CN104588388A - Comprehensive utilization method for chromium-containing leather waste - Google Patents

Comprehensive utilization method for chromium-containing leather waste Download PDF

Info

Publication number
CN104588388A
CN104588388A CN201310528476.8A CN201310528476A CN104588388A CN 104588388 A CN104588388 A CN 104588388A CN 201310528476 A CN201310528476 A CN 201310528476A CN 104588388 A CN104588388 A CN 104588388A
Authority
CN
China
Prior art keywords
chromium
leather castoff
chromium leather
castoff
comprehensive utilization
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
CN201310528476.8A
Other languages
Chinese (zh)
Inventor
崔利群
高志远
崔国英
刘日�
曹建生
张扬
王志辉
李殿杰
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.)
Hebei Yingfeng Renewable Resource Utilization Co Ltd
Original Assignee
Hebei Yingfeng Renewable Resource Utilization 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.)
Filing date
Publication date
Application filed by Hebei Yingfeng Renewable Resource Utilization Co Ltd filed Critical Hebei Yingfeng Renewable Resource Utilization Co Ltd
Priority to CN201310528476.8A priority Critical patent/CN104588388A/en
Publication of CN104588388A publication Critical patent/CN104588388A/en
Pending legal-status Critical Current

Links

Abstract

The invention provides a comprehensive utilization method for chromium-containing leather waste, and solves the problem that chromium-containing leather waste cannot be fully utilized in the prior art. The comprehensive utilization method of chromium-containing leather waste comprises the following steps: step 1, tearing chromium-containing leather waste to enable the length and the width of chromium-containing leather waste to both be 5 cm or less; step 2, performing drying processing on torn chromium-containing leather waste fragments until the water content is 25% or less; step 3, combusting the dried chromium-containing leather waste fragments at 850-1500 DEG C; and step 4, performing chromium oxides extraction on the chromium-containing leather waste ash subjected to high-temperature combustion. Through the above designed technical scheme, chromium-containing leather waste is combusted, generated heat energy can be utilized, and also chromium in chromium-containing leather waste can be recovered and reutilized, so that sufficient utilization on chromium-containing leather waste is finished.

Description

A kind of method of comprehensive utilization containing chromium leather castoff
Technical field
The present invention relates to resource reutilization technical field, refer to a kind of method of comprehensive utilization containing chromium leather castoff especially.
Background technology
The fast development of Chinese leather industry, the economy in each place and the development of related industry are driven, the leather production base of about ten is defined on the ground such as Hebei, Shandong, Zhejiang, Xinjiang in the whole nation, year consumes the skins about 2,600,000 tons such as cattle and sheep pig, the leather industry thereupon produced produces a large amount of leather castoff, waste material account for raw hide heavy 60%, national annual production is about about 1,560,000 tons.
According to investigation, the whole nation is among the people has the discarded object that fur clothing, suitcase, leather shoes, automobile leather saddle, leather glove etc. estimate can collect in year more than 50,000 tons, and these finished products also chromium-containing oxide, belongs to hazardous waste.Country is according to the requirement of environmental protection, and for avoiding causing secondary pollution also to formulate relevant laws and regulations standardized administration, carry out reclaiming and disposing, be also available resource concerning our enterprise.
Leather castoff is now put into " National Hazard product catalogue ", wherein containing chromated oxide, not easily utilize, not easily take care of, very easily causing the pollution of soil and groundwater, as processed not in time, also can distribute acid smell, contaminated air environment, more seriously jeopardize food service industry and water source, such as " toxic capsule " event and " containing chromium beverage " event, therefore how to utilize this resource to make it " turn waste into wealth " to become the research topic that important.
Leather castoff has following characteristic can utilize as regenerated resources:
1, calorific value is higher, containing the calorific value of chromium leather castoff more than per kilogram 6453 kilocalorie, is equivalent to the caloric value of standard coal.
2, containing chrome tanning agent, through burning process, from leather ash, the very high chromated oxide had an economic benefit can be extracted by special process process, can be used for refractory material, glass, colorant, also can be used for extracting crome metal.
Show according to above-mentioned two dot characteristics, brainstrust identification is at present with burning process process leather castoff, there is extraordinary social benefit, thoroughly solve leather castoff and flow into the problem that society causes secondary pollution, and ensure that leather industry health develops fast, and the recycling thoroughly realized at leather castoff, there is " energy-saving and emission-reduction " policy utilizing China, through experiment display: leather castoff per ton can produce 5 tons of steam and 0.0372 ton of chromated oxide, if calculated by the quantity of now national leather castoff, whole collection also utilizes with technique, standard coal 1,430,000 tons can be saved every year, 100% chromated oxide 5.8 tons can be added, annual China can reduce import chrome ore 11.6 ten thousand tons, greatly reduce the discharge capacity of carbon dioxide simultaneously, reach the requirement of national energy-saving reduction of discharging and environmental protection simultaneously, meet " one two five " development plan of country.
Summary of the invention
The present invention proposes a kind of method of comprehensive utilization containing chromium leather castoff, solves existing in the art to the problem that can not make full use of containing chromium skin discarded object.
Technical scheme of the present invention is achieved in that
Containing a method of comprehensive utilization for chromium leather castoff, comprise following several step:
Step 1: tear up containing chromium leather castoff, tears up to containing the long and wide length Jun≤5cm of chromium leather castoff fragment;
Step 2: drying and processing is carried out to the chromium leather castoff fragment that contains after tearing up, dries to moisture content Han Liang≤25%;
Step 3: to the burning carrying out 850 ~ 1500 DEG C containing chromium leather castoff fragment after oven dry;
Step 4: the extraction leather ash containing chromium leather castoff after high-temp combustion being carried out to chromated oxide.
As further technical scheme, described step 3 is specially:
To after drying being 1000 ~ 1100 DEG C containing the temperature of chromium leather castoff debris burns.
As further technical scheme, described step 1 is specially:
Tearing up containing chromium leather castoff, tearing up to containing chromium leather castoff fragment diameter span 2 ~ 5cm;
As further technical scheme, described step 2 is specially:
Drying and processing is carried out to the chromium leather castoff fragment that contains after tearing up, dries to moisture content Han Liang≤20%.
As further technical scheme, described step 2 also comprises:
The dust removal process of carrying out in described drying and processing process.
As further technical scheme, described step 3 also comprises:
The vent gas treatment of carrying out in described burning process.
As further technical scheme, the described drying and processing in described step 2 is specially hot-air seasoning process.
Present invention process principle and beneficial effect:
By the burning containing chromium leather castoff, utilize the combustion characteristics of itself, can utilize the heat energy produced containing chromium leather castoff fully, available thing production steam is for industrial application or get dim; Also can extract chromated oxide in the leather ash after its burning, and then reach the abundant recycling containing chromium leather castoff.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the process flow diagram of a kind of method of comprehensive utilization containing chromium leather castoff of the present invention;
Fig. 2 is the comprehensive utilization schematic diagram of a kind of method of comprehensive utilization containing chromium leather castoff of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of method of comprehensive utilization containing chromium leather castoff, comprise following several step:
Step 1: tear up containing chromium leather castoff, tears up to containing the long and wide length Jun≤5cm of chromium leather castoff fragment;
Step 2: drying and processing is carried out to the chromium leather castoff fragment that contains after tearing up, dries to moisture content Han Liang≤25%;
Step 3: to the burning carrying out 850 ~ 1500 DEG C containing chromium leather castoff fragment after oven dry;
Step 4: the extraction leather ash containing chromium leather castoff after high-temp combustion being carried out to chromated oxide.
Regenerated leather and leather fiber-based material, feed and fertilizer is done containing chromium leather castoff, market demand is limited on the one hand, on the other hand, do not give full play to the recycling of collagen and chromium, even the existence of chromium have impact on final application, therefore value-added content of product is not high, and economic worth is little, is difficult in actual applications promote.
And find through many experiments, containing the calorific value of chromium leather castoff more than per kilogram 6453 kilocalorie, be equivalent to the caloric value of standard coal, therefore the present invention proposes a kind of to burn and utilize the method for comprehensive utilization of its heat energy containing chromium leather castoff: will containing chromium leather castoff tear up for diameter be 2 ~ 5cm fragment also oven dry to moisture content Han Liang≤25%, what reprocessing was good carries out Thorough combustion containing chromium leather castoff fragment under 850 ~ 1500 DEG C of temperature conditions, in combustion, for ensureing the Thorough combustion of burning material, content two problems that is that solve fragment and moisture content in contact area that is air and fragment, above data are that many experiments draws material clean-burning material process data, method can utilize containing chromium leather castoff combustion heat energy fully thus, and can the chromium containing chromium leather castoff be all retained in leather ash with the form of chromated oxide and chromic salts, again through special process process, chromated oxide in leather ash can be extracted, and then reach the complete recycling containing chromium in chromium leather castoff.
As further technical scheme, described step 3 is specially:
To after drying being 1000 ~ 1100 DEG C containing the temperature of chromium leather castoff debris burns.
Through experiment display, containing chromium leather castoff under the high temperature of 850 ~ 1500 DEG C after Thorough combustion, the Small molecular such as nitrogen oxide, oxysulfide, carbon dioxide and water are broken down into containing the collagen in chromium leather castoff, chromium in discarded object is then kept in leather ash with the form of inorganic salts and oxide, then is undertaken extracting chromated oxide by special process.
But find to burn under the condition of 850 ~ 1000 DEG C containing chromium leather castoff through experiment, the peculiar smell of one albumen burning can be produced, the working environment of surrounding is had a certain impact, and burns under the condition of 1000 ~ 1500 DEG C, then there will not be this burning peculiar smell, certain raising can be caused to the processing cost containing chromium leather castoff containing the burning under the condition of 1100 ~ 1500 DEG C of chromium leather castoff, and ignition temperature more than 1450 ~ 1500 DEG C time, requirement for combustion apparatus also can improve a lot, and then the increase of production cost can be caused, therefore the present invention, after many experiments, preferably to after drying being 1000 ~ 1100 DEG C containing the temperature of chromium leather castoff debris burns, not only can protect environment, also can be cost-saving, certainly, under the condition of 850 ~ 1000 DEG C and 1100 ~ 1500 DEG C, same beneficial effect can be reached to containing chromium leather castoff burning process for containing chromium leather castoff.
As further technical scheme, described step 1 is specially:
Tearing up containing chromium leather castoff, tearing up to containing chromium leather castoff fragment diameter span 2 ~ 5cm;
Before oven dry and burning, first tearing up of material is carried out containing chromium leather castoff, not only the moisture content in material can be removed a part by the method for extruding in the process of tearing up, by tearing up the chip size being shredded into by material and being applicable to burning in addition, both the contact surface containing chromium leather castoff fragment and air had been made to increase, can not be inconvenient to burn in combustion apparatus because fragment is too small again, draw through experiment, above combustion requirements can be completed by tearing up the fragment being less than 5cm for diameter containing chromium leather castoff, especially in the span of 2 ~ 5cm, combustion efficiency is best.
As further technical scheme, described step 2 is specially:
Drying and processing is carried out to the chromium leather castoff fragment that contains after tearing up, dries to moisture content Han Liang≤20%.
Containing the moisture content containing about more than 60% in chromium leather castoff, drying and processing will be carried out before burning process, show through many experiments, combustion efficiency can be affected more than 25% containing the content of moisture content in chromium leather castoff, and the flue gas after burning can not use more greatly in the drying and processing of step 2 due to aqueous vapor, water content ≤20% of material after preferably drying in the present invention, the combustion efficiency of the material that not only can better reach, and better can reach saving burning cost.
As further technical scheme, described step 2 also comprises:
The dust removal process of carrying out in described drying and processing process.
Carry out in drying and processing process to the chromium leather castoff fragment that contains after tearing up, owing to containing many dusts and fine debris containing chromium leather castoff fragment, be easy in drying and processing process produce dust, certain impact can be produced to the environment of surrounding and the health of staff, the present invention adds dust removal process in described drying and processing process, avoids the impact on environment in drying and processing process.
As further technical scheme, described step 3 also comprises:
The vent gas treatment of carrying out in described burning process.
To containing in chromium leather castoff debris burns processing procedure, create not flue gas, owing to containing collagen containing chromium leather castoff, the pernicious gas such as nitrogen oxide and oxysulfide can be produced after high-temp combustion, if be directly discharged in air, impact greatly can be produced to environment, the present invention, the vent gas treatment of carrying out in described burning process, by plant equipment, flue gas is carried out to the exhaust gas treating methods such as the spray of alkaline solution, can the pernicious gas such as nitrogen oxide and oxysulfide effectively in smoke treatment, and then reach safe discharge standard.
As further technical scheme, the described drying and processing in described step 2 is specially hot-air seasoning process.
In the present invention, the preferred hot-air seasoning process of drying and processing in step 2, this kind of drying and processing mode, can go out moisture content by the fluxion strap of hot blast, and directly can utilize the flue gas of the heat produced containing the burning of chromium leather castoff, and then can be cost-saving further.
The present invention is a kind of to the method for comprehensive utilization containing chromium leather castoff, the method not only can utilize containing chromium leather castoff fully, more can save certain energy, and produce certain profit, it is below in October, 2012, chemical industrial park is cleaned, the embodiment record that the method for comprehensive utilization proposed with the present invention is carried out in Xinji City of Hebei province:
Embodiment 1:
By 5 tons of water contents 60% containing chromium leather castoff, all tearing up is the fragment of 4.5 ~ 5cm, and water content is dried to 25%, the material of having dried is burnt under the condition of 1100 DEG C, 10.2 tons of steam can be produced, and can be recycled to 78.0 kilograms of chromated oxides, produce a profit and be about 2000 yuans.
Embodiment 2:
By 5 tons of water contents 60% containing chromium leather castoff, all tearing up is the fragment of 4.5 ~ 5cm, and water content is dried to 20%, the material of having dried is burnt under the condition of 1100 DEG C, 10.4 tons of steam can be produced, and can be recycled to 78.1 kilograms of chromated oxides, produce a profit and be about 2100 yuans.
Embodiment 3:
By 5 tons of water contents 60% containing chromium leather castoff, all tearing up is the fragment of 4.5 ~ 5cm, and is dried to by fragment absolutely dry, the material of having dried is burnt under the condition of 1100 DEG C, can produce 10.3 tons of steam, and can be recycled to 78.1 kilograms of chromated oxides, producing a profit is 1100 yuans.
Embodiment 4:
By 5 tons of water contents 60% containing chromium leather castoff, all tearing up is the fragment of 4.5 ~ 5cm, and water content is dried to 20%, the material of having dried is burnt under the condition of 850 DEG C, burning time doubles, and material can burn completely, can produce 10.4 tons of steam, and can be recycled to 78.2 kilograms of chromated oxides, produce a profit and be about 1300 yuans.
Embodiment 5:
By 5 tons of water contents 60% containing chromium leather castoff, all tearing up is the fragment of 4.5 ~ 5cm, and water content is dried to 20%, the material of having dried is burnt under the condition of 1500 DEG C, 10.4 tons of steam can be produced, and can be recycled to 78.0 kilograms of chromated oxides, produce a profit and be about 1300 yuans.
Contrast visible by above-described embodiment 1 ~ 3, can utilize as biomass energy containing chromium leather castoff, and can completely with the form of chromated oxide recovery chromium wherein, to in material process, under the chip size be applicable to and ignition temperature condition, the water content in material can affect containing chromium leather castoff recovery utilization rate, and it is more that reason is to dry moisture content in rear fragment, too much heat energy can be consumed in burning process, and then affect economic benefit; And long to fragment drying and processing process drying time, though the water content of fragment reduces greatly, increase owing to drying power consumption, can economic benefit be affected equally.
Contrast visible by above-described embodiment 2, embodiment 4 with embodiment 5, under the chip size be applicable to and water content condition, burn under the condition of 850 DEG C, have a certain amount of chromium leather castoff that contains same burning time not burn completely, prolonging burning time, material can be made to burn completely, but can increase because of burning cost, and then affect economic benefit; Burn under the condition of 1500 DEG C because burning cost increases, and then profit is reduced, and then affect economic benefit.
In sum, can make full use of containing chromium leather castoff with a kind of method of comprehensive utilization containing chromium leather castoff proposed by the invention, and certain profit can be produced.
Present invention process principle and beneficial effect:
By the burning containing chromium leather castoff, utilize the combustion characteristics of itself, can utilize the heat energy produced containing chromium leather castoff fully, available thing production steam is for industrial application or get dim; Also can extract chromated oxide in the leather ash after its burning, and then reach the abundant recycling containing chromium leather castoff.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1., containing a method of comprehensive utilization for chromium leather castoff, it is characterized in that, comprise following several step:
Step 1: tear up containing chromium leather castoff, tears up to containing the long and wide length Jun≤5cm of chromium leather castoff fragment;
Step 2: drying and processing is carried out to the chromium leather castoff fragment that contains after tearing up, dries to moisture content Han Liang≤25%;
Step 3: to the burning carrying out 850 ~ 1500 DEG C containing chromium leather castoff fragment after oven dry;
Step 4: the extraction leather ash containing chromium leather castoff after high-temp combustion being carried out to chromated oxide.
2. a kind of method of comprehensive utilization containing chromium leather castoff as claimed in claim 1, it is characterized in that, described step 3 is specially:
To after drying being 1000 ~ 1100 DEG C containing the temperature of chromium leather castoff debris burns.
3. a kind of method of comprehensive utilization containing chromium leather castoff as claimed in claim 1 or 2, it is characterized in that, described step 1 is specially:
Tearing up containing chromium leather castoff, tearing up to containing chromium leather castoff fragment diameter span 2 ~ 5cm.
4. a kind of method of comprehensive utilization containing chromium leather castoff as claimed in claim 3, it is characterized in that, described step 2 is specially:
Drying and processing is carried out to the chromium leather castoff fragment that contains after tearing up, dries to moisture content Han Liang≤20%.
5. a kind of method of comprehensive utilization containing chromium leather castoff as claimed in claim 4, it is characterized in that, described step 2 also comprises:
The dust removal process of carrying out in described drying and processing process.
6. a kind of method of comprehensive utilization containing chromium leather castoff as claimed in claim 5, it is characterized in that, described step 3 also comprises:
The vent gas treatment of carrying out in described burning process.
7. a kind of method of comprehensive utilization containing chromium leather castoff as claimed in claim 1, it is characterized in that, the described drying and processing in described step 2 is specially hot-air seasoning process.
CN201310528476.8A 2013-10-30 2013-10-30 Comprehensive utilization method for chromium-containing leather waste Pending CN104588388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310528476.8A CN104588388A (en) 2013-10-30 2013-10-30 Comprehensive utilization method for chromium-containing leather waste

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310528476.8A CN104588388A (en) 2013-10-30 2013-10-30 Comprehensive utilization method for chromium-containing leather waste

Publications (1)

Publication Number Publication Date
CN104588388A true CN104588388A (en) 2015-05-06

Family

ID=53114639

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310528476.8A Pending CN104588388A (en) 2013-10-30 2013-10-30 Comprehensive utilization method for chromium-containing leather waste

Country Status (1)

Country Link
CN (1) CN104588388A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700003899A1 (en) * 2017-01-16 2018-07-16 Ilsa S P A Method for the preparation of a fertilizer for agricultural use, as well as fertilizer thus prepared
CN108658071A (en) * 2017-03-31 2018-10-16 北京化工大学 It is a kind of using chromium skin as biomass porous carbon of raw material and its preparation method and application
CN109433781A (en) * 2018-09-19 2019-03-08 河北赢丰再生资源利用有限公司 A kind of recycling and harmless treatment process of the circulating waste garrulous material of leather containing chromium
CN110002499A (en) * 2019-04-29 2019-07-12 徐鑫磊 Pisi recycling, which is discarded, containing chromium recycles production harmless treatment process

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007081296A1 (en) * 2006-01-16 2007-07-19 Gep Yesil Enerji Uretim Teknolojileri Ltd. Sti. Downdraft/updraft gasifier for syngas production from solid waste
CN101058642A (en) * 2007-05-21 2007-10-24 晋江兴业皮制品有限公司 Comprehensive utilization method of leather castoff
WO2009016649A1 (en) * 2007-08-01 2009-02-05 Council Of Scientific & Industrial Research A process for the preparation of a mixture of carbonaceous products from proteinaceous materials
CN201373415Y (en) * 2009-03-04 2009-12-30 潍坊华友亚麻纺织有限公司 Boiler fuelled by leather products industrial waste and coal
CN102634360A (en) * 2012-05-02 2012-08-15 福建天科环保科技发展有限公司 Process for processing synthetic leather leftovers by utilizing dry distillation technology
CN103014191A (en) * 2012-12-13 2013-04-03 四川大学 Method for recovering collagen and chromium salts from chromium-containing scrap leather residues
CN103130670A (en) * 2013-01-04 2013-06-05 南平博士达节能科技有限公司 Synthetic leather dimethyl formamide (DMF) recycling residue processing technology and synthetic leather DMF recycling residue processing system
GB2499329A (en) * 2013-02-26 2013-08-14 Slg Technology Ltd Thermal energy plant for utilising waste from the tanning process
CN103363530A (en) * 2013-03-21 2013-10-23 温州市特种设备检测中心 Leather waste vaporizing combustion and heat recovery system, and operation method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007081296A1 (en) * 2006-01-16 2007-07-19 Gep Yesil Enerji Uretim Teknolojileri Ltd. Sti. Downdraft/updraft gasifier for syngas production from solid waste
CN101058642A (en) * 2007-05-21 2007-10-24 晋江兴业皮制品有限公司 Comprehensive utilization method of leather castoff
WO2009016649A1 (en) * 2007-08-01 2009-02-05 Council Of Scientific & Industrial Research A process for the preparation of a mixture of carbonaceous products from proteinaceous materials
CN201373415Y (en) * 2009-03-04 2009-12-30 潍坊华友亚麻纺织有限公司 Boiler fuelled by leather products industrial waste and coal
CN102634360A (en) * 2012-05-02 2012-08-15 福建天科环保科技发展有限公司 Process for processing synthetic leather leftovers by utilizing dry distillation technology
CN103014191A (en) * 2012-12-13 2013-04-03 四川大学 Method for recovering collagen and chromium salts from chromium-containing scrap leather residues
CN103130670A (en) * 2013-01-04 2013-06-05 南平博士达节能科技有限公司 Synthetic leather dimethyl formamide (DMF) recycling residue processing technology and synthetic leather DMF recycling residue processing system
GB2499329A (en) * 2013-02-26 2013-08-14 Slg Technology Ltd Thermal energy plant for utilising waste from the tanning process
CN103363530A (en) * 2013-03-21 2013-10-23 温州市特种设备检测中心 Leather waste vaporizing combustion and heat recovery system, and operation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
卞研: "铬革废料焚烧处理的研究", 《西部皮革》 *
陈春燕等: "制革固体废弃物的综合利用技术及其新进展", 《皮革科学与工程》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700003899A1 (en) * 2017-01-16 2018-07-16 Ilsa S P A Method for the preparation of a fertilizer for agricultural use, as well as fertilizer thus prepared
CN108658071A (en) * 2017-03-31 2018-10-16 北京化工大学 It is a kind of using chromium skin as biomass porous carbon of raw material and its preparation method and application
CN108658071B (en) * 2017-03-31 2021-02-19 北京化工大学 Biomass porous carbon taking chromium skin as raw material and preparation method and application thereof
CN109433781A (en) * 2018-09-19 2019-03-08 河北赢丰再生资源利用有限公司 A kind of recycling and harmless treatment process of the circulating waste garrulous material of leather containing chromium
CN110002499A (en) * 2019-04-29 2019-07-12 徐鑫磊 Pisi recycling, which is discarded, containing chromium recycles production harmless treatment process

Similar Documents

Publication Publication Date Title
CN104588388A (en) Comprehensive utilization method for chromium-containing leather waste
CN103084379B (en) Environment-friendly comprehensive treatment method for kitchen garbage and waste oil
Hong et al. Life cycle assessment of sewage sludge co-incineration in a coal-based power station
CN105114961B (en) A kind of method and its heat recovery system that the recovery processing of waste oil paint can recycles
Bo et al. Life cycle assessment of internal recycling options of steel slag in Chinese iron and steel industry
Zhang et al. Energy saving and emission reduction: A project of coal-resource integration in Shanxi Province, China
CN205761736U (en) A kind of preprocessing device for generating power by rubbish
CN102363151A (en) Low-temperature dry distillation and high-temperature quick thermal decomposition treatment process method for municipal domestic garbage
CN105382016A (en) Household garbage pretreatment technique
CN105903743B (en) A kind of domestic garbage resource Terminal Treating
CN105823056B (en) A kind of house refuse drying oven and furnace drying method
CN205856387U (en) A kind of waste treatment device
CN207749086U (en) Waste tire utilizes system with sludge circulation
CN104690070A (en) Treatment method of municipal domestic waste
CN105903744B (en) A kind of house refuse deactivation handling process and its deodorizing disinfectant
JP2013035919A (en) Method for producing solid fuel
JP2006181564A (en) Incinerator having high efficiency-generator using biogas
CN203373248U (en) Sludge low-temperature heat quenching and tempering anaerobic methane-generating complete treatment device
CN106556015A (en) It is a kind of to recycle the heat recovery system for recycling for waste oil paint can
CN202717824U (en) System for comprehensively utilizing coal gas and dust of iron and steel plant
CN101973521A (en) Method for forming oxygen and hydrogen by using steam and carbon monoxide through regenerating reduction and circular gasification
CN205037315U (en) A heat recovery system that is used for recovery processing of waste oil paint can to recycle
CN204962828U (en) Coal charge cyclic utilization device
CN203878104U (en) Environment-friendly treatment device for waste plastics, scrap aluminum plastic molds and scrap tires
CN207563415U (en) The equipment that a kind of domestic garbage resource utilizes

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20150506