CN109179834A - A kind of dangerous waste landfill percolate treatment process and its dedicated unit - Google Patents

A kind of dangerous waste landfill percolate treatment process and its dedicated unit Download PDF

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Publication number
CN109179834A
CN109179834A CN201811087847.2A CN201811087847A CN109179834A CN 109179834 A CN109179834 A CN 109179834A CN 201811087847 A CN201811087847 A CN 201811087847A CN 109179834 A CN109179834 A CN 109179834A
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CN
China
Prior art keywords
dangerous waste
waste landfill
dosing
intake pump
percolate
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.)
Pending
Application number
CN201811087847.2A
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Chinese (zh)
Inventor
方小琴
夏俊方
韩粒
肖龙博
陆魁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI JINGYU ENVIRONMENTAL ENGINEERING Co Ltd
Original Assignee
SHANGHAI JINGYU ENVIRONMENTAL ENGINEERING Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by SHANGHAI JINGYU ENVIRONMENTAL ENGINEERING Co Ltd filed Critical SHANGHAI JINGYU ENVIRONMENTAL ENGINEERING Co Ltd
Priority to CN201811087847.2A priority Critical patent/CN109179834A/en
Publication of CN109179834A publication Critical patent/CN109179834A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06Contaminated groundwater or leachate

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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)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

The invention discloses a kind of dangerous waste landfill percolate treatment process and its dedicated units, dangerous waste landfill percolate is pre-processed, is aoxidized, the treatment processes such as evaporative crystallization, the purpose of realization goes removing heavy metals, water demineralization, high concentration salt resource utilization, condensed water to meet reuse requirement, water resource has not only been saved, more inexpensive dangerous waste landfill percolate processing is realized.

Description

A kind of dangerous waste landfill percolate treatment process and its dedicated unit
Technical field
The present invention relates to industrial waste water treatments, are specifically exactly that one kind is related to the processing of dangerous waste landfill percolate Technique and its dedicated unit.
Background technique
Hazardous waste is mainly derived from the poisonous and harmful substance of industrial enterprise, and carrying out the landfill stage into landfill yard can generate Percolate, this percolate are a kind of toxic high-concentration waste waters of complicated component, and variation water quality is big, contains a large amount of salts, nothing Machine pollutant (such as heavy metal contaminants, non-heavy metal pollutant), ammonia nitrogen, volatile organic solvent are harmful if dealing with improperly Ingredient easily causes secondary pollution to surface water, underground water and soil.Therefore, the low cost of dangerous waste landfill percolate how is realized Processing is the important link for solving dangerous waste landfill yard pollution environment.
Since leachate quality is complicated and changeable, salt content is high, there is no very perfect treatment process in industry.Currently, with Mainly there are physical-chemical process, reverse osmosis treatment method, land law, evaporation knot in the more mature method of processing dangerous waste landfill percolate Crystallization etc. or the above method combine.But landfill yard investment is big, operational and administrative expenses is high, and landfill yard is caused to be unable to reach expected processing Target and environmentally friendly purpose, it is therefore desirable to develop dangerous waste landfill percolate processing technique with low investment, that effect is good.
About the processing method of dangerous waste landfill percolate, Chinese patent CN105130075A discloses a kind of processing side Method, using alkali tune, flocculation sedimentation, mud-water separation, ammonia-nitrogen desorption, evaporation and concentration and solidification landfill step.In this method, ammonia nitrogen is blown De- process energy consumption is big, and processing cost is higher, and the by-product ammonium sulfate that ammonia-nitrogen desorption technique generates, and disposition is asked Topic does not solve;Secondly, lacking organic matter removal step in front-end process, cause to contain largely not in the mother liquor of evaporative crystallization Labile organic matter, needs subsequent cure to handle, and increases processing difficulty and cost.Meanwhile by the method treated steam For lime set of feeling cold because containing a large amount of volatile organic solvents, not up to discharge water standard limitation does not also embody method of disposal.
Chinese patent CN206173158U discloses a kind of hazardous waste landfill garbage percolation liquid treating system, including Preprocessing subsystem and evaporation and concentration subsystem.But the method that the patent illustrates is similar with above-mentioned patent, precipitable in pretreatment The pollutants such as heavy metal, but lack organic matter removal technique, exist such as etch evaporator, fouling in subsequent evaporation process Problem.Equally, though evaporation condensed water water quality is stablized, there are low-boiling-point organic compounds, and water quality is not up to standard, and there is still a need for lifes for subsequent technique The processing of change method.Last concentrate solution is intended to carry out burning disposal, increases atmosphere pollution risk after solid phase separates.
Summary of the invention
The present invention is directed to above-mentioned technological deficiency existing in the prior art, provides a kind of dangerous waste landfill percolate processing work Skill and its dedicated unit, process provides a kind of inexpensive, innoxious, minimizing processing methods, can both realize landfill yard The removal of complicated ingredient in percolate, such as high concentration salt, heavy metal contaminants, organic pollutant, ammonia nitrogen, while can also obtain To recycling condensing water up to standard, the pollution to environment is reduced, water resource has been saved, has reduced dangerous waste landfill percolate and be processed into This, has significant economic benefit and social benefit.
Technical solution
To achieve the goals above, the present invention provides a kind of dangerous waste landfill percolate treatment process, which is characterized in that it Including the following steps:
(1) dangerous waste landfill percolate is subjected to pH value and adjusts pretreatment, remove the heavy metal contaminants in percolate And non-metal contaminants, the water outlet after obtaining sludge and softening;
(2) water outlet in step (1) is subjected to oxidation reaction, removes inorganic and insoluble organic pollutant and ammonia in water removal Nitrogen;
(3) water outlet in step (2) is evaporated crystallization, dope is dried to obtain crystal salt, recycling condensing water.
Further, by the way that lime or piece alkali and sodium carbonate regulating solution pH value is added in step (1) preprocessing process Between 9~12, heavy metal contaminants and non-metal contaminants are removed, obtained sludge is handled, the water outlet after softening Carry out the oxidation reaction processing of next step.
Further, in the step (2) in oxidation reaction process by adding oxidant, by step (1) water outlet in have Machine object, ammonia nitrogen removal guarantee the water quality reaching standard of subsequent evaporation crystallization process.
A kind of dedicated unit of dangerous waste landfill percolate treatment process, it is characterised in that: it includes precipitation reaction pond, oxygen Change reactor, evaporation and crystallization system, crystal salt recyclable device, sludge treating system, percolate former pond, intermediate water tank, condensation Water tank, dosing A unit, dosing unit B, the first intake pump, the second intake pump, third intake pump, the 4th intake pump, the first dosing Pump and the second dosing pump;
The percolate former pond is connect with precipitation reaction pond, and the first intake pump is housed on connecting line, and the precipitating is anti- The sludge output end of Ying Chi is connect with sludge treating system;The dosing A unit is connect with precipitation reaction pond, is filled on connecting line There is the first dosing pump;Precipitation reaction pond output end is connect with oxidation reactor, and the second intake pump is housed on connecting line;Institute It states dosing unit B to connect with oxidation reactor, the second dosing pump is housed on connecting line;The output end of the oxidation reactor with Intermediate water tank connects, and third intake pump is housed in connecting line;The output end of the intermediate water tank is connect with evaporation and crystallization system, 4th intake pump is housed on connecting line;The crystal salt output end of the evaporation and crystallization system is connect with crystal salt recyclable device, Condensed water output end connects condensation water tank.
Beneficial effect
A kind of dangerous waste landfill percolate treatment process provided by the invention and its dedicated unit, process provides one kind Inexpensive, innoxious, minimizing processing method, can both realize the removal of complicated ingredient in landfill percolate, such as high concentration Salt, heavy metal contaminants, organic pollutant, ammonia nitrogen etc., while recycling condensing water up to standard also can be obtained, reduce the dirt to environment Dye, has saved water resource, has reduced dangerous waste landfill percolate processing cost, has significant economic benefit and social benefit.
Detailed description of the invention
Attached drawing 1 is the process flow chart of the embodiment of the present invention.
Attached drawing 2 is the equipment of the embodiment of the present invention connection relationship diagram.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be further described.
Embodiment
As shown in Fig. 2, the dedicated unit of dangerous waste landfill percolate treatment process, it is characterised in that: it includes precipitating Reaction tank 1, oxidation reactor 2, evaporation and crystallization system 3, crystal salt recyclable device 4, sludge treating system 5, percolate former pond 6, intermediate water tank 7, condensation water tank 8, dosing A unit 9, dosing unit B 10, the first intake pump 11, the second intake pump 12, third into Water pump 13, the 4th intake pump 14, the first dosing pump 15, the second dosing pump 16;
The percolate former pond 6 is connect with precipitation reaction pond 1, and the first intake pump 11 is housed on connecting line;Precipitating is anti- The sludge output end in pond 1 is answered to connect with sludge treating system 5;Dosing A unit 9 is connect with precipitation reaction pond 1, is filled on connecting line There is the first dosing pump 15;1 output end of precipitation reaction pond is connect with oxidation reactor 2, and the second intake pump 12 is housed on connecting line; Dosing unit B 10 is connect with oxidation reactor 2, and the second dosing pump 16 is housed on connecting line;The output end of oxidation reactor 2 with Intermediate water tank 7 connects, and third intake pump 13 is housed in connecting line;The output end and evaporation and crystallization system 3 of intermediate water tank 7 connect It connects, the 4th intake pump 14 is housed on connecting line;The crystal salt output end and crystal salt recyclable device 4 of evaporation and crystallization system 3 connect It connects, condensed water output end connects condensation water tank 8.
Dangerous waste landfill percolate treatment process is carried out using above-mentioned special equipment, it including the following steps:
The first step, dangerous waste landfill percolate are placed in precipitation reaction pond 1 by adjusting pH pretreatment, remove weight in percolate Metal pollutant and non-metal contaminants, the water outlet after obtaining sludge and softening;During this, white lime and sodium carbonate tune is added Water-saving pH value is to remove heavy metal contaminants and non-metal contaminants, obtained sludge is in Treatment of Sludge system between 9~12 It is handled in system, the water after softening, which enters, carries out oxidation reaction process in oxidation reactor.
Water outlet in the first step is entered and carries out oxidation reaction process in oxidation reactor 2 by second step, is gone inorganic in water removal And insoluble organic pollutant and ammonia nitrogen;During this, by adding appropriate such as sodium hypochlorite oxidant, step (1) is discharged Organic matter, ammonia nitrogen removal, guarantee to be evaporated the water quality reaching standard of crystallization process.
Water outlet in second step is entered evaporation and crystallization system 3 by third step, and dope is dried to obtain crystal salt, and condensed water returns With;Evaporation condensate is free of low-boiling-point organic compound, and water quality reaches the three-level mark in " integrated wastewater discharge standard " GB8978-1996 Quasi- emission limit requirement;It is up to standard to evaporate post mother liquor, obtains crystal salt after dope is dry, is not required to additional curing processing.
Structure depicted in this specification institute accompanying drawings of the embodiment of the present invention, ratio, size, quantity etc., only to cooperate specification Revealed content is not intended to limit the invention enforceable restriction item so that those skilled in the art understands and reads Part, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing Under the effect of present invention can be generated and the purpose that can reach, it should all still fall in disclosed technology contents and obtain and can contain In the range of lid.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre ", " clockwise ", " inverse time in this specification The term of needle " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness It is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.

Claims (4)

1. a kind of dangerous waste landfill percolate treatment process, which is characterized in that it including the following steps:
(1) dangerous waste landfill percolate is subjected to pH value and adjusts pretreatment, remove the heavy metal contaminants and non-in percolate Metal pollutant, the water outlet after obtaining sludge and softening;
(2) water outlet in step (1) is subjected to oxidation reaction, removes inorganic and insoluble organic pollutant and ammonia nitrogen in water removal;
(3) water outlet in step (2) is evaporated crystallization, dope is dried to obtain crystal salt, recycling condensing water.
2. a kind of dangerous waste landfill percolate treatment process as described in claim 1, it is characterised in that: the step (1) is pre- By lime or piece alkali being added and sodium carbonate regulating solution pH value is between 9~12 in treatment process, by heavy metal contaminants and Non-metal contaminants remove, and obtained sludge is handled, and the water outlet after softening carries out the oxidation reaction processing of next step.
3. a kind of dangerous waste landfill percolate treatment process as described in claim 1, it is characterised in that: in the step (2) By adding oxidant in oxidation reaction process, by organic matter, the ammonia nitrogen removal in step (1) water outlet, guarantee subsequent evaporation knot The water quality reaching standard of brilliant process.
4. a kind of dangerous waste landfill percolate treatment process described in any one of the claims 1~3 claim is special With device, it is characterised in that: it includes precipitation reaction pond (1), oxidation reactor (2), evaporation and crystallization system (3), crystal salt time Receiving apparatus (4), sludge treating system (5), percolate former pond (6), intermediate water tank (7), condensation water tank (8), dosing A unit (9), dosing unit B (10), the first intake pump (11), the second intake pump (12), third intake pump (13), the 4th intake pump (14), the first dosing pump (15) and the second dosing pump (16);
The percolate former pond (6) connect with precipitation reaction pond (1), and the first intake pump (11) are housed on connecting line, described The sludge output end in precipitation reaction pond (1) is connect with sludge treating system (5);The dosing A unit (9) and precipitation reaction pond (1) it connects, the first dosing pump (15) is housed on connecting line;Precipitation reaction pond (1) output end and oxidation reactor (2) are even It connects, the second intake pump (12) is housed on connecting line;The dosing unit B (10) connect with oxidation reactor (2), connecting line It is upper that second dosing pump (16) are housed;The output end of the oxidation reactor (2) is connect with intermediate water tank (7), is filled in connecting line There are third intake pump (13);The output end of the intermediate water tank (7) is connect with evaporation and crystallization system (3), is equipped on connecting line 4th intake pump (14);The crystal salt output end of the evaporation and crystallization system (3) is connect with crystal salt recyclable device (4), condensation Water output end connects condensation water tank (8).
CN201811087847.2A 2018-09-18 2018-09-18 A kind of dangerous waste landfill percolate treatment process and its dedicated unit Pending CN109179834A (en)

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CN201811087847.2A CN109179834A (en) 2018-09-18 2018-09-18 A kind of dangerous waste landfill percolate treatment process and its dedicated unit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111573985A (en) * 2020-05-27 2020-08-25 四川省工业环境监测研究院 Waste water treatment method for garbage penetrating fluid treatment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106315984A (en) * 2016-09-30 2017-01-11 江西东江环保技术有限公司 Treatment method of landfill leachate
CN107827291A (en) * 2017-09-26 2018-03-23 上海晶宇环境工程股份有限公司 Percolate reverse osmosis concentration liquor treating process and special equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106315984A (en) * 2016-09-30 2017-01-11 江西东江环保技术有限公司 Treatment method of landfill leachate
CN107827291A (en) * 2017-09-26 2018-03-23 上海晶宇环境工程股份有限公司 Percolate reverse osmosis concentration liquor treating process and special equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
全国勘察设计注册工程师环保专业管理委员会等: "注册环保工程师专业考试复习教材 第3分册 下", 中国环境科学出版社, pages: 134 - 300 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111573985A (en) * 2020-05-27 2020-08-25 四川省工业环境监测研究院 Waste water treatment method for garbage penetrating fluid treatment

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