CN110898636A - Prevent deposiing wet flue gas desulfurization system - Google Patents
Prevent deposiing wet flue gas desulfurization system Download PDFInfo
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title abstract description 17
- 239000003546 flue gas Substances 0.000 title abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 title description 20
- 230000023556 desulfurization Effects 0.000 title description 20
- 239000002002 slurry Substances 0.000 claims abstract description 244
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 20
- 238000000889 atomisation Methods 0.000 abstract description 9
- 238000001556 precipitation Methods 0.000 abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 40
- 235000011941 Tilia x europaea Nutrition 0.000 description 40
- 239000004571 lime Substances 0.000 description 40
- 239000007789 gas Substances 0.000 description 14
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000005507 spraying Methods 0.000 description 7
- 239000003595 mist Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000779 smoke Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000009688 liquid atomisation Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention provides a precipitation-preventing wet desulphurization system, and relates to the field of flue gas desulphurization. The anti-precipitation wet desulphurization system comprises a first slurry container, a second slurry container and an atomizer, wherein the first slurry container is provided with a slurry inlet and an overflow port, the second slurry container is provided with a slurry supply port and a recovery port, a slurry inlet pipeline is connected between the slurry supply port and the slurry inlet port, a delivery pump is arranged on the slurry inlet pipeline, and an overflow pipeline is connected between the overflow port and the recovery port; the lower side of the overflow port of the first slurry container is provided with a slurry outlet, a slurry outlet pipeline is connected between the slurry outlet and the atomizer, and the height difference between the overflow port and the atomizer forms the atomizing pressure. Forming an internal circulation flow path between the first slurry storage tank and the second slurry container; on one hand, the height difference between the liquid level of the slurry and the atomizer is kept unchanged, and the atomization pressure generated on the atomizer is further ensured to be unchanged; on the other hand, the slurry in the first slurry tank is circulated and circulated, and the precipitation is not easily generated.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a precipitation-preventing wet desulphurization system.
Background
In thermal power generation, fuel combustion produces a large amount of flue gas containing toxic components, wherein acidic substances such as sulfur dioxide, hydrogen chloride and hydrogen fluoride in the flue gas are main pollutants causing air pollution.
At present, the wet desulphurization technology is generally adopted to carry out leaching on the flue gas, namely lime slurry is sprayed into slurry water mist through a spraying device, and the slurry water mist reacts with sulfur dioxide to form harmless components, so that the aim of neutralizing the desulfurized flue gas is fulfilled.
If the Chinese utility model patent with the publication number of CN205340554U and publication number of 2016.06.29 discloses a desulfurization prewashing reaction device, and specifically discloses that the desulfurization prewashing reaction device comprises an air inlet chamber, a middle gas-liquid spraying reaction chamber and an upper gas chamber, wherein the right side of the air inlet chamber is provided with a flue gas inlet, and the angle between the axis of the flue gas inlet and the horizontal direction is 15-17 degrees; the middle gas-liquid spraying reaction chamber is positioned above the air inlet chamber and comprises a plurality of spraying layers, and a plurality of nozzles are uniformly distributed on each spraying layer; the upper gas chamber is positioned above the middle gas-liquid spraying reaction chamber, and the right side of the upper gas chamber is provided with a flue gas outlet. The flue gas inlet is obliquely arranged, so that slurry is prevented from flowing backwards into an inlet flue, the flue is prevented from being corroded, and the inlet of the booster fan is prevented from being corroded, so that the booster fan can stably run; the middle gas-liquid spraying reaction chamber washes the smoke dust at the inlet, thereby achieving the effects of desulfurization and dust removal.
In the desulfurization technique, in order to reduce the granularity of water smoke, guarantee can with the sulfur dioxide fully reaction in the flue gas, not only can adopt spray set to produce thick liquid water smoke, also can adopt the atomizer to lime thick liquid atomization treatment, utilize the atomizing disk high-speed rotation among the atomizer to break up the thick liquid and form the fog. However, in order to prevent the slurry from impacting and damaging the atomizing disc, the atomizer generally requires the atomizing pressure to be stabilized at a lower level, and the slurry pump and the pressure valve are used for controlling the liquid feeding to the atomizer, so that the atomizing pressure is difficult to be ensured to be stable; further, the lime slurry is likely to undergo scale deposition by standing in the slurry vessel.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a precipitation prevention wet desulphurization system to solve the problems that the atomization pressure is difficult to ensure to be stable in the existing desulphurization system, and the lime slurry is easy to generate scaling precipitation due to standing in a slurry container.
The technical scheme of the precipitation-preventing wet desulphurization system comprises the following steps:
the anti-precipitation wet desulphurization system comprises a first slurry container, a second slurry container and an atomizer, wherein the first slurry container is provided with a slurry inlet and an overflow port, the second slurry container is provided with a slurry supply port and a recovery port, a slurry inlet pipeline is connected between the slurry supply port and the slurry inlet port, a delivery pump is arranged on the slurry inlet pipeline, and an overflow pipeline is connected between the overflow port and the recovery port;
the first slurry container is provided with a slurry outlet at the lower side of the overflow port, a slurry outlet pipeline is connected between the slurry outlet and the atomizer, and the height difference between the overflow port and the atomizer forms the atomizing pressure.
Has the advantages that: a slurry inlet pipeline and an overflow pipeline are communicated between the first slurry container and the second slurry container, when the slurry level in the first slurry container is higher than the overflow port, the excess lime slurry is discharged from the overflow port, and the overflowed lime slurry flows back to the second slurry container through the overflow pipeline, so that an internal circulation flow path is formed between the first slurry container and the second slurry container; on one hand, the slurry in the first slurry container is ensured to be always stabilized at a set amount, the set amount is the volume of the slurry when the liquid level is just flush with the overflow port, so that the height difference between the liquid level of the slurry in the first slurry container and the atomizer is kept unchanged, and the atomization pressure generated on the atomizer is further ensured to be unchanged; on the other hand, the slurry originally standing in the first slurry container can circulate, and the lime slurry flowing continuously is not easy to generate precipitation, so that the lime slurry can play an effective desulfurization role all the time.
Further, the first slurry container is disposed at a higher position than the second slurry container.
Furthermore, the first slurry container is a first slurry storage tank, and a support frame is arranged at the bottom of the first slurry storage tank.
Further, the first slurry storage tank is a sealed tank body, a pressure balance hole is formed in the first slurry storage tank, and a pressure release valve is arranged at the pressure balance hole.
Furthermore, a flow meter and a flow regulating valve are sequentially connected in series on the slurry outlet pipeline along the slurry outlet flow direction.
Furthermore, a first bypass interface is arranged on the upper stream of the flow meter on the slurry outlet pipeline, a second bypass interface is arranged on the lower stream of the flow regulating valve on the slurry outlet pipeline, and an emergency bypass is connected in parallel between the first bypass interface and the second bypass interface.
Furthermore, it has concatenated first emergency valve to be located between first bypass interface and the flowmeter on the play thick liquid pipeline, it has concatenated the second emergency valve to be located between second bypass interface and the flow control valve on the play thick liquid pipeline, it has still concatenated emergent main valve on the emergent bypass.
Furthermore, still install agitating unit in the first thick liquid storage tank, agitating unit includes driving motor and installs the stirring structure on driving motor's main shaft.
Further, the bottom of the first slurry storage tank is also provided with an emptying port, and an emptying valve is arranged at the emptying port.
Further, the overflow pipeline comprises an inclined section connected to the overflow port, and the inclined section extends in an inclined downward direction.
Drawings
Fig. 1 is a schematic view of the precipitation-preventing wet desulfurization system according to embodiment 1 of the present invention.
In the figure: 1-a first slurry storage tank, 10-a support frame, 11-a slurry inlet, 12-an overflow port, 13-a slurry outlet, 14-a stirring device, 140-a driving motor, 141-a stirring structure, 15-a pressure balancing hole, 150-a pressure relief valve, 16-an emptying valve, 2-a second slurry container, 21-a slurry supply port, 22-a recovery port, 3-an atomizer, 4-a slurry inlet pipeline, 40-a slurry inlet branch, 41-a delivery pump, 5-an overflow pipeline, 50-an inclined section, 6-a slurry outlet pipeline, 60-an emergency main valve, 61-an emergency bypass, 62-a flow meter, 63-a flow regulating valve, 64-a first emergency valve and 65-a second emergency valve.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In a specific embodiment 1 of the anti-precipitation wet desulfurization system of the present invention, as shown in fig. 1, the anti-precipitation wet desulfurization system includes a first slurry container, a second slurry container 2, and an atomizer 3, in this embodiment, the first slurry container is a first slurry storage tank 1, a slurry inlet 11, an overflow 12, and a slurry outlet 13 are provided on the first slurry storage tank 1, a slurry supply port 21 and a recovery port 22 are provided on the second slurry container 2, a slurry supply pipeline 4 is connected between the slurry supply port 21 of the second slurry container 2 and the slurry inlet 11 of the first slurry storage tank 1, a transfer pump 41 is provided on the slurry supply pipeline 4, and lime slurry in the second slurry container 2 is pumped into the first slurry storage tank 1 by activating the transfer pump 41. The overflow conduit 5 comprises an inclined section 50 connected to the overflow opening 12, the inclined section 50 extending in an inclined downward direction to ensure that excess lime slurry overflowing the overflow opening 12 can be completely returned to the second slurry container 2.
It should be noted that, the specific structure of the second slurry container 2 may be a slurry storage tank, the prepared lime slurry is stored in the second slurry container 2, and when the desulfurization system is started, the lime slurry is pumped into the first slurry storage tank 1 from the second slurry container 2 through the slurry inlet pipeline 4, and then enters the subsequent atomization treatment process from the first slurry storage tank 1, so as to achieve the purpose of wet desulfurization of the flue gas. In other embodiments, the structure of the second slurry container is not limited to the form of the slurry storage tank, and in order to adapt to actual use requirements, the second slurry container can also be a slurry tank or a slurry groove, so that the construction of the slurry tank or the slurry groove is more convenient, and the requirement of storing lime slurry in a large capacity can be met. Two slurry supply ports 21 are distributed on the second slurry container 2, correspondingly, the slurry inlet pipeline 4 comprises two slurry inlet branch pipelines 40 which are arranged in parallel, the two slurry inlet branch pipelines 40 are respectively communicated with the two slurry supply ports 21, and the two slurry inlet branch pipelines 40 are respectively connected with a conveying pump 41 in series, so that slurry is prevented from depositing and blocking the slurry inlet pipeline 4.
An overflow pipeline 5 is connected between the overflow port 12 of the first slurry storage tank 1 and the recovery port 22 of the second slurry container 2; the slurry outlet 13 is arranged at the lower side of an overflow port 12 of the first slurry storage tank 1, a slurry outlet pipeline 6 is connected between the slurry outlet 13 and the atomizer 3, and the height difference between the overflow port 12 and the atomizer 3 forms the atomization pressure. A slurry inlet pipe 4 and an overflow pipe 5 are connected between the first slurry tank 1 and the second slurry tank 2, and when the level of the lime slurry in the first slurry tank 1 is higher than the overflow port 12, excess lime slurry is discharged from the overflow port 12, and the overflowed lime slurry flows back to the second slurry tank 2 through the overflow pipe 5, thereby forming an internal circulation flow path between the first slurry tank 1 and the second slurry tank 2.
On one hand, the lime slurry in the first slurry storage tank 1 is ensured to be always stabilized at a set amount, the set amount is the volume of the lime slurry when the liquid level is just flush with the overflow port 12, so that the height difference between the liquid level of the lime slurry in the first slurry storage tank 1 and the atomizer 3 is kept unchanged, the adopted model of the atomizer 3 is KS-900, the atomization pressure generated on the atomizer 3 is further ensured to be unchanged, and the lime slurry is prevented from impacting and damaging the inside of the atomizer 3; on the other hand, the lime slurry originally standing in the first slurry storage tank 1 is circulated, and the lime slurry flowing continuously is not easy to precipitate, so that the lime slurry can play an effective desulfurization role all the time.
In order to further ensure the desulfurization efficacy of the lime slurry, the first slurry storage tank 1 is a sealed tank body, the lime slurry is isolated from the outside air through the sealed tank body, the reaction of carbon dioxide in the air and effective components in the lime slurry is prevented, and the lime slurry is prevented from losing the desulfurization efficacy. The first slurry tank 1 is further provided with a stirring device 14, and the stirring device 14 comprises a driving motor 140 and a stirring structure 141 arranged on a main shaft of the driving motor 140. In this embodiment, the stirring structure 141 is a stirring blade, and the lime slurry in the first slurry storage tank 1 is stirred by the stirring blade, so that the lime slurry is always in a motion state, and effective components in the lime slurry are prevented from being precipitated and separated. Meanwhile, in order to ensure that the internal gas pressure in the first slurry tank 1 is stable, a pressure balance hole 15 is formed at the top position of the first slurry tank 1, and a pressure release valve 150 is arranged at the pressure balance hole 5.
In this embodiment, the relief valve 150 is a spring-type relief valve, and the set pressure value is 101kPa, which is balanced with the atmospheric pressure. When too much gas is accumulated in the first slurry storage tank 1 and the internal gas pressure exceeds the set pressure value of the pressure release valve 150, the gas acts on the valve flap and compresses the spring, so that the valve flap and the valve seat are separated to form a pressure release channel, the internal gas escapes to the outside of the first slurry storage tank 1, and the internal gas pressure in the first slurry storage tank 1 is ensured to be balanced with the external gas pressure. In other embodiments, for the different user demands of adaptation, the relief valve is not restricted to the spring relief valve, still can be for lever relief valve or pulsed relief valve, when inside gas pressure exceeded the set pressure value of relief valve, can make inside gas escape outside first thick liquid storage tank equally, guarantees that inside gas pressure in the first thick liquid storage tank is balanced with external atmospheric pressure.
In addition, in order to avoid the sediment from accumulating in the first slurry storage tank 1 and affecting the smoothness of the circulation of the lime slurry in the pipeline, a drain opening is also arranged at the bottom of the first slurry storage tank 1, and a drain valve 16 is arranged at the drain opening. Specifically, the bottom of first thick liquid storage tank 1 is equipped with the conical tank bottom, and the conical tank bottom is narrow shape under the wide, more is favorable to thoroughly emptying the precipitate in first thick liquid storage tank 1, has guaranteed whole desulfurization system's clean degree.
In this embodiment, the bottom of the first slurry storage tank 1 is provided with a support frame 10, the first slurry storage tank 1 is lifted to a set height by the support frame 10, and the first slurry storage tank 1 is arranged at a position higher than the second slurry container 2, so that the first slurry storage tank 1 and the second slurry container 2 are distributed up and down. The first slurry storage tank 1 is arranged below the upper second slurry container 2, and a pump body specially arranged on the overflow pipeline 12 is omitted, so that redundant lime slurry discharged from the overflow port 12 can flow back to the second slurry container 2 by utilizing the gravity of the first slurry storage tank, and the structure of the whole system is simpler; moreover, the height difference between the liquid level of the lime slurry in the first slurry storage tank 1 and the atomizer 3 is ensured to be enough to form the required atomization pressure, and a special pressurizing device arranged on the slurry outlet pipeline 6 is omitted.
In order to effectively control the atomization efficiency of the atomizer 3, a flow meter 62 and a flow regulating valve 63 are sequentially connected in series on the slurry outlet pipeline 6 along the slurry outlet flow direction, the atomization rate of lime slurry is correspondingly adjusted according to the flue gas flow in the flue, and if the flue gas flow is large and the sulfur dioxide content is high, the opening degree of the flow regulating valve 63 is adjusted, so that the atomizer 3 generates more slurry mist to fully neutralize and desulfurize. On the contrary, if the flue gas flow is small and the sulfur dioxide content is low, the opening degree of the flow regulating valve 63 is reduced, and the slurry mist quantity generated by the atomizer 3 is reduced, so that unnecessary waste of lime slurry is avoided.
In order to prevent blockage between the flow meter 62 and the flow regulating valve 63 of the slurry outlet pipeline 6, a first bypass interface is arranged on the slurry outlet pipeline 4 at the upstream of the flow meter 62, a second bypass interface is arranged on the slurry outlet pipeline 4 at the downstream of the flow regulating valve 63, and an emergency bypass 61 is connected in parallel between the first bypass interface and the second bypass interface. A first emergency valve 64 is connected in series between the first bypass port and the flow meter 62 on the slurry outlet pipeline 4, a second emergency valve 65 is connected in series between the second bypass port and the flow regulating valve 63 on the slurry outlet pipeline 4, and an emergency main valve 60 is also connected in series on the emergency bypass 61. In use, if the slurry outlet pipeline 6 between the flow meter 62 and the flow regulating valve 63 is blocked, the first emergency valve 64 and the second emergency valve 65 can be closed, and the emergency main valve 60 is opened, so that lime slurry can enter the subsequent atomizer 3 through the emergency bypass 61, and the working reliability of the whole system is ensured.
In order to adapt to different use requirements, the first slurry container is not limited to a sealed slurry storage tank, but also can be an open slurry storage tank, namely, the slurry storage tank is provided with a top opening, the inside of the slurry storage tank is directly communicated with the outside atmosphere through the top opening, and the balance of the internal and external gas pressures is ensured. Alternatively, the open slurry storage tank may be further replaced with a slurry pond or tank.
In order to meet different use requirements and simplify the internal structure of the first slurry storage tank, the stirring device can be directly omitted, and lime slurry flows through the internal circulation between the first slurry storage tank and the second slurry container, so that the lime slurry in the first slurry storage tank is prevented from standing still to generate precipitation, and the lime slurry can play an effective desulfurization role all the time. In addition, the lime slurry can be replaced by other desulfurization slurry added with a catalyst while meeting the desulfurization requirement.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A precipitation-preventing wet desulphurization system is characterized by comprising a first slurry container, a second slurry container and an atomizer, wherein the first slurry container is provided with a slurry inlet and an overflow port, the second slurry container is provided with a slurry supply port and a recovery port, a slurry inlet pipeline is connected between the slurry supply port and the slurry inlet port, a delivery pump is arranged on the slurry inlet pipeline, and an overflow pipeline is connected between the overflow port and the recovery port;
the first slurry container is provided with a slurry outlet at the lower side of the overflow port, a slurry outlet pipeline is connected between the slurry outlet and the atomizer, and the height difference between the overflow port and the atomizer forms the atomizing pressure.
2. The system according to claim 1, wherein the first slurry container is disposed at a higher position than the second slurry container.
3. The system according to claim 2, wherein the first slurry container is a first slurry tank, and a support frame is provided at the bottom of the first slurry tank.
4. The system according to claim 3, wherein the first slurry tank is a sealed tank, and the first slurry tank is provided with a pressure balance hole, and a pressure release valve is arranged at the pressure balance hole.
5. The system according to any one of claims 1 to 4, wherein a flow meter and a flow control valve are connected in series on the slurry outlet pipeline in the slurry outlet flow direction.
6. The system according to claim 5, wherein a first bypass port is provided on the slurry outlet pipe upstream of the flow meter, a second bypass port is provided on the slurry outlet pipe downstream of the flow control valve, and an emergency bypass is connected in parallel between the first bypass port and the second bypass port.
7. The system of claim 6, wherein a first emergency valve is connected in series between the first bypass port and the flow meter on the slurry outlet pipeline, a second emergency valve is connected in series between the second bypass port and the flow regulating valve on the slurry outlet pipeline, and an emergency main valve is further connected in series on the emergency bypass pipeline.
8. The system according to claim 3, wherein a stirring device is further installed in the first slurry tank, and the stirring device comprises a driving motor and a stirring structure installed on a main shaft of the driving motor.
9. The system according to claim 3, wherein a drain is further provided at the bottom of the first slurry tank, and a drain valve is provided at the drain.
10. The system according to claim 1, wherein the overflow line comprises an inclined section connected to the overflow port, the inclined section extending in an obliquely downward direction.
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| CN201911068149.2A CN110898636A (en) | 2019-11-04 | 2019-11-04 | Prevent deposiing wet flue gas desulfurization system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644279A (en) * | 2020-05-15 | 2020-09-11 | 西安西矿环保科技有限公司 | Low-pressure slurry supply device |
| CN113426281A (en) * | 2021-07-23 | 2021-09-24 | 杭州富丽达热电有限公司 | Wet desulphurization system |
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