and a flexible sealing gasket is arranged at the joint surface; the pump body fluidization device 8 is arranged around the blowing tank 7, and the pump body fluidization device 8 consists of a fluidization base, a check valve, a throttle hole pipe, a nylon pipe and the like; level gauges 25 are respectively arranged above and below the blowing tank 7;
the outlet of the blowing tank 7 is provided with a three-way pipe 15 and a vertical rotary feeder 18, and the joint surface is sealed by adopting a metal winding gasket; the outlet of the vertical rotary feeder 18 is provided with a feeder outlet dome valve 13, a three-way pipe 15 is arranged below the feeder outlet dome valve 13, a flexible joint 14 is arranged on the left side of the three-way pipe 15, and a tail purging pipeline 16 is arranged on the right side.
Further, the vertical rotary feeder 18 is a twin feeder.
Examples:
the double-hearth kiln injection system can be connected in series and parallel under the control of a PLC system and automatically works according to a program, and the flow is as follows:
(1) The exhaust valve of the rotary feed pump is opened to release the pressure in the tank. The exhaust speed is controlled by adopting a rotary exhaust valve and a wear-resistant regulating valve on the exhaust pipe, so that the scouring wear of the exhaust valve and an exhaust pipeline is reduced.
(2) After the pressure of the rotary feed pump is released, the dome valve at the inlet of the rotary feed pump is opened, and the materials fall into the rotary feed pump from the storage bin under the action of gravity.
(3) When the material quantity in the rotary feeding pump covers the high material level in the rotary feeding pump, the feeding pump outlet dome valve, the exhaust valve and the inlet dome valve are sequentially closed, the punching and fluidization air source of the rotary feeding pump is opened, and the rotary feeding pump is pressurized and fluidized until the pressure is equal to the pressure in the conveying pipeline.
(4) The outlet valve of the rotary feeding pump is opened, the conveying gas is opened, the rotary feeder is started, and coal is supplied to the lime kiln spray gun.
(5) The two feeders below the blowing tank can be operated simultaneously or independently, and the blowing amount of each feeder can be adjusted independently.
(6) Each lime kiln has two kiln bores, and each kiln bore has 33 coal injection ports. The pulverized coal injection main pipelines are 2, one main pipeline is divided into 2 pipelines through a pipeline switching valve, and each pipeline is respectively connected with 16 injection ports of the corresponding kiln chamber through 1 distributor with 1 branch of 16 pipelines; the other main pipeline is divided into 2 pipelines through a pipeline switching valve, and each pipeline is respectively connected with 17 jetting ports of the corresponding kiln chamber through 1 distributor with 1 branch of 17 pipelines; each kiln chamber works at intervals of about 12-15 minutes to alternately spray coal.
In the whole conveying process, the conveying quantity can be adjusted at any time through a control system. The rotary feeding pump is provided with a weighing module, the actual conveying speed is calculated through the weighing system, and after the actual conveying speed is compared with the conveying speed set by the control system, the actual conveying speed reaches a set value through adjusting the rotating speed of the rotary feeding machine, so that the conveying precision is ensured.
The utility model has simple structure, convenient use and high blowing precision; the blowing is stable, and the material characteristics are not changed and the fluctuation of the kiln pressure is not influenced; the unique vertical rotary feeding structure design ensures that the coal injection system is smooth and has no fluctuation, and ensures that the pulverized coal is uniformly and stably injected in the pipeline without blockage; the frequency conversion speed regulation continuous quantitative feeding can realize on-line automatic adjustment of feeding quantity.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (2)
1. The pulverized coal injection conveying equipment for the double-hearth kiln is characterized in that: the device comprises a main air supply pipeline, a manual ball valve, an air filter, a pressure regulating valve, a first flexible section, a pressure gauge, a tail purging pipeline, a three-way pipe, a feeder outlet dome valve, a vertical rotary feeder, a control cabinet, a flange fluidization device, a pump body fluidization device, a landing leg assembly, a blowing tank, a weighing device, a first balance pipeline, an inlet dome valve, a third flexible section, a dome valve, an exhaust pipeline, a fourth flexible section, an exhaust dome valve, a level gauge and a top pressurization pipeline;
the injection tank, the vertical rotary feeder and the dome valve are used as main body components of the whole double-hearth kiln injection system, and the injection tank is connected with an inlet dome valve and a flexible joint III;
a flexible joint is arranged between the injection tank inlet dome valve and the exhaust dome valve, and a flexible sealing gasket is arranged at the joint surface; the pump body fluidization device is arranged around the blowing tank and consists of a fluidization base, a check valve, a throttle hole pipe and a nylon pipe; level gauges are respectively arranged above and below the blowing tank;
the outlet of the blowing tank is provided with a three-way pipe and a vertical rotary feeder, and the joint surface is sealed by adopting a metal winding gasket; the outlet of the vertical rotary feeder is provided with a feeder outlet dome valve, a three-way pipe is arranged below the feeder outlet dome valve, a flexible joint I is arranged on the left side of the three-way pipe, and a tail purging pipeline is arranged on the right side of the three-way pipe;
each lime kiln is provided with two kiln bores, 33 coal injection ports are arranged in each kiln bore, 2 main pulverized coal injection pipelines are arranged, one main pipeline is divided into 2 pipelines through a pipeline switching valve, and each pipeline is respectively connected with 16 injection ports of the corresponding kiln bores through 1 distributor with 1 part and 16 paths by using wear-resistant hoses; the other main pipeline is divided into 2 pipelines through a pipeline switching valve, and each pipeline is respectively connected with 17 jetting ports of the corresponding kiln chamber through 1 distributor with 1 branch of 17 pipelines; each kiln chamber works at intervals of about 12-15 minutes to alternately spray coal.
2. The dual-chamber kiln pulverized coal injection conveying device according to claim 1, wherein: the vertical rotary feeder is a double feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321534080.XU CN220541122U (en) | 2023-06-15 | 2023-06-15 | Pulverized coal injection conveying equipment for double-hearth kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321534080.XU CN220541122U (en) | 2023-06-15 | 2023-06-15 | Pulverized coal injection conveying equipment for double-hearth kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220541122U true CN220541122U (en) | 2024-02-27 |
Family
ID=89970173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321534080.XU Active CN220541122U (en) | 2023-06-15 | 2023-06-15 | Pulverized coal injection conveying equipment for double-hearth kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220541122U (en) |
-
2023
- 2023-06-15 CN CN202321534080.XU patent/CN220541122U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |