CN108373249B - Resource utilization method and treatment system for high-chlorine iron-containing waste sludge - Google Patents
Resource utilization method and treatment system for high-chlorine iron-containing waste sludge Download PDFInfo
- Publication number
- CN108373249B CN108373249B CN201810237963.1A CN201810237963A CN108373249B CN 108373249 B CN108373249 B CN 108373249B CN 201810237963 A CN201810237963 A CN 201810237963A CN 108373249 B CN108373249 B CN 108373249B
- Authority
- CN
- China
- Prior art keywords
- iron
- solid
- separated
- filter press
- liquid
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
Abstract
The invention discloses a resource utilization method and a treatment system of high-chlorine iron-containing waste sludge. According to the characteristics of high iron content and high chloride ion content of the waste acid-washing sludge, the solid iron-containing material and the liquid sintering inhibition powdering agent are separated by the wet method and are respectively recycled, so that the treatment cost of the waste is saved, TFe and chloride ions in the waste are converted into valuable resources to be utilized, the process flow is short, the equipment is simple, no secondary waste is generated, and the real recycling utilization of the waste acid-washing sludge is realized.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a resource utilization method and a treatment system for high-chlorine iron-containing waste sludge.
Background
In order to clean the surface of steel or stainless steel, hydrochloric acid or mixed acid containing hydrochloric acid is used for pickling and derusting the steel or stainless steel, and pickling waste liquid is generated. The waste pickle liquor is treated by coagulating sedimentation. The sludge produced by coagulating sedimentation or the sludge cake produced by filter pressing is a high-chlorine iron-containing waste. Most of the current waste generation units are processed by fire.
The patent with the application number of 201110111921.1, namely a method for sludge reduction treatment of cold rolling and pickling wastewater in the steel industry, discloses a method for reducing the sludge yield and the water treatment cost per ton by completely and separately treating a water source and accurately adding a chemical agent into a unit.
The patent "method and apparatus for treating chlorine-containing waste" in the application No. 200680038611.8 discloses a method for separating chlorine-containing waste into liquid and solid by water washing and filtering. The solid is used as a cement raw material, the liquid is subjected to chemical reaction, flocculation precipitation, evaporation, crystallization and drying to obtain KCl, and the precipitated impurities are used as the cement raw material. The invention aims to remove the adverse effect of chlorine-containing wastes on cement quality or cement kiln system operation in cement production.
Patent No. 201410523633.0 entitled "method for producing cement using acid-washed sludge and cement produced using acid-washed sludge" invented a method for producing cement by adding acid-washed sludge to cement raw material and cement produced using acid-washed sludge. The invention aims to provide a resource utilization way for producing cement by using acid-washing sludge.
The patent 'acid washing iron oxide red desiliconization filter cake processing device and processing method' with the application number of 200810024330.9 invents a device for decomposing and processing acid washing iron oxide red desiliconization filter cake by heating, and iron concentrate powder and industrial hydrochloric acid can be obtained by the processing method adopted by the processing device.
The utilization of the acid-washing sludge by the prior treatment technology is to use the acid-washing sludge as a useless raw material to be added into the cement production in a small amount. Or the industrial hydrochloric acid is recycled by high-temperature decomposition on the basis of the original treatment process, the process is complex, and energy is consumed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a resource utilization method and a treatment system for high-chlorine iron-containing waste sludge, aiming at separating the waste by a wet method according to the self characteristics of the waste and performing valuable utilization according to different functions of a separator so as to realize real resource utilization of the waste.
In order to achieve the purpose, the invention adopts the technical scheme that:
a resource utilization method of high-chlorine iron-containing waste sludge is characterized in that solid iron-containing materials and liquid are separated from the high-chlorine iron-containing waste sludge through a wet method, and the liquid is sintered to inhibit a powdering agent for resource utilization.
Preferably, the solid iron-containing material is used as a sintering raw material for iron making or steel making.
The main process of the invention is as follows:
hazardous waste → pulping → separation → utilization.
Preferably, the method specifically comprises the following steps:
1) adding water and quicklime powder into the high-chlorine iron-containing waste acid-washed sludge to be mixed and pulped;
2) separating the slurry;
3) the separated solid and solution are stored separately for use.
The mass ratio of the waste acid-washing sludge in the step 1) to the water and the quicklime powder is 1: 5-50: 0.1 to 1.
In the step 1), the mixed reaction formula is as follows:
Ca(OH)2 + 2HCl→CaCl2 + 2H2O
Ca(OH)2 + FeCl2→CaCl2 + Fe(OH)2or
Ca(OH)2 + FeCl3→CaCl2 + Fe(OH)3
The pH value of the waste acid-washing sludge in the step 1) is 3-6, the mass percent of total iron is 35-55%, and the mass percent of chloride ions is 5-26%. The mixing and stirring time is preferably 10 to 30 minutes.
The pH value of the mixed liquid obtained after the mixing and pulping in the step 1) is 7-12.
And 2) performing filter pressing separation on the slurry by adopting a plate-and-frame filter press in the step 2), wherein the filter pressing pressure is 1.0-2.0 MPa.
The solid separated in the step 2) is an iron-containing material, the mass percent of total iron is 45-68%, and the mass percent of chloride ions is less than 1%. Directly transported by a vehicle and used as the raw material for iron making or steel making.
In the step 2)The separated solution is CaCl2The solution is used as a sintering inhibition powdering agent for spraying.
In the step 3), if CaCl remains in the solid2And (5) injecting water to prepare pulp for secondary separation when the solution is more.
The invention also provides a treatment system of the high-chlorine iron-containing waste sludge, which comprises a mixing tank for mixing and pulping, a first stirrer arranged in the mixing tank, a first filter press for filter-pressing and solid-liquid separation, a first liquid storage tank for storing liquid separated by the first filter press, a solid storage bin for storing solid separated by the first filter press and a first conveying pump for guiding the slurry in the mixing tank into the first filter press.
The treatment system also comprises a second filter press, a solid receiving vehicle for storing the solid separated by the second filter press, a second liquid storage tank for storing the liquid separated by the second filter press, and a stirring pool for adding water into the solid introduced into the solid storage bin, stirring and mixing, wherein the slurry in the stirring pool is introduced into the second filter press through a second conveying pump, and the liquid in the second liquid storage tank is introduced into the mixing tank through a third conveying pump.
The invention has the beneficial effects that: according to the characteristics of high iron content and high chloride ion content of the waste acid-washing sludge, the solid iron-containing material and the liquid sintering inhibition powdering agent are separated by the wet method and are respectively recycled, so that the treatment cost of the waste is saved, the total iron and chloride ions in the waste are converted into valuable resources to be utilized, the process flow is short, the equipment is simple, no secondary waste is generated, and the real recycling utilization of the waste acid-washing sludge is realized. On one hand, the external treatment cost of the waste is saved, and simultaneously the prepared CaCl2The solution is a sinter ore powdering inhibitor, can be used in a steel mill, and has good economic and social benefits.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a process flow diagram of the present invention.
Labeled as:
1. the solid filter press comprises a mixing tank, 2, a first stirrer, 3, a first filter press 4, a first liquid storage tank, 5, a solid storage bin, 6, a first conveying pump, 7, a second filter press, 8, a second liquid storage tank, 9, a solid receiving vehicle, 10, a stirring pool, 11, a second stirrer, 12, a second conveying pump, 13 and a third conveying pump.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
As shown in fig. 1, a treatment system of high-chlorine iron-containing waste sludge includes a mixing tank 1 for mixing and pulping, a first stirrer 2 disposed in the mixing tank 1, a first filter press 3 for filter-pressing and solid-liquid separation, a first liquid storage tank 4 for storing liquid separated by the first filter press 3, a solid storage bin 5 for storing solid separated by the first filter press 3, and a first transfer pump 6 for introducing slurry in the mixing tank 1 to the first filter press 3.
If CaCl remains in the solid2The treatment system also comprises a second filter press 7, a solid receiving vehicle 8 for storing the solid separated by the second filter press 7, a second liquid storage tank 9 for storing the liquid separated by the second filter press 7 and a stirring pool 10 for adding water to the solid introduced into the solid storage bin 5, stirring and mixing, wherein the slurry in the stirring pool 10 is introduced into the second filter press 7 through a second conveying pump 12, and the liquid in the second liquid storage tank 9 is introduced into the mixing tank 1 through a third conveying pump 13. The liquid generated by washing and filter pressing the solid is returned to be used as the water for pulping the dangerous waste acid-washed sludge; further, the separated liquid is recycled, resources are saved, equipment is simple, and the real resource utilization of the waste acid-washing sludge is realized. The pumping pressure is preferably 0.5MPa to 1.0 MPa.
The method is that the high-chlorine iron-containing waste sludge is separated into solid iron-containing materials and liquid by a wet method, and the liquid is sintered to inhibit the powdering agent for resource utilization. The solid iron-containing material is used as a sintering raw material for iron making or steel making. Not only saves the treatment cost of the waste, but also converts the total iron and chloride ions in the waste into valuable resources for utilization, has short process flow, does not generate secondary waste, and realizes the real resource utilization of the waste acid-washing sludge.
Preferably, the method specifically comprises the following steps:
1) adding water and quicklime powder into the high-chlorine iron-containing waste acid-washed sludge to be mixed and pulped; wherein the pH value of the waste acid-washing sludge is 3-6, the mass percent of total iron is 35-55%, and the mass percent of chloride ions is 5-26%; the waste acid-washing sludge, water and quicklime powder are mixed according to the mass ratio of 1 (5-50): (0.1-1), mixing and stirring for 10-30 minutes. The pH value of the mixed liquid after mixing and pulping is 7-12.
2) Separating the slurry into solid and liquid after the pressure of the plate-and-frame filter press; the filter pressing pressure is 1.0 MPa-2.0 MPa. The separated solid is an iron-containing material, the mass percent of total iron is 45-68%, and the mass percent of chloride ions is less than 1%.
3) The separated solid and solution are respectively stored for use; the solid is used as iron-making or steel-making raw material, and the liquid is CaCl2The solution is a sintering inhibiting powdering agent and is used directly.
If CaCl remains in the solid2And (4) injecting water into the system to prepare pulp for secondary separation when the solution is more.
The following is illustrated in detail by specific examples:
example 1
a. The method comprises the following steps of mixing waste acid-washed sludge with total iron content of 44.38% and chloride ion content of 10.69% by mass with water and quicklime powder according to a mass ratio of 1: 5: 0.1 mixing and stirring for 20 minutes to prepare pulp;
b. the slurry is separated by press filtration at 1.6 MPa by a plate-and-frame filter press. 66.10% of separated solid total iron and 0.81% of chloride ion by mass percent, and transporting the solid total iron to ironmaking through steamSintering plant, used as blast furnace iron-smelting raw material; the separated liquid is mainly a sintering powder inhibiting agent CaCl2The solution with the concentration of 18.86mg/L is directly transported to the sintered ore for iron making to be sprayed.
Example 2
a. Mixing waste acid-washed sludge with 40.42% of total iron and 21.36% of chloride ions by mass with water and quicklime powder according to the mass ratio of 1: 20: 0.4 mixing and stirring for 25 minutes to prepare pulp;
b. the slurry is separated by press filtration at 1.2 MPa by a plate-and-frame filter press. The separated liquid is mainly a sintering powder inhibiting agent CaCl2The solution with the chloride ion concentration of 46.87mg/l is directly transported to the sintered ore for iron making to be sprayed;
c. the mass percent of total iron and chloride ions in the separated solid is 51.35 percent and 2.48 percent, and the solid is washed by water for the second time and is filtered by pressure, the mass percent of the total iron in the solid is 55.38 percent and the mass percent of the chloride ions is 0.94 percent, and the solid is transported to an iron-making sintering plant by steam to be used as a blast furnace iron-making raw material; the separated liquid is returned to be used as the water for the waste acid-washing sludge pulping.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (5)
1. A resource utilization method of high-chlorine iron-containing waste sludge is characterized in that solid iron-containing materials and liquid are separated from the high-chlorine iron-containing waste sludge through a wet method, and the liquid is sintered to inhibit a powdering agent for resource utilization;
the method specifically comprises the following steps:
1) adding water and quicklime powder into high-chlorine iron-containing waste acid-washed sludge, and mixing the waste acid-washed sludge, the water and the quicklime powder in a mass ratio of 1: 5-50: 0.1-1, wherein the pH value of the waste acid-washing sludge is 3-6, the mass percent of total iron is 35-55%, and the mass percent of chloride ions is 5-26%;
2) separating the slurry, wherein the separated solid is an iron-containing material, the mass percent of total iron is 45-68%, and the mass percent of chloride ions is less than 1%; the separated solution is CaCl2The solution is used as a sintering inhibition powdering agent for spraying;
3) the separated solid and solution are stored separately for use.
2. The resource utilization method of the high-chlorine iron-containing waste sludge according to claim 1, wherein the pH value of the mixed solution after the mixing and pulping in the step 1) is 7-12.
3. The resource utilization method of the high-chlorine iron-containing waste sludge according to claim 1, wherein a plate-and-frame filter press is adopted in the step 2) to filter-press and separate the slurry, and the filter-press pressure is 1.0 MPa-2.0 MPa.
4. A treatment system of high-chlorine iron-containing waste sludge, which is applied to the resource utilization method of the high-chlorine iron-containing waste sludge as claimed in any one of claims 1 to 3, and comprises a mixing tank for mixing and pulping and a first stirrer arranged in the mixing tank, and is characterized in that: the treatment system also comprises a first filter press for filter-pressing and solid-liquid separation, a first liquid storage tank for storing liquid separated by the first filter press, a solid storage bin for storing solid separated by the first filter press and a first conveying pump for guiding slurry in the mixing tank into the first filter press.
5. The system for treating high-chlorine iron-containing waste sludge according to claim 4, wherein: the treatment system also comprises a second filter press, a solid receiving vehicle for storing the solid separated by the second filter press, a second liquid storage tank for storing the liquid separated by the second filter press, and a stirring pool for adding water into the solid introduced into the solid storage bin, stirring and mixing, wherein the slurry in the stirring pool is introduced into the second filter press through a second conveying pump, and the liquid in the second liquid storage tank is introduced into the mixing tank through a third conveying pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810237963.1A CN108373249B (en) | 2018-03-22 | 2018-03-22 | Resource utilization method and treatment system for high-chlorine iron-containing waste sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810237963.1A CN108373249B (en) | 2018-03-22 | 2018-03-22 | Resource utilization method and treatment system for high-chlorine iron-containing waste sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108373249A CN108373249A (en) | 2018-08-07 |
| CN108373249B true CN108373249B (en) | 2021-03-12 |
Family
ID=63018969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810237963.1A Active CN108373249B (en) | 2018-03-22 | 2018-03-22 | Resource utilization method and treatment system for high-chlorine iron-containing waste sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108373249B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394581A (en) * | 2020-04-30 | 2020-07-10 | 舒新前 | Method for removing harmful components in iron-containing solid waste |
| CN113023989A (en) * | 2021-03-13 | 2021-06-25 | 宝钢湛江钢铁有限公司 | Method for treating silicon-containing sludge by using wastewater zero discharge system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5102556A (en) * | 1990-03-30 | 1992-04-07 | Union Oil Company Of California | Method for rendering ferric hydroxide sludges recyclable |
| CN102051475A (en) * | 2009-11-04 | 2011-05-11 | 饶文涛 | Method for recycling acid-washed iron-containing sludge |
| CN205115245U (en) * | 2015-11-05 | 2016-03-30 | 杨文杰 | Mud zero release processing system |
| CN106116004A (en) * | 2016-08-09 | 2016-11-16 | 天津正达科技有限责任公司 | A kind of steel hydrochloric acid pickling effluent resource reclaims and the processing method of zero-emission |
-
2018
- 2018-03-22 CN CN201810237963.1A patent/CN108373249B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108373249A (en) | 2018-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101962239B (en) | Method for purifying titanium white wastewater | |
| CN103588235B (en) | Method for producing polyaluminium sulfate by using red mud slag | |
| CN103058253A (en) | Method for preparing gypsum by free sulfuric acid in titanium dioxide wastewater | |
| CN109078962B (en) | Combined treatment method of arsenic-containing acidic wastewater, red mud and carbide slag | |
| CN103626322A (en) | Double-alkali neutralization treatment method of heavy metal-containing acidic wastewater | |
| CN102703696A (en) | Method for recovering valuable metal from red soil nickel minerals comprehensively | |
| CN108373249B (en) | Resource utilization method and treatment system for high-chlorine iron-containing waste sludge | |
| CN104108814B (en) | A kind of method processing Rutile type Titanium Dioxide waste water | |
| CN105567976A (en) | Method for treating vanadium extracting industrial acid wastewater and comprehensively recycling valuable metal | |
| CN104388687A (en) | Comprehensive recycling utilization method for sintering electric dust removal ash | |
| CN104192971A (en) | Method for treating industrial wastewater containing sulfuric acid | |
| CN104876357B (en) | Steel pickling waste liquor prepares the method for nanoscale ferroso-ferric oxide | |
| CN104071954A (en) | Method of treating high-iron red mud by alkaline process for deep dealkalization and iron enrichment | |
| CN103131867A (en) | Method for extracting vanadium from vanadium containing slag | |
| CN108866337A (en) | A method of processing metal sludge | |
| CN104711428B (en) | Method for preparing and recovering metal in pickling sludge | |
| CN105050961B (en) | The manufacture method of ironmaking bloodstone | |
| CN102719667A (en) | Method for extracting manganese from electrolytic manganese waste residues or low-quality manganese ore by utilizing mechanochemical method and auxiliary agent thereof | |
| CN104874402A (en) | Preparation of vanadium-titanium steel slag-based zinc ferrite catalyst and method for treating printing and dyeing wastewater | |
| CN104988337B (en) | The bone coal navajoite extract technology that a kind of spent acid recycles | |
| CN114455741A (en) | Method for treating acidic wastewater of titanium chloride white | |
| CN108163880B (en) | Method for preparing gypsum powder by using zinc smelting waste acid | |
| CN209554939U (en) | A kind of stainless steel acid-washing waste liquid commercialization system | |
| CN108996752B (en) | Method for recovering low-concentration nickel from nickel extraction waste water | |
| CN106929686B (en) | Method for cooperatively recovering copper in ferric trichloride etching waste liquid by utilizing metal sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 243003 8 Jiuhua Road, Yushan, Ma'anshan, Anhui Applicant after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Applicant before: Ma'anshan Iron and Steel Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |