CN210511704U - Multilayer fluidized bed burning system - Google Patents
Multilayer fluidized bed burning system Download PDFInfo
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- CN210511704U CN210511704U CN201922464026.2U CN201922464026U CN210511704U CN 210511704 U CN210511704 U CN 210511704U CN 201922464026 U CN201922464026 U CN 201922464026U CN 210511704 U CN210511704 U CN 210511704U
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- incineration chamber
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to a multilayer fluidized bed system of burning. The system comprises a deslagging device (1), a first fluidized incineration chamber (2) and a second fluidized incineration chamber (3) which are sequentially communicated from bottom to top, wherein the second fluidized incineration chamber (3) is communicated to a waste heat recovery device (5) through a third fluidized incineration chamber (4); a first fluidized bed (21) is arranged in the first fluidized incineration chamber (2), a second fluidized incineration bed (31) is arranged in the second fluidized incineration chamber (3), and a third fluidized bed (41) is arranged in the third fluidized incineration chamber (4); an air distribution grid (7) is arranged between the first fluidized incineration chamber (2) and the second fluidized incineration chamber (3). The utility model discloses to different waste materials, can deal with multiple type and burn the problem that the thing burns simultaneously and handle, the organic matter that does not burn to the greatest extent in with the flue gas carries out the reburning, and its burning is abundant, and avoids secondary pollution.
Description
Technical Field
The utility model relates to a danger waste incineration handles and environmental protection technical field, in particular to multilayer fluidized bed burns system.
Background
The dangerous waste incineration is a municipal waste treatment utility model widely adopted in various countries in the world at present, and a large-scale waste incineration treatment system provided with a heat energy recovery and utilization device is gradually increasing to be the mainstream of incineration treatment due to compliance with the requirement of energy recovery. At present, the waste incineration mainly depends on a grate furnace and a circulating fluidized bed boiler, and the main principle of the waste incineration is that heat energy generated by the waste incineration is used for baking water wall pipelines or heaters arranged in a main combustion chamber, a left cyclone separator, a right cyclone separator and a vertical flue. The existing grate furnace and the circulating fluidized bed boiler have the defects that various wastes are mixed together and burnt, the burning is insufficient, secondary pollution is easy to generate, or more combustion improver is needed to increase, so that the burning cost is higher, and the like.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to the aforesaid, provide one kind to different kinds of wastes material, set up different incineration chambers respectively, and the multilayer fluidized bed system of burning that handles respectively to the result of difference separately.
The utility model discloses a realize through following technical scheme:
a multilayer fluidized bed incineration system comprises a deslagging device, a first fluidized incineration chamber and a second fluidized incineration chamber which are sequentially communicated from bottom to top, wherein the second fluidized incineration chamber is communicated to a waste heat recovery device through a third fluidized incineration chamber; a first fluidized bed is arranged in the first fluidized incineration chamber, a second fluidized incineration bed is arranged in the second fluidized incineration chamber, and a third fluidized bed is arranged in the third fluidized incineration chamber;
further, according to the multilayer fluidized bed incineration system, the second fluidized incineration chamber is communicated to the third fluidized incineration chamber through a cyclone separator, and a slag discharge port of the cyclone separator is communicated to the second fluidized incineration chamber.
Further, the multilayer fluidized bed incineration system further comprises a first storage bin communicated to the first fluidized incineration chamber.
Further, the multilayer fluidized bed incineration system further comprises a second storage bin communicated to the second fluidized incineration chamber.
Further, the multilayer fluidized bed incineration system further comprises a desulfurizer bin communicated to the first fluidized incineration chamber.
Furthermore, the multilayer fluidized bed incineration system further comprises a first air preheater and a second air preheater which are arranged on the waste heat recovery device; one end of the first air preheater is connected with a first fan, and the other end of the first air preheater is respectively communicated to the first fluidized incineration chamber and the second fluidized incineration chamber; one end of the second air preheater is connected with a second fan, and the other end of the second air preheater is respectively communicated to the first fluidized bed, the second fluidized bed and the third fluidized bed.
Furthermore, in the multilayer fluidized bed incineration system, the waste heat recovery device is communicated to the flue gas purification device, and the dust exhaust port of the flue gas purification device is communicated to the third fluidized incineration chamber.
Further, in the multilayer fluidized bed incineration system, the first fluidized incineration chamber and the second fluidized incineration chamber are respectively provided with a first combustor and a second combustor.
Further, a multilayer fluidized bed system of burning, set up cooling body in the dross removal mechanism.
The utility model has the advantages and effects that:
1. the utility model provides a multilayer fluidized bed system of burning adopts vertical segmentation arrangement structure, to different waste materials, sets up first, second, third fluidization incineration chamber, can deal with multiple type and burn the problem that the thing burns simultaneously and handle. The unburned organic matters in the flue gas can be combusted again, the combustion is full, and the secondary pollution is avoided.
2. The utility model provides a multilayer fluidized bed burns system convenient operation, operation are stable. The bed material of the fluidized bed is quartz sand, the fed fuel only accounts for a small part of the bed material, the heat storage capacity is large, the rapid cooling and rapid heating phenomena of the fluidized bed are avoided, and the combustion is stable. The drying, ignition, combustion and post-combustion of the fuel are almost simultaneously performed without complicated adjustment, the combustion control is easy, and the automation is easy to realize, and the starting or stopping can be completed in a very short time, and the continuous combustion can be realized.
2. The utility model provides a multilayer fluidized bed burns system durability is good, long service life. The system is not provided with mechanical moving parts, so the service life is long. Because the combustion is even, the local overheating phenomenon can not be generated, and the furnace is of a box-type structure and is adaptive to the thermal expansion of the refractory material, the damage of the refractory material is avoided to a certain degree.
3. The multilayer fluidized bed incineration system provided by the utility model has the advantages that other auxiliary fuels are not needed to be added for general incinerated substances, so that the investment and the operation cost are greatly reduced; the low-calorific-value waste can be directly combusted by adding auxiliary fuel.
4. The utility model provides a multilayer fluidized bed burns system's waste residue is the dry discharge, is favorable to the comprehensive utilization of slag.
Drawings
Fig. 1 shows the structure schematic diagram of the multilayer fluidized bed incineration system provided by the utility model.
Description of reference numerals: 1-a deslagging device, 11-a cooling water inlet, 12-a cooling water outlet, 2-a first fluidized incineration chamber, 21-a first fluidized bed, 22-a first bin, 23-a first combustor, 24-a desulfurizer bin, 3-a second fluidized incineration chamber, 31-a second fluidized incineration bed, 32-a second bin, 33-a second combustor, 4-a third fluidized incineration chamber, 41-a third fluidized bed, 5-a waste heat recovery device, 51-a first air preheater, 52-a second air preheater, 53-a first fan, 54-a second fan, 6-a cyclone separator, 61-a slag discharge port, 7-an air distribution grid, 71-a grid, 8-a flue gas purification device and 81-a dust discharge port.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention clearer, the following drawings in the embodiments of the present invention are combined to perform more detailed description on the technical solution in the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the invention.
Fig. 1 shows the structure schematic diagram of the multilayer fluidized bed incineration system provided by the utility model. The system comprises a deslagging device 1, a first fluidized incineration chamber 2 and a second fluidized incineration chamber 3 which are sequentially communicated from bottom to top, wherein the second fluidized incineration chamber 3 is communicated to a waste heat recovery device 5 through a third fluidized incineration chamber 4. A first fluidized bed 21 is provided in the first fluidized incineration chamber 2, a second fluidized bed 31 is provided in the second fluidized incineration chamber 3, and a third fluidized bed 41 is provided in the third fluidized incineration chamber 4. In particular, a fluidized bed structure is adopted, so that the solid waste is efficiently treated. According to the materials with different specific gravities, the fluidized bed type structures which are suitable for the materials are respectively arranged. For example, the first fluidized incineration chamber 2 carries out fluidized incineration treatment on light organic waste residues, and adopts a dilute phase fluidized bed structure, and the fluidizing medium is high-temperature air. The second fluidized incineration chamber 3 adopts a dense-phase fluidized bed structure aiming at dried sludge and high-viscosity sludge-like residues, and the fluidized medium is high-temperature quartz sand. The third fluidized incineration chamber 4 adopts a micro fluidized bed structure (a fixed bubbling bed structure) for the flue gas generated by the first fluidized incineration chamber 2 and the second fluidized incineration chamber 3, and the fluidized medium is high-temperature air. When the heat value is not enough to support the burning process, the combustion improver is used for afterburning to provide heat. The first fluidized incineration chamber 2 and the second fluidized incineration chamber 3 are provided with a first burner 23 and a second burner 33, respectively.
The system also includes a first bin 22, a second bin 32, and a desulfurizing agent bin 24. The first storage bin 22 and the desulfurizer storage bin 24 are communicated to the first fluidized incineration chamber 2, the first storage bin 22 is used for storing and controlling the input amount of the light organic waste residues, and the desulfurizer storage bin 24 is used for storing and controlling the input amount of the desulfurizer. Lime can carry out deacidification as the desulfurizer, and lime can carry out neutralization reaction with acid gases such as sulfur dioxide that produce in the waste incineration under the high temperature condition, has reduced sulfur dioxide's emission concentration, has avoided the corrosion problem of afterbody equipment, simultaneously also greatly reduced the emission of pollutant, alleviate afterbody flue gas deacidification treatment pressure. The dry deacidification process is additionally arranged in the first incineration chamber, so that acid gas generated by incineration can be effectively neutralized during fluidized incineration, and the scale and investment of a rear-section flue gas purification and desulfurization device are reduced. The second storage bin 32 is communicated to the second fluidized incineration chamber 3, and the second storage bin 32 is used for storing and controlling the adding amount of the dried sludge and the high-viscosity sludge-like residues. The light organic waste residue, the dried sludge and the high-viscosity sludge-like residue are respectively hermetically transferred to the first storage bin 22 and the second storage bin 32. The light organic waste residue (biomass) is sent into the first storage bin 22 through the travelling grab bucket and sent into the first fluidized incineration chamber 2 for incineration through the first-level feeding conveyor and the second-level feeding conveyor. The dried sludge and the high-viscosity sludge-like residues (the decoction dregs and the sludge) are conveyed to the second fluidized incineration chamber 3 for incineration disposal through a feeding conveyor arranged at the bottom of the second storage bin 32.
An air distribution grid 7 can be arranged between the first fluidized incineration chamber 2 and the second fluidized incineration chamber 3. The grille 71 of the air distribution grille 7 is arranged obliquely. High-temperature flue gas generated by incineration in the first fluidized incineration chamber 2 enters the second fluidized incineration chamber 3 through the air distribution grid 7 to support combustion for incineration in the second fluidized incineration chamber 3; meanwhile, the disturbance of the smoke on the second fluidized bed 31 is increased due to the inclined arrangement of the grating 71, the smoke rotates and rises, and large particles left after incineration fall into the first fluidized incineration chamber 2 through a gap between the grating 71 and the inner wall of the hearth to be combusted again, and then waste residues generated by communicating the first fluidized incineration chamber 2 through the deslagging device 1 are discharged together. A cooling mechanism is arranged in the deslagging device 1, and cooling water circulation is carried out through a cooling water inlet 11 and a cooling water outlet 12 to cool the waste slag. No arrangement is needed between the first fluidized incineration chamber 2 and the second fluidized incineration chamber 3, and large particles left after incineration directly fall into the first fluidized incineration chamber 2 through the second fluidized bed 31.
The system further comprises a cyclone separator 6, which cyclone separator 6 is arranged between the second fluidized incineration chamber 3 and the third fluidized incineration chamber 4. Flue gas generated by incineration in the second fluidized incineration chamber 3 is separated and treated by the cyclone separator 6, large particulate matters and quartz sand which are not burnt completely and are mixed with the flue gas are returned to the second fluidized incineration chamber 3 through the slag discharge port 61 to be continuously incinerated for the second time, and the rest of the flue gas enters the third fluidized incineration chamber 4.
The system further includes a first air preheater 51 and a second air preheater 52 provided on the heat recovery device 5. One end of the first air preheater 51 is connected with the first fan 53, and the other end is respectively communicated to the first fluidized incineration chamber 2 and the second fluidized incineration chamber 3. The second air preheater 52 has one end connected to the second blower 54 and the other end connected to the first fluidized bed 21, the second fluidized bed 22 and the third fluidized bed 32, respectively. The air in the first air preheater 51 is heated by the waste heat recovery device 5 and sent into the first fluidized incineration chamber 2 and the second fluidized incineration chamber 3 to participate in incineration combustion supporting. The air in the second air preheater 52 is heated by the waste heat recovery device 5 and is sent to the bottoms of the first fluidized bed 21, the second fluidized bed 22 and the third fluidized bed 32, and then is sprayed upwards to stir the incinerated substance, participate in combustion supporting and enable the incineration to be complete.
The system further comprises a flue gas purification device 8, an outlet of the waste heat recovery device 5 is communicated to an inlet of the flue gas purification device 8, a dust exhaust port of the flue gas purification device 8 is communicated to the third fluidized incineration chamber 4, and dust and particulate matters which are not completely combusted in the flue gas purification device are returned to the third fluidized incineration chamber 4 to be continuously incinerated again.
Combustion improvers may be added to the first fluidized incineration chamber 2, the second fluidized incineration chamber 3 and the third fluidized incineration chamber 4 as necessary.
The incinerator can recover energy in the waste to the maximum extent on the premise of ensuring harmless and reduced waste disposal, realize energy resource of waste disposal and achieve the aim of treating waste by waste. The combustion in the furnace is fully ensured: the residence time is > 3s and the temperature is > 1100 ℃. According to different materials, different turbulence intensities are realized by controlling the primary air quantity and the feeding quantity, and the incineration effect of different materials is met. Turbulence intensity of the first fluidized bed: 11% -13%, the turbulence intensity of the second fluidized bed: 9 to 10 percent, and the turbulence intensity of the third fluidized bed is controlled to be 0.8 to 1.2 percent.
The above embodiments are only used to illustrate the technical solutions of the present invention, and are not used to limit the scope of the present invention. However, all equivalent changes and modifications made within the scope of the present invention should be considered as falling within the scope of the present invention.
Claims (9)
1. The multilayer fluidized bed incineration system is characterized by comprising a deslagging device (1), a first fluidized incineration chamber (2) and a second fluidized incineration chamber (3) which are sequentially communicated from bottom to top, wherein the second fluidized incineration chamber (3) is communicated to a waste heat recovery device (5) through a third fluidized incineration chamber (4); a first fluidized bed (21) is arranged in the first fluidized incineration chamber (2), a second fluidized incineration bed (31) is arranged in the second fluidized incineration chamber (3), and a third fluidized bed (41) is arranged in the third fluidized incineration chamber (4).
2. A multilayer fluidized bed incineration system according to claim 1, characterised in that the second fluidized incineration chamber (3) is connected to the third fluidized incineration chamber (4) via a cyclone (6), the slag discharge (61) of the cyclone (6) being connected to the second fluidized incineration chamber (3).
3. A multilayer fluidized bed incineration system according to claim 1, characterised in that the system further comprises a first silo (22), said first silo (22) being connected to the first fluidized incineration chamber (2).
4. A multilayer fluidized bed incineration system according to claim 1, characterized in that the system further comprises a second silo (32), said second silo (32) being connected to the second fluidized incineration chamber (3).
5. A multilayer fluidized bed incineration system according to claim 1, characterised in that the system further comprises a desulphurizing agent bin (24), said desulphurizing agent bin (24) being connected to the first fluidized incineration chamber (2).
6. A multilayer fluidized bed incineration system according to claim 1, characterised in that the system further comprises a first air preheater (51) and a second air preheater (52) arranged on the waste heat recovery device (5); one end of the first air preheater (51) is connected with a first fan (53), and the other end of the first air preheater is respectively communicated to the first fluidized incineration chamber (2) and the second fluidized incineration chamber (3); one end of the second air preheater (52) is connected with a second fan (54), and the other end is respectively communicated to the first fluidized bed (21), the second fluidized incineration bed (31) and the third fluidized bed (41).
7. A multilayer fluidized bed incineration system according to claim 1, characterised in that the waste heat recovery device (5) is connected to a flue gas cleaning device (8), the dust discharge (81) of the flue gas cleaning device (8) being connected to the third fluidized incineration chamber (4).
8. A multilayer fluidized bed incineration system according to claim 1, characterised in that the first fluidized incineration chamber (2) and the second fluidized incineration chamber (3) are provided with a first burner (23) and a second burner (33), respectively.
9. A multilayer fluidized bed incineration system according to claim 1, characterised in that a cooling mechanism is arranged in the de-slagging device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922464026.2U CN210511704U (en) | 2019-12-31 | 2019-12-31 | Multilayer fluidized bed burning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922464026.2U CN210511704U (en) | 2019-12-31 | 2019-12-31 | Multilayer fluidized bed burning system |
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| Publication Number | Publication Date |
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| CN210511704U true CN210511704U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922464026.2U Active CN210511704U (en) | 2019-12-31 | 2019-12-31 | Multilayer fluidized bed burning system |
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Effective date of registration: 20210120 Address after: 100081 2803-1, 24 / F, building 1, courtyard B 12, Zhongguancun South Street, Haidian District, Beijing Patentee after: ECOTEC ECO-TEC ASIA (BEIJING) Co.,Ltd. Patentee after: JIANGSU AEROSPACE HEWLETT ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 100022 1301, yuanjialong building, No.1, South East Third Ring Road, Chaoyang District, Beijing Patentee before: ECOTEC ECO-TEC ASIA (BEIJING) Co.,Ltd. |
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