CN110817155A - Raw coal hopper structure for coal-fired power plant pulverizing system - Google Patents
Raw coal hopper structure for coal-fired power plant pulverizing system Download PDFInfo
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- CN110817155A CN110817155A CN201911257163.7A CN201911257163A CN110817155A CN 110817155 A CN110817155 A CN 110817155A CN 201911257163 A CN201911257163 A CN 201911257163A CN 110817155 A CN110817155 A CN 110817155A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
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- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses a raw coal bucket structure for a coal-fired power plant pulverizing system, which consists of a cylindrical section, a conical section and a hyperbolic section which is integrally in a hyperbolic tubular shape, wherein the cylindrical section, the conical section and the hyperbolic section are sequentially communicated from top to bottom, the inner diameters of the lower end of the cylindrical section and the upper end of the conical section are equal, the inner diameter of the upper end of the conical section is larger than that of the lower end of the conical section, the inner diameter of the lower end of the conical section is equal to that of the upper end of the hyperbolic section, and the inner diameter of the upper end of the hyperbolic section is larger than. The invention can prevent the occurrence of coal blockage on the premise of not greatly increasing the manufacturing cost.
Description
Technical Field
The invention relates to a coal pulverizing system of a coal-fired power plant, in particular to a raw coal hopper structure for the coal pulverizing system of the coal-fired power plant.
Background
Coal-fired power plants, referred to as thermal power plants for short, are plants that produce electrical energy using coal as a fuel. The basic production process is as follows: when the fuel is burnt, water is heated to generate steam, chemical energy of the fuel is converted into heat energy, the steam pressure pushes a steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives a generator to rotate, so that the mechanical energy is converted into electric energy. In order to enable coal to be sufficiently combusted, the coal needs to be made into coal powder through a coal pulverizing system, and the coal needs to be stored in a raw coal hopper firstly in the coal pulverizing process.
The circular silo device is a common raw material storage device, and in a coal-fired power plant, the circular silo device is mainly commonly used as a raw coal hopper between coal bunkers of the coal-fired power plant of a medium-speed mill direct-fired pulverizing system, and the raw coal hopper is usually designed into the following two schemes in the past:
scheme 1: a section of cylindrical section of thick bamboo + a section of truncated cone combination forms, see figure one, according to the power plant operation in-process feedback this structure type raw coal bunker is in the lower part exit end section about 3m upwards and easily appears the coal blocking phenomenon, and the coal blocking of raw coal fill causes serious influence for the normal production of power plant, also brings serious economic loss simultaneously.
Scheme 2: the raw coal bin with the structure type solves the coal blockage phenomenon of the coal bin to a certain extent, but the capacity of the hyperbolic barrel bin section is reduced greatly, so that the cylindrical barrel bin section needs to be increased to ensure the capacity of the bin, the capital construction investment is increased due to the increased height of the bin, and meanwhile, the longer the hyperbolic bin is, the higher the manufacturing difficulty of the hyperbolic bin is, the higher the manufacturing cost of the section is.
Disclosure of Invention
The invention aims to provide a raw coal hopper structure for a coal-fired power plant pulverizing system, which can prevent coal blockage on the premise of not greatly increasing the manufacturing cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a coal fired power plant powder process is former coal scuttle structure for system, comprises cylindricality section, toper section and the whole tubulose hyperbola section of hyperbolic curve, and cylindricality section, toper section and hyperbola section communicate in proper order from top to bottom, and the lower extreme of cylindricality section equals with the upper end internal diameter of toper section, and the upper end internal diameter of toper section is greater than its lower extreme internal diameter, and the lower extreme internal diameter of toper section equals with the upper end internal diameter of hyperbolic curve section, and the upper end internal diameter of hyperbolic curve section is greater than its lower extreme internal diameter.
In the raw coal hopper structure for the coal-fired power plant pulverizing system, the hyperbolic section is composed of a plurality of conical barrel-shaped structures which are communicated end to end, and the shrinkage rates of the conical barrel-shaped structures are equal.
In the raw coal hopper structure for a coal-fired power plant pulverizing system, the reduction of area of the tapered barrel structure is equal to C, (2/H) ln (d/d1), where H denotes the height of the tapered barrel structure, d denotes the inner diameter of the upper port of the tapered barrel structure, and d1 denotes the inner diameter of the lower port of the tapered barrel structure.
In the raw coal hopper structure for the coal pulverizing system of the coal-fired power plant, the shrinkage rate of the conical barrel-shaped structure is less than or equal to 0.7.
In the raw coal hopper structure for the coal pulverizing system of the coal-fired power plant, the inclination angle of the inner wall of the conical section is greater than or equal to 70 degrees.
Compared with the prior art, the invention can prevent the occurrence of coal blockage on the premise of not greatly increasing the manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of the structure of scheme 1 in the background art;
FIG. 2 is a flowchart of the operation of scheme 2 in the background art;
FIG. 3 is a schematic structural diagram of one embodiment of the present invention;
FIG. 4 is a schematic diagram of the structure of one embodiment of a hyperbolic segment.
Reference numerals: 1-cylindrical section, 2-conical section, 3-hyperbolic section, 4-conical barrel structure.
The invention is further described with reference to the following figures and detailed description.
Detailed Description
Example 1 of the invention: the utility model provides a coal fired power plant powder process is former coal scuttle structure for system, by cylindricality section 1, toper section 2 and whole one-tenth double curve tubulose hyperbola section 3 constitute, cylindricality section 1, toper section 2 and hyperbola section 3 communicate in proper order from top to bottom, the lower extreme of cylindricality section 1 equals with the upper end internal diameter of toper section 2, the upper end internal diameter of toper section 2 is greater than its lower extreme internal diameter, the lower extreme internal diameter of toper section 2 equals with the upper end internal diameter of hyperbola section 3, the upper end internal diameter of hyperbola section 3 is greater than its lower extreme internal diameter. The inclination of the inner wall of said conical section 2 is equal to 70 degrees.
The hyperbolic curve section 3 is composed of a plurality of conical barrel-shaped structures 4 which are communicated end to end, and the shrinkage rates of the conical barrel-shaped structures 4 are equal. The shrinkage of the conical barrel-shaped structure 4 is equal to 0.7.
The reduction of area of the tapered barrel structure 4 is equal to C, (2/H) ln (d/d1), where H denotes the height of the tapered barrel structure 4, d denotes the upper port inner diameter of the tapered barrel structure 4, and d1 denotes the lower port inner diameter of the tapered barrel structure 4.
Because of the great difficulty in directly using smooth hyperbolas to make the hyperbola cylinder in engineering, the cylinder is simplified into a plurality of sections of equal-height round tables to replace the hyperbola cylinder, but the shrinkage rates of each section of equal-height round tables are basically equal, namely: c ═ 2/h4 × ln (d2/d1) ═ 2/h4 × ln (d3/d2) ═ 2/h4 × ln (d4/d3) … …, and its value is less than or equal to 0.7.
Comparing the quality of the raw coal hopper structures in the scheme 1 and the scheme 2 in the background art and the patent application, wherein the list is as follows:
Claims (5)
1. the utility model provides a coal fired power plant powder process is raw coal fill structure for system, a serial communication port, by cylindricality section (1), toper section (2) and whole one-tenth hyperbolic curve pipy hyperbolic curve section (3) are constituteed, cylindricality section (1), toper section (2) and hyperbolic curve section (3) communicate from top to bottom in proper order, the lower extreme of cylindricality section (1) and the upper end internal diameter of toper section (2) equal, the upper end internal diameter of toper section (2) is greater than its lower extreme internal diameter, the lower extreme internal diameter of toper section (2) and the upper end internal diameter of hyperbolic curve section (3) equal, the upper end internal diameter of hyperbolic curve section (3) is greater than its lower extreme internal diameter.
2. The raw coal hopper structure for the coal-fired power plant pulverizing system of claim 1, characterized in that the hyperbolic section (3) is composed of a plurality of tapered barrel structures (4) which are communicated end to end, and the shrinkage rates of the tapered barrel structures (4) are all equal.
3. The raw coal hopper structure for a coal-fired power plant pulverizing system of claim 2, characterized in that the reduction of area of the conical barrel structure (4) is equal to C, (2/H) ln (d/d1), wherein H represents the height of the conical barrel structure (4), d represents the upper port inner diameter of the conical barrel structure (4), and d1 represents the lower port inner diameter of the conical barrel structure (4).
4. The raw coal hopper structure for a coal-fired power plant pulverizing system according to claim 3, characterized in that the shrinkage rate of the conical barrel-shaped structure (4) is less than or equal to 0.7.
5. The raw coal hopper structure for a coal pulverizing system of a coal-fired power plant as set forth in claim 1, characterized in that the inclination angle of the inner wall of the tapered section (2) is greater than or equal to 70 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257163.7A CN110817155A (en) | 2019-12-10 | 2019-12-10 | Raw coal hopper structure for coal-fired power plant pulverizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257163.7A CN110817155A (en) | 2019-12-10 | 2019-12-10 | Raw coal hopper structure for coal-fired power plant pulverizing system |
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| CN110817155A true CN110817155A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911257163.7A Pending CN110817155A (en) | 2019-12-10 | 2019-12-10 | Raw coal hopper structure for coal-fired power plant pulverizing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115258431A (en) * | 2022-08-16 | 2022-11-01 | 国能宝清煤电化有限公司 | Raw coal bin body structure |
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2019
- 2019-12-10 CN CN201911257163.7A patent/CN110817155A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115258431A (en) * | 2022-08-16 | 2022-11-01 | 国能宝清煤电化有限公司 | Raw coal bin body structure |
| CN115258431B (en) * | 2022-08-16 | 2023-08-08 | 国能宝清煤电化有限公司 | Raw coal bin body structure |
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