CN111646621A - Coal gasification ash water vacuum flash evaporation descaling system - Google Patents
Coal gasification ash water vacuum flash evaporation descaling system Download PDFInfo
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- CN111646621A CN111646621A CN202010463742.3A CN202010463742A CN111646621A CN 111646621 A CN111646621 A CN 111646621A CN 202010463742 A CN202010463742 A CN 202010463742A CN 111646621 A CN111646621 A CN 111646621A
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- 238000002309 gasification Methods 0.000 title claims abstract description 37
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 19
- 239000010797 grey water Substances 0.000 claims abstract description 65
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000007791 liquid phase Substances 0.000 claims abstract description 8
- 239000012071 phase Substances 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 46
- 238000004062 sedimentation Methods 0.000 claims description 26
- 238000007701 flash-distillation Methods 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 abstract description 45
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 11
- 239000011575 calcium Substances 0.000 abstract description 11
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- 239000011777 magnesium Substances 0.000 abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 abstract description 11
- 229910052710 silicon Inorganic materials 0.000 abstract description 11
- 239000010703 silicon Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000002244 precipitate Substances 0.000 abstract description 4
- 238000005352 clarification Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 16
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- 239000003599 detergent Substances 0.000 description 11
- 239000003814 drug Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 description 6
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- 238000007599 discharging Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
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- 238000012986 modification Methods 0.000 description 4
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- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
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- 238000005086 pumping Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a coal gasification grey water vacuum flash-evaporation descaling system, wherein a gas-phase outlet of a vacuum flash evaporation tank is communicated with an inlet of a vacuum flash evaporation condenser through a pipeline, a liquid-phase outlet of the vacuum flash evaporation tank is communicated with an inlet of a mixed dosing tank through a pipeline, an outlet of the mixed dosing tank is communicated with an inlet of a settling tank through a pipeline, an outlet of a flocculating agent tank is communicated with an inlet of the mixed dosing tank through a pipeline, and an outlet of a descaling agent tank is communicated with an inlet of the mixed dosing tank through a pipeline. The effect is as follows: the coal gasification grey water is treated by the method, the grey water from the vacuum flash tank, the scale remover and the flocculating agent are uniformly mixed in the mixing and dosing tank, then the mixture is sent to a settling tank for clarification and settling, and fine ash and silicon, aluminum, calcium, magnesium and other plasma precipitates contained in the water are removed, so that the scaling of pipelines and equipment of a grey water treatment system can be slowed down, the operation period and the stability of equipment of the grey water treatment system are improved, and the investment of the grey water treatment system is reduced.
Description
Technical Field
The invention relates to the technical field of coal gasification grey water treatment, in particular to a coal gasification grey water vacuum flash-evaporation descaling system.
Background
At present, in the treatment of coal gasification ash water, a vacuum flash tank and a settling tank are often used for cooling, flocculating and settling fine ash in the ash water, the ash water from the vacuum flash tank is mixed with a flocculating agent by a pipeline mixer arranged in front of the settling tank, then the mixture enters the settling tank to settle the fine ash, the concentrated ash water at the bottom of the settling tank is discharged and then filtered, and the fine ash in the ash water is removed, so that the content of the fine ash in the ash water is reduced.
There are two major problems in operation: firstly, the contact time of the flocculating agent and the grey water is short, the pipeline mixer cannot well contact and mix the fine ash in the grey water and the flocculating agent, and the problem needs to be solved by prolonging the settling time, so that a settling tank needs to be arranged greatly, and the investment and the occupied area need to be increased; second, silicon, aluminum, calcium, magnesium, etc. contained in the grey water may cause ions in the piping and equipment structure to be not removed, and the scaling problem of coal gasification grey water has been a difficult point in coal gasification grey water treatment.
The connection between the vacuum flash tank and the settling tank has two forms: the first is that the vacuum flash tank is directly connected with a settling tank, the vacuum flash tank does not control the liquid level, and the settling tank is used as a liquid seal tank to ensure the vacuum degree; secondly, the vacuum flash tank controls the liquid level of the vacuum flash tank to ensure the vacuum degree of the vacuum flash tank, and the grey water is conveyed to a settling tank through a settling feed pump; in both of these forms of connection, the flocculant is a line mixer added before the settler.
The main problem of the first form is that the height difference between the vacuum flash tank and the settling tank must be greater than the vacuum degree of the vacuum flash tank, so that the installation height of the vacuum flash tank is very high, the vacuum degree of the vacuum flash tank is generally-0.05 MPaG to-0.07 MPaG, the liquid level of the settling tank is generally 10 meters, the installation height of the vacuum flash tank must be 15 meters to 17 meters, the height of a factory building must be very high to meet the installation requirement of the vacuum flash tank, and thus the investment is increased; the vacuum flash tank in the second form can be arranged on the floor of a factory building, so that the investment of the factory building is reduced, because the vacuum state in the vacuum flash tank is a vacuum state, the cavitation of the pump is often caused due to the fluctuation of the vacuum degree of the vacuum flash tank in the pumping process, so that the grey water treatment device cannot stably operate, in order to ensure the stable operation of the pump, the cavitation allowance of the pump must be increased, but at present, only a few factories capable of providing the pump are available all over the world.
The existing coal gasification ash water system has the problems of high investment, large occupied area, unstable operation and easy scaling of the existing coal gasification ash water flash evaporation and sedimentation, which seriously influences the safe and stable operation of the coal gasification ash water system, and a new method capable of solving the problems is urgently needed.
Disclosure of Invention
Therefore, the invention provides a coal gasification grey water vacuum flash-evaporation descaling system, which aims to solve the problems that in the prior art, a coal gasification grey water vacuum flash-evaporation system is unstable in operation, equipment and pipelines are easy to scale, a settling tank occupies a large area, the investment is high and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to the first aspect of the invention, the coal gasification grey water vacuum flash evaporation descaling system comprises a vacuum flash evaporation tank, a mixed chemical feeding tank, a settling tank, a vacuum flash evaporation condenser, a flocculating agent tank and a descaling agent tank, wherein a gas phase outlet of the vacuum flash evaporation tank is communicated with an inlet of the vacuum flash evaporation condenser through a pipeline, a liquid phase outlet of the vacuum flash evaporation tank is communicated with an inlet of the mixed chemical feeding tank through a pipeline, an outlet of the mixed chemical feeding tank is communicated with an inlet of the settling tank through a pipeline, an outlet of the flocculating agent tank is communicated with an inlet of the mixed chemical feeding tank through a pipeline, and an outlet of the descaling agent tank is communicated with an inlet of the mixed chemical feeding tank through a pipeline.
Further, still include and subside the feed pump, be provided with on the pipeline between mixed dosing groove and the subsider and subside the feed pump.
Further, the device also comprises a flocculating agent pump, and a flocculating agent pump is arranged on a pipeline between the flocculating agent tank and the mixed dosing tank.
And a scale remover pump is further included, and a pipeline between the scale remover groove and the mixed dosing groove is provided with the scale remover pump.
Further, the device also comprises a mixed medicine adding stirrer, and the mixed medicine adding groove is internally provided with the mixed medicine adding stirrer.
Further, still include the flocculating agent agitator, be provided with the flocculating agent agitator in the flocculating agent groove.
Further, the descaling device also comprises a descaling agent stirrer, and the descaling agent stirrer is arranged in the descaling agent groove.
Further, still include vacuum flash evaporation downcomer, vacuum flash evaporation downcomer's one end and the liquid phase exit linkage of vacuum flash tank, the other end of vacuum flash evaporation downcomer inserts to the bottom that mixes the medicine groove.
Further, the vacuum flash tank is provided with at least one grey water inlet, the mixing and dosing tank is provided with at least one flocculant inlet, and the mixing and dosing tank is provided with at least one detergent inlet.
Further, the vacuum flash condenser is connected with at least one vacuum flash tank, the number of the settling tanks is at least one, the number of the flocculating agent tanks is at least one, and the number of the descaling agent tanks is at least one.
The invention has the following advantages:
1. through the coal gasification grey water vacuum flash descaling system, the mixed chemical feeding tank can be used as a liquid seal tank of a vacuum flash tank, grey water in the vacuum flash tank automatically flows into the mixed chemical feeding tank by gravity, the mixed chemical feeding tank is installed on the ground and is generally 2 meters in height, and the vacuum degree of the vacuum flash tank is generally between-0.05 MPaG and-0.07 MPaG, so that the installation height of the vacuum flash tank can be installed between 7 meters and 9 meters, the factory investment is reduced, and the operation stability of the vacuum flash tank can be ensured;
2. the mixed chemical feeding tank can be provided with a plurality of chemical feeding inlets, so that different flocculating agents and descaling agents can be fed simultaneously, macromolecular flocculating agents such as polyacrylamide for promoting fine ash flocculation and sedimentation can be added, and descaling agents for regulating the pH value of grey water and removing silicon, aluminum, calcium, magnesium and other ions such as sodium carbonate, sodium hydroxide, calcium hydroxide and other descaling effects can be added simultaneously;
3. the mixing and dosing tank can be provided with a stirrer for fully stirring the grey water, the flocculating agent and the scale remover, the flocculating agent, the scale remover and the grey water are mixed more uniformly by using the stirrer, the contact reaction time is longer, the fine ash is easier to settle, the fine ash settling time is shortened, the volume of the settling tank can be reduced, and the investment and the occupied area are reduced;
4. the inlet of the sedimentation feeding pump is arranged at the bottom of the mixing dosing tank, the pressure of the mixing dosing tank is normal pressure when the mixing dosing tank operates normally, the requirement on the cavitation allowance of the pump is reduced, and a common chemical pump can meet the requirement;
5. in the process of flocculating and settling the fine ash, the settling tank settles the silicon, aluminum, calcium, magnesium and other ions in the form of precipitates, so that the settling tank plays a new role, the ash water passing through the settling tank not only realizes the high-efficiency removal of the fine ash, but also realizes the removal of silicon, aluminum, calcium, magnesium and other ions which are easy to scale, the scaling of coal gasification ash water treatment system equipment and pipelines is reduced, and the stable operation is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a block diagram of a coal gasification grey water vacuum flash scale removal system according to some embodiments of the present invention.
In the figure: 1. the system comprises a vacuum flash tank, 2, a vacuum flash evaporation liquid feeding pipe, 3, a mixed chemical feeding tank, 4, a mixed chemical feeding stirrer, 5, a sedimentation feeding pump, 6, a sedimentation tank, 7, a vacuum flash evaporation condenser, 8, a flocculating agent tank, 9, a flocculating agent stirrer, 10, a flocculating agent pump, 11, a scale remover tank, 12, a scale remover stirrer, 13 and a scale remover pump.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, in the present embodiment, a coal gasification grey water vacuum flash descaling system includes a vacuum flash tank 1, a mixed chemical feeding tank 3, a settling tank 6, a vacuum flash condenser 7, a flocculant tank 8, and a descaling agent tank 11, a gas phase outlet of the vacuum flash tank 1 is communicated with an inlet of the vacuum flash condenser 7 through a pipeline, a liquid phase outlet of the vacuum flash tank 1 is communicated with an inlet of the mixed chemical feeding tank 3 through a pipeline, an outlet of the mixed chemical feeding tank 3 is communicated with an inlet of the settling tank 6 through a pipeline, an outlet of the flocculant tank 8 is communicated with an inlet of the mixed chemical feeding tank 3 through a pipeline, and an outlet of the descaling agent tank 11 is communicated with an inlet of the mixed chemical feeding tank 3 through a pipeline.
The technical effect that this embodiment reaches does: the mixed chemical feeding tank 3 of the embodiment can be used as a liquid seal tank of the vacuum flash tank 1, grey water in the vacuum flash tank 1 automatically flows into the mixed chemical feeding tank 3 by gravity, the mixed chemical feeding tank 3 is installed on the ground and generally has the height of 2 meters, and the vacuum degree of the vacuum flash tank 1 is generally between-0.05 MPaG and-0.07 MPaG, so that the installation height of the vacuum flash tank 1 can be installed between 7 meters and 9 meters, the investment of a factory building is reduced, and the operation stability of the vacuum flash tank 1 can be ensured; the coal gasification grey water is treated by using a method, the grey water from the vacuum flash tank 1, a scale remover and a flocculating agent are uniformly mixed in a mixed chemical adding tank 3, then the mixture is sent to a settling tank 6 for clarification and settling, and fine ash and silicon, aluminum, calcium, magnesium and other plasma precipitates contained in the water are removed, so that the scaling of pipelines and equipment of a grey water treatment system can be slowed down, the operation period and stability of equipment of the grey water treatment system are improved, and the investment of the grey water treatment system is reduced.
Example 2
As shown in fig. 1, the coal gasification grey water vacuum flash evaporation descaling system in the present embodiment includes all the technical features of embodiment 1, in addition, a sedimentation feed pump 5 is further included, and a sedimentation feed pump 5 is disposed on a pipeline between the mixed chemical feeding tank 3 and the sedimentation tank 6; the device also comprises a flocculant pump 10, and the pipeline between the flocculant tank 8 and the mixed dosing tank 3 is provided with the flocculant pump 10; the device also comprises a scale remover pump 13, and the scale remover pump 13 is arranged on a pipeline between the scale remover groove 11 and the mixed chemical feeding groove 3.
The beneficial effects in this embodiment are: the inlet of the sedimentation feeding pump 5 of the embodiment is arranged at the bottom of the mixed dosing tank 3, the pressure is normal pressure when the mixed dosing tank 3 operates normally, the requirement on the cavitation allowance of the pump is reduced, and a common chemical pump can meet the requirement; the mixed medicine feeding tank 3 pumps materials into the settling tank 6 by arranging the settling feed pump 5; the flocculant pump 10 is arranged, so that the pumping of the flocculant tank 8 to the materials in the mixed dosing tank 3 is realized; by arranging the descaling agent pump 13, the pumping of the descaling agent tank 11 to the materials in the mixed dosing tank 3 is realized.
Example 3
As shown in fig. 1, the coal gasification grey water vacuum flash evaporation descaling system in the present embodiment includes all the technical features of embodiment 2, in addition, a mixing and chemical adding stirrer 4 is further included, and a mixing and chemical adding stirrer 4 is disposed in a mixing and chemical adding tank 3; the flocculant tank 8 is internally provided with a flocculant stirrer 9; the device also comprises a scale remover stirrer 12, wherein the scale remover stirrer 12 is arranged in the scale remover groove 11, and the mixed medicine adding stirrer 4, the flocculating agent stirrer 9 and the scale remover stirrer 12 are electrically driven by a motor to realize the rotation stirring.
In some alternative embodiments, a settling agitator is also provided in the settling tank 6, which settling agitator is realized by motor drive.
The beneficial effects in this embodiment are: the flocculant stirrer 9 is arranged, so that the materials in the flocculant tank 8 are stirred; the stirring of the materials in the descaling agent groove 11 is realized by arranging the descaling agent stirrer 12; the mixing and chemical adding tank 3 of the embodiment can be provided with a stirrer for fully stirring the grey water, the flocculating agent and the scale remover, the flocculating agent, the scale remover and the grey water are mixed more uniformly by utilizing the stirrer, the contact reaction time is longer, the fine ash is easier to settle, the fine ash settling time is shortened, the volume of the settling tank 6 can be reduced, and the investment and the occupied area are reduced.
Example 4
As shown in fig. 1, the coal gasification grey water vacuum flash descaling system in this embodiment includes all the technical features of embodiment 3, and in addition, includes a vacuum flash downcomer 2, one end of the vacuum flash downcomer 2 is connected to the liquid phase outlet of the vacuum flash tank 1, and the other end of the vacuum flash downcomer 2 is inserted into the bottom of the mixing and dosing tank 3.
The beneficial effects in this embodiment are: the other end through vacuum flash distillation downcomer 2 inserts to the bottom that mixes with medicine groove 3, has realized utilizing the liquid level that mixes with medicine groove 3 as the liquid seal to guarantee the vacuum of vacuum flash tank 1.
Example 5
As shown in fig. 1, the coal gasification grey water vacuum flash descaling system in this embodiment includes all the technical features of embodiment 4, in addition, the vacuum flash tank 1 is provided with at least one grey water inlet, the mixing chemical feeding tank 3 is provided with at least one flocculant inlet, and the mixing chemical feeding tank 3 is provided with at least one descaling agent inlet; the vacuum flash condenser 7 is connected with at least one vacuum flash tank 1, the number of the settling tanks 6 is at least one, the number of the flocculating agent tanks 8 is at least one, and the number of the descaling agent tanks 11 is at least one.
At least one of the above embodiments means "there may be one or more", and by the arrangement of the present embodiment, the variability of the system is enhanced.
The beneficial effects in this embodiment are: the mixed medicine adding tank 3 of this embodiment can set up a plurality of medicine inlets that add, can satisfy and add different flocculating agent and detergent simultaneously, can add macromolecular flocculating agent such as polyacrylamide that promotes fine ash flocculation and subsides, also can add the detergent that adjusts grey water pH value and descale effects such as sodium carbonate, sodium hydroxide, calcium hydroxide of removing silicon, aluminium, calcium, magnesium plasma simultaneously.
In the above embodiment, the liquid level of the vacuum flash tank 1 is not controlled, after grey water enters the vacuum flash tank 1, under the action of vacuum, a part of water turns into steam and flash evaporation gas such as carbon monoxide, carbon dioxide, hydrogen sulfide and the like which are resolved enter the vacuum flash condenser 7, the remaining liquid phase enters the mixed chemical feeding tank 3 through the vacuum flash evaporation liquid discharging pipe 2 by gravity, the vacuum flash evaporation liquid discharging pipe 2 is directly inserted into the bottom of the mixed chemical feeding tank 3, the liquid level of the mixed chemical feeding tank 3 is used as a liquid seal to ensure the vacuum degree of the vacuum flash tank 1, and according to the condition of a coal gasification device, one or two or more of the vacuum flash tanks 1 can share one mixed chemical feeding tank 3.
According to different properties of coal gasification ash water, the mixed chemical feeding tank 3 can be provided with one flocculant inlet or a plurality of flocculant inlets, and the number of the flocculants can be one or two or more; if a plurality of flocculants are adopted, the flocculating agent tanks 8 also need to be arranged respectively according to the types of the flocculants; according to different properties of the coal gasification grey water, the mixed chemical feeding tank 3 can be provided with one detergent inlet or a plurality of detergent inlets, the detergent can be one or two or more, and if a plurality of detergents are adopted, the detergent feeding tanks 11 need to be respectively arranged according to the types of the detergents. The mixed dosing tank 3 solves the problem that the sedimentation feeding pump 5 is easy to be cavitated due to vacuum degree fluctuation. The mixing and dosing tank 3 utilizes the stirrer to mix the flocculating agent, the descaling agent and the grey water more uniformly, the contact reaction time is longer, the fine ash is easier to settle, the fine ash settling time is shortened, and if the settling tank 6 with the same solvent is adopted, the grey water settling effect is better.
The grey water in the mixed dosing tank 3 is pressurized by a sedimentation feeding pump 5 and then is sent into a sedimentation tank 6, the grey water is settled in the sedimentation tank 6, and the fine ash after flocculation and sedimentation and the precipitated precipitates of silicon, aluminum, calcium, magnesium and the like are discharged from the bottom of the sedimentation tank 6.
The invention can be better understood by the following cases: three vacuum flash tanks 1 are arranged at the 10-meter elevation of a plant frame, vacuum flash liquid discharging pipes 2 respectively enter a mixed chemical adding tank 3, the mixed chemical adding tank 3 is arranged on the ground of one layer of the plant frame, a settling tank 6 is independently arranged at the 20-meter position outside the plant frame, and the support elevation of the settling tank 6 is basically flush with the ground elevation of the frame layer.
The gray water with the temperature of 133 ℃ and the pressure of 0.2MpaG from the low-pressure flash tank enters a vacuum flash tank 1 in two ways, the vacuum degree of the vacuum flash tank 1 is maintained at-0.05 MPaG by a vacuum flash condenser 7 and a vacuum pump, gases such as water vapor, carbon monoxide, carbon dioxide, hydrogen sulfide and the like with the temperature of about 81 ℃ and trace fine ash enter the vacuum flash condenser 7, water and fine ash with the temperature of about 81 ℃ enter a mixed chemical feeding tank 3 through a vacuum flash liquid discharging pipe 2, according to the property of the grey water, the flocculating agents are simultaneously added by adopting an anionic flocculating agent and a cationic flocculating agent, two flocculating agent tanks 8 are arranged, one is an anionic flocculating agent tank, the other is a cationic flocculating agent tank, the two flocculating agents are respectively added into the mixed chemical adding tank 3 through respective flocculating agent pumps 10, the adding amount of the flocculating agents is generally controlled to be about 50PPm according to the concentration of the flocculating agents in the grey water, and the adjustment is carried out according to the property and the sedimentation effect of the grey water; meanwhile, the sodium carbonate solution prepared in the detergent tank 11 is also added into the mixed dosing tank 3 through a detergent pump 13 (chemical pump), and is mixed in the mixed dosing tank 3 through a stirrer; the adding amount of the sodium carbonate can also be adjusted according to the content of silicon, aluminum, calcium, magnesium and the like in the grey water at the outlet of the settling tank 6, and the pH value is generally adjusted to be 7-9.
The sedimentation feed pump 5 sends the grey water mixed with the flocculating agent and the sodium carbonate solution into the sedimentation tank 6, the fine ash and the sediments of silicon, aluminum, calcium, magnesium and the like are separated in the sedimentation tank 6, the flow of the sedimentation feed pump 5 meets the flow required by the simultaneous operation of the three vacuum flash tanks 1, as the flocculating agent and the sodium carbonate are fully contacted, mixed and reacted in the mixing and dosing tank 3, partial fine ash begins to flocculate, flocculent sediments begin to appear in the mixing and dosing tank 3, the sedimentation speed of the grey water entering the sedimentation tank 6 is accelerated, and the grey water containing the fine ash and the sediments of silicon, aluminum, calcium, magnesium and the like is discharged from the bottom of the sedimentation tank.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
Claims (10)
1. The coal gasification grey water vacuum flash descaling system is characterized by comprising a vacuum flash tank (1), a mixed dosing tank (3), a settling tank (6), a vacuum flash condenser (7), a flocculant tank (8) and a descaling agent tank (11), wherein a gas phase outlet of the vacuum flash tank (1) is communicated with an inlet of the vacuum flash condenser (7) through a pipeline, a liquid phase outlet of the vacuum flash tank (1) is communicated with an inlet of the mixed dosing tank (3) through a pipeline, an outlet of the mixed dosing tank (3) is communicated with an inlet of the settling tank (6) through a pipeline, an outlet of the flocculant tank (8) is communicated with an inlet of the mixed dosing tank (3) through a pipeline, and an outlet of the descaling agent tank (11) is communicated with an inlet of the mixed dosing tank (3) through a pipeline.
2. The coal gasification grey water vacuum flash descaling system according to claim 1, further comprising a sedimentation feed pump (5), wherein the sedimentation feed pump (5) is arranged on a pipeline between the mixing and dosing tank (3) and the sedimentation tank (6).
3. The coal gasification grey water vacuum flash descaling system according to claim 2, further comprising a flocculant pump (10), wherein the flocculant pump (10) is arranged on a pipeline between the flocculant tank (8) and the mixed chemical feeding tank (3).
4. The coal gasification grey water vacuum flash descaling system according to claim 3, further comprising a descaling agent pump (13), wherein the descaling agent pump (13) is arranged on a pipeline between the descaling agent tank (11) and the mixed chemical feeding tank (3).
5. The coal gasification grey water vacuum flash distillation descaling system according to claim 1, further comprising a mixing and dosing stirrer (4), wherein the mixing and dosing stirrer (4) is arranged in the mixing and dosing tank (3).
6. The coal gasification grey water vacuum flash scale removal system of claim 5, further comprising a flocculant stirrer (9), wherein the flocculant stirrer (9) is disposed in the flocculant tank (8).
7. The coal gasification grey water vacuum flash descaling system according to claim 6, further comprising a descaling agent stirrer (12), wherein the descaling agent stirrer (12) is arranged in the descaling agent tank (11).
8. The coal gasification grey water vacuum flash descaling system according to claim 1, further comprising a vacuum flash downcomer (2), wherein one end of the vacuum flash downcomer (2) is connected with the liquid phase outlet of the vacuum flash tank (1), and the other end of the vacuum flash downcomer (2) is inserted into the bottom of the mixing and dosing tank (3).
9. The coal gasification grey water vacuum flash descaling system according to claim 1, wherein the vacuum flash tank (1) is provided with at least one grey water inlet, the mixing chemical feeding tank (3) is provided with at least one flocculant inlet, and the mixing chemical feeding tank (3) is provided with at least one descaling agent inlet.
10. The coal gasification grey water vacuum flash descaling system according to claim 9, wherein the vacuum flash condenser (7) is connected with at least one vacuum flash tank (1), the number of the settling tanks (6) is at least one, the number of the flocculant tanks (8) is at least one, and the number of the descaling agent tanks (11) is at least one.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110209407A1 (en) * | 2010-02-26 | 2011-09-01 | General Electric Company | Heat recovery in black water flash systems |
| CN106492494A (en) * | 2016-12-07 | 2017-03-15 | 马宏波 | A kind of improve heat recovery rate and reduce the flash system of waste gas discharge |
| CN106946394A (en) * | 2017-05-05 | 2017-07-14 | 北京清创晋华科技有限公司 | The coal gasified black water and grey water treatment system and method for a kind of high heat organic efficiency |
| CN206799344U (en) * | 2017-03-20 | 2017-12-26 | 鄂尔多斯市昊华国泰化工有限公司 | A kind of black water treatment system |
| CN109179847A (en) * | 2018-11-26 | 2019-01-11 | 华东理工大学 | The vacuum flashing processing system and method in a kind of coal gasification low pressure Heisui River |
| CN109485190A (en) * | 2017-09-11 | 2019-03-19 | 神华集团有限责任公司 | The processing method and gasification of coal and its system in the Heisui River that coal gasification generates |
-
2020
- 2020-05-27 CN CN202010463742.3A patent/CN111646621A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110209407A1 (en) * | 2010-02-26 | 2011-09-01 | General Electric Company | Heat recovery in black water flash systems |
| CN106492494A (en) * | 2016-12-07 | 2017-03-15 | 马宏波 | A kind of improve heat recovery rate and reduce the flash system of waste gas discharge |
| CN206799344U (en) * | 2017-03-20 | 2017-12-26 | 鄂尔多斯市昊华国泰化工有限公司 | A kind of black water treatment system |
| CN106946394A (en) * | 2017-05-05 | 2017-07-14 | 北京清创晋华科技有限公司 | The coal gasified black water and grey water treatment system and method for a kind of high heat organic efficiency |
| CN109485190A (en) * | 2017-09-11 | 2019-03-19 | 神华集团有限责任公司 | The processing method and gasification of coal and its system in the Heisui River that coal gasification generates |
| CN109179847A (en) * | 2018-11-26 | 2019-01-11 | 华东理工大学 | The vacuum flashing processing system and method in a kind of coal gasification low pressure Heisui River |
Non-Patent Citations (1)
| Title |
|---|
| 徐梅芳: "《小城镇给水厂设计与运行管理指南》", 31 January 2015, 天津大学出版社 * |
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