CN215288269U - Device for desulfurizing, decalcifying and solidifying heavy metal in fly ash washing liquid - Google Patents
Device for desulfurizing, decalcifying and solidifying heavy metal in fly ash washing liquid Download PDFInfo
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- CN215288269U CN215288269U CN202120360795.2U CN202120360795U CN215288269U CN 215288269 U CN215288269 U CN 215288269U CN 202120360795 U CN202120360795 U CN 202120360795U CN 215288269 U CN215288269 U CN 215288269U
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- washing liquid
- heavy metal
- fly ash
- desulfurization
- calcium
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Abstract
The utility model discloses a flying dust washing liquid desulfurization removes calcium and solidification heavy metal device, include: a fly ash washing liquid storage tank, a desulfurization and calcium fixation reactor, a filter, a desulfurizer bin and a heavy metal curing agent bin; wherein: the desulfurization calcium fixation reactor bears a desulfurizer and a curing agent and can purify the fly ash washing liquid; adopt the utility model discloses flying dust washing liquid desulfurization decalcification and solidification heavy metal device, calcium, sulphur and heavy metal are fixed in the sediment in the flying dust washing liquid, effectively avoid evaporating the jam that impurity such as calcium sulfate was equipped to evaporating salt among the crystallization process, and the pollution of heavy metal to evaporating industrial salt product.
Description
Technical Field
The utility model relates to a flying dust solidification technology field, concretely relates to flying dust washing liquid desulfurization removes calcium and solidification heavy metal device.
Background
Along with the continuous improvement of the living standard of people, domestic waste is more and more, and certain green processing needs to be carried out to the processing technology of domestic waste to make its harm to the environment reduce. The current treatment modes of domestic garbage comprise direct landfill, garbage incineration and the like, and in the garbage incineration mode, fly ash generated after incineration contains certain calcium and heavy metals, so that the fly ash has great harm to the environment and is listed in the national hazardous waste list.
In the prior art, the fly ash treatment is mainly carried out by the water washing-cement kiln, a large amount of calcium chloride, potassium chloride sodium salt, heavy metal and sulfate in the fly ash are dissolved in water in the water washing process, and the washed fly ash enters the cement kiln to produce cement clinker. The water washing liquid of fly ash is high-salt waste water which can not be directly discharged, and the industrial potassium sodium salt product is generally prepared by evaporative crystallization. As the fly ash contains a large amount of soluble heavy metals, sulfur, calcium, potassium, sodium and the like, the water washing liquid is a mixed salt solution of calcium chloride, potassium sodium chloride, heavy metal chloride and sulfate, the heavy metals need to be decalcified and removed before entering a salt steaming system, the traditional calcium and heavy metal removing agents comprise sodium carbonate, sodium sulfide and the like, and the cost for calcium and heavy metal removal is high. In addition, the influence of sulfate radicals on a salt evaporation system is not considered in the traditional process, and a large amount of calcium sulfate is generated in the evaporation process, so that the evaporation system is blocked.
SUMMERY OF THE UTILITY MODEL
For solving the problem among the prior art, the utility model provides a flying dust washing liquid desulfurization removes calcium and solidification heavy metal device, its mode through the solid calcium reactor combination solidification of heavy metal curing agent feed bin and desulfurizer feed bin and desulfurization reduces the content of sulphur, calcium and heavy metal in the flying dust washing liquid for the content of sulphur, calcium and heavy metal in the washing liquid obviously reduces, avoids the influence to evaporation salt manufacturing system and evaporating salt product.
According to one aspect of the invention, a device for removing sulfur, calcium and heavy metals by solidifying fly ash washing liquid comprises: flying ash washing liquid storage jar 1, solid calcium reactor 2, filter 3, desulfurizer feed bin 4, heavy metal curing agent feed bin 5 of desulfurization, wherein: the desulfurization calcium fixation reactor 2 carries a curing agent and purifies the fly ash water washing liquid; the fly ash washing liquid storage tank 1 is used for carrying and conveying fly ash washing liquid, and an outlet of the fly ash washing liquid storage tank 1 is communicated with an inlet of the desulfurization calcium fixation reactor 2; the outlet of the desulfurizer bin 4 is communicated with the inlet of the desulfurization calcium fixation reactor 2; the outlet of the heavy metal curing agent bin 5 is communicated with the inlet of the desulfurization calcium fixation reactor 2; the outlet of the desulfurization calcium fixation reactor 2 is connected with the inlet of the filter 3; the filter 3 filters the slurry, the filtrate of the filter 3 enters an evaporative crystallization system or a sewage treatment system, and the filtered concentrated phase and the filtered slag of the filter 3 return to the fly ash washing process section.
Further optionally, the desulfurizing agent bin 4 and the heavy metal curing agent bin 5 are provided with weight metering devices.
Further optionally, the desulfurizing agent is one or more selected from hydrotalcite, witherite, barium chloride, barium carbonate and sodium aluminate, and the heavy metal curing agent is one or more selected from sodium sulfide, micro-nano zero-valent iron, polyaluminium chloride, PAM and polyferric sulfate.
Further optionally, the filter 3 is selected from one of a precision filter, a horizontal screw centrifuge, a disk centrifuge, and a filter press.
The utility model has the advantages that:
adopt the utility model discloses a flying dust washing liquid desulfurization removes calcium and solidification heavy metal device is linked together the complex mode through solid calcium reactor of desulfurization and desulfurizer feed bin, heavy metal curing agent feed bin, has realized getting rid of compositions such as sulphur, calcium, heavy metal in the flying dust washing liquid, for the evaporation crystallization creates good condition, and the scavenging solution reaches emission standard after passing through the filter, can arrange outside to industrial sewage treatment system.
Drawings
Fig. 1 shows a schematic diagram of a device for removing sulfur, calcium and heavy metals from fly ash washing liquid.
Description of reference numerals: a fly ash washing liquid storage tank 1, a desulfurization calcium fixation reactor 2, a filter 3, a desulfurizer bin 4 and a heavy metal curing agent bin 5.
Detailed Description
The contents of the present invention will now be discussed with reference to several exemplary embodiments. It should be understood that these examples are discussed only to enable those of ordinary skill in the art to better understand and thus implement the teachings of the present invention, and are not intended to imply any limitations on the scope of the invention.
As used herein, the term "include" and its variants are to be read as open-ended terms meaning "including, but not limited to. The term "based on" is to be read as "based, at least in part, on". The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment". The term "another embodiment" is to be read as "at least one other embodiment".
Fig. 1 shows the structure of a device for removing sulfur, calcium and heavy metals from fly ash washing liquid, which comprises: a fly ash washing liquid storage tank 1, a desulfurization calcium fixation reactor 2, a filter 3, a desulfurizer bin 4 and a heavy metal curing agent bin 5.
The desulfurization calcium fixation reactor 2 bears a heavy metal curing agent and a desulfurizer and can cure sulfur, calcium and heavy metals in fly ash, and the heavy metal curing agent comprises one or more of sodium sulfide, micro-nano zero-valent iron, polyaluminium chloride, PAM and polyferric sulfate; the desulfurizer comprises one or more of hydrotalcite, witherite, barium chloride, barium carbonate and sodium aluminate.
The fly ash washing liquid storage tank 1 is used for carrying and conveying fly ash washing liquid, and an outlet of the fly ash washing liquid storage tank 1 is communicated with an inlet of the desulfurization calcium fixation reactor 2.
The outlet of the desulfurizer bin 4 is communicated with the inlet of the desulfurization and calcium fixation reactor 2; the desulfurizer bin 4 is provided with a weight metering device which can meter the weight of the desulfurizer input from the desulfurizer bin 4 to the desulfurization calcium fixation reactor 2.
The outlet of the heavy metal curing agent bin 5 is communicated with the inlet of the desulfurization calcium fixation reactor 2, the heavy metal curing agent is loaded in the heavy metal curing agent bin 5, a weight metering device is arranged on the heavy metal curing agent bin 5, and the weight of the desulfurizer input into the desulfurization calcium fixation reactor 2 from the heavy metal curing agent bin 5 can be metered. The weight metering devices of the heavy metal curing agent bin 5 and the desulfurizer bin 4 can accurately calculate the weight ratio of the heavy metal curing agent to the desulfurizer, and the effects of desulfurization and heavy metal curing are improved.
The outlet of the desulfurization and calcium fixation reactor 2 is connected with the inlet of the filter 3; the filter 3 filters the mixture discharged by the desulfurization calcium fixation reactor 2, the filtrate of the filter 3 enters an evaporation crystallization system or a sewage treatment system, and the filtered concentrated phase liquid returns to the fly ash washing process section, namely returns to the desulfurization calcium fixation reactor 2 for desulfurization calcium fixation to remove solids. The filter 3 is selected from one of a precision filter, a horizontal spiral centrifuge, a disk centrifuge and a filter press.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
It should be understood that the order of the steps in the embodiments and the disclosure of the present invention does not absolutely imply any order of execution, and the execution order of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Claims (4)
1. The utility model provides a fly ash washing liquid desulfurization removes calcium and solidification heavy metal device which characterized in that includes: flying dust washing liquid storage jar (1), solid calcium reactor of desulfurization (2), filter (3), desulfurizer feed bin (4), heavy metal curing agent feed bin (5), wherein:
the desulfurization calcium fixation reactor (2) bears a curing agent and purifies the fly ash washing liquid in the fly ash washing liquid storage tank (1);
the fly ash washing liquid storage tank (1) is used for carrying and conveying fly ash washing liquid, and an outlet of the fly ash washing liquid storage tank (1) is communicated with an inlet of the desulfurization and calcium fixation reactor (2);
the outlet of the desulfurizer bin (4) is communicated with the inlet of the desulfurization calcium fixation reactor (2);
the outlet of the heavy metal curing agent bin (5) is communicated with the inlet of the desulfurization calcium fixation reactor (2);
the outlet of the desulfurization calcium fixation reactor (2) is connected with the inlet of the filter (3); the filter (3) filters the slurry, filtrate of the filter (3) enters an evaporative crystallization system or a sewage treatment system, and a filtered concentrated phase and filtered slag of the filter (3) return to a fly ash washing process section.
2. The fly ash washing liquid desulfurization, decalcification and heavy metal solidification device according to claim 1, wherein the desulfurizer silo (4) and the heavy metal curing agent silo (5) are provided with weight metering devices.
3. The device for desulfurizing, decalcifying and solidifying heavy metals in fly ash washing liquid according to claim 1, wherein the desulfurizing agent in the desulfurizing agent bin (4) is selected from one of hydrotalcite, witherite, barium chloride, barium carbonate and sodium aluminate, and the heavy metal solidifying agent in the heavy metal solidifying agent bin (5) is selected from one of sodium sulfide, micro-nano zero-valent iron, polyaluminium chloride, PAM and polyferric sulfate.
4. The device for desulfurizing, decalcifying and solidifying heavy metals in fly ash washing liquid according to claim 1, wherein the filter (3) is selected from one of a precision filter, a horizontal spiral centrifuge, a disk centrifuge and a filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120360795.2U CN215288269U (en) | 2021-02-09 | 2021-02-09 | Device for desulfurizing, decalcifying and solidifying heavy metal in fly ash washing liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120360795.2U CN215288269U (en) | 2021-02-09 | 2021-02-09 | Device for desulfurizing, decalcifying and solidifying heavy metal in fly ash washing liquid |
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| CN215288269U true CN215288269U (en) | 2021-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199377A (en) * | 2023-02-23 | 2023-06-02 | 浙江大学 | Incineration fly ash resource utilization method for quality control of washing waste salt |
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2021
- 2021-02-09 CN CN202120360795.2U patent/CN215288269U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199377A (en) * | 2023-02-23 | 2023-06-02 | 浙江大学 | Incineration fly ash resource utilization method for quality control of washing waste salt |
| CN116199377B (en) * | 2023-02-23 | 2023-12-08 | 浙江大学 | Incineration fly ash resource utilization method for quality control of washing waste salt |
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