CN211998904U - Waste water treatment flue evaporator capable of preventing wall surface dust deposition - Google Patents
Waste water treatment flue evaporator capable of preventing wall surface dust deposition Download PDFInfo
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- CN211998904U CN211998904U CN201921109699.XU CN201921109699U CN211998904U CN 211998904 U CN211998904 U CN 211998904U CN 201921109699 U CN201921109699 U CN 201921109699U CN 211998904 U CN211998904 U CN 211998904U
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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
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Abstract
The utility model provides a prevent waste water treatment flue evaporator of wall area ash, including the inside flue evaporator who is equipped with waste water atomizing device, its characterized in that, along the direction of height of the evaporimeter section of thick bamboo wall of flue evaporator's the tuyere that sweeps that is located different regions of having arranged, every regional n sweeps the tuyere and arranges along evaporimeter section of thick bamboo wall circumference, every sweeps tuyere cooperation evaporimeter section of thick bamboo wall and will sweep the wind regime and separate into two parts of inside wind and outside wind and insufflate in the flue evaporator, wherein: the inside air flows out through the center of the blowing air nozzle to prevent unevaporated liquid drops from being bonded on the wall surface of the evaporator cylinder; the outside air forms a gas protective film covering the wall surface of the evaporator cylinder so as to sweep the dust deposition between the air nozzle and the wall surface of the evaporator cylinder. The utility model discloses prevent that the unevaporated liquid drop from bonding at the wall, protect the deposition of sweeping tuyere and evaporimeter section of thick bamboo wall simultaneously.
Description
Technical Field
The utility model relates to a desulfurization waste water treatment flue evaporation plant belongs to thermal power factory desulfurization system waste water treatment technical field.
Background
The vast majority of coal-fired power plants in China adopt a limestone-gypsum wet desulphurization process. In order to maintain the safe and stable operation of the wet desulphurization system, a certain amount of desulphurization wastewater must be discharged. The desulfurization waste water has very poor water quality, contains a large amount of sulfate radicals, chloride ions, calcium and magnesium ions, heavy metals and the like, and has strong pollution to the environment. Many of the heavy metal ions are the first pollutants required to be controlled in the national environmental protection standard, so the desulfurization wastewater must be separately treated.
The conventional desulfurization wastewater treatment system adopts a 'triple-box' chemical precipitation method, has complex process system, more equipment, poor working environment and high investment and operating cost, cannot remove chloride ions and the like in wastewater, and cannot be recycled. In the long run, the "triple box" process does not meet the environmental requirements. And with the strict requirements of the state on water resource management and wastewater discharge and the emergence of the policy of limiting discharge of high-salinity wastewater from part of local governments, the coal-fired power plant can meet the environmental protection requirement only by carrying out wastewater zero discharge work.
At present, the implemented coal-fired power plant wastewater zero discharge technology is divided from a tail end solidification mode, and mainly comprises a wastewater crystallization technology and a flue evaporation technology. The wastewater crystallization technology generally refers to that wastewater enters a multi-effect evaporator (MED) or a mechanical compression vapor evaporator (MVR) for concentration and crystallization after being pretreated, evaporated fresh water is recycled, and crystallized salt is separately treated. The flue evaporation technology is that the desulfurization waste water is atomized and sprayed into an evaporator, the moisture is evaporated by utilizing the heat of flue gas, and the generated solid impurities enter an electric dust remover along with the flue gas to be captured.
However, when the heat energy carried by the flue gas is not enough to evaporate the wastewater in a set time, and the wastewater droplets collide with the wall surface of the evaporator in the turbulent flow, the problems of scaling, dust deposition, corrosion and the like of the evaporator are easily caused particularly in the concentrated phase section of the wastewater droplets in the evaporator, and when the scale deposition and the dust deposition are serious, the wastewater droplets can drop to the bottom of the evaporator in a block shape, so that the outlet flue is blocked, and the operation of a wastewater evaporation system is stopped.
In order to solve the problems of scale deposition and dust accumulation of the evaporator, a mechanical scraper type dust scraping device is adopted, but the mechanical device is easy to block in a high-dust environment, and the implementation difficulty is high when the diameter is larger than 4 meters. Therefore, it is important to design an evaporator capable of reliably preventing deposition of ash on the wall surface of the evaporator.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the removal of deposited dust on the wall surface of the evaporator is unreliable.
In order to solve the technical problem, the technical scheme of the utility model provides a prevent waste water treatment flue evaporator of wall area ash, including inside flue evaporator that is equipped with waste water atomizing device, its characterized in that, the direction of height of the evaporimeter section of thick bamboo wall face along flue evaporator has arranged the tuyere that sweeps that is located different regions, and every regional n sweeps tuyere and arranges along evaporimeter section of thick bamboo wall circumference, and every sweeps tuyere cooperation evaporimeter section of thick bamboo wall face and will sweep the wind regime and separate into two parts of inboard wind and outside wind and insufflate in the flue evaporator, wherein: the inside air flows out through the center of the blowing air nozzle to prevent unevaporated liquid drops from being bonded on the wall surface of the evaporator cylinder; the outside air forms a gas protective film covering the wall surface of the evaporator cylinder so as to sweep the dust deposition between the air nozzle and the wall surface of the evaporator cylinder.
Preferably, the blowing air source is a pulse air source which is periodically or manually sent to the blowing air nozzle according to a program.
Preferably, the pulse air source is one of an air source, a hot smoke source, a primary air source and a secondary air source, or is formed by mixing at least two of the air source, the hot smoke source, the primary air source and the secondary air source.
Preferably, the blowing air nozzle comprises an air chamber and an air cylinder; the wall surface of the evaporator barrel is provided with an opening for mounting an air barrel, the air barrel is arranged in the opening, and a gap for forming the outside air is formed between the outer circumferential surface of the air barrel and the opening; one end of the air duct is an air outlet, and the other end of the air duct is an air inlet; the air inlet of the air cylinder is communicated with an air chamber, the air chamber is arranged on the wall surface of the evaporator cylinder, the air chamber completely covers the air inlet of the current air cylinder and the corresponding opening, and the air chamber is communicated with the blowing air source; and the air outlet of the air duct penetrates through the wall surface of the evaporator tube and extends into the flue evaporator.
Preferably, the air outlet of the air duct is trumpet-shaped.
Preferably, the air duct is fixed to the air chamber by fixing ribs arranged in a circumferential direction.
Preferably, each air chamber is connected with one end of the pulse generating device through a respective switch valve and a first regulating valve, and the other end of the pulse generating device is communicated with the air source, the hot smoke source, the primary air source and the secondary air source.
Preferably, the air source comprises an air inlet, and the air inlet is connected with the other end of the pulse generating device through a first booster fan, a heater and a second regulating valve; the hot smoke source is connected with the other end of the pulse generating device through a booster fan II and a regulating valve III; and the primary air source and the secondary air source are respectively connected with the other end of the pulse generating device through respective regulating valves.
Preferably, an included angle α between a center line of each of the purging air nozzles and a center line of a wall surface of the evaporator cylinder and an included angle β between the center line of each of the purging air nozzles and a radial line of the central cylinder of the flue evaporator are set differently according to different flow fields.
Compared with the prior art, the utility model provides a novel prevent waste water treatment flue evaporimeter of wall deposition has following beneficial effect: the dust deposition removing and blowing air nozzle device of the utility model divides the blowing air source into an inner side air part and an outer side air part through the combined action of the air duct and the hole on the wall of the evaporator, the inner side air flows out through the center of the air duct, and the unevaporated liquid drops are prevented from being bonded on the wall surface; outside wind enters along the gap between the outside of the wind barrel and the opening of the wall of the evaporator barrel, and forms an air protection film covering the wall of the evaporator barrel through the flow guiding effect of the trumpet-shaped air outlet end, so that dust deposition on the wall of the evaporator barrel and the blowing air nozzle is protected. The blowing air source is hot air, and evaporation of liquid drops close to the wall surface of the evaporator can be accelerated. The arrangement angle of the blowing air nozzle is arranged according to the requirement of an internal flow field. The whole dust removing equipment is blown by hot gas, so that the operation reliability is high.
Drawings
FIG. 1 is a schematic view of a waste water treatment flue evaporator system for preventing wall dust deposition;
FIGS. 2A and 2B are schematic cross-sectional views of a purge tuyere;
fig. 3A and 3B are schematic layout views of the purge tuyere.
Description of reference numerals:
the system comprises a flue evaporator 1, an evaporator barrel wall 2, a wastewater atomization device 3, a blowing air nozzle 4, a regulating valve I5-1, a regulating valve II 5-2, a regulating valve II 6, a switch valve 7, a booster fan I7, a heater 8, an air inlet 9, a hot smoke source 10, a primary air source 11, a secondary air source 12, an air chamber 41, an air barrel 42 and a fixed rib 43.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
Fig. 1 is a schematic diagram of a wall-area ash-proof wastewater treatment flue evaporator system disclosed in this embodiment, and the wall-area ash-proof wastewater treatment flue evaporator includes a flue evaporator 1, an evaporator cylinder wall surface 2, a wastewater atomization device 3, a blowing air nozzle 4, a first adjusting valve 5-1, a second adjusting valve 5-2, a switch valve 6, a first booster fan 7, a heater 8, an air source, a hot flue gas source 10, a primary air source 11, a secondary air source 12, and the like. Fig. 2A and 2B are schematic cross-sectional views of the purge tuyere of the present embodiment, and the purge tuyere 4 mainly includes a wind chamber 41, a wind tube 42, a fixing rib 43, and the like.
The flue evaporator 1 is internally provided with a waste water atomization device 3. The purging air nozzles 4 are arranged in different areas of the wall surface 2 of the evaporator cylinder along the height direction, and the n purging air nozzles 4 in each area are arranged along the circumferential direction. Openings are provided in the evaporator tube wall 2, each of which can receive a blowing tuyere 4. Referring to fig. 2A and 2B, an air inlet of an air duct 42 of the blowing nozzle 4 is connected to the air chamber 41, and an air outlet of the air duct 42 extends into the evaporator 1 after passing through the wall surface 2 of the evaporator. The air outlet of the air duct 42 is trumpet-shaped, the diameter of the air chamber 41 is larger than the diameter of the opening on the wall surface 2 of the evaporator tube, and a gap is formed between the air duct 42 and the opening. The air duct 42 is fixed to the air chamber 41 by fixing ribs 43. The air chamber 41 is communicated with a purging air source. The blowing air nozzle 4 divides the blowing air source into an inner side air part and an outer side air part through the combined action of the air duct 42 and the opening on the wall surface 2 of the evaporator tube. The inside air flows out through the center of the air duct 42, and the unevaporated liquid drops are prevented from being bonded on the wall surface of the evaporator tube wall surface 2. Outside air enters along the gap between the outside of the air duct 42 and the opening of the wall surface 2 of the evaporator tube, and forms a gas protective film covering the wall surface 2 of the evaporator tube through the flow guiding effect of the horn-shaped air outlet of the air duct 42, so that dust deposition between the blowing air nozzle 4 and the wall surface of the wall surface 2 of the evaporator tube is protected. The blowing air source is hot air, and evaporation of liquid drops close to the wall surface of the evaporator cylinder wall surface 2 can be accelerated.
As shown in fig. 1, in a specific application, the purge air source can be obtained through the following four ways:
firstly, cold air enters a booster fan I7 through an air inlet 9, the pressure is increased, then the cold air enters a heater 8 for heating, and a heated air source serves as a blowing air source. Wherein the heat source path is provided with a second regulating valve 5-2.
And secondly, adopting a hot flue gas source 10, and taking hot flue gas as a purging heat source after entering a booster fan II through a hot flue gas inlet and being pressurized. Wherein the heat source path is provided with a third regulating valve.
And thirdly, adopting a primary air source 11, and taking primary air of the boiler as a purging heat source after entering a booster fan through a primary air inlet and being pressurized. Wherein the heat source path is provided with a fourth regulating valve.
And fourthly, adopting a secondary air source 12, and taking secondary air of the boiler as a purging heat source after entering a booster fan through a secondary air inlet and being pressurized. Wherein the heat source path is provided with a regulating valve V.
The blowing air source can be obtained by one or more ways selected from the above ways. And a pulse generating device 13 is arranged on a pipeline for the blowing air source to enter the blowing nozzle, and the pulse air source is sent to the blowing air nozzle 4 periodically or manually according to a program so as to remove the dust deposited on the blowing air nozzle 4. And a switching valve 6 and a regulating valve I5-1 are arranged on a connecting pipeline of the blowing air source and the blowing air nozzle 4.
With reference to fig. 3A and 3B, the included angle α between the center line of each purge tuyere 4 and the center line of the wall surface 2 of the evaporator, and the included angle β between the center line of the purge tuyere 4 and the radial line of the central tube of the evaporator 1 are set differently according to the different flow fields.
Claims (9)
1. The utility model provides a prevent waste water treatment flue evaporimeter of wall area ash, including inside flue evaporimeter (1) that is equipped with waste water atomizing device (3), its characterized in that, along the direction of height of evaporimeter section of thick bamboo wall (2) of flue evaporimeter (1) arranged and be located the blast tuyere (4) that sweeps of different regions, every regional n sweeps blast tuyere (4) and arranges along evaporimeter section of thick bamboo wall (2) circumference, every sweeps blast tuyere (4) cooperation evaporimeter section of thick bamboo wall (2) will sweep the wind source and separate into two parts of inboard wind and outside wind and blow in flue evaporimeter (1), wherein: the inside air flows out through the center of the blowing air nozzle (4) to prevent unevaporated liquid drops from being bonded on the wall surface (2) of the evaporator cylinder; the outside air forms a gas protective film covering the wall surface (2) of the evaporator cylinder so as to purge the dust deposition between the air nozzle (4) and the wall surface (2) of the evaporator cylinder.
2. The waste water treatment flue evaporator for protection against wall area ash of claim 1, characterized in that said source of purge air is a pulsed source of air sent periodically or manually programmed to said purge tuyere (4).
3. The waste water treatment flue evaporator for preventing wall area ash of claim 2, wherein the pulse air source is one of an air source, a hot flue gas source (10), a primary air source (11) and a secondary air source (12), or is a mixture of at least two of the air source, the hot flue gas source (10), the primary air source (11) and the secondary air source (12).
4. The waste water treatment flue evaporator for preventing ash in wall area of claim 1, wherein the blowing tuyere (4) comprises an air chamber (41) and an air duct (42); the wall surface (2) of the evaporator barrel is provided with an opening for installing an air barrel (42), the air barrel (42) is arranged in the opening, and a gap for forming the outside air is formed between the outer circumferential surface of the air barrel (42) and the opening; one end of the air duct (42) is an air outlet, and the other end is an air inlet; an air inlet of the air cylinder (42) is communicated with an air chamber (41), the air chamber (41) is arranged on the wall surface (2) of the evaporator cylinder, the air chamber (41) completely covers the air inlet of the current air cylinder (42) and the corresponding opening, and the air chamber (41) is communicated with the purging air source; the air outlet of the air duct (42) penetrates through the wall surface (2) of the evaporator tube and extends into the flue evaporator (1).
5. The waste water treatment flue evaporator for preventing ash in wall area of claim 4, wherein the air outlet of the air duct (42) is in a horn shape.
6. The wall area ash resistant waste water treatment flue evaporator as set forth in claim 4 wherein said air duct (42) is fixed to said air chamber (41) by circumferentially disposed fixing ribs (43).
7. The waste water treatment flue evaporator for preventing ash in wall area of claim 4, wherein each air chamber (41) is connected with one end of the pulse generating device (13) through a respective switch valve (6) and a regulating valve (5-1), and the other end of the pulse generating device (13) is communicated with the air source, the hot smoke source (10), the primary air source (11) and the secondary air source (12).
8. The wall area ash resistant wastewater treatment flue evaporator as set forth in claim 7, wherein said air source comprises an air inlet (9), said air inlet (9) being connected to the other end of said pulse generating device (13) via a first booster fan (7), a heater (8) and a second regulating valve (5-2); the hot smoke source (10) is connected with the other end of the pulse generating device (13) through a booster fan II and a regulating valve III; the primary air source (11) and the secondary air source (12) are respectively connected with the other end of the pulse generating device (13) through respective regulating valves.
9. The wall area ash-proof waste water treatment flue evaporator as recited in claim 1, wherein the angle α between the center line of each of said blowing nozzles (4) and the center line of the wall surface (2) of said evaporator tube and the angle β between the center line of the tube diameter of said flue evaporator (1) are set differently according to the flow field.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921109699.XU CN211998904U (en) | 2019-07-15 | 2019-07-15 | Waste water treatment flue evaporator capable of preventing wall surface dust deposition |
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| CN201921109699.XU CN211998904U (en) | 2019-07-15 | 2019-07-15 | Waste water treatment flue evaporator capable of preventing wall surface dust deposition |
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| CN211998904U true CN211998904U (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110372057A (en) * | 2019-07-15 | 2019-10-25 | 上海发电设备成套设计研究院有限责任公司 | A kind of wastewater treatment flue evaporator of anti-wall surface dust stratification |
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- 2019-07-15 CN CN201921109699.XU patent/CN211998904U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110372057A (en) * | 2019-07-15 | 2019-10-25 | 上海发电设备成套设计研究院有限责任公司 | A kind of wastewater treatment flue evaporator of anti-wall surface dust stratification |
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