CN111940464A - Spray type fly ash washing system - Google Patents
Spray type fly ash washing system Download PDFInfo
- Publication number
- CN111940464A CN111940464A CN202010818950.0A CN202010818950A CN111940464A CN 111940464 A CN111940464 A CN 111940464A CN 202010818950 A CN202010818950 A CN 202010818950A CN 111940464 A CN111940464 A CN 111940464A
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- China
- Prior art keywords
- fly ash
- spray
- conveying
- washing
- waste water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
Abstract
The invention discloses a spray type fly ash washing system, which comprises a fly ash wetting system, a fly ash conveying system and a waste water collecting system which are sequentially connected, wherein a spray system is arranged above the fly ash conveying system and is used for spraying fly ash on the fly ash conveying system; the fly ash wetting system is a stirring tank, a water filling port is arranged in the stirring tank, and the mixing ratio of fly ash and water in the stirring tank is 0.5-1.5; the fly ash conveying system comprises a feeder and a conveying belt, the feeder is connected with the fly ash wetting system, the feeder evenly lays the fly ash on the conveying belt, and the output end of the conveying belt is connected with the wastewater collecting system. The efficient washing of the fly ash is realized, and the waste water in the waste water collecting assembly is recycled, so that the water consumption of the washing waste water is less, and the resources are saved.
Description
Technical Field
The invention relates to the technical field of incineration fly ash treatment, in particular to a spray type fly ash washing system.
Background
The household garbage incineration fly ash contains a large amount of heavy metal substances, heavy metal migration can be caused by improper treatment, underground water, soil and air are polluted, and extremely serious harm is brought to human health by virtue of aquatic and terrestrial food chains; meanwhile, dioxin in the fly ash has high detention in the environment due to stable chemical structure, high fat solubility and difficult decomposition by natural microorganisms, and is a potential important environmental pollutant. Therefore, how to safely and effectively treat the dangerous waste with serious potential hazard and large yield becomes an environmental and social problem which needs to be solved urgently.
At present, the conventional fly ash treatment mode in China is to transport the fly ash to a safe landfill site for landfill treatment after cement solidification pretreatment, and as the cement solidification capacity is increased, a large amount of land resources are occupied, and the heavy metal stability is poor, the pollution risk of the landfill site is increased. In addition, the treatment and disposal costs of fly ash are extremely high, and the fly ash becomes an important bottleneck for popularization and application of incineration technology.
Due to the composition difference of garbage and the diversity of garbage incineration process in China, the composition and morphological structure of chloride salt in incineration fly ash are different, and the leaching toxicity difference of heavy metal is obvious. Many researches find that the water washing process can remove a large proportion of metal salts and total chlorine in the fly ash, so that the fly ash meets the subsequent resource requirement, and the development of the water washing pretreatment process with high efficiency, low cost and low water consumption has important significance for proper treatment, disposal and resource utilization of the fly ash.
A utility model (a fly ash washing system with low water consumption, publication No. CN201921181225.6) of Zhejiang peach blossom-source environmental protection technology GmbH comprises an original ash bin, a washing dechlorination module, a water storage tank, a liquid storage tank and a wet ash bin. The water washing dechlorination module comprises a material modification agent adding tank, a pulping tank and n water washing dehydration units. The dechlorination efficiency is improved by using the medicament, and the using amount of cleaning water is reduced.
An invention patent of Hangzhou xiu environmental protection technology limited (a garbage fly ash treatment process for improving chloride ion dissolution rate, publication No. CN109396163A), before the fly ash washing step, wet grinding is performed on fly ash, and slurry formed after wet grinding enters the fly ash washing step; and the cleaning wastewater is subjected to reverse osmosis treatment and recycling, so that the use amount of cleaning water is reduced, but the cost is higher.
At present, the disclosed methods for improving the washing efficiency of fly ash all use agents or recycle waste water efficiently to reduce the comprehensive water consumption. The existing method for improving the washing efficiency can increase the treatment cost of wastewater or increase the system operation cost (for example, the advanced treatment link of the washing wastewater is added so as to facilitate the recycling of the wastewater).
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the spray type fly ash washing system comprises a fly ash wetting system, a fly ash conveying system and a wastewater collecting system which are sequentially connected, wherein a spray system is arranged above the fly ash conveying system and is used for spraying the fly ash on the fly ash conveying system; the fly ash wetting system is a stirring tank, a water filling port is arranged in the stirring tank, and the mixing ratio of fly ash and water in the stirring tank is 0.5-1.5; the fly ash conveying system comprises a feeder and a conveying belt, the feeder is connected with the fly ash wetting system, the feeder evenly lays the fly ash on the conveying belt, and the output end of the conveying belt is connected with the wastewater collecting system.
Preferably, the waste water collecting system comprises a fly ash collecting component and a waste water collecting component, wherein the waste water collecting component is connected with a water filling port of the fly ash moistening system, and can recycle waste water into the fly ash moistening system for secondary utilization.
Preferably, the fly ash conveying system further comprises a support bracket, and the conveying belt is arranged on the support bracket; the bearing bracket comprises a bearing panel and a support frame, the bearing panel is arranged on the support frame, the vertical section of the bearing panel is a V-shaped structure with the middle part low and the two sides high, the height of the input end of the support frame is larger than that of the output end of the support frame, the bearing panel is an inclined plane, and the slope of the inclined plane is 1/50-1/10. The input and the output of support frame all are equipped with waste water collection system.
The spraying type fly ash washing method is applied to the spraying type fly ash washing system, and the thickness of the fly ash conveyed on the conveying belt by the feeding machine is 3cm-10 cm. And the ratio of the mass of spraying water per minute on the inclined plane per square meter of the bearing panel and the mass of fly ash conveyed per minute on the bearing panel by the spraying system is 1:1-5:1, and the spraying speed of the spraying system is correspondingly adjusted according to the thickness of the fly ash on the bearing panel and the conveying speed of the conveying belt.
By adopting the technical scheme, the invention realizes the continuous washing operation of the fly ash generated by burning the domestic garbage, the fly ash is uniformly dispersed by the fly ash conveying system and then is contacted with the washing water by the fly ash spraying system, thereby realizing the high-efficiency washing of the fly ash, and the washing water consumption is less and the resource is saved because the waste water in the waste water collecting component is recycled.
Drawings
FIG. 1 is a flow chart of the operation of the spray type fly ash washing system provided by the invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
As shown in the attached figure 1, the invention provides a spray type fly ash washing system, which comprises a fly ash wetting system, a fly ash conveying system and a waste water collecting system which are connected in sequence, wherein a spray system is arranged above the fly ash conveying system and is used for spraying fly ash on the fly ash conveying system; the fly ash wetting system is a stirring tank, a water filling port is arranged in the stirring tank, and the mixing ratio of fly ash and water in the stirring tank is 0.5-1.5; the fly ash conveying system comprises a feeder and a conveying belt, the feeder is connected with the fly ash wetting system, the feeder evenly lays the fly ash on the conveying belt, and the output end of the conveying belt is connected with the wastewater collecting system.
In this embodiment, the waste water collection system includes a fly ash collection component and a waste water collection component, and the waste water collection component is connected with the filler of the fly ash wetting system, and can recycle waste water into the fly ash wetting system for secondary utilization.
In this embodiment, the fly ash conveying system further comprises a support bracket, and the conveying belt is arranged on the support bracket; the bearing bracket comprises a bearing panel and a support frame, the bearing panel is arranged on the support frame, the vertical section of the bearing panel is a V-shaped structure with the middle part low and the two sides high, the height of the input end of the support frame is larger than that of the output end of the support frame, the bearing panel is an inclined plane, and the slope of the inclined plane is 1/50-1/10. The input and the output of support frame all are equipped with waste water collection system.
The spraying type fly ash washing system has the specific operation process that fly ash to be treated enters a stirring tank, the stirring tank is opened to add water, the fly ash to be treated and the water are mixed with each other, and the stirring time is 3-10 min. The wet fly ash is uniformly spread on the conveying belt through the feeding machine, the thickness of the fly ash is 3-10cm, the fly ash on the conveying belt is sprayed by the spraying system along with the advance of the conveying belt, the ratio of the mass of spraying water per minute of the spraying system on the inclined plane of each square meter of the bearing panel to the mass of the fly ash conveyed per minute of the bearing panel is 1:1-5:1, and the spraying speed of the spraying system is correspondingly adjusted according to the thickness of the fly ash on the bearing panel and the conveying speed of the conveying belt. And the sprayed fly ash enters a fly ash collecting system, the waste water enters a waste water collecting system, and the waste water in the waste water collecting system flows back to the stirring tank for reuse.
As those skilled in the art will appreciate, the present invention may be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to those embodiments but various changes and modifications can be made by one skilled in the art within the spirit and scope of the present invention as hereinafter claimed.
Claims (7)
1. A spray type fly ash washing system is characterized by comprising a fly ash wetting system, a fly ash conveying system and a waste water collecting system which are sequentially connected, wherein a spray system is arranged above the fly ash conveying system and is used for spraying fly ash on the fly ash conveying system;
the fly ash wetting system is a stirring tank, a water filling port is arranged in the stirring tank, and the mixing ratio of fly ash and water in the stirring tank is 0.5-1.5;
the fly ash conveying system comprises a feeder and a conveying belt, the feeder is connected with the fly ash wetting system, the feeder evenly lays the fly ash on the conveying belt, and the output end of the conveying belt is connected with the wastewater collecting system.
2. The spray-type fly ash water washing system of claim 1, wherein the waste water collection system comprises a fly ash collection assembly and a waste water collection assembly, the waste water collection assembly being connected to a water charging port of the fly ash moistening system.
3. The spray-type fly ash washing system of claim 1, wherein the fly ash conveying system further comprises a support bracket, and the conveyor belt is arranged on the support bracket;
the bearing bracket comprises a bearing panel and a support frame, wherein the bearing panel is arranged on the support frame, and the vertical section of the bearing panel is a V-shaped structure with a middle part and two high sides.
4. The spray-type fly ash washing system of claim 3, wherein the height of the input end of the support frame is greater than the height of the output end, so that the support panel is a slope having a slope of 1/50-1/10.
5. The spray-type fly ash washing system of claim 1, wherein the wastewater collection system is provided at both the input and output ends of the support frame.
6. A spray type fly ash washing method is applied to the spray type fly ash washing system of any one of claims 1 to 5, and is characterized in that the thickness of fly ash conveyed on the conveying belt by the feeding machine is 3cm-10 cm.
7. The spray-type fly ash washing method according to claim 1, wherein the ratio of the mass of spray water per minute on each square meter of slope of the bearing panel by the spray system to the mass of fly ash transported per minute on the bearing panel is 1:1-5: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010818950.0A CN111940464A (en) | 2020-08-14 | 2020-08-14 | Spray type fly ash washing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010818950.0A CN111940464A (en) | 2020-08-14 | 2020-08-14 | Spray type fly ash washing system |
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| Publication Number | Publication Date |
|---|---|
| CN111940464A true CN111940464A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010818950.0A Pending CN111940464A (en) | 2020-08-14 | 2020-08-14 | Spray type fly ash washing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112775146A (en) * | 2020-12-22 | 2021-05-11 | 江山市虎鼎环保科技有限公司 | Efficient water-saving and energy-saving treatment process for washing fly ash generated by burning household garbage |
-
2020
- 2020-08-14 CN CN202010818950.0A patent/CN111940464A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112775146A (en) * | 2020-12-22 | 2021-05-11 | 江山市虎鼎环保科技有限公司 | Efficient water-saving and energy-saving treatment process for washing fly ash generated by burning household garbage |
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