CN214289946U - Washing and desalting device for waste incineration fly ash - Google Patents
Washing and desalting device for waste incineration fly ash Download PDFInfo
- Publication number
- CN214289946U CN214289946U CN202022160179.0U CN202022160179U CN214289946U CN 214289946 U CN214289946 U CN 214289946U CN 202022160179 U CN202022160179 U CN 202022160179U CN 214289946 U CN214289946 U CN 214289946U
- Authority
- CN
- China
- Prior art keywords
- stage
- water
- cyclone separator
- washing tank
- washing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a msw incineration flying dust washing desalination device, include: a fly ash conveyor; the secondary washing system comprises a primary washing tank (1), a primary cyclone separator (2), a secondary washing tank (3) and a secondary cyclone separator (4) which are connected in sequence; a vacuum belt filter (5); a feed inlet of the drying unit (6) is communicated with a discharge outlet of the vacuum belt filter (5), and a water outlet of the drying unit (6) is communicated with a water inlet of the secondary washing tank (3); the water inlet of the concentrated water pretreatment system (7) is communicated with the water outlet of the first-stage cyclone separator (2); and an evaporative crystallization system (8). The utility model discloses can carry out washing preliminary treatment to burning flying dust simply, effectively to reduce burning flying dust's chlorine content.
Description
Technical Field
The utility model discloses be applied to flying dust and administer technical field, concretely relates to msw incineration flying dust washing desalination device.
Background
Due to the remarkable garbage reduction, harmless and recycling effects of the garbage incineration treatment technology, the garbage incineration power generation mode is gradually developed into a main means for household garbage treatment. The explosion development of the waste incineration power generation industry leads to the rapid increase of the production amount of incineration fly ash. The safety and environmental protection treatment of the waste incineration fly ash as a hazardous waste becomes a key factor for the healthy development of the waste incineration power generation industry.
The cement kiln co-treatment is an important mode for harmless and resource utilization of the existing waste incineration fly ash at home and abroad. As the fly ash contains too high harmful component chloride ions, the capability of the cement kiln for cooperatively treating the fly ash is restricted. If the fly ash is directly used as the raw material for firing the cement clinker, the chloride ions of the cement clinker are possibly out of standard due to the influence of the chloride ions. Therefore, in order to fully utilize the ability of the cement kiln to co-process fly ash, the fly ash needs to be pretreated to remove most of the chloride ions.
At present, the process of waste incineration fly ash pretreatment is generally a two/three-stage countercurrent rinsing process and the like. On one hand, the process needs to consume a large amount of water as a medium; on the other hand, the process is complex, the equipment is various, the system investment is large, and the operation and maintenance cost is high.
Therefore, how to design a simple and effective washing and desalting device for the fly ash from the waste incineration to carry out washing pretreatment on the fly ash so as to reduce the chlorine content of the fly ash from the incineration has great significance.
Disclosure of Invention
To the deficiency that exists among the prior art, the utility model provides a msw incineration flying dust washing desalination device. The utility model provides a msw incineration flying dust washing desalination device can carry out washing preliminary treatment to the flying dust of burning simply, effectively to reduce the chlorine content of flying dust of burning. The utility model provides a waste incineration flying dust washing demineralizer has reduced the complexity of incineration flying dust pretreatment process, has reduced the system investment to system's operation and maintenance cost have been reduced.
In an aspect of the present invention, there is provided a waste incineration fly ash washing and desalting device, comprising:
the fly ash conveying machine is a closed screw conveyer or a scraper conveyer;
the secondary washing system comprises a first-stage washing tank, a first-stage cyclone separator, a second-stage washing tank and a second-stage cyclone separator which are sequentially connected; the top parts of the first-stage washing tank and the second-stage washing tank are provided with a feed inlet and a water inlet;
the vacuum belt filter is used for dehydration treatment; the feed inlet of the vacuum belt filter is communicated with the discharge outlet of the second-stage cyclone separator, and the water outlet of the vacuum belt filter is communicated with the water inlet of the second-stage washing tank;
a feed inlet of the drying unit is communicated with a discharge outlet of the vacuum belt filter, and a water outlet of the drying unit is communicated with a water inlet of the second-stage washing tank;
the water inlet of the concentrated water pretreatment system is communicated with the water outlet of the first-stage cyclone separator; and
and a condensate water outlet of the evaporative crystallization system is communicated with a water inlet of the first-stage water washing tank, and a water inlet of the evaporative crystallization system is communicated with a water outlet of the concentrated water pretreatment system.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention further comprises: the feed inlet of the salt storage bin is communicated with the discharge outlet of the evaporative crystallization system;
the feed inlet of the filter cake storage bin is communicated with the discharge outlet of the drying unit;
the booster pump is used for boosting the slurry in the first-stage washing tank and conveying the slurry to the first-stage cyclone separator; or the booster pump is used for boosting the slurry in the second-stage water washing tank and conveying the slurry to the second-stage cyclone separator.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention, wherein the first-stage washing tank and the second-stage washing tank all comprise: the stirring device comprises a cylindrical barrel and a stirring device positioned in the cylindrical barrel.
The stirring power of the stirring device of the first-stage water washing tank is 0.6-2.0 kW, and the rotating speed is 200-300 rpm;
the washing time of the first-stage washing tank is 20-90 min;
the stirring power of the stirring device of the second-stage water washing tank is 0.4-1.5 kW, and the rotating speed is 30-200 rpm;
the washing time of the second-stage washing tank is 30-60 min;
the bottoms of the first-stage water washing tank and the second-stage water washing tank are provided with a pulp outlet and a flow metering device.
In some embodiments of the present invention, in the waste incineration fly ash water washing desalination device of the present invention, the first stage cyclone separator is a straight-flow cyclone separator or an internal circulation cyclone separator;
the second-stage cyclone separator is a straight-flow cyclone separator or an internal circulation type cyclone separator.
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, the aperture of the filter cloth of the vacuum belt filter is 10 μm to 15 μm, and the filter cloth is polypropylene fiber or polyester fiber;
the vacuum degree of the vacuum belt filter is 0.05-0.06 Mpa, and the filtering area is 5-10m2The speed of the filter belt is 0.5-5 m/min.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention further comprises a vacuum belt filter, wherein the vacuum belt filter is disposed in the waste incineration fly ash washing desalination device.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the discharge port of the first stage cyclone separator is communicated with the feed port of the second stage washing tank;
the feed inlet of the second-stage cyclone separator is communicated with the water outlet of the second-stage washing tank;
and the water outlet of the second-stage cyclone separator is communicated with the water inlet of the first-stage washing tank.
In some embodiments of the present invention, in the waste incineration fly ash water washing desalination device of the present invention, the fly ash conveyor is used for conveying fly ash and water to the secondary water washing system;
wherein the volume ratio of the fly ash to the water is (1:3) - (1: 10).
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the top of the first stage cyclone separator and the top of the second stage cyclone separator are both provided with an online flow monitoring device, and the online flow monitoring device is communicated with a central control room;
when the flow online monitoring device displays that the salinity of the effluent of the first-stage cyclone separator and/or the effluent of the second-stage cyclone separator is 20-30%, the central control room enables the water outlet of the first-stage cyclone separator and/or the water outlet of the second-stage cyclone separator to be communicated with the water inlet of the concentrated water pretreatment system;
when the flow online monitoring device displays that the salinity of the effluent of the first-stage cyclone separator and/or the effluent of the second-stage cyclone separator is less than 20%, the central control room enables the water outlet of the first-stage cyclone separator and/or the water outlet of the second-stage cyclone separator to be communicated with the water inlet of the first-stage washing tank.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the height-diameter ratio of the water outlet of the first stage cyclone separator and the height-diameter ratio of the second stage cyclone separator are (3:1) - (10: 1).
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the separation efficiency of the first stage cyclone separator is 60-80%;
the separation efficiency of the second-stage cyclone separator is 50-60%.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the concentrated water pretreatment system comprises: flocculation systems and centrifugation systems;
the flocculating agent adopted by the flocculation system is an organic flocculating agent and/or an inorganic flocculating agent;
the centrifuge system comprises a horizontal decanter centrifuge;
the rotating speed of the horizontal screw centrifuge is 2500-3000 rpm, and the differential rotating speed is 15-25 rpm.
In some embodiments of the present invention, in the waste incineration fly ash water washing desalination device of the present invention, the organic flocculant is selected from PAM and/or PAC;
the inorganic flocculant is FeCl3。
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the evaporative crystallization system is selected from one or more of a multiple-effect evaporation system, a mechanical vapor recompression system or an immersion combustion system.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the evaporative crystallization system is configured to transport salt substances to the salt storage bin, including: KCl, NaCl, NaNO3Or Na2SO4。
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, a discharge port of the drying unit is provided with a bag-type dust collector; the drying unit adopts an electric heating mode.
In some embodiments of the present invention, the waste incineration fly ash washing and desalting device of the present invention further comprises a buffer bin and a plunger pump;
and the discharge hole of the second-stage cyclone separator is communicated with the feed inlet of the vacuum belt filter through the buffer bin and the plunger pump which are sequentially connected.
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, the water content of the filter cake obtained after the treatment of the vacuum belt filter is less than or equal to 20%, and the chlorine content is less than or equal to 1%;
the filter cake then enters the drying unit to further reduce the water content of the filter cake.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention further comprises a drying unit, wherein the drying unit can adopt natural air drying and mechanical drying.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the natural air drying condition adopted by the drying unit can be: the temperature is 25-35 ℃, the air humidity is 45-50%, the air drying time is 24-48 h, and the water content of the air-dried filter cake is 9-15%;
the drying unit can be mechanically dried by adopting a heating dryer, wherein the air inlet temperature is 150-200 ℃, and the air outlet temperature is 85 ℃; the heat source of the drying unit can adopt electric heating or steam heating; the discharge port of the drying unit can be provided with a bag-type dust collector.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the drain valve can be adopted to the mode of getting rid of the steam condensate in the drying unit, and the steam condensate can be collected to the cooling water tank as the reuse water of the second-stage washing system.
One or more technical implementation schemes, at least, have following technological effect or advantage:
(1) the utility model provides a waste incineration flying dust washing desalination device, include: the fly ash conveying machine is a closed screw conveyer or a scraper conveyer; the secondary washing system comprises a first-stage washing tank, a first-stage cyclone separator, a second-stage washing tank and a second-stage cyclone separator which are sequentially connected; the top parts of the first-stage washing tank and the second-stage washing tank are provided with a feed inlet and a water inlet; the vacuum belt filter is used for dehydration treatment; the feed inlet of the vacuum belt filter is communicated with the discharge outlet of the second-stage cyclone separator, and the water outlet of the vacuum belt filter is communicated with the water inlet of the second-stage washing tank; a feed inlet of the drying unit is communicated with a discharge outlet of the vacuum belt filter, and a water outlet of the drying unit is communicated with a water inlet of the second-stage washing tank; the water inlet of the concentrated water pretreatment system is communicated with the water outlet of the first-stage cyclone separator; and a condensate outlet of the evaporative crystallization system is communicated with a water inlet of the first-stage washing tank, and a water inlet of the evaporative crystallization system is communicated with a water outlet of the concentrated water pretreatment system. The utility model provides a waste incineration flying dust washing demineralizer can effectively reduce the chlorine content in the domestic waste incineration flying dust, makes the flying dust reach the requirement that cement kiln coprocessing or high temperature melting were handled, realizes the resourceization.
(2) The utility model provides a waste incineration flying ash washing desalination device for the resource utilization of incineration flying ash creates the condition. The utility model mixes the fly ash and water according to a certain proportion, then pressurizes the slurry in the washing tank by the booster pump and conveys the slurry to the cyclone separator for centrifugal separation; returning the overflow water at the upper part of the cyclone separator to the upper-stage water washing tank, and conveying the discharged concentrated liquid at the discharge port at the lower part to a vacuum belt filter for dehydration treatment; the drainage that handles through vacuum belt filter can be used to circulation washing flying dust after collecting, and the concentrate through vacuum belt filter adopts the further dehydration of stoving unit to satisfy the feeding requirement of cement kiln, the utility model provides a msw incineration flying dust washing demineralizer energy consumption is low, the water consumption is little, efficient, equipment is simple.
(3) The utility model provides a msw incineration flying dust washing desalination device can carry out washing preliminary treatment to the flying dust of burning simply, effectively to reduce the chlorine content of flying dust of burning. The utility model provides a waste incineration flying dust washing demineralizer has reduced the complexity of incineration flying dust pretreatment process, has reduced the system investment to system's operation and maintenance cost have been reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be described below. It is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 shows a schematic diagram of a waste incineration fly ash water washing desalination device according to some embodiments of the present invention.
The elements represented by the various reference numbers in the figures are, in order:
1-first stage water washing tank; 2-first stage cyclone separator; 3-a second-stage water washing tank; 4-second stage cyclone separator; 5, a vacuum belt filter; 6, a drying unit; 7-concentrated water pretreatment system; 8-evaporative crystallization system; 9-a filter cake storage bin; 10-salt storage bin.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent from the description. It will be understood by those skilled in the art that the present embodiments and examples are illustrative of the present invention, and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.
The embodiment of the utility model provides a technical scheme is for solving above-mentioned technical problem, and the general thinking is as follows:
in an aspect of the present invention, there is provided a waste incineration fly ash washing and desalting device, comprising:
the fly ash conveying machine is a closed screw conveyer or a scraper conveyer;
the secondary washing system comprises a primary washing tank 1, a primary cyclone separator 2, a secondary washing tank 3 and a secondary cyclone separator 4 which are connected in sequence; the top parts of the first-stage washing tank 1 and the second-stage washing tank 3 are both provided with a feed inlet and a water inlet;
the vacuum belt filter 5 is used for dehydration treatment; the feed inlet of the vacuum belt filter 5 is communicated with the discharge outlet of the second-stage cyclone separator 4, and the water outlet of the vacuum belt filter 5 is communicated with the water inlet of the second-stage washing tank 3;
a feed inlet of the drying unit 6 is communicated with a discharge outlet of the vacuum belt filter 5, and a water outlet of the drying unit 6 is communicated with a water inlet of the second-stage washing tank 3;
a water inlet of the concentrated water pretreatment system 7 is communicated with a water outlet of the first-stage cyclone separator 2; and
and the condensate water outlet of the evaporative crystallization system 8 is communicated with the water inlet of the first-stage water washing tank 1, and the water inlet of the evaporative crystallization system 8 is communicated with the water outlet of the concentrated water pretreatment system 7.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention further comprises: a feed inlet of the salt storage bin 10 is communicated with a discharge outlet of the evaporative crystallization system 8;
a filter cake storage bin 9, wherein a feed inlet of the filter cake storage bin 9 is communicated with a discharge outlet of the drying unit 6;
the booster pump is used for boosting the slurry in the first-stage washing tank 1 and conveying the slurry to the first-stage cyclone separator 2; alternatively, the booster pump is used for boosting the slurry in the second-stage water washing tank 3 and conveying the slurry to the second-stage cyclone 4.
In some embodiments of the present invention, in the waste incineration fly ash water washing desalination device of the present invention, the first-stage water washing tank 1 and the second-stage water washing tank 3 all include: the stirring device comprises a cylindrical barrel and a stirring device positioned in the cylindrical barrel.
The stirring power of the stirring device of the first-stage water washing tank 1 is 0.6-2.0 kW, and the rotating speed is 200-300 rpm;
the water washing time of the first-stage water washing tank 1 is 20-90 min;
the stirring power of the stirring device of the second-stage water washing tank 3 is 0.4-1.5 kW, and the rotating speed is 30-200 rpm;
the washing time of the first-stage washing tank 1 is 30-60 min;
the bottoms of the first-stage water washing tank 1 and the second-stage water washing tank 3 are provided with a pulp outlet and a flow metering device.
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, the first stage cyclone separator 2 is a straight-flow cyclone separator or an internal circulation cyclone separator;
the second-stage cyclone separator 4 is a straight-flow cyclone separator or an internal circulation type cyclone separator.
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, the aperture of the filter cloth of the vacuum belt filter 5 is 10 μm to 15 μm, and the filter cloth is polypropylene fiber or polyester fiber;
the vacuum degree of the vacuum belt filter 5 is 0.05-0.06 Mpa, and the filtering area is 5-10m2The speed of the filter belt is 0.5-5 m/min.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention, wherein the water outlet of the vacuum belt filter 5 comprises washing water and/or filtered water.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the discharge port of the first stage cyclone 2 is communicated with the feed port of the second stage washing tank 3;
the feed inlet of the second-stage cyclone separator 4 is communicated with the water outlet of the second-stage washing tank 3;
and the water outlet of the second-stage cyclone separator 4 is communicated with the water inlet of the first-stage washing tank 1.
In some embodiments of the present invention, in the waste incineration fly ash water washing desalination device of the present invention, the fly ash conveyor is used for conveying fly ash and water to the secondary water washing system;
wherein the volume ratio of the fly ash to the water is (1:3) - (1: 10).
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the top of the first stage cyclone separator 2 and the top of the second stage cyclone separator 4 are both provided with an online flow monitoring device, and the online flow monitoring device is communicated with a central control room;
when the flow online monitoring device displays that the salinity of the effluent of the first-stage cyclone separator 2 and/or the effluent of the second-stage cyclone separator 4 is 20-30%, the central control room enables the water outlet of the first-stage cyclone separator 2 and/or the water outlet of the second-stage cyclone separator 4 to be communicated with the water inlet of the concentrated water pretreatment system 7;
when the flow online monitoring device displays that the salinity of the effluent of the first-stage cyclone separator 2 and/or the effluent of the second-stage cyclone separator 4 is less than 20%, the central control room enables the water outlet of the first-stage cyclone separator 2 and/or the water outlet of the second-stage cyclone separator 4 to be communicated with the water inlet of the first-stage washing tank 1.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the height-diameter ratio of the water outlet of the first stage cyclone 2 and the second stage cyclone 4 is (3:1) - (10: 1).
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device of the present invention, the separation efficiency of the first stage cyclone separator 2 is 60-80%;
the separation efficiency of the second-stage cyclone separator 4 is 50-60%.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the concentrated water pretreatment system 7 comprises: flocculation systems and centrifugation systems;
the flocculating agent adopted by the flocculation system is an organic flocculating agent and/or an inorganic flocculating agent;
the centrifuge system comprises a horizontal decanter centrifuge;
the rotating speed of the horizontal screw centrifuge is 2500-3000 rpm, and the differential rotating speed is 15-25 rpm.
In some embodiments of the present invention, in the waste incineration fly ash water washing desalination device of the present invention, the organic flocculant is selected from PAM and/or PAC;
the inorganic flocculant is FeCl3。
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the evaporative crystallization system 8 is selected from one or more of a multiple-effect evaporation system, a mechanical vapor recompression system or an immersion combustion system.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the evaporative crystallization system 8 includes: KCl, NaCl, NaNO3Or Na2SO4。
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, a bag-type dust remover is disposed at a discharge port of the drying unit 6; the drying unit 6 adopts an electric heating mode.
In some embodiments of the present invention, the waste incineration fly ash washing and desalting device of the present invention further comprises a buffer bin and a plunger pump;
and the discharge hole of the second-stage cyclone separator 4 is communicated with the feed inlet of the vacuum belt filter 5 through the buffer bin and the plunger pump which are sequentially connected.
In some embodiments of the present invention, in the waste incineration fly ash washing and desalting device of the present invention, the water content of the filter cake obtained after the treatment of the vacuum belt filter 5 is less than or equal to 20%, and the chlorine content is less than or equal to 1%;
the filter cake then enters the drying unit 6 to further reduce the water content of the filter cake.
In some embodiments of the present invention, the waste incineration fly ash washing desalination device of the present invention, the drying unit 6 can adopt two modes of natural air drying and mechanical drying.
In some embodiments of the present invention, in the waste incineration fly ash washing desalination device, the natural air drying condition adopted by the drying unit 6 can be: the temperature is 25-35 ℃, the air humidity is 45-50%, the air drying time is 24-48 h, and the water content of the air-dried filter cake is 9-15%;
the drying unit 6 can be mechanically dried by adopting a heating dryer, wherein the air inlet temperature is 150-200 ℃, and the air outlet temperature is 85 ℃; the heat source of the drying unit 6 can adopt electric heating or steam heating; the discharge port of the drying unit 6 can be provided with a bag-type dust collector.
Fig. 1 shows a schematic diagram of a waste incineration fly ash water washing desalination device according to some embodiments of the present invention. As shown in fig. 1, a waste incineration fly ash washing desalination apparatus according to some embodiments of the present invention includes: the fly ash conveying machine is a closed screw conveyer or a scraper conveyer; the secondary washing system comprises a primary washing tank 1, a primary cyclone separator 2, a secondary washing tank 3 and a secondary cyclone separator 4 which are connected in sequence; the top parts of the first-stage washing tank 1 and the second-stage washing tank 3 are both provided with a feed inlet and a water inlet; the vacuum belt filter 5 is used for dehydration treatment; the feed inlet of the vacuum belt filter 5 is communicated with the discharge outlet of the second-stage cyclone separator 4, and the water outlet of the vacuum belt filter 5 is communicated with the water inlet of the second-stage washing tank 3; a feed inlet of the drying unit 6 is communicated with a discharge outlet of the vacuum belt filter 5, and a water outlet of the drying unit 6 is communicated with a water inlet of the second-stage washing tank 3; a water inlet of the concentrated water pretreatment system 7 is communicated with a water outlet of the first-stage cyclone separator 2; and the condensate outlet of the evaporative crystallization system 8 is communicated with the water inlet of the first-stage water washing tank 1, and the water inlet of the evaporative crystallization system 8 is communicated with the water outlet of the concentrated water pretreatment system 7.
With reference to fig. 1, in some embodiments of the present invention, the fly ash conveyor is a closed screw conveyor or a scraper conveyor.
In some embodiments of the present invention, the first-stage water washing tank 1 and the second-stage water washing tank 3 both include: cylindrical barrel and stirring device positioned inside cylindrical barrel
In some embodiments of the present invention, the fly ash conveyor is used to convey fly ash and water to the secondary water wash system; wherein the volume ratio of the fly ash to the water is (1:3) - (1: 10).
In some embodiments of the present invention, the fly ash and water enter the first-stage water washing tank 1 according to the volume ratio of (1:3) to (1:10), the retention time is 80min, and the stirring speed of the stirrer is 300 rpm; then, the slurry enters a first-stage cyclone separator 2 after being accelerated by a booster pump; when the overflowing liquid in the first-stage cyclone separator 2 passes through the flow online monitoring device and shows that the salinity is 20-30%, the overflowing liquid flows into a concentrated water pretreatment system 7 to be treated; when the salinity of the overflow liquid in the first-stage cyclone separator 2 is less than 20 percent through the flow online monitoring device, the overflow liquid continuously flows into the first-stage washing tank 1 as reuse water; then, the wet solid separated in the first-stage cyclone separator 2 and the overflow liquid enter a second-stage water washing tank 3 together, the retention time is set to be 50min, and the stirring speed of a stirrer is 200 rpm; then, the slurry enters a second-stage cyclone separator 4 after being accelerated by a booster pump, and overflow liquid in the second-stage cyclone separator 4 flows back to a second-stage water washing tank 3; then the wet solid and the overflow liquid separated in the second-stage cyclone separator 4 enter a vacuum belt filter 5; the filtrate passing through the vacuum belt filter 5 is returned to the first-stage water washing tank 1 as water washing liquid, and the filter cake passing through the vacuum belt filter 5 is conveyed to the drying unit 6.
The utility model discloses an in some embodiments, stoving unit 6 adopts the mode of electrical heating to heat inlet air temperature to 200 ℃, sets up the sack cleaner at stoving unit 6's discharge gate simultaneously.
In some embodiments of the present invention, the drainage valve can be adopted to remove the steam condensate in the drying unit 6, and the steam condensate can be collected to the cooling water tank as the reuse water of the second-stage washing system flows back to the second-stage washing tank 3.
In some embodiments of the utility model, the water content of the filter cake obtained after the treatment of the drying unit 6 is less than or equal to 10 percent, and the chlorine content is less than 1.0 percent; can be transported to a cement company for cooperative treatment.
In some embodiments of the present invention, the concentrated water pretreatment system 7 includes: flocculation systems and centrifugation systems; the overflowing concentrated water of the first-stage cyclone separator 2 enters a concentrated water pretreatment system 7, is pumped into an evaporative crystallization system 8 after being flocculated, filtered and homogenized, and the heat source of the evaporative crystallization system 8 adopts an electric heating mode; clear liquid passing through the evaporative crystallization system 8 flows back to the first-stage water washing tank 1 to be used as cleaning liquid, and crystallized salt passing through the evaporative crystallization system 8 enters the salt storage bin 10 to be used for next refining treatment.
In some embodiments of the present invention, the evaporative crystallization system 8 may be MVR, flash evaporation.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A waste incineration fly ash washing desalination device is characterized by comprising:
the fly ash conveying machine is a closed screw conveyer or a scraper conveyer;
the secondary washing system comprises a first-stage washing tank, a first-stage cyclone separator, a second-stage washing tank and a second-stage cyclone separator which are sequentially connected; the top parts of the first-stage washing tank and the second-stage washing tank are provided with a feed inlet and a water inlet;
the vacuum belt filter is used for dehydration treatment; the feed inlet of the vacuum belt filter is communicated with the discharge outlet of the second-stage cyclone separator, and the water outlet of the vacuum belt filter is communicated with the water inlet of the second-stage washing tank;
a feed inlet of the drying unit is communicated with a discharge outlet of the vacuum belt filter, and a water outlet of the drying unit is communicated with a water inlet of the second-stage washing tank;
the water inlet of the concentrated water pretreatment system is communicated with the water outlet of the first-stage cyclone separator; and
and a condensate water outlet of the evaporative crystallization system is communicated with a water inlet of the first-stage water washing tank, and a water inlet of the evaporative crystallization system is communicated with a water outlet of the concentrated water pretreatment system.
2. The waste incineration fly ash water washing desalination device of claim 1, further comprising:
the feed inlet of the salt storage bin is communicated with the discharge outlet of the evaporative crystallization system;
the feed inlet of the filter cake storage bin is communicated with the discharge outlet of the drying unit;
the booster pump is used for boosting the slurry in the first-stage washing tank and conveying the slurry to the first-stage cyclone separator; or the booster pump is used for boosting the slurry in the second-stage water washing tank and conveying the slurry to the second-stage cyclone separator.
3. The waste incineration fly ash water washing desalination device of claim 1 or 2,
the first-stage water washing tank and the second-stage water washing tank both comprise: the stirring device is positioned in the cylindrical barrel;
the stirring power of the stirring device of the first-stage water washing tank is 0.6-2.0 kW, and the rotating speed is 200-300 rpm;
the washing time of the first-stage washing tank is 20-90 min;
the stirring power of the stirring device of the second-stage water washing tank is 0.4-1.5 kW, and the rotating speed is 30-200 rpm;
the washing time of the second-stage washing tank is 30-60 min;
the bottoms of the first-stage water washing tank and the second-stage water washing tank are provided with a pulp outlet and a flow metering device.
4. The waste incineration fly ash washing and desalting device as claimed in claim 1 or 2, wherein a discharge port of the first-stage cyclone separator is communicated with a feed port of the second-stage washing tank;
the feed inlet of the second-stage cyclone separator is communicated with the water outlet of the second-stage washing tank;
and the water outlet of the second-stage cyclone separator is communicated with the water inlet of the first-stage washing tank.
5. The waste incineration fly ash water washing desalination device of claim 1 or 2, wherein the fly ash conveyor is used for conveying fly ash and water to the secondary water washing system;
wherein the volume ratio of the fly ash to the water is 1: 3-1: 10.
6. The waste incineration fly ash washing and desalting device as claimed in claim 1 or 2, wherein the top of each of the first stage cyclone separator and the second stage cyclone separator is provided with an online flow monitoring device, and the online flow monitoring devices are communicated with a central control room;
when the flow online monitoring device displays that the salinity of the effluent of the first-stage cyclone separator and/or the effluent of the second-stage cyclone separator is 20-30%, the central control room enables the water outlet of the first-stage cyclone separator and/or the water outlet of the second-stage cyclone separator to be communicated with the water inlet of the concentrated water pretreatment system;
when the flow online monitoring device displays that the salinity of the effluent of the first-stage cyclone separator and/or the effluent of the second-stage cyclone separator is less than 20%, the central control room enables the water outlet of the first-stage cyclone separator and/or the water outlet of the second-stage cyclone separator to be communicated with the water inlet of the first-stage washing tank.
7. The waste incineration fly ash washing and desalting device as claimed in claim 1 or 2, wherein the height-diameter ratio of the water outlet of the first stage cyclone separator to the height-diameter ratio of the second stage cyclone separator are both 3: 1-10: 1.
8. The msw incineration fly ash water washing desalination device of claim 1 or 2, wherein the concentrated water pretreatment system comprises: flocculation systems and centrifugation systems;
the flocculating agent adopted by the flocculation system is an organic flocculating agent and/or an inorganic flocculating agent;
the centrifuge system comprises a horizontal decanter centrifuge; the rotating speed of the horizontal screw centrifuge is 2500-3000 rpm, and the differential rotating speed is 15-25 rpm.
9. The waste incineration fly ash water washing desalination device of claim 1 or 2, wherein the evaporative crystallization system is selected from one or more than two of a multi-effect evaporation system, a mechanical vapor recompression system, or a submerged combustion system.
10. The waste incineration fly ash washing and desalting device according to claim 1 or 2, wherein a bag-type dust remover is arranged at a discharge port of the drying unit;
the drying unit adopts an electric heating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022160179.0U CN214289946U (en) | 2020-09-27 | 2020-09-27 | Washing and desalting device for waste incineration fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022160179.0U CN214289946U (en) | 2020-09-27 | 2020-09-27 | Washing and desalting device for waste incineration fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214289946U true CN214289946U (en) | 2021-09-28 |
Family
ID=77827774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022160179.0U Active CN214289946U (en) | 2020-09-27 | 2020-09-27 | Washing and desalting device for waste incineration fly ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214289946U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850196A (en) * | 2022-05-23 | 2022-08-05 | 安徽海螺环保集团有限公司 | Fly ash water desalination system |
-
2020
- 2020-09-27 CN CN202022160179.0U patent/CN214289946U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114850196A (en) * | 2022-05-23 | 2022-08-05 | 安徽海螺环保集团有限公司 | Fly ash water desalination system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106746124A (en) | Garbage flying ash water-washing pre-treatment and cement kiln collaboration disposal of resources system | |
| JP6639330B2 (en) | Dehydration system and dehydration method | |
| CN209139465U (en) | Flying dust treating system and flying dust processing unit | |
| CN112077128A (en) | Water washing treatment system and method for fly ash | |
| CN104176883B (en) | Paper waste recycling treatment system and corresponding technique | |
| CN204122439U (en) | For the city garbage burning flying ash resource pretreatment system of cement producting material | |
| CN212597897U (en) | Flying dust washing processing system | |
| CN210586329U (en) | Fly ash washing system with low water consumption | |
| CN104445680B (en) | A kind of waste disposal plant | |
| CN214289946U (en) | Washing and desalting device for waste incineration fly ash | |
| CN109290345A (en) | Flying dust treating system and flying dust processing unit | |
| CN116283094A (en) | Cooperative treatment method and system for waste incineration fly ash and silicon-rich waste | |
| JP2009165964A (en) | Method and system for dehydrating sludge | |
| CN110240380A (en) | A kind of petrochemical industry sludge treating system | |
| CN206872603U (en) | Chemical sewage treatment equipment | |
| CN203700858U (en) | System with zero emission of papermaking pulp dreg and sludge | |
| CN108689538A (en) | The processing unit and its processing method of desulfurization wastewater | |
| CN206108988U (en) | Utilize water treatment facilities of power plant's waste heat | |
| CN105254100B (en) | A kind of saline sewage processing system and method | |
| CN204400734U (en) | Micro-magnetic adds reprecipitation water body purification integral system | |
| CN210595743U (en) | Petrochemical sludge treatment system | |
| CN106365278A (en) | Water body heavy metal removal technique | |
| CN110255848A (en) | Sludge dewatering system | |
| CN206580717U (en) | Sludge microwave plasma drying particles system | |
| CN213388291U (en) | Sludge thickener for sewage plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |