CN202527375U - Low-resistance coal dust thick/thin separating device with coal dust concentration measuring function - Google Patents
Low-resistance coal dust thick/thin separating device with coal dust concentration measuring function Download PDFInfo
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- CN202527375U CN202527375U CN2012200290049U CN201220029004U CN202527375U CN 202527375 U CN202527375 U CN 202527375U CN 2012200290049 U CN2012200290049 U CN 2012200290049U CN 201220029004 U CN201220029004 U CN 201220029004U CN 202527375 U CN202527375 U CN 202527375U
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Abstract
The utility model relates to a low-resistance coal dust thick/thin separating device with a coal dust concentration measuring function, which is characterized by comprising a venturi coal dust thick/thin separating device; the venturi coal dust thick/thin separating device comprises a contraction section, a throat section, an expansion section and a stabilizing section; and a first pressure-transferring thin tube and a second pressure-transferring thin tube are respectively arranged in the throat section and the stabilizing section. The low-resistance coal dust thick/thin separating device with the coal dust concentration measuring function has the beneficial effects: the resistance loss of coal dust airflow at each corner can be measured by utilizing the pressure difference generated by a venturi tube; the relative coal dust concentration of each combustor can be on-line detected, so as to adjust the combustion running condition of a boiler; and the device has two paths of airflows for effectively dividing primary air into coal dust thick and thin phases, thereby being beneficial to ignition and full combustion of the coal dust.
Description
Technical field
The utility model relates to a kind of low-resistance coal powder light-dark separation device with the coal powder density measurement function.
Background technology
Five subject matters that China's coal-fired power station boiler faces the burning aspect are: efficiency of combustion, low-load combustion-stabilizing, lowly pollute, prevent slagging scorification and high temperature corrosion.These five problems must be unified to consider, rationally solve, and station boiler could safety and economical operation.But these problem-solving approaches are conflicting often.As effective measures that reduce the NOx discharge capacity are to improve the coal powder density of combustion zone, postpone and mixing, but be unfavorable for preventing slagging scorification and influence efficiency of combustion.Improving the combustion zone temperature can overheavy firing, improve efficiency of combustion, but might cause high temperature corrosion and the excessive generation of NOx.Therefore research solves high efficiency simultaneously, low-load combustion-stabilizing, and low the pollution prevents slagging scorification and prevents that the burner of these five aspect problems of high temperature corrosion has crucial meaning.Therefore, the coal powder direct supplying burner with above five combination properties just arises at the historic moment, and horizontal bias segregated combustion device is wherein arranged; Wide regulating ratio WR burner; 4PM burners etc. realize that wherein general mood of coal dust flows having of deep or light separation, louver separator; Concentrated ring adds gimbal separator and various blade cyclone separator, comprises deep or light segregated combustion device of the vane type that is exclusively used in corner tangential firing that United States Patent (USP) 5535686 discloses etc.Purpose at above many light-dark separation devices is nothing but that the dense phase pulverized coal air-flow catches fire easily, and institute's calorific requirement is few, but a common shortcoming is arranged is to have increased pulverized coal preparation system to get resistance and power consumption for they.On the other hand in order to realize that the coal dust on four angles of NOx burning hope should as much as possible evenly distribute; Though but the measuring technique of coal powder density has such as heat balance method of; Capacitance method; The heat transfer method, energy method and utilize cutting edge technologies such as photoelectricity, microwave and ultrasonic wave, but all more complicated with install and use spend bigger.
Summary of the invention
The purpose of the utility model has provided a kind of low-resistance coal powder light-dark separation device with the coal powder density measurement function.
In order to achieve the above object; The utility model provides a kind of low-resistance coal powder light-dark separation device with the coal powder density measurement function; It is characterized in that; Comprise the venturi coal powder light-dark separation device, described venturi coal powder light-dark separation device comprises contraction section, aditus laryngis section, expanding section and stable section, is respectively equipped with the first pressure transmission tubule and the second pressure transmission tubule in described aditus laryngis section and the stable section.
Preferably, the described first pressure transmission tubule all links to each other with the differential manometer device of charged signal output with the second pressure transmission tubule.
Compared with prior art, the beneficial effect of the utility model is:
The pressure reduction that 1, can utilize Venturi tube to produce is measured the drag losses of breeze airflow on each angle, and can online calculate coal powder density, and then the boiler operatiopn operating mode is regulated.
2, can a wind effectively be divided into mutually two strands of air-flows of coal powder light-dark, help lighting and the abundant burning of coal dust.
Description of drawings
Fig. 1 is the low-resistance coal powder light-dark separation device structural representation of band coal powder density measurement function.
The specific embodiment
Specify the utility model below in conjunction with embodiment.
Embodiment
As shown in Figure 1; Low-resistance coal powder light-dark separation device structural representation for band coal powder density measurement function; The low-resistance coal powder light-dark separation device structure of described band coal powder density measurement function comprises the venturi coal powder light-dark separation device; Described venturi coal powder light-dark separation device is made up of contraction section 1, aditus laryngis section 2, expanding section 3 and stable section 4, is respectively equipped with the first pressure transmission tubule 5 and the second pressure transmission tubule 6 in described aditus laryngis section 2 and the stable section 4.Aditus laryngis section 2 should be lacked as much as possible, as long as can draw tubule.Pressure transmission tubule on each angle of burner hearth can be received the differential manometer device of charged signal output.
Can realize the separation of coal powder light-dark phase through the venturi coal powder light-dark separation device, measure the pressure P of aditus laryngis sections 2 through the first pressure transmission tubule 5 and the second pressure transmission tubule 6
1Pressure P with stable section 4
2, when coal powder density (coal/air)
μWhen between 0.29～0.49kg/kg, changing, can calculate the coal powder density value according to following formula:
Wherein, △ P is a Dual-Phrase Distribution of Gas olid drag losses measured value,
, △ P
0Be the drag losses measured value of pure air condition,
KBe resistance proportionality coefficient test value,
μBe coal powder density (kg/kg).
The △ P that records on four angles of burner hearth has reflected the big or small at the resistance that is flowing to each angle of breeze airflow, has also reflected the size of the coal powder density between them.Therefore can measure △ P before boiler operatiopn or in the time between overhaul
0With
K, on-line measurement when boiler operatiopn then
, and calculate coal powder density and in computer system, show, and as participating in one of input data that boiler combustion regulates.
Claims (2)
1. low-resistance coal powder light-dark separation device with the coal powder density measurement function; It is characterized in that; Comprise the venturi coal powder light-dark separation device; Described venturi coal powder light-dark separation device comprises contraction section (1), aditus laryngis section (2), expanding section (3) and stable section (4), is respectively equipped with the first pressure transmission tubule (5) and the second pressure transmission tubule (6) in described aditus laryngis section (2) and the stable section (4).
2. the low-resistance coal powder light-dark separation device of band coal powder density measurement function as claimed in claim 1 is characterized in that, the described first pressure transmission tubule (5) all links to each other with the differential manometer device of charged signal output with the second pressure transmission tubule (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200290049U CN202527375U (en) | 2012-01-29 | 2012-01-29 | Low-resistance coal dust thick/thin separating device with coal dust concentration measuring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200290049U CN202527375U (en) | 2012-01-29 | 2012-01-29 | Low-resistance coal dust thick/thin separating device with coal dust concentration measuring function |
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| CN202527375U true CN202527375U (en) | 2012-11-14 |
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| CN2012200290049U Expired - Lifetime CN202527375U (en) | 2012-01-29 | 2012-01-29 | Low-resistance coal dust thick/thin separating device with coal dust concentration measuring function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498648A (en) * | 2014-09-24 | 2016-04-20 | 中国石油大学(北京) | Hydration reactor, and method therewith for separating methane from coalbed methane-air mixture |
| CN105864759A (en) * | 2016-04-07 | 2016-08-17 | 山东中科洁能科技有限公司 | Novel low-nitrogen pulverized coal combustor |
-
2012
- 2012-01-29 CN CN2012200290049U patent/CN202527375U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498648A (en) * | 2014-09-24 | 2016-04-20 | 中国石油大学(北京) | Hydration reactor, and method therewith for separating methane from coalbed methane-air mixture |
| CN105498648B (en) * | 2014-09-24 | 2017-11-28 | 中国石油大学(北京) | A kind of hydration reactor and the method for mixing methane in empty coal bed gas using reactor separation |
| CN105864759A (en) * | 2016-04-07 | 2016-08-17 | 山东中科洁能科技有限公司 | Novel low-nitrogen pulverized coal combustor |
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Granted publication date: 20121114 |
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| CX01 | Expiry of patent term |