CN213577557U - Static even diffusion equipment of power station buggy pipeline - Google Patents
Static even diffusion equipment of power station buggy pipeline Download PDFInfo
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- CN213577557U CN213577557U CN202022395992.6U CN202022395992U CN213577557U CN 213577557 U CN213577557 U CN 213577557U CN 202022395992 U CN202022395992 U CN 202022395992U CN 213577557 U CN213577557 U CN 213577557U
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Abstract
The utility model discloses a static even diffusion equipment of power station buggy pipeline installs in the buggy pipeline between coal pulverizer export to furnace combustor, makes the device of the even diffusion of the inhomogeneous buggy granule of distribution in the buggy air current in the pipeline. Static diffusion elements are installed on the coal powder flow path in the pipeline, and the elements are transversely installed on the coal powder pipeline and are a plurality of rows of tooth-shaped baffles which are mutually staggered and overlapped. The pre-diffusion guide plate is arranged at the inlet of the pipeline, so that the pulverized coal airflow firstly passes through the pre-diffusion guide plate when entering the pipeline, and the pulverized coal airflow flows to the center of the pipeline from the periphery of the pipeline at a certain angle, so that the pulverized coal airflow flows through the diffusion elements arranged in the pipeline, and the pulverized coal airflow is more uniform when diffusing in the pipeline.
Description
Technical Field
The utility model belongs to the technical field of electric power and power engineering, a static even diffusion equipment of power station buggy pipeline is related to.
Background
In a thermal power plant, a coal mill grinds lump raw coal into pulverized coal, the pulverized coal and primary air are combined into a pulverized coal airflow in the coal mill, the pulverized coal airflow is conveyed to a burner through a pulverized coal pipeline, and then the pulverized coal airflow is combusted in a hearth.
When transporting pulverized coal flows in pulverized coal pipelines, the pulverized coal flows in each pulverized coal pipeline are required to be relatively uniform. If the concentration of the pulverized coal of a part of combustors is not uniform, the pulverized coal particles can be incompletely combusted in the boiler, the heat loss caused by incomplete combustion of solids is increased, and the boiler efficiency is reduced; if the concentration of the pulverized coal of part of the burners is not uniform, incomplete combustion in the furnace can occur, and the emission of nitrogen oxides is increased; if the concentration of the pulverized coal of part of the burners is not uniform, flame in the furnace can be brushed, so that the tube bundle of the water-cooled wall is thinned and burst. If coal dust accumulation occurs in the coal dust pipeline, explosion accidents of the coal dust pipeline can be caused.
At present, a coal powder distributor is commonly used for distributing coal powder airflow from a main pipe to each branch pipe, and a series of guide plates and guide strips with different angles are usually arranged at the branch position of a pipeline of the coal powder distributor. The schematic diagram of the coal powder distributor is shown in fig. 1, and the actual operation condition shows that the coal powder is not uniformly distributed in each branch pipeline at the downstream of the coal powder distributor, and relatively obvious dense-thin subareas of dense-side coal powder airflow and thin-side coal powder airflow exist. Fig. 1 shows the arrangement of a coal pulverizing system and an outlet coal powder pipeline, wherein a branch of the coal powder conveying pipeline is provided with a coal powder distributor to describe the effect of the coal powder distributor on coal powder separation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the problem among the prior art, provide a static even diffusion equipment of power station buggy pipeline, this system can make the dense side buggy air current in the pipeline mix each other with the weak side buggy air current, can arrange in the low reaches pipeline of buggy distributor, can make buggy air current evenly distributed on pipeline cross section direction.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a static uniform diffusion device for a pulverized coal pipeline of a power station comprises:
the coal mill is connected with the first-stage coal powder distributor through a main pipeline;
the outlet of the first coal powder distributor is connected with two paths of one-to-two pipelines, and the outlets of the two paths of one-to-two pipelines are respectively connected with a second coal powder distributor;
the outlet of each second coal powder distributor is connected with two paths of four-in-two pipelines, and the outlets of the four-in-two pipelines are communicated with the boiler hearth;
the diffusion device is arranged on the main pipeline and the two one-to-two pipelines.
The utility model discloses further improvement lies in:
the diffusion device comprises a shell, the shell is a pulverized coal channel with openings at two ends, and the shape and the size of the shell are matched with those of the main pipeline; a plurality of diffusion elements are disposed within the housing.
The coal dust pre-diffusion device is characterized in that a pre-diffusion guide plate is arranged at an inlet at the front end of the coal dust channel, and the pre-diffusion guide plate comprises a plurality of tooth-shaped baffles which are symmetrically arranged with equal-height teeth and arranged at the position where coal dust airflow flows through at the concentrated side.
The diffusion component is static diffusion component, static diffusion component upstream and downstream staggered arrangement, each static diffusion component includes the mounting at both ends, the mounting is fixed on the inner wall of shell, sets up the profile of tooth baffle between two mountings, the upper and lower surface of profile of tooth baffle all is provided with a plurality of high teeth and low tooth that are used for playing the diffusion effect to the buggy, high tooth and low tooth alternate arrangement.
The fixing piece is fixed on the inner wall of the shell through a bolt.
The bottom of the shell is provided with an inspection port for inspecting the static diffusion element.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses pulverized coal pipeline diffusion system, raw coal transport to the coal pulverizer inside through the coal feeder, dry through hot primary air in the coal pulverizer, are ground into the buggy by the coal pulverizer to send to export buggy pipeline by a wind. The coal powder airflow is distributed in the coal powder pipeline unevenly, heavier particles are converged into the thick-side coal powder airflow, lighter particles are converged into the light-side coal powder airflow, and the main pipe and the branch pipes are both in the condition. The coal powder with uneven concentration flows through the pre-diffusion guide plate firstly, so that the coal powder airflow flows to the center of the pipeline from the periphery of the pipeline at a certain angle, and the coal powder airflow can be more uniformly diffused in the pipeline when flowing through the diffusion elements arranged in the pipeline, and can be basically uniformly distributed at the outlet of the pipeline. Therefore, the concentration of the pulverized coal in each branch pipe is relatively uniform, the concentration of the pulverized coal of each combustor in the hearth is basically the same, ignition and combustion of the pulverized coal in the boiler are facilitated, the thermal load of each combustor is basically the same, the overall flame of the hearth is relatively stable, and the combustion state of the boiler is facilitated to be improved. The utility model discloses an arrange that the principle is simple, the construction installation degree of difficulty is little, can be used to the unit transformation also can be used to new unit construction, have higher practicality.
Further, the utility model discloses, install static diffusion component on the buggy flow path in the pipeline, the component is transversely installed on the buggy pipeline, for multirow profile of tooth baffle, and crisscross and overlapping are arranged each other.
Furthermore, the tooth-shaped baffle diffusion element of the utility model can be pointed, square or round, and the tooth-shaped baffle has the height that is alternately high and low and is continuously changed in the height direction of the diffusion unit, so that the pulverized coal airflow can be disturbed into the form of uniform distribution. The diffusion element with larger teeth is arranged in the area where the pulverized coal airflow is higher in density and the pulverized coal airflow is gathered.
Further, the utility model is suitable for a square pipeline also is applicable to the circle pipeline, and wherein the circle pipeline need dispose the square and change the circle and connect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a coal pulverizing system and an outlet coal powder pipeline in the prior art, in which a branch of a coal powder conveying pipeline is provided with a coal powder distributor to describe the effect of the coal powder distributor on coal powder separation;
FIG. 2 is a cross-sectional view of the pulverized coal piping uniform diffusion system of the present invention;
fig. 3 is the schematic view of the internal structure of the pulverized coal pipe uniform diffusion system of the present invention.
Wherein: 1-coal mill, 2-main pipeline, 3-coal powder distributor, 4-dense side coal powder airflow, 5-light side coal powder airflow, 6-adjusting baffle, 7-uniform coal powder airflow, 8-shell, 9-shell inlet section, 10-shell outlet section, 11-static diffusion element, 12-bolt, 13-high tooth, 14-low tooth, 15-prediffusion deflector, 16-inspection opening and 17-second coal powder distributor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 2, the utility model discloses static even diffusion equipment of power station coal dust pipeline, including coal pulverizer 1, and main pipe 2 that sets up in the export of coal pulverizer 1, be provided with diffusion equipment on main pipe 2, be provided with first buggy distributor 3 behind main pipe 2 to connect two one in two pipelines behind first buggy distributor 3, be provided with diffusion equipment on one in two pipelines, be provided with second buggy distributor 17 behind one in two pipelines, and connect two half four pipelines behind second buggy distributor 17.
As shown in fig. 1, in the existing coal mill and its outlet coal powder conveying pipeline system, a coal powder distributor is provided at each branch pipeline, and the distributor is used to distribute coal powder uniformly. At present, a coal powder distributor is commonly used for distributing coal powder airflow from a main pipe to each branch pipe, and a series of guide plates and guide strips with different angles are usually arranged at the branch position of a pipeline of the coal powder distributor. Actual operation conditions show that in each branch pipeline at the downstream of the coal powder distributor, the distribution of coal powder is not uniform, and relatively obvious dense-dilute subareas of dense-side coal powder airflow and dilute-side coal powder airflow exist.
The utility model discloses can be used to install the coal powder system of buggy distributor also can be used to not install the system of buggy distributor, install all can gain better buggy evenly distributed effect on the buggy pipeline. The raw coal is conveyed to the interior of the coal mill through the coal feeder, dried by hot primary air in the coal mill, ground into coal powder by the coal mill, and conveyed to the outlet coal powder conveying pipeline 2 by the primary air. An adjusting baffle 6 can be arranged in the pulverized coal conveying pipeline 2 and is used for guiding pulverized coal airflow from one side of the pipeline to the other side. The adjusting baffle 6 is usually used in conjunction with the coal dust distributor 4, and the purpose thereof is to enable the unevenly distributed coal dust flow to flow relatively uniformly to the downstream duct, but the actual coal dust homogenizing effect cannot be expected. The coal powder airflow is distributed in the coal powder pipeline unevenly, heavier particles are converged into the thick-side coal powder airflow 4, lighter particles are converged into the light-side coal powder airflow 5, and the situation occurs in the main pipe and the branch pipes. As can be seen in fig. 1, the coal fines distributor does not effectively eliminate the original maldistribution problem caused by the separation of heavier and lighter particles in the pulverized coal stream exiting the coal pulverizer. The utility model discloses can effectively solve this problem, the utility model is suitable for a steel ball coal pulverizer also is applicable to the intermediate speed coal pulverizer.
Examples
As shown in fig. 2 and 3, the diffuser is a static diffuser element 11 in this embodiment, and the position of the static diffuser element 11 corresponds approximately to the position of the adjusting baffle 6 in fig. 2 in the conveying pipe. The utility model discloses a shell be one with 2 assorted shells 8 of buggy pipeline. Shell 8 and pipeline phase-match, the utility model discloses also be applicable to circular and other shape pipelines.
The static diffusing elements 11 in this embodiment are provided in a plurality, arranged in the lateral direction of the flow of the coal powder gas in the casing 8, preferably in an upstream-downstream staggered arrangement as shown in fig. 2 and 3. The static diffusing elements 11 are arranged alternately, generally symmetrically, by a plurality of transverse high 13 and low 14 teeth. The high teeth 13 and the low teeth 14 may be triangular pointed, or may be rounded or squared. In this embodiment, the material of the static diffusion element 11 is a wear-resistant metal material.
The shell inlet section 9 and the shell outlet section 10 of the shell 8 are connected with the conveying pipeline by adopting bolts, flanges or welding. When the static diffuser element 11 is not used with the housing 8, the static diffuser element 11 may be installed directly within the delivery conduit as part of the delivery conduit.
The pre-diffusion guide plate 15 is arranged at the inlet section 9 of the shell, and the pre-diffusion guide plate 15 is formed by tooth-shaped baffles with equal-height teeth which are symmetrically arranged and is arranged on the surface through which the pulverized coal airflow 4 at the dense side flows.
The pre-diffusion guide plate 15 is arranged at the inlet of the pipeline, so that the pulverized coal airflow firstly passes through the pre-diffusion guide plate when entering the pipeline, and the pulverized coal airflow flows to the center of the pipeline from the periphery of the pipeline at a certain angle, so that the pulverized coal airflow is more uniform when diffusing in the pipeline when flowing through the static diffusion element 11 arranged in the pipeline, and can be basically uniformly distributed at the outlet of the pipeline. The prediffusion flow guide plate 15 installed at the inlet of the pipeline plays a certain prediffusion role for the static diffusion elements 11, and ensures that the main flow of the pulverized coal can flow through all three static diffusion elements 11 arranged in the pipeline to realize uniform diffusion. The optimum angle of the pre-diffusing baffle 15 is towards the centre point of the duct, typically towards the frontmost diffusing element. Another arrangement of the pre-diffusion flow guide plates 15 is that the pre-diffusion flow guide plates 15 are arranged on the other three sides of the inlet of the shell, that is, the pre-diffusion flow guide plates 15 are arranged on the periphery of the shell. The three static diffusion elements 11 can be used independently without arranging the pre-diffusion flow guide plates 15, or the static diffusion elements 11 and the pre-diffusion flow guide plates 15 can be arranged simultaneously, depending on the distribution condition of the pulverized coal in the pipeline and the diffusion effect required to be achieved.
The static diffuser element 11 can be placed anywhere in the coal dust conveying duct system from the coal mill outlet to the furnace burners, the optimum position for the diffuser element to be placed being upstream of the main duct to the branch duct coal dust distributor.
The static diffuser elements 11 are fixed to the housing 8 on both sides by bolts 12, and the static diffuser elements 11 may be fixed to the housing by other means such as welding. In order to replace worn static diffuser elements and to perform maintenance work on the static diffuser elements, an inspection opening 16 is arranged in the housing 8, through which the static diffuser elements can be serviced, maintained and replaced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a static even diffusion equipment of power station buggy pipeline which characterized in that includes:
the coal mill (1), the coal mill (1) is connected with the first coal powder distributor (3) through a main pipeline (2);
the outlet of the first coal powder distributor (3) is connected with two paths of one-to-two pipelines, and the outlets of the two paths of one-to-two pipelines are respectively connected with a second coal powder distributor (17);
the outlets of the second coal powder distributors (17) are connected with two paths of four-in-two pipelines, and the outlets of the four-in-two pipelines are communicated with the boiler hearth;
the diffusion device is arranged on the main pipeline (2) and the two one-to-two pipelines.
2. The static uniform diffusion device of the power station coal dust pipeline according to claim 1, characterized in that the diffusion device comprises a shell (8), the shell (8) is a coal dust channel with openings at two ends, and the shape and size of the shell (8) are matched with those of the main pipeline (2); a plurality of diffusion elements are arranged in the shell (8).
3. The static uniform diffusion device of the pulverized coal pipeline of the power station as claimed in claim 2, characterized in that the inlet at the front end of the pulverized coal channel is provided with a pre-diffusion guide plate (15), and the pre-diffusion guide plate (15) comprises a toothed baffle plate which is symmetrically arranged for a plurality of teeth with equal height and is arranged at the position where the pulverized coal airflow (4) at the dense side flows through.
4. The static uniform diffusion device of the power station coal dust pipeline according to claim 2 or 3, characterized in that the diffusion elements are static diffusion elements (11), the static diffusion elements (11) are arranged in a staggered manner upstream and downstream, each static diffusion element (11) comprises fixing pieces at two ends, the fixing pieces are fixed on the inner wall of the shell (8), a tooth-shaped baffle is arranged between the two fixing pieces, the upper surface and the lower surface of the tooth-shaped baffle are provided with a plurality of high teeth (13) and low teeth (14) which are used for diffusing coal dust, and the high teeth (13) and the low teeth (14) are arranged alternately.
5. The plant coal dust duct static uniform diffusion device according to claim 4, characterized in that the fixing piece is fixed on the inner wall of the housing (8) by means of bolts (12).
6. The static uniform diffusion device of the utility coal dust pipeline according to claim 4, characterized in that the bottom of the casing (8) is provided with an inspection opening (16) for inspecting the static diffusion element.
7. The plant coal dust duct static uniform diffusion device according to claim 4, characterized in that the high teeth (13) and the low teeth (14) are triangular, square or circular.
8. The static uniform diffusion device of a utility coal dust pipeline according to claim 4, characterized in that the material of the toothed baffle is a wear-resistant metal material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022395992.6U CN213577557U (en) | 2020-10-23 | 2020-10-23 | Static even diffusion equipment of power station buggy pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022395992.6U CN213577557U (en) | 2020-10-23 | 2020-10-23 | Static even diffusion equipment of power station buggy pipeline |
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| CN213577557U true CN213577557U (en) | 2021-06-29 |
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| CN202022395992.6U Active CN213577557U (en) | 2020-10-23 | 2020-10-23 | Static even diffusion equipment of power station buggy pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146121A (en) * | 2020-10-23 | 2020-12-29 | 西安热工研究院有限公司 | Uniform diffusion system for pulverized coal pipeline of power station |
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- 2020-10-23 CN CN202022395992.6U patent/CN213577557U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146121A (en) * | 2020-10-23 | 2020-12-29 | 西安热工研究院有限公司 | Uniform diffusion system for pulverized coal pipeline of power station |
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