CN203162964U - Paper sludge combustion apparatus capable of preventing water walls from scorification and corrosion - Google Patents
Paper sludge combustion apparatus capable of preventing water walls from scorification and corrosion Download PDFInfo
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- CN203162964U CN203162964U CN 201320169471 CN201320169471U CN203162964U CN 203162964 U CN203162964 U CN 203162964U CN 201320169471 CN201320169471 CN 201320169471 CN 201320169471 U CN201320169471 U CN 201320169471U CN 203162964 U CN203162964 U CN 203162964U
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- mud
- sludge
- paper mill
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Abstract
The utility model discloses a paper sludge combustion apparatus capable of preventing water walls from scorification and corrosion. Through the action of elbows, sludge is separated according to density by the centrifugal force so as to ensure that a great amount of sludge airflow is burned in a central area in a furnace chamber, and meanwhile, surrounding air is introduced to form an oxidation atmosphere around the water walls so as to separate the water walls from the reducing atmosphere of the central combustion area. The paper sludge combustion apparatus comprises the furnace chamber which is surrounded by the water walls; the cross section of the furnace chamber is an octagon, and among the eight edges of the octagon, every two adjacent edges have only one sludge nozzle, and the sludge nozzle is communicated with the interior of the furnace chamber; a bluff body is arranged in the middle of the sludge nozzle and divides the sludge nozzle into an internal airflow nozzle and an external airflow nozzle; the center lines of the internal airflow nozzle and the external airflow nozzle are tangent to the inner hypothetical tangent circle and the outer hypothetical tangent circle of the furnace chamber respectively; and the sludge nozzle is communicated with a primary air pipeline through an elbow, an oxidation air pipeline is arranged in the primary air pipeline, and the oxidation air pipeline is communicated with the external airflow nozzle.
Description
Technical field
The utility model relates to a kind of paper mill sludge burner, is specifically related to a kind of paper mill sludge burning low emission device that prevents water-cooling wall slagging scorification and corrosion.
Background technology
Paper mill sludge is a kind of discarded object of complicated component, mainly comprises insoluble fibrin and filler, flocculating agent etc., because water content height (more than 60%), complicated component and the processing and utilizing difficulty is big.If it is not dealt carefully with and to cause serious secondary pollution.A large amount of harmful substances is to exist with organic form in the mud, has certain calorific value, can burn.Burning back generates the material of environmental sounds such as carbon dioxide and water, and therefore burning is the valid approach the most of sludge reduction, innoxious, recycling.
Sludge incineration is under the condition of uniform temperature, the abundant aerobic of gas phase, makes the organic matter generation combustion reaction in the mud, and changes into CO
2, H
2O, N
2Etc. corresponding gaseous substance, comprise evaporation, volatilization, decomposition, sintering, dissolve and redox reaction, and comprehensive physical change and the chemical reaction process of corresponding mass transfer and heat transfer.Sludge incineration can significantly reduce the volume of mud, and with respect to the mud of mechanical dehydration, final incineration ashes volume only is equivalent to 10% of initial product.Sludge incineration simultaneously can be killed all pathogen, by high-temperature process, does not almost have pathogen to exist in the combustion residue, thoroughly solves the stench problem of mud.In recent years, because it has that speed is fast, floor space is little, does not need remarkable advantage such as long term storage, sludge incineration has become main developing direction and the research focus of Treatment of Sludge, more and more is subjected to the favor of countries in the world.
The paper mill sludge content of ashes is 40%～60%, can produce a large amount of molten ash in the combustion process, in case molten ash touched water-cooling wall before solidifying, and will slagging scorification.Simultaneously, contain a large amount of alkali metals in the paper mill sludge, chlorine element and element sulphur content are also more.In the combustion process, a large amount of chlorine, element sulphur and volatile alkali metal (as: mainly being potassium and sodium) enter into flue gas with the steam form, can form the alkali metal chloride (potassium chloride and sodium chloride) of micron particles by homogeneous reaction, condense and be deposited on the tube wall, and with sulfur in smoke generation sulfation reaction, generate chlorine.Chlorine under reducing atmosphere can with tube wall in ferro element and chromium element react, it is cemented out from tube wall, finally cause serious corrosion.In case tube wall generation slagging scorification and corrosion can cause significant impact to the safe and economical boiler operation.
Chinese patent CN101315184A discloses the horizontal rich-lean direct current combustion device that a kind of wall formula is arranged, at water-cooling wall a plurality of dense wind snouts, a plurality of light wind snouts and a plurality of overfire air port are set and form one group of horizontal bias burner, quadrangle tangential circle is arranged.Overfire air port in every group of burner and a dense wind snout and a light wind snout alternatively up and down are arranged, a dense wind snout and a light wind snout are arranged in the same horizontal plane, coal dust jet tonifying Qi condition is improved greatly, alleviated water-cooling wall slagging scorification and high temperature corrosion.Be beneficial to steady combustion, underload and low NO to boiler simultaneously
XDischarging.
Chinese patent CN101050854A discloses a kind of W type flame boiler that prevents side wall water cooling wall slagging scorification, at the adherent wind bellows of burner hearth aileron arranged outside, and be provided with ventilation gaps at aileron, and near water-cooling wall, form oxidizing atmosphere by introducing adherent wind, reach the purpose that prevents slagging scorification.
But because ash content, alkali metal and the content of Cl element of paper mill sludge are all than content height in the coal dust, need near water-cooling wall, form stronger oxidizing atmosphere, more than two utility models can alleviate the slagging scorification of pulverized-coal fired boiler water-cooling wall and corrosion Chengdu, but for preventing in the paper mill sludge combustion process that slagging scorification and corrosion to water-cooling wall can't reach good effect, and complex structure.Therefore, need a kind ofly can realize preventing water-cooling wall slagging scorification and corrosion in the paper mill sludge combustion process, and the new equipment of nitrogen oxide low emission and technology.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, a kind of paper mill sludge burner that prevents water-cooling wall slagging scorification and corrosion being provided.The utility model fully utilizes deep or light isolation technics and introducing oxidation wind technology, by the elbow effect, utilizes centrifugal force to realize the deep or light separation of mud, guarantees that a large amount of mud air-flows burn in the burner hearth central area.Introduce the bigger oxidation wind of air quantity simultaneously and around water-cooling wall, form oxidizing atmosphere, the reducing atmosphere of central combustion zone is separated with water-cooling wall, avoid ash fusion point reduction and tube wall temperature too high, also prevent simultaneously the reaction of chlorine and tube wall metallic element, reached the purpose that prevents water-cooling wall slagging scorification and corrosion.
For achieving the above object, the utility model adopts following technical proposals:
A kind of paper mill sludge burner that prevents water-cooling wall slagging scorification and corrosion, be covered with the burner hearth of water-cooling wall around comprising, the cross section of described burner hearth is octagon, in described octagonal eight limits, there is and only has a mud nozzle on every adjacent two edges, the internal communication of described mud nozzle and burner hearth; The centre position of described mud nozzle is provided with bluff body, air current spray nozzle and outer air current spray nozzle in described bluff body is divided into the mud nozzle, and the center line of described interior air current spray nozzle and outer air current spray nozzle is tangent with inboard imaginary circle and the outside imaginary circle of burner hearth respectively; Described mud nozzle is communicated with an airduct road by an elbow, is provided with oxidation airduct road in the described airduct road, and described oxidation airduct road is communicated with outer air current spray nozzle.
The angle of described elbow and mud nozzle-axis is 45～90 °.
Described bluff body is a triangular prism, and the drift angle of described triangular prism is 6～10 °.
The angle β on described mud nozzle and its limit, place is 100～110 °.
Described oxidation airduct road is consistent with the angle of inclination of mud nozzle.
The vertical section in described oxidation airduct road accounts for 1/4～2/3 of outer air current spray nozzle vertical section area.
The angle γ of the place of described mud nozzle while being adjacent is 130～140 °.
Utilize the utility model to realize preventing the paper mill sludge burning process of water-cooling wall slagging scorification and corrosion, concrete steps are as follows:
1) will dewater or dried mud, send into the burner hearth burning via the mud nozzle, airduct road and the elbow of mud nozzle junction produce centrifugal force and make that mud is deep or light and separate, and make most of mud enter the burner hearth burning through interior air current spray nozzle, and oxidation wind enters burner hearth through outer air current spray nozzle and burns;
2) sewage gas stream forms the stable recirculating zone of being made up of whirlpool through the bluff body in the middle of the mud nozzle and in the bluff body back, thereby the retention flame reaches steady combustion purpose;
3) most of mud air-flow is in the burning of the center of burner hearth, excess air coefficient less than 1 condition under, form reducing atmosphere, reduce NO
xDischarging; Remaining a small amount of mud air-flow is in close water-cooling wall zonal combustion, because the adding of oxidation wind, excess air coefficient greater than 1 condition under, form oxidizing atmosphere, the reducing atmosphere of center is separated with water-cooling wall, avoid ash fusion point to reduce, also prevented the reaction of chlorine and tube wall metallic element simultaneously, reach the purpose that prevents water-cooling wall slagging scorification and corrosion.
The air quantity of a described wind is 20%～40% of total blast volume, and the air quantity of oxidation wind is 5%～15% of total blast volume, and both wind speed unanimities.
The beneficial effects of the utility model are that the utility model can realize that a large amount of mud in the burning of burner hearth central area, form reducing atmosphere, reduces NO
xDischarging.Simultaneously a large amount of molten ash accumulate in the central area, can not touch water-cooling wall, avoid slagging scorification and corrosion.A small amount of mud forms oxidizing atmosphere near the water-cooling wall zonal combustion, and reducing atmosphere and the water-cooling wall of center separated, reduced tube wall temperature, avoid ash fusion point to reduce, also prevented the reaction of chlorine and tube wall metallic element simultaneously, reach the purpose that prevents slagging scorification and corrosion.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the sectional side elevation of mud nozzle;
Wherein: 1, airduct road, 2, oxidation airduct road, 3, the mud nozzle, 4, bluff body, 5, water-cooling wall, 6, oxidizing atmosphere, 7, reducing atmosphere, 8, inboard imaginary circle, 9, outside imaginary circle.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further set forth, should be noted that following explanation only is in order to explain the utility model, its content not to be limited.
As shown in Figure 1, the utility model is a kind of paper mill sludge burner that prevents water-cooling wall 5 slagging scorification and corrosion, the burner hearth that is covered with water-cooling wall 5 around it comprises, the cross section of described burner hearth is octagon, in described octagonal eight limits, there is and only has a mud nozzle 3 on every adjacent two edges, the internal communication of described mud nozzle 3 and burner hearth; The centre position of described mud nozzle 3 is provided with bluff body 4, air current spray nozzle and outer air current spray nozzle in described bluff body 4 is divided into mud nozzle 3, the center line of described interior air current spray nozzle and outer air current spray nozzle is tangent with inboard imaginary circle 8 and the outside imaginary circle 9 of burner hearth respectively; Described mud nozzle 3 is communicated with an airduct road by an elbow, is provided with oxidation airduct road 2 in the described airduct road 1, and described oxidation airduct road 2 is communicated with outer air current spray nozzle.
Described elbow and the angle of mud nozzle 3 axis equate with α among Fig. 1, are 45～90 °.
Described bluff body 4 is a triangular prism, and the drift angle of described triangular prism is 6～10 °.
Described mud nozzle 3 is 100～110 ° with the angle β on its limit, place.
Described oxidation airduct road 2 is consistent with the angle of inclination of mud nozzle 3.
The vertical section in described oxidation airduct road 2 accounts for 1/4～2/3 of outer air current spray nozzle vertical section area.
The angle γ of the place of described mud nozzle 3 while being adjacent is 130～140 °.
Utilize the utility model to realize preventing the paper mill sludge burning process of water-cooling wall 5 slagging scorification and corrosion, concrete steps are as follows:
1) will dewater or dried mud, send into the burner hearth burning via mud nozzle 4, airduct road 1 and the elbow of mud nozzle 4 junctions produce centrifugal force and make that mud is deep or light and separate, make most of mud enter the burner hearth burning through interior air current spray nozzle, oxidation wind enters the burner hearth burning through outer air current spray nozzle;
2) sewage gas stream forms the stable recirculating zone of being made up of whirlpool through the bluff body 4 in the middle of the mud nozzle 3 and in bluff body 4 back, thereby the retention flame reaches steady combustion purpose;
3) most of mud air-flow is in the burning of the center of burner hearth, excess air coefficient less than 1 condition under, form reducing atmosphere 7, reduce NO
xDischarging; Remaining a small amount of mud air-flow is in close water-cooling wall 5 zonal combustions, because the adding of oxidation wind, excess air coefficient greater than 1 condition under, form oxidizing atmosphere 6, the reducing atmosphere 7 of center is separated with water-cooling wall 5, avoid ash fusion point to reduce, also prevented the reaction of chlorine and tube wall metallic element simultaneously, reach the purpose that prevents water-cooling wall 5 slagging scorification and corrosion.
The air quantity of a wind is 20%～40% of total blast volume, and the air quantity of oxidation wind is 5%～15% of total blast volume, and both wind speed unanimities.
Though above-mentionedly by reference to the accompanying drawings the specific embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (7)
1. paper mill sludge burner that prevents water-cooling wall slagging scorification and corrosion, the burner hearth that is covered with water-cooling wall around comprising, it is characterized in that, the cross section of described burner hearth is octagon, in described octagonal eight limits, there is and only has a mud nozzle on every adjacent two edges, the internal communication of described mud nozzle and burner hearth; The centre position of described mud nozzle is provided with bluff body, air current spray nozzle and outer air current spray nozzle in described bluff body is divided into the mud nozzle, and the center line of described interior air current spray nozzle and outer air current spray nozzle is tangent with inboard imaginary circle and the outside imaginary circle of burner hearth respectively; Described mud nozzle is communicated with an airduct road by an elbow, is provided with oxidation airduct road in the described airduct road, and described oxidation airduct road is communicated with outer air current spray nozzle.
2. paper mill sludge burner according to claim 1 is characterized in that, the angle of described elbow and mud nozzle-axis is 45～90 °.
3. paper mill sludge burner according to claim 1 is characterized in that, described bluff body is a triangular prism, and the drift angle of described triangular prism is 6～10 °.
4. paper mill sludge burner according to claim 1 is characterized in that, the angle β on described mud nozzle and its limit, place is 100～110 °.
5. paper mill sludge burner according to claim 1 is characterized in that, described oxidation airduct road is consistent with the angle of inclination of mud nozzle.
6. paper mill sludge burner according to claim 1 is characterized in that, the vertical section in described oxidation airduct road accounts for 1/4～2/3 of outer air current spray nozzle vertical section area.
7. paper mill sludge burner according to claim 1 is characterized in that, the angle γ of the place of described mud nozzle while being adjacent is 130～140 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320169471 CN203162964U (en) | 2013-04-07 | 2013-04-07 | Paper sludge combustion apparatus capable of preventing water walls from scorification and corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320169471 CN203162964U (en) | 2013-04-07 | 2013-04-07 | Paper sludge combustion apparatus capable of preventing water walls from scorification and corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203162964U true CN203162964U (en) | 2013-08-28 |
Family
ID=49024145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320169471 Withdrawn - After Issue CN203162964U (en) | 2013-04-07 | 2013-04-07 | Paper sludge combustion apparatus capable of preventing water walls from scorification and corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203162964U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196146A (en) * | 2013-04-07 | 2013-07-10 | 山东大学 | Paper mill sludge combustion device and technique capable of preventing slag-bonding and corrosion of water walls |
-
2013
- 2013-04-07 CN CN 201320169471 patent/CN203162964U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196146A (en) * | 2013-04-07 | 2013-07-10 | 山东大学 | Paper mill sludge combustion device and technique capable of preventing slag-bonding and corrosion of water walls |
| CN103196146B (en) * | 2013-04-07 | 2015-08-12 | 山东大学 | A kind of paper mill sludge burner and technique preventing water-cooling wall slagging scorification and corrosion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130828 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |