CN214892660U - White device system that disappears of utilizing sintering flue gas heat - Google Patents
White device system that disappears of utilizing sintering flue gas heat Download PDFInfo
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- CN214892660U CN214892660U CN202121270570.4U CN202121270570U CN214892660U CN 214892660 U CN214892660 U CN 214892660U CN 202121270570 U CN202121270570 U CN 202121270570U CN 214892660 U CN214892660 U CN 214892660U
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Abstract
The utility model provides a white device system that disappears by utilizing the heat of sintering flue gas, which comprises a sintering unit, a chimney, a heat exchange device, a dust removal device, a waste heat boiler and a condensing device; the chimney comprises a chimney body, and annular heat exchange jackets are arranged at intervals in the lining of the chimney body along the axial direction of the chimney body; the flue gas generated by the sintering unit flows into the dust removal device after sequentially flowing through the annular heat exchange jacket and the heat exchange device; the dust removal device, the waste heat boiler, the condensing device, the heat exchange device and the chimney are sequentially connected. The utility model improves the energy utilization rate of the flue gas heat by arranging the replacement heat jacket in the chimney and utilizing the heat of the sintering flue gas as a heat source; and the flue gas temperature in the chimney is higher, can effectively avoid the formation of acid mist, can effectively avoid the corruption of chimney.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, a white device system that disappears is related to, especially relate to an utilize thermal white device system that disappears of sintering flue gas.
Background
With the wide application of wet desulphurization of boiler flue gas, the water content of the flue gas after desulphurization is greatly increased compared with that before desulphurization, and the temperature of the flue gas is lower than the dew point temperature, so that the flue gas is directly discharged into an original chimney without being treated, serious corrosion is inevitably caused to the flue gas, and huge potential safety hazards are formed.
In order to solve the problem of chimney corrosion prevention, two common methods at present comprise a flue gas heat exchanger and a chimney corrosion prevention technology. The flue gas heat exchanger has the problems of large blockage and flow resistance and high energy consumption; the chimney anticorrosion technology is limited by the material level, and the chimney is difficult to completely realize no corrosion.
CN 102049187A discloses a FGD desulfurization flue gas discharging equipment and chimney of no GGH, desulfurization flue gas discharging equipment and chimney include leading tobacco pipe, collection cigarette casing, annular platform. At least one smoke guide pipe is communicated with the upper section of the smoke collection shell, and the smoke guide pipe is any one of a circular smoke guide pipe, a conical smoke guide pipe, a prismatic smoke guide pipe and a special-shaped smoke guide pipe. The smoke collection shell is any one of a hollow truncated cone shell and a hollow truncated pyramid shell, the annular platform is sleeved and fixed at the middle upper part of the smoke guide pipe, at least one flow guide hole is formed in the annular platform, and the radius of the annular platform is equal to the radius of an inscribed circle at the lower end part of the smoke collection shell. The flue gas discharge device is arranged at a certain height from bottom to top along the elevation of the chimney, so that condensate on the inner wall of each section of the chimney can flow into the ground condensation pool through the flow guide holes of the flue gas discharge device, the flow guide branch pipes and the flow guide main pipe, the structure in the chimney is complex, the cost is high, and the cost for equipment operation and maintenance is high.
CN 205402766U discloses a wet flue gas cyclone-assisted heat storage anticorrosion structure chimney, which comprises a chimney outer cylinder and a brick lining, wherein an air heat-insulating interlayer is arranged between the chimney outer cylinder and the brick lining; the outer chimney barrel is provided with a bracket supporting structure at intervals, and brick linings are supported in sections; the internal surface of brick lining is equipped with helps and revolves the structure, help to revolve the structure and be the linear type help and revolve the structure, inside is equipped with heat transmission pipe, heat transmission pipe strides the bracket bearing structure and arranges, the both ends and the intermediate position of heat transmission pipe pass brick lining and air heat preservation intermediate layer intercommunication by the branch pipe. The forced convection heat exchange between the hot flue gas in the chimney and the flue gas in the chimney is utilized to increase the temperature of the chimney, so that the water vapor in the chimney is not condensed. But the structure of chimney is complicated, and the construction degree of difficulty is higher, because bracket bearing structure length is great moreover, has improved the construction cost of chimney.
CN 104154549A discloses an anticorrosion integrated device and method for a boiler wet desulphurization and defogging flue gas reheating chimney, which comprises a boiler, a dust remover, a suction fan, a desulphurization tower, a defogging and dehumidifying device and a chimney, wherein the device also comprises a split heat pipe exchanger which is divided into an upper heat exchanger and a lower heat exchange pipe; the boiler is connected with the dust remover, the dust remover is connected with the suction fan, the suction fan is connected with the lower heat exchange tube, the lower heat exchange tube is connected with the desulfurizing tower, the desulfurizing tower is connected with the desulfurizing and dehumidifying device, the defogging and dehumidifying device is connected with the chimney, and the upper heat exchange tube is connected with a pipeline connected with the defogging and dehumidifying device in front of the chimney through the pipeline. The integrated device can not fully utilize the heat of the flue gas, and needs to introduce external airflow for heat exchange, so that the cost is high.
Therefore, it is necessary to provide a white smoke abatement device system with high energy utilization rate and good white smoke abatement effect, which can effectively reduce the corrosion of the desulfurized flue gas to the chimney and prolong the service life of the chimney.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an utilize the thermal white device system that disappears of sintering flue gas, utilize the thermal white device system that disappears of sintering flue gas simple structure of system, the heat that can effectively utilize the sintering flue gas to produce to can effectively avoid the corruption of chimney.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an utilize thermal white device system that disappears of sintering flue gas, the white device system that disappears includes sintering unit, chimney, heat transfer device, dust collector, exhaust-heat boiler, SOx/NOx control device and condensing equipment.
The chimney comprises a chimney body, and annular heat exchange jackets are arranged at intervals in the lining of the chimney body along the axial direction of the chimney body.
And the flue gas generated by the sintering unit flows into the dust removal device after sequentially flowing through the annular heat exchange jacket and the heat exchange device.
The dust removal device, the waste heat boiler, the desulfurization and denitrification device, the condensing device and the heat exchange device are sequentially connected with the chimney.
Utilize the utility model provides a during white device system disappears, the sintering flue gas has higher heat, and its annular heat transfer that lets in the chimney presss from both sides the cover, makes the chimney inner wall heat up, carries out the heat transfer with the gas in the chimney simultaneously to effectively avoided the formation of acid mist in the chimney, improved the life of chimney. The gas flowing out of the annular heat exchange jacket of the chimney still has higher temperature, and exchanges heat with the gas flowing out of the condensing device, so that the gas flowing into the chimney is preheated, and meanwhile, the temperature of the gas entering the dust removal device is lower, the damage of the high-temperature gas to the structure of the dust removal device is effectively avoided, and the whitening effect can be further improved.
The SOx/NOx control device is the conventional wet flue gas desulfurization denitrification facility in this field, the utility model discloses do not specifically limit here.
Preferably, an annular heat exchange jacket in the chimney body protrudes from the lining.
In order to improve the heat exchange effect between the annular heat exchange jacket and the flue gas, the annular heat exchange jacket protrudes out of the lining. When the distance of the annular heat exchange jacket protruding out of the lining is too short, effective heat exchange between the flue gas and the annular heat exchange jacket cannot be realized; when the distance of the annular heat exchange jacket protruding out of the lining is too long, the resistance of the flue gas flowing can be increased, and the corrosion of the flue gas to the annular heat exchange jacket is aggravated.
Preferably, the distance of the annular heat exchange jacket protruding from the inner liner is 2-5% of the inner diameter of the chimney body, such as 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5%, but not limited to the values listed, and other values not listed in the range of values are also applicable.
Annular heat transfer presss from both sides cover position, does annular heat transfer presss from both sides the central point that overlaps puts.
Preferably, the bottom surface of the annular heat exchange jacket is at an angle of 5-10 ° to the bottom surface of the chimney, for example, 5 °, 6 °, 7 °, 8 °, 9 ° or 10 °, but not limited to the values listed, and other values not listed in the range of values are equally applicable.
Preferably, the distance between adjacent annular heat exchange jackets is 10-20% of the chimney body height, for example 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20%, but not limited to the recited values, and other values not recited in the range of values are equally applicable.
Preferably, the number of annular heat exchange jackets is 3-6, and may be, for example, 3, 4, 5 or 6.
Preferably, the flue gas outlet of the sintering unit is connected in parallel or in series with an annular heat exchange jacket.
Preferably, when the sintering units are connected in series, the flue gas discharged by the sintering units is introduced from the annular heat exchange jacket at the topmost part and flows out from the annular heat exchange jacket at the bottommost part.
The utility model discloses when sintering exhanst gas outlet and annular heat transfer clamp cover carry out series connection, make the sintering flue gas flow to the bottom gradually by the top, make sintering flue gas and flue gas realize the cross-flow heat transfer, improved flue gas temperature distribution's homogeneity.
Preferably, the annular heat exchange jackets are communicated by a circular grid.
The utility model discloses do not do specifically to the aperture area of grid net and prescribe a limit to, as long as can make the flue gas can normally flow can. The circular grid is communicated with the annular heat exchange jacket on the same layer, so that the uniformity of the temperature distribution of a heat source in the annular heat exchange jacket can be improved, the heat exchange area can be increased, and the heat exchange effect of flue gas can be improved.
Preferably, the dust removing device comprises a cyclone dust collector or a bag-type dust collector.
Preferably, the heat exchange device comprises a tube type heat exchanger or a dividing wall type heat exchanger.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model improves the energy utilization rate of the flue gas heat by arranging the replacement heat jacket in the chimney and utilizing the heat of the sintering flue gas as a heat source; the flue gas temperature in the chimney is high, so that the formation of acid mist can be effectively avoided, and the corrosion of the chimney can be effectively avoided;
(2) when the white smoke eliminating device system provided by the utility model is utilized, the sintering smoke has higher heat, and the sintering smoke is introduced into the annular heat exchange jacket in the chimney to heat up the inner wall of the chimney and exchange heat with the gas in the chimney, thereby effectively avoiding the formation of acid mist in the chimney and prolonging the service life of the chimney;
(3) the gas flowing out of the annular heat exchange jacket of the chimney still has higher temperature, and exchanges heat with the gas flowing out of the condensing device, so that the gas flowing into the chimney is preheated, and meanwhile, the temperature of the gas entering the dust removal device is lower, the damage of the high-temperature gas to the structure of the dust removal device is effectively avoided, and the whitening effect can be further improved.
Drawings
FIG. 1 is a schematic structural diagram of a whitening apparatus system utilizing heat of sintering flue gas provided in example 1, wherein the direction of an arrow is a flue gas flowing direction;
FIG. 2 is a schematic structural diagram of a whitening apparatus system utilizing heat of sintering flue gas provided in example 3, wherein the direction of an arrow is a flue gas flowing direction;
wherein: 1, a sintering unit; 2, a chimney; 3, a heat exchange device; 4, a dust removal device; 5, a waste heat boiler; 6, a desulfurization and denitrification device; and 7, a condensing device.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be 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 by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example 1
The embodiment provides a white device system utilizing heat of sintering flue gas as shown in fig. 1, and the white device system comprises a sintering unit 1, a chimney 2, a heat exchange device 3, a dust removal device 4, a waste heat boiler 5, a desulfurization and denitrification device 6 and a condensing device 7.
The chimney 2 comprises a chimney body, and annular heat exchange jackets are arranged at intervals in the lining of the chimney body along the axial direction of the chimney body.
The flue gas generated by the sintering unit 1 flows into the dust removal device 4 after sequentially flowing through the annular heat exchange jacket and the heat exchange device 3.
The dust removal device 4, the waste heat boiler 5, the desulfurization and denitrification device 6, the condensing device 7 and the heat exchange device 3 are sequentially connected with the chimney 2.
The distance between every two adjacent annular heat exchange jackets is 15% of the height of the chimney body, and the number of the annular heat exchange jackets is 4.
And a flue gas outlet of the sintering unit 1 is connected with the annular heat exchange jacket in parallel.
The dust removal device 4 is a cyclone dust remover; the heat exchange device 3 is a tube-in-tube heat exchanger.
When the white device system that disappears that this embodiment provided is utilized, the sintering flue gas has higher heat, and it lets in the annular heat transfer jacket in chimney 2, makes 2 inner walls of chimney heat up, carries out the heat transfer with the gas in the chimney 2 simultaneously to effectively avoid the formation of chimney 2 interior acid mist, improved the life of chimney 2. The gas flowing out of the annular heat exchange jacket of the chimney 2 still has higher temperature, and exchanges heat with the gas flowing out of the condensing device 7, so that the gas flowing into the chimney 2 is preheated, and meanwhile, the gas entering the dust removal device 4 has lower temperature, thereby effectively avoiding the damage of high-temperature gas to the structure of the dust removal device 4, and further improving the effect of white elimination.
Example 2
The embodiment provides an utilize thermal white device system that disappears of sintering flue gas, white device system that disappears includes sintering unit 1, chimney 2, heat transfer device 3, dust collector 4, exhaust-heat boiler 5, SOx/NOx control device 6 and condensing equipment 7.
The chimney 2 comprises a chimney body, and annular heat exchange jackets are arranged at intervals in the lining of the chimney body along the axial direction of the chimney body.
The flue gas generated by the sintering unit 1 flows into the dust removal device 4 after sequentially flowing through the annular heat exchange jacket and the heat exchange device 3.
The dust removal device 4, the waste heat boiler 5, the desulfurization and denitrification device 6, the condensing device 7 and the heat exchange device 3 are sequentially connected with the chimney 2.
The distance between every two adjacent annular heat exchange jackets is 10% of the height of the chimney body, and the number of the annular heat exchange jackets is 6.
And a flue gas outlet of the sintering unit 1 is connected with the annular heat exchange jacket in parallel.
The dust removal device 4 is a bag-type dust remover; the heat exchange device 3 is a dividing wall type heat exchanger.
When the white device system that disappears that this embodiment provided is utilized, the sintering flue gas has higher heat, and it lets in the annular heat transfer jacket in chimney 2, makes 2 inner walls of chimney heat up, carries out the heat transfer with the gas in the chimney 2 simultaneously to effectively avoid the formation of chimney 2 interior acid mist, improved the life of chimney 2. The gas flowing out of the annular heat exchange jacket of the chimney 2 still has higher temperature, and exchanges heat with the gas flowing out of the condensing device 7, so that the gas flowing into the chimney 2 is preheated, and meanwhile, the gas entering the dust removal device 4 has lower temperature, thereby effectively avoiding the damage of high-temperature gas to the structure of the dust removal device 4, and further improving the effect of white elimination.
Example 3
The embodiment provides a white device system utilizing heat of sintering flue gas as shown in fig. 2, and the white device system comprises a sintering unit 1, a chimney 2, a heat exchange device 3, a dust removal device 4, a waste heat boiler 5, a desulfurization and denitrification device 6 and a condensing device 7.
The chimney 2 comprises a chimney body, and annular heat exchange jackets are arranged at intervals in the lining of the chimney body along the axial direction of the chimney body.
The flue gas generated by the sintering unit 1 flows into the dust removal device 4 after sequentially flowing through the annular heat exchange jacket and the heat exchange device 3.
The dust removal device 4, the waste heat boiler 5, the desulfurization and denitrification device 6, the condensing device 7 and the heat exchange device 3 are sequentially connected with the chimney 2.
The distance between every two adjacent annular heat exchange jackets is 20% of the height of the chimney body, and the number of the annular heat exchange jackets is 3.
The flue gas outlet of the sintering unit 1 is connected with an annular heat exchange jacket in series; flue gas discharged by the sintering unit 1 is introduced from the annular heat exchange jacket at the topmost part and flows out from the annular heat exchange jacket at the bottommost part.
The dust removal device 4 is a bag-type dust remover; the heat exchange device 3 is a dividing wall type heat exchanger.
When the white device system that disappears that this embodiment provided is utilized, the sintering flue gas has higher heat, and it lets in the annular heat transfer jacket in chimney 2, makes 2 inner walls of chimney heat up, carries out the heat transfer with the gas in the chimney 2 simultaneously to effectively avoid the formation of chimney 2 interior acid mist, improved the life of chimney 2. The gas flowing out of the annular heat exchange jacket of the chimney 2 still has higher temperature, and exchanges heat with the gas flowing out of the condensing device 7, so that the gas flowing into the chimney 2 is preheated, and meanwhile, the gas entering the dust removal device 4 has lower temperature, thereby effectively avoiding the damage of high-temperature gas to the structure of the dust removal device 4, and further improving the effect of white elimination.
Example 4
This embodiment provides a white device system that disappears of utilizing sintering flue gas heat, compares with embodiment 1, this embodiment the setting of the outstanding inside lining of annular heat transfer jacket in the chimney body, just the bottom surface of annular heat transfer jacket and 2 bottom surfaces of chimney are the contained angle 10, the outstanding inside lining of annular heat transfer jacket's distance is the position of annular heat transfer jacket, 5% of chimney body internal diameter. The rest is the same as in example 1.
Compared with the embodiment 1, the embodiment has the advantages that the annular heat exchange jacket protrudes out of the lining, so that the heat exchange effect of the annular heat exchange jacket and the flue gas is improved.
Example 5
This embodiment provides a white device system that disappears of utilizing sintering flue gas heat, compares with embodiment 1, this embodiment this internal annular heat transfer jacket outstanding inside lining setting of chimney, just the bottom surface of annular heat transfer jacket and 2 bottom surfaces of chimney are the contained angle of 5, the distance of the outstanding inside lining of annular heat transfer jacket is annular heat transfer jacket position, 2% of chimney body internal diameter. The rest is the same as in example 1.
Compared with the embodiment 1, the embodiment has the advantages that the annular heat exchange jacket protrudes out of the lining, so that the heat exchange effect of the annular heat exchange jacket and the flue gas is improved.
Example 6
This embodiment provides a white device system that disappears of utilizing sintering flue gas heat, compares with embodiment 3, this embodiment this internal annular heat transfer jacket outstanding inside lining setting of chimney, just the bottom surface of annular heat transfer jacket and 2 bottom surfaces of chimney are the contained angle of 8, the distance of annular heat transfer jacket outstanding inside lining is annular heat transfer jacket position, 4% of chimney body internal diameter. The rest is the same as in example 3.
Compared with the embodiment 3, the embodiment has the advantages that the annular heat exchange jacket protrudes out of the lining, so that the heat exchange effect of the annular heat exchange jacket and the flue gas is improved.
Example 7
Compared with the embodiment 4, the annular heat exchange jacket of the embodiment is communicated by the circular grid, and the rest is the same as that of the embodiment 4.
The circular grids are communicated with the same layer of annular heat exchange jacket, so that the uniformity of the temperature distribution of a heat source in the annular heat exchange jacket can be improved, the heat exchange area can be increased, and the heat exchange effect of the flue gas can be improved; however, the circular grid increases the cost of the annular heat exchange jacket and also increases the possibility of corrosion of the annular heat exchange jacket.
In summary, the heat jacket is replaced in the chimney, and the heat of the sintering flue gas is used as a heat source, so that the energy utilization rate of the flue gas heat is improved; the flue gas temperature in the chimney is high, so that the formation of acid mist can be effectively avoided, and the corrosion of the chimney can be effectively avoided; when the white smoke eliminating device system provided by the utility model is utilized, the sintering smoke has higher heat, and the sintering smoke is introduced into the annular heat exchange jacket in the chimney to heat up the inner wall of the chimney and exchange heat with the gas in the chimney, thereby effectively avoiding the formation of acid mist in the chimney and prolonging the service life of the chimney; the gas flowing out of the annular heat exchange jacket of the chimney still has higher temperature, and exchanges heat with the gas flowing out of the condensing device, so that the gas flowing into the chimney is preheated, and meanwhile, the temperature of the gas entering the dust removal device is lower, the damage of the high-temperature gas to the structure of the dust removal device is effectively avoided, and the whitening effect can be further improved.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. A white device system that disappears of utilizing sintering flue gas heat, characterized by that, said white device system that disappears includes sintering unit, chimney, heat transfer device, dust collector, exhaust-heat boiler, desulfurization and denitrification facility and condensing equipment;
the chimney comprises a chimney body, and annular heat exchange jackets are arranged at intervals in the lining of the chimney body along the axial direction of the chimney body;
the flue gas generated by the sintering unit flows into the dust removal device after sequentially flowing through the annular heat exchange jacket and the heat exchange device;
the dust removal device, the waste heat boiler, the desulfurization and denitrification device, the condensing device and the heat exchange device are sequentially connected with the chimney.
2. The whitening apparatus system of claim 1, wherein an annular heat exchange jacket within the chimney body is disposed protruding from the inner liner.
3. The white space eliminating device system as claimed in claim 2, wherein the bottom surface of the annular heat exchange jacket forms an angle of 5-10 ° with the bottom surface of the chimney.
4. The white space eliminating device system as claimed in claim 2 or 3, wherein the distance between adjacent annular heat exchange jackets is 10-20% of the height of the chimney body.
5. The apparatus according to claim 4, wherein the number of the annular heat exchange jackets is 3-6.
6. The whitening apparatus system of claim 5, wherein the flue gas outlet of the sintering unit is connected in parallel or in series with an annular heat exchange jacket.
7. The white space eliminating device system as claimed in claim 6, wherein when connected in series, the flue gas discharged from the sintering unit is introduced from the topmost annular heat exchange jacket and flows out from the bottommost annular heat exchange jacket.
8. The whitening device system of claim 1, wherein the annular heat exchange jackets are in communication by a circular grid.
9. The whitening device system of claim 1, wherein the dust removal device comprises a cyclone or a bag-type dust collector.
10. The whitening device system of claim 1, wherein the heat exchange device comprises a tube heat exchanger or a dividing wall heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121270570.4U CN214892660U (en) | 2021-06-08 | 2021-06-08 | White device system that disappears of utilizing sintering flue gas heat |
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|---|---|---|---|
| CN202121270570.4U CN214892660U (en) | 2021-06-08 | 2021-06-08 | White device system that disappears of utilizing sintering flue gas heat |
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| CN214892660U true CN214892660U (en) | 2021-11-26 |
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