CN203794643U - Novel hot air flow guide device of urea pyrolyzing furnace - Google Patents
Novel hot air flow guide device of urea pyrolyzing furnace Download PDFInfo
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- CN203794643U CN203794643U CN201420215365.1U CN201420215365U CN203794643U CN 203794643 U CN203794643 U CN 203794643U CN 201420215365 U CN201420215365 U CN 201420215365U CN 203794643 U CN203794643 U CN 203794643U
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- hot blast
- outer tube
- urea
- center column
- flow guide
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000004202 carbamide Substances 0.000 title claims abstract description 81
- 238000000197 pyrolysis Methods 0.000 claims description 53
- 239000000411 inducer Substances 0.000 claims description 44
- 238000005034 decoration Methods 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 235000010333 potassium nitrate Nutrition 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a novel hot air flow guide device of a urea pyrolyzing furnace. The device comprises flow guide pieces, a central column body and an outer casing pipe, the central column body is arranged in the outer casing pipe, and the flow guide pieces are evenly distributed between the central column body and the outer casing pipe in a spirally-arranged mode and form independent flow guide channels. According to the novel hot air flow guide device of the urea pyrolyzing furnace, the structure of the novel hot air flow guide device is optimally designed, the hot air flow guide performance of the hot air flow guide device is improved, the urea decomposition rate of the urea pyrolyzing furnace with the hot air flow guide device of the structure is effectively improved, and sufficient raw materials are provided for the saltpeter removing process. In addition, according to the hot air flow guide device of the structure, the length of the urea pyrolyzing furnace can be properly shortened, the manufacturing cost can be reduced, the occupied space can be reduced, the number of crystals on the inner wall of the urea pyrolyzing furnace is reduced to a certain degree, and the utilization rate of the hot air is improved.
Description
Technical field
The utility model relates to a kind of hot blast guiding device, especially a kind of hot blast guiding device of novel urea pyrolysis stove.
Background technology
In the tail gas of coal-burning power plant, there is air-polluting oxynitride and oxysulfide.At present, the major way of processing oxynitride is that the material by generating with Urea wind solution reacts generation nitrogen, water and carbonic acid gas with nitrogen oxide, and the material of generation can not pollute atmosphere.Although can remove in theory nitrogen oxide, in actual working process, due to condition and all restrictions to some extent of equipment of reaction, cause the content overproof of the nitrogen oxide in the tail gas of discharge, do not reach the emission standard of national regulation.
Urea pyrolysis stove is a kind of by ureaclastic device, wherein high-temperature hot-air enters from an opening, again urea soln is sprayed in urea pyrolysis stove, under the effect of high-temperature hot-air, urea decomposition obtains the composition of denitration, but urea decomposition needs a process, if the design of urea pyrolysis stove is unreasonable, can make the decomposition of urea abundant not, have a strong impact on follow-up denitration effect, and cause the discharge of tail gas not up to standard.Find through research, the principal element that affects the rate of decomposition of urea is that the flow velocity of hot blast is too fast, to such an extent as to urea also do not decompose just and discharged by the outlet from ureaclastic device, and the utilization ratio of hot blast is lower.Therefore, can the time of proper extension hot blast in urea pyrolysis stove become the object that investigator studies.In addition, in order to realize the rate of decomposition of urea pyrolysis stove, the body of heater of urea pyrolysis stove is longer, causes difficulty is installed, and takes up room larger, and its manufacturing cost is higher; In the lower situation of urea pyrolysis stove outside temperature that body of heater is grown, can cause exit crystallization, long-time use can be by outlet obstruction, affects the normal use of equipment and has increased the maintenance cost of equipment.The hot blast guiding device of researching and developing in sum a kind of urea pyrolysis stove that can improve urea decomposition ability is necessary very much.
Given this utility model is proposed.
Utility model content
The purpose of this utility model, for overcoming the deficiencies in the prior art, provides one can improve urea decomposition efficiency, reduces urea pyrolysis stove manufacturing cost and use cost, improves hot blast utilization ratio, reduces the hot blast guiding device of the novel urea pyrolysis stove of crystallization content.
In order to realize this object, the utility model adopts following technical scheme: a kind of hot blast guiding device of novel urea pyrolysis stove, comprise inducer, center column and outer tube, center column is located in outer tube, and the decoration form that inducer is spiral is distributed between center column and outer tube and forms separate flow-guiding channel.This hot blast guiding device is arranged on the ingress of urea pyrolysis stove, high-temperature hot-air blasts from ingress, under the guide functions of hot blast guiding device, hot blast carries out water conservancy diversion along flow-guiding channel, hot blast forms eddy-currents in the body of heater of urea pyrolysis stove, the time that hot blast is stopped in urea pyrolysis stove is longer, and the urea spraying in the body of heater of urea pyrolysis stove fully decomposes under hot wind action, required compound while obtaining the denitration of q.s.In addition, by the hot blast guiding device after optimization design in the case of the rate of decomposition of urea that improves urea pyrolysis stove, can also suitably shorten the body of heater length of urea pyrolysis stove, manufacture and the maintenance cost of equipment are reduced, in addition, can also reduce urea pyrolysis outlet of still place crystallization content, the problem that prevention outlet is blocked.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, described center column is identical with the length of outer tube and be 1/4～4 times of inducer pitch.Choose the quantity of the suitable pitch within the scope of this according to the flow velocity that blasts hot blast, when flow velocity is larger, the quantity of the pitch of choosing is more; Flow velocity hour, the comparatively small amt of the pitch of choosing.To ensure that the urea soln that sprays into decomposes fully, and material after ensureing to decompose discharges in urea pyrolysis stove in time, the enough urea decomposition products that need while improving denitration, and improve the utilization ratio of hot blast.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, described center column and outer tube are cylindrical, and being located at the screw diameter of the inducer between center column and outer tube and the ratio of pitch is 0.5～2.Under the certain condition of the diameter of center column, screw diameter is larger, the hot blast rate that unit time blasts urea pyrolysis stove is larger, need the water conservancy diversion time of hot blast guiding device longer, length one timing of center column and outer tube, pitch setting is less, to ensure the reasonable residence time of hot blast in body of heater, improves the utilization ratio of hot blast.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, described outer tube is truncated cone, and the screw diameter of being located at the inducer between center column and outer tube increases gradually along hot blast flow direction.Make hot blast under the effect of hot blast guiding device, make to form larger eddy-currents in body of heater, improved hot blast and sprayed into the urea contact area in body of heater, improve the decomposition efficiency of urea.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, the cone angle of the outer tube of described truncated cone is 10 °～90 °.According to overall structure design, calculate and choose more suitable cone angle.The ingress of urea pyrolysis stove is tapered setting often, for hot blast after hot blast guiding device water conservancy diversion and the conical inboard wall of urea pyrolysis stove are seamlessly transitted, can choose the angle identical or close with the cone angle of conical inboard wall.Reduce the resistance of circinate hot blast in urea pyrolysis stove forming.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, described center column and outer tube are truncated cone, and the screw diameter of being located at the inducer between center column and outer tube increases gradually along hot blast flow direction.Hot blast is entered in body of heater and form pressure reduction, reduce hot blast and enter the resistance in body of heater, reduced the negative pressure of heating plant.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, the cone angle of described center column is 10 °～70 °; The cone angle of described outer tube is 10 °～90 °.Wherein the cone angle of center column can be less than the cone angle of outer tube, and the flow-guiding channel of hot blast guiding device is broadened gradually along the mobile direction of hot blast, also can enter the resistance in body of heater by hot blast.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, described inducer is 3～8.Choose the number of suitable inducer according to practical situation, hot blast is divided into multiply and forms certain regular whirling current, under the effect of pressure reduction, urea soln flows and decomposes along the binding face place of multiply hot air flow, improve to a certain extent the contact area of hot blast and urea soln, improved the rate of decomposition of urea.
In the hot blast guiding device of aforesaid this novel urea pyrolysis stove, described screw diameter is 300mm～800mm; The diameter of described center column is 50mm～200mm.Can be according to how many definite screw diameters of required urea decomposition product and the hot blast rate blasting and the diameter of center column, required urea decomposition product is more, and urea pyrolysis stove is larger, and screw diameter is just larger; The diameter of center column also increases thereupon, to meet the stability of whole and part of the inducer that is fixed on center column.
Adopt after technical scheme described in the utility model, bring following beneficial effect:
The hot blast guiding device of novel urea pyrolysis stove described in the utility model, structure by hot blast guiding device is optimized design, improve the hot blast guide performance of hot blast guiding device, effectively improve the rate of decomposition of the urea of the urea pyrolysis stove of the hot blast guiding device that uses this structure, for furnishing ample material except nitre process; The hot blast guiding device that adopts in addition taper to arrange, can suitably shorten the length of urea pyrolysis stove and reduce its manufacturing cost and reduce it taking up room, and reduce to a certain extent the crystallization content on urea pyrolysis stove inwall, and the utilization ratio of hot blast is higher.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Brief description of the drawings
Fig. 1: a kind of structural representation of the present utility model;
Fig. 2: the utility model is located at the structural representation of the inducer on center column;
Fig. 3: the utility model is located at the structural representation of the single inducer on center column;
Fig. 4: scheme of installation of the present utility model;
Fig. 5: another kind of structural representation of the present utility model.
Wherein: 1, inducer, 2, center column, 3, outer tube, 4, flow-guiding channel, 5, urea pyrolysis stove furnace wall, 6, connection rib.
Embodiment
Specific embodiment of the utility model 1: the hot blast guiding device of a kind of novel urea pyrolysis stove as shown in Figure 1, comprise inducer 1, center column 2 and outer tube 3, center column 2 is located in outer tube 3, and the decoration form that inducer 1 is spiral is distributed between center column 2 and outer tube 3 and forms separate flow-guiding channel 4.Described center column 2 is identical with the length of outer tube 3 and be 0.5 times of inducer 1 pitch.The pitch of described inducer 1 is 310mm.Center column 2 described in it and outer tube 3 are cylindrical, and the screw diameter of inducer 1 and the ratio of pitch be located between center column 2 and outer tube 3 are 0.5.Described screw diameter is 375mm; The diameter of described center column 2 is 90mm.Described inducer 1 is 6.As shown in Figure 4, the outer side wall of the outer tube 3 of described hot blast guiding device is provided with connection rib 6, and is fixed on urea pyrolysis stove furnace wall 5 by connection rib 6.
Specific embodiment of the utility model 2: a kind of hot blast guiding device of novel urea pyrolysis stove, comprise inducer 1, center column 2 and outer tube 3, center column 2 is located in outer tube 3, and the decoration form that inducer 1 is spiral is distributed between center column 2 and outer tube 3 and forms separate flow-guiding channel 4.Described center column 2 is identical with the length of outer tube 3 and be 1 times of inducer 1 pitch.Described outer tube 3 is truncated cone, and the screw diameter of being located at the inducer 1 between center column 2 and outer tube 3 increases gradually along hot blast flow direction.The cone angle of the outer tube 3 of described truncated cone is 60 °.Described inducer 1 is 5.Described screw diameter is 400mm; The diameter of described center column 2 is 80mm.
Specific embodiment of the utility model 3: a kind of hot blast guiding device of novel urea pyrolysis stove, comprise inducer 1, center column 2 and outer tube 3, center column 2 is located in outer tube 3, and the decoration form that inducer 1 is spiral is distributed between center column 2 and outer tube 3 and forms separate flow-guiding channel 4.Described center column 2 is identical with the length of outer tube 3 and be 0.25 times of inducer 1 pitch.Described center column 2 and outer tube 3 are truncated cone, and the screw diameter of being located at the inducer 1 between center column 2 and outer tube 3 increases gradually along hot blast flow direction.The cone angle of described center column 2 is 60 °; The cone angle of described outer tube 3 is 60 °.Described inducer 1 is 3.Described screw diameter is 300mm and increases gradually along inducer 1 sense of rotation; The diameter of described center column 2 is 50mm and increases gradually along the axial direction due of inducer 1.
Specific embodiment of the utility model 4: a kind of hot blast guiding device of novel urea pyrolysis stove, comprise inducer 1, center column 2 and outer tube 3, center column 2 is located in outer tube 3, and the decoration form that inducer 1 is spiral is distributed between center column 2 and outer tube 3 and forms separate flow-guiding channel 4.Described center column 2 is identical with the length of outer tube 3 and be 1.5 times of inducer 1 pitch.As shown in Figure 5, described center column 2 and outer tube 3 are truncated cone, and the screw diameter of being located at the inducer 1 between center column 2 and outer tube 3 increases gradually along hot blast flow direction.The cone angle of described center column 2 is 10 °; The cone angle of described outer tube 3 is 60 °.Described inducer 1 is 8.Described screw diameter is 300mm and increases gradually along inducer 1 sense of rotation; The diameter of described center column 2 is 90mm and increases gradually along the axial direction due of inducer 1.
The foregoing is only preferred implementation of the present utility model; it should be pointed out that for the ordinary skill in the art, do not departing under the utility model principle prerequisite; can also make various deformation and improvement, this also should be considered as protection domain of the present utility model.
Claims (9)
1. the hot blast guiding device of a novel urea pyrolysis stove, it is characterized in that: comprise inducer (1), center column (2) and outer tube (3), center column (2) is located in outer tube (3), and the decoration form that inducer (1) is spiral is distributed between center column (2) and outer tube (3) and forms separate flow-guiding channel (4).
2. the hot blast guiding device of novel urea pyrolysis stove according to claim 1, is characterized in that: described center column (2) is identical with the length of outer tube (3) and be 1/4～4 times of inducer (1) pitch.
3. the hot blast guiding device of novel urea pyrolysis stove according to claim 1, it is characterized in that: described center column (2) and outer tube (3) are cylindrical, the screw diameter of inducer (1) and the ratio of pitch be located between center column (2) and outer tube (3) are 0.5～2.
4. the hot blast guiding device of novel urea pyrolysis stove according to claim 1, it is characterized in that: described outer tube (3) is truncated cone, and the screw diameter of being located at the inducer (1) between center column (2) and outer tube (3) increases gradually along hot blast flow direction.
5. the hot blast guiding device of novel urea pyrolysis stove according to claim 4, is characterized in that: the cone angle of the outer tube (3) of described truncated cone is 10 °～90 °.
6. the hot blast guiding device of novel urea pyrolysis stove according to claim 1, it is characterized in that: described center column (2) and outer tube (3) are truncated cone, and the screw diameter of being located at the inducer (1) between center column (2) and outer tube (3) increases gradually along hot blast flow direction.
7. the hot blast guiding device of novel urea pyrolysis stove according to claim 6, is characterized in that: the cone angle of described center column (2) is 10 °～70 °; The cone angle of described outer tube (3) is 10 °～90 °.
8. the hot blast guiding device of novel urea pyrolysis stove according to claim 1, is characterized in that: described inducer (1) is 3～8.
9. the hot blast guiding device of novel urea pyrolysis stove according to claim 1, is characterized in that: described screw diameter is 300mm～800mm; The diameter of described center column (2) is 50mm～200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215365.1U CN203794643U (en) | 2014-04-29 | 2014-04-29 | Novel hot air flow guide device of urea pyrolyzing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215365.1U CN203794643U (en) | 2014-04-29 | 2014-04-29 | Novel hot air flow guide device of urea pyrolyzing furnace |
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| Publication Number | Publication Date |
|---|---|
| CN203794643U true CN203794643U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420215365.1U Expired - Fee Related CN203794643U (en) | 2014-04-29 | 2014-04-29 | Novel hot air flow guide device of urea pyrolyzing furnace |
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| Country | Link |
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| CN (1) | CN203794643U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065954A (en) * | 2019-05-22 | 2019-07-30 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN112111286A (en) * | 2020-09-03 | 2020-12-22 | 山东省环境保护科学研究设计院有限公司 | Pyrolysis gas discharge system of pyrolysis furnace |
-
2014
- 2014-04-29 CN CN201420215365.1U patent/CN203794643U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065954A (en) * | 2019-05-22 | 2019-07-30 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN110065954B (en) * | 2019-05-22 | 2023-12-01 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN112111286A (en) * | 2020-09-03 | 2020-12-22 | 山东省环境保护科学研究设计院有限公司 | Pyrolysis gas discharge system of pyrolysis furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100097 Beijing City, Haidian District Zizhuyuan 120 Patentee after: DATANG ENVIRONMENT INDUSTRY GROUP Co.,Ltd. Address before: 100097 Beijing City, Haidian District Zizhuyuan 120 Patentee before: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 |