CN210145833U - White smoke plume remove device with thick liquid cooling tray - Google Patents
White smoke plume remove device with thick liquid cooling tray Download PDFInfo
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- CN210145833U CN210145833U CN201920321210.9U CN201920321210U CN210145833U CN 210145833 U CN210145833 U CN 210145833U CN 201920321210 U CN201920321210 U CN 201920321210U CN 210145833 U CN210145833 U CN 210145833U
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Abstract
The utility model provides a white plume remove device with thick liquid cooling tray, including wet desulfurizing tower, thick liquid circulating system and outside circulating water system, be equipped with thick liquid pond, thick liquid from bottom to top in the tower body of wet desulfurizing tower in proper orderLiquid stops layer, thick liquid and sprays layer and defroster, the thick liquid pond sprays the layer through thick liquid circulation system for the thick liquid and carries the thick liquid, wet-type desulfurizing tower lower part is equipped with the flue gas import, the flue gas import is located the top of thick liquid pond liquid level, the thick liquid stops the layer and is located flue gas import and thick liquid and sprays between the layer, the thick liquid stops the in situ and is equipped with a plurality of layers of thick liquid cooling tray, set up the heat exchange tube in the thick liquid cooling tray, the heat exchange tube links to each other with external circulation water system through cooling water circulation pipeline, be equipped with recirculated cooling water in the heat exchange tube. The utility model provides a thick liquid cooling tray and white plume remove device flue gas condensation is effectual, with low costs, the place requires lowly to can improve SO2And (4) removing efficiency.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a technical field that coal-fired flue gas pollutant administers, especially a white plume remove device with thick liquid cooling tray.
[ background of the invention ]
With the improvement of environmental protection requirements, environmental protection departments and governments in provinces and cities such as Zhejiang province, Shanghai city, Bifen city, Zhenjiang city and the like have clear requirements on eliminating white smoke plume pollution of a chimney of a coal-fired unit, wherein the Bifen city, the Zhenjiang city and the like need to adopt a smoke condensation technology, and the smoke temperature is required to be reduced to below 47 ℃ and 45 ℃ in summer and winter respectively.
When the wet desulphurization process is adopted in the desulphurization system, the water content in the flue gas is high, SO that liquid condensate appears at the outlet of the chimney, and submicron-grade particles, soluble salt and SO are carried in the liquid condensate3And the pollutants can form smoke plume to pollute the periphery.
The existing flue gas cooling technology for white smoke plume control comprises the following steps:
1. and a slurry heat exchanger is arranged on a circulating pipeline for wet desulphurization, the temperature of sprayed slurry is reduced, and the slurry is contacted with flue gas, so that the temperature of the flue gas is reduced.
2. On the basis of a wet desulphurization tower, the tower body is raised, a spraying cooling layer is additionally arranged above a spraying layer, cooling water is sprayed on the flue gas, and the spraying water is separately recovered and separated from the existing spraying slurry through a water receiving disc), and the cooling is carried out in a circulating manner.
3. And a tubular heat exchanger is arranged at the downstream of the wet desulphurization tower and in front of a chimney, and comprises a metal tube heat exchanger, a fluoroplastic steel heat exchanger and the like.
The existing flue gas cooling technology for controlling white smoke plume has the corresponding disadvantages that:
1.1) the existing part is through arranging the heat exchanger on the thick liquid shower, with the device of white smoke of desulfurization thick liquid cooling and elimination, because contain solid particles such as gypsum in the thick liquid, the heat exchanger has appeared wearing and tearing, has revealed, has blockked up. 2) The slurry heat exchanger increases the resistance of circulating slurry, and the existing slurry circulating pump needs to be replaced when the pressure head allowance is insufficient, so that the cost is high. 3) Because the slurry circulating pipeline has compact structure and small pump room position, the arrangement and the supporting difficulty of the added slurry heat exchanger are high. 4) The investment cost is about 4000 ten thousand higher than that of a 600MW unit).
2. The tower body needs to be lifted up for the original desulfurizing tower, the modification project is large, the blowing-out project is long, and the cost is high. One 600MW unit costs about 5000 ten thousand)
3. The flue gas cooler arranged on the flue has the problems of abrasion, leakage, blockage and the like due to the fact that the flue gas contains particles and corrosive gas, so that the problems of increased running resistance, increased energy consumption, even equipment outage and the like are caused. The investment cost of the tubular heat exchanger is about 6000 ten thousand higher than that of a 600MW unit; the lower side of the circulating pipeline of most of the existing wet desulphurization towers is completely utilized, and the supports of the flue gas cooler, the slurry pipeline valves of the original equipment and the like cannot be arranged) and the maintenance difficulty of the flue gas cooler is high.
[ Utility model ] content
The purpose of the utility model is to solve the problems in the prior art and provide a slurry cooling supportThe white smoke plume removing device has good condensation effect, low cost and low site requirement, and can improve SO2And (4) removing efficiency.
For realizing the above-mentioned purpose, the utility model provides a white plume remove device with thick liquid cooling tray, including wet-type desulfurizing tower, thick liquid circulating system and external circulation water system, be equipped with thick liquid pond, thick liquid stop layer, thick liquid spray layer and defroster from bottom to top in the tower body of wet-type desulfurizing tower in proper order, the thick liquid pond sprays the layer through thick liquid circulating system for the thick liquid and carries the thick liquid, wet-type desulfurizing tower lower part is equipped with the flue gas import, the flue gas import is located the top of thick liquid pond liquid level, thick liquid stop layer is located flue gas import and thick liquid and sprays between the layer, the thick liquid stops the in situ and is equipped with a plurality of layers of thick liquid cooling tray, set up the supercooling in the thick liquid cooling tray, the heat transfer pipe leads to the hydrologic cycle pipeline and links to each other with external circulation water system, be.
Preferably, the slurry cooling trays are 1-2 layers, the openings in the slurry cooling trays are arranged in a staggered mode, and a slurry layer is formed on each layer of the slurry cooling trays.
Preferably, tray flushing devices are respectively arranged on the upper side and the lower side of each layer of slurry cooling tray, and flushing water inlet pipelines are connected to the tray flushing devices.
Preferably, the slurry spraying layers are 4-5 layers, and the spray heads of every two adjacent slurry spraying layers are arranged in a staggered mode.
Preferably, the external circulating water system further comprises a mechanical ventilation cooling tower, a cooling water pool is arranged at the bottom of the mechanical ventilation cooling tower, the cooling water pool is connected with a water inlet end of a cooling water circulating pipeline through a cooling water circulating pump, the cooling water circulating pump is a variable frequency pump, and a blade driving motor of the mechanical ventilation cooling tower is a variable frequency motor.
Preferably, a dosing device for adjusting the pH value of the circulating water is further arranged on the cooling water circulating pipeline.
Preferably, the slurry circulating system comprises 4-6 slurry circulating pipelines, each slurry circulating pipeline is provided with a slurry circulating pump, the slurry circulating pumps respectively convey slurry to a slurry spraying layer arranged in the wet desulfurization tower, and the slurry is vertically and uniformly sprayed into the wet desulfurization tower by the slurry spraying layer.
Preferably, the smoke exhaust pipeline of the wet desulfurization tower is directly connected with a chimney or is connected with the chimney after passing through a wet electric dust remover and a smoke reheater.
The utility model has the advantages that: the utility model discloses a be provided with thick liquid cooling tray, thick liquid spraying layer and defroster in the wet-type desulfurizing tower, be equipped with thick liquid cooling tray at thick liquid spraying layer downside, set up the heat exchange tube in the thick liquid cooling tray, form a thick liquid layer on every layer of thick liquid cooling tray, the flue gas passes thick liquid cooling tray from bottom to top, spray thick liquid top-down and rush into thick liquid layer to form high-speed, mixed flow gas-liquid solid (gas: flue gas; liquid: thick liquid; solid: thick liquid cooling tray and metal heat exchange tube) high-efficient contact zone in thick liquid layer, thereby reach efficient flue gas condensation effect and SO heat exchange tube2And (4) removing effect. Compared with the prior art, the utility model provides a thick liquid cooling tray and white plume remove device flue gas condensation is effectual, with low costs, the place requires lowly to can improve SO2And (4) removing efficiency.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic view of a white plume removal device with a slurry cooling tray according to the present invention;
fig. 2 is an enlarged schematic structural view of the white plume removing device with the slurry cooling tray of the present invention.
[ detailed description ] embodiments
Referring to fig. 1 and 2, the present invention relates to a white smoke plume removing device with slurry cooling tray, which comprises a wet desulfurization tower 1, a slurry circulation system and an external water circulation system, a slurry pool 2, a slurry retention layer 3, a slurry spraying layer 4 and a demister 5 are sequentially arranged in the tower body of the wet-type desulfurization tower 1 from bottom to top, the slurry pool 2 conveys slurry to the slurry spraying layer 4 through a slurry circulating system, the lower part of the wet-type desulfurizing tower 1 is provided with a flue gas inlet, the flue gas inlet is positioned above the liquid level of the slurry pool 2, the slurry retention layer 3 is positioned between the flue gas inlet and the slurry spraying layer 4, a plurality of layers of slurry cooling trays 31 are arranged in the slurry staying layer 3, heat exchange tubes are arranged in the slurry cooling trays 31, the heat exchange pipe is connected with an external circulating water system through a cooling water circulating pipeline 63, and circulating cooling water is arranged in the heat exchange pipe.
Further, slurry cooling tray 31 is 1-2 layers, and the trompil in slurry cooling tray 31 is the dislocation set to improve the contact efficiency of slurry and tray, thereby improve heat exchange efficiency, because regional slurry of tray, flue gas contact efficiency are high, the velocity of flow of flue gas and relative tray of slurry is high, and the heat transfer effect in this region is the best relatively other positions. Each slurry cooling tray forms a slurry layer 32 thereon. The upper and lower both sides of every layer of thick liquid cooling tray 31 are provided with tray washing unit 33 respectively, be connected with sparge water inlet pipe on the tray washing unit 33, according to flue gas resistance feedback signal and smoke temperature feedback signal, when cooling efficiency reduces after flue gas resistance risees, be interrupted through the high pressure water and wash thick liquid cooling tray (when resistance or smoke temperature are high, wash 2 minutes, do not wash at ordinary times), also accessible debugging regularly washes, guarantees heat exchange efficiency, eliminates and blocks up the risk. The slurry spraying layers 4 are 4-5 layers, and the spray heads of every two adjacent slurry spraying layers are arranged in a staggered mode so as to improve the contact rate of the slurry and the tray and further improve the heat exchange effect.
The external circulating water system further comprises a mechanical ventilation cooling tower 6, a cooling water pool 62 is arranged at the bottom of the mechanical ventilation cooling tower 6, the cooling water pool 62 is connected with a water inlet end of a cooling water circulating pipeline 63 through a cooling water circulating pump 64, the cooling water circulating pump 64 is a variable frequency pump, and a blade driving motor of the mechanical ventilation cooling tower 6 is a variable frequency motor. And a dosing device for adjusting the PH of the circulating water is also arranged on the cooling water circulating pipeline 63.
The slurry circulating system comprises 4-6 slurry circulating pipelines 41, each slurry circulating pipeline 41 is provided with a slurry circulating pump 42, each slurry circulating pump 42 is used for conveying slurry to the slurry spraying layer 4 arranged in the wet desulfurization tower 1, and the slurry is vertically and uniformly sprayed into the wet desulfurization tower 1 by the slurry spraying layer 4.
The smoke exhaust pipeline of the wet desulfurization tower 1 is directly connected with a chimney or is connected with the chimney after passing through a wet electric dust removal device and a smoke reheater.
The utility model relates to a white plume remove device's each equipment work flow with thick liquid cooling tray:
(1) flue gas flow:
after the coal-fired flue gas passes through the denitration and dust removal device, the flue gas with positive pressure passes through the draught fan and enters the desulfurizing tower, and SO is generated when main pollutants are contained in the flue gas2And the flue gas enters the tower body from bottom to top through an inlet flue of the desulfurizing tower, the inlet flue of the desulfurizing tower is arranged above the liquid level of a slurry pool of the tower body, the slurry pool is arranged at the bottom of the tower body, and the flue gas is guided by a guide plate of the inlet flue and then flows upwards uniformly and vertically.
The flue gas gets into thick liquid cooling tray, has arranged the heat exchange tube in the thick liquid cooling tray, sets up recirculated cooling water in the heat exchange tube, and the flue gas is reduced the temperature (one of the effect that the flue gas temperature reduces) through thick liquid cooling tray, and simultaneously, the SO in the flue gas2Fully contacts with the slurry to be removed by reaction, and fine particles in the flue gas are captured by condensed liquid drops and efficiently removed.
The flue gas passes through the slurry cooling tray and is cooled again by the slurry sprayed down by the slurry spraying layer (4-6 layers), and simultaneously SO2Again contacted with the slurry and removed again.
After the flue gas passes through the slurry spraying layer, SO in the flue gas2Is removed efficiently, the temperature of the flue gas is effectively reduced, but the flue gas carries liquid drops (liquid condensate water drops) during spraying, then the flue gas enters a demister layer, and the liquid drops are removed.
After the flue gas passes through the demister layer, the temperature of the flue gas is in a saturated state (water saturation), and at the moment, because the temperature of the flue gas is reduced, the moisture content is also reduced. Then the flue gas directly enters a chimney or enters the chimney after passing through equipment such as wet electric dust removal equipment, a flue gas reheater and the like, and is discharged into the atmosphere.
(2) And (3) a condensed water flow:
the lower side of the mechanical ventilation cooling tower is provided with a water tank, a certain amount of clean water is injected into the water tank before the unit is consigned, when the unit is consigned or a period of time before the consignment, water in the water tank is pumped into a cooling water circulation pipeline and enters a slurry cooling tray under the action of a cooling water circulation pump, the cooling water absorbs heat to flue gas and slurry through a heat exchange plate while passing through the slurry cooling tray, the temperature of the slurry and the temperature of the flue gas are reduced, the temperature of the cooling water is increased, the cooling water with increased temperature enters the mechanical ventilation cooling tower through the cooling water circulation pipeline, the temperature of the cooling water in the mechanical ventilation cooling tower is reduced, and the cooling water enters the water tank to complete a cycle.
The cooling water circulating pipeline is provided with a dosing device, the PH of the circulating water is properly adjusted by dosing, and the cooling water is sterilized.
(3) Slurry flow:
the lower side of the wet-type desulfurization tower is provided with a slurry pool, limestone slurry is injected into the slurry pool when the unit is consigned or a period of time before consignment, 4-6 slurry circulating pipelines are arranged on the outer side of the wet-type desulfurization tower, each slurry circulating pipeline is provided with a slurry circulating pump, the slurry circulating pipelines respectively convey slurry to a slurry spraying layer arranged in the wet-type desulfurization tower, and the slurry is vertically and uniformly sprayed into the wet-type desulfurization tower.
After being sprayed, the slurry is firstly contacted with the flue gas in the tower to carry out heat exchange and chemical reaction, and then enters the slurry cooling tray, and the slurry is vertically scoured with the slurry cooling tray due to the action of gravity, so that the relative speed of movement is achieved, the heat exchange efficiency is improved, and the scouring action can ensure that the slurry cooling tray is not blocked due to scaling to a certain degree. The aperture ratio of the slurry cooling tray is controlled, and the slurry is guaranteed to form a layer of stay layer above the tray, so that the heat exchange time and the contact efficiency among the flue gas, the slurry and the tray are guaranteed, the optimal heat exchange efficiency and the optimal desulfurization efficiency are achieved, and the resistance to the flue gas is controlled within a certain range.
The slurry passes through 1-2 layers of slurry cooling trays (comprising 1-2 layers of slurry staying layers) and enters a slurry pool, new limestone is replenished in the slurry pool, gypsum is recovered, and a cycle is completed.
(4) And (3) controlling a system flow:
controlling cooling circulating water: because the heat transfer effect of mechanical draft cooling tower is great with ambient temperature relation, when ambient temperature such as winter is lower, the heat transfer is effectual, through adjusting the cooling water circulating pump (setting up to the inverter pump) to energy saving consumed.
Or the motor of the mechanical ventilation cooling tower is set as a variable frequency motor, and the energy consumption is saved by adjusting the motor.
The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.
Claims (8)
1. The utility model provides a white plume remove device with thick liquid cooling tray which characterized in that: comprises a wet-type desulfurizing tower (1), a slurry circulating system and an external circulating water system, wherein a slurry pool (2), a slurry retention layer (3), a slurry spraying layer (4) and a demister (5) are sequentially arranged in a tower body of the wet-type desulfurizing tower (1) from bottom to top, the slurry tank (2) conveys slurry to the slurry spraying layer (4) through a slurry circulating system, the lower part of the wet-type desulfurization tower (1) is provided with a flue gas inlet which is positioned above the liquid level of the slurry pool (2), the slurry staying layer (3) is positioned between the flue gas inlet and the slurry spraying layer (4), a plurality of layers of slurry cooling trays (31) are arranged in the slurry staying layer (3), the slurry cooling tray (31) is internally provided with a heat exchange pipe, the heat exchange pipe is connected with an external circulating water system through a cooling water circulating pipeline (63), and circulating cooling water is arranged in the heat exchange pipe.
2. A white plume removal device having a slurry cooling tray, as claimed in claim 1, wherein: the slurry cooling trays (31) are 1-2 layers, holes in the slurry cooling trays (31) are arranged in a staggered mode, and a slurry layer (32) is formed on each layer of slurry cooling tray.
3. A white plume removal device having a slurry cooling tray, as claimed in claim 2, wherein: tray washing devices (33) are respectively arranged on the upper side and the lower side of each layer of slurry cooling tray (31), and washing water inlet pipelines are connected to the tray washing devices (33).
4. A white plume removal device having a slurry cooling tray, as claimed in claim 1, wherein: the slurry spraying layers (4) are 4-5 layers, and the spray heads of every two adjacent slurry spraying layers are arranged in a staggered mode.
5. A white plume removal device having a slurry cooling tray, as claimed in claim 1, wherein: the external circulating water system further comprises a mechanical ventilation cooling tower (6), a cooling water pool (62) is arranged at the bottom of the mechanical ventilation cooling tower (6), the cooling water pool (62) is connected with a water inlet end of a cooling water circulating pipeline (63) through a cooling water circulating pump (64), the cooling water circulating pump (64) is a variable frequency pump, and a blade driving motor of the mechanical ventilation cooling tower (6) is a variable frequency motor.
6. The white plume removal device having a slurry cooling tray as set forth in claim 5, wherein: and a dosing device for adjusting the PH of the circulating water is also arranged on the cooling water circulating pipeline (63).
7. A white plume removal device having a slurry cooling tray, as claimed in claim 1, wherein: the slurry circulating system comprises 4-6 slurry circulating pipelines (41), each slurry circulating pipeline (41) is provided with a slurry circulating pump (42), each slurry circulating pump (42) conveys slurry to a slurry spraying layer (4) arranged in the wet desulfurization tower (1), and the slurry is vertically and uniformly sprayed into the wet desulfurization tower (1) by the slurry spraying layer (4).
8. A white plume removal device having a slurry cooling tray, as claimed in claim 1, wherein: the smoke exhaust pipeline of the wet desulfurization tower (1) is directly connected with a chimney or is connected with the chimney after passing through a wet electric dust collector and a smoke reheater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920321210.9U CN210145833U (en) | 2019-03-14 | 2019-03-14 | White smoke plume remove device with thick liquid cooling tray |
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| CN201920321210.9U CN210145833U (en) | 2019-03-14 | 2019-03-14 | White smoke plume remove device with thick liquid cooling tray |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876638A (en) * | 2019-03-14 | 2019-06-14 | 浙江菲达环保科技股份有限公司 | A kind of white plume removing means with the cooling pallet of slurries |
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2019
- 2019-03-14 CN CN201920321210.9U patent/CN210145833U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876638A (en) * | 2019-03-14 | 2019-06-14 | 浙江菲达环保科技股份有限公司 | A kind of white plume removing means with the cooling pallet of slurries |
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