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2083 results about "Coal chemical industry" patented technology

Coal Chemical Industry. Technologies in the coal chemical industry such as tar fractionation, benzol hydrogenation, anthraquinone production, device reaction and distillation, and rectification devices have a relatively high requirement for temperature regulation.

Technology for recovering water resources and salt from coking wastewater in coal chemical industry

A technology for recovering water resources and salt from coking wastewater in the coal chemical industry comprises the following steps: the wastewater is subjected to defluorination chemical treatment and subjected to sodium carbonate softening and precipitating treatment simultaneously, an advanced oxidation process is used for TOC (total organic carbon) degradation, a multi-medium and activated carbon filter is used for filtering separation, ultrafiltration is performed, nanofiltration membrane separation is performed, calcium and magnesium ions are separated, the calcium and magnesium ions in water produced through nanofiltration are lower than 2 mg / L, CaF2 crystallization scaling is hard to form, and nanofiltration passing liquid and nanofiltration strong brine are obtained; the nanofiltration passing liquid and the nanofiltration strong brine are treated respectively. Fluoride ions, hardness and organic carbon in the wastewater are removed, separation of multivalent salt and monovalent salt as well as concentration and evaporative crystallization of the salt is realized, more than 98% of the water resources is recovered, more than 95% of the salt resources are recovered, secondary hazardous waste is not produced, the system operation cost is reduced, and the problem about resource recovery and the environmental problem are solved finally.
Owner:湖南湘牛环保实业有限公司

Ammonia process flue gas treatment method for acidic tail gas and device

ActiveCN103223292AIncreased self-concentrationGood desulfurization absorptionDispersed particle separationAmmonium sulfatesEnvironmental resistanceAmmonia storage
The invention relates to an ammonia process flue gas treatment method for acidic tail gas. The method includes the steps of: 1) controlling the sulfur dioxide concentration of tail gas entering an absorption tower at a level of less than or equal to 30000mg/Nm<3>; 2) arranging process water in an absorption tower entrance flue or in the absorption tower or cooperating with a ammonium sulphate solution to perform spray cooling; 3) disposing an oxidation section in the absorption tower, setting an oxidation distributor at the oxidation section to achieve oxidation of a desulfurized absorption liquid; 4) arranging an absorption section in the absorption tower, utilizing an absorption liquid distributor in the absorption section to realize desulfurization spray absorption by an ammonia-containing absorption liquid, which is fed through an ammonia storage groove; 5) arranging a water washing layer at an absorption section upper part in the absorption tower, washing the absorption liquid in the tail gas by the water washing layer and reducing the absorption liquid escape; and 6) setting a demister at the upper part of the water washing layer in the absorption tower to control the mist drop content in the purified tail gas. Employment of the Claus sulfur recovery and ammonia process desulfurization integrated desulfurization technology in the coal chemical industry can reduce the investment cost of after-treatment, the process can be simpler, and factory environmental protection treatment can form an intensive advantage.
Owner:JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION

Comprehensive desulphurization technology in coal chemical industry

The invention discloses a comprehensive desulphurization technology in the coal chemical industry. The comprehensive desulphurization technology comprises the following steps: acidic gas containing hydrogen sulfide and coming from a low-temperature methanol washing device burns to generate mixed gas, and the mixed gas is subjected to two stages of cooling to separate out liquid sulfur for producing solid sulfur; sulphuric mixed gas separated out after cooling is subjected to secondary combustion so that all sulphureous components in the mixed gas are changed into SO2, tail gas generated after combustion and boiler flue gas of a heating power station are fully mixed and enter a desulphurization tower, circulating liquid containing aqua ammonia is used as an absorbent to absorb SO2 in a countercurrent contact way and react to generate ammonium sulfite, and ammonium sulfite is further oxidized to change into ammonium sulfate; desulphurized and purified flue gas is discharged into air through a chimney; ammonium sulfate solution at the bottom of the desulphurization tower enters a circulation tank and is crystallized to form the ammonium sulfate product. The comprehensive desulphurization technology adopts a novel combined desulphurization technology to replace the traditional Klaus Scott or Super Claus technology, and can effectively lower investment, improve recovery rate of sulfur and reduce discharge of sulfur.
Owner:XINWEN MINING GROUP

Coal chemical industry wastewater treating method

The invention relates to a coal chemical wastewater treatment method, in particular to a chemical wastewater treatment method. The invention aims to solve the problems of the chemical wastewater treatment method such as bad outlet water quality and high operational cost. The method comprises the following steps: pretreating coal chemical wastewater to be treated; then carrying out hydrolytic acidification treatment, external circulating anaerobic treatment, anaerobic sedimentation treatment, adjusting hydrolytic acidification treatment, contact oxidation treatment, sedimentation treatment, A / O treatment, sedimentation treatment, deamination treatment, coagulating sedimentation treatment and aeration biological filter tank treatment, wherein the temperature in an external circulating anaerobic tank is controlled within the scope of 32 to 35 DEG C; the hydraulic detention time is 24 to 36 h; the sludge concentration is controlled between 50 and 100 g / L; the volume load is 5 to 10 kg COD / m.d ; and the pH value is controlled between 7.0 and 7.5. The invention has the advantages of flexible operation, impact load resistance, low operating cost and good treatment effect; after the coal chemical wastewater is treated by the treatment method, the outlet water quality completely can achieve the wastewater comprehensive discharge standard regulated by the State.
Owner:HARBIN INST OF TECH

Method for extracting and dephenolizing coal chemical industry wastewater

The invention discloses a method for extracting and dephenolizing coal chemical industry wastewater. Two different solvents are used as extracting agents, and serially-connected double-tower two-stage extracting dephenolization is adopted. The method comprises the following steps of: after carrying out gravity settling oil removal pretreatment on high-concentration phenol-contained wastewater produced in the coal chemical industry process and deacidifying, deaminizing and removing mechanical impurities, carrying out first-stage extracting dephenolization with the first solvent as the extracting agent; and carrying out second-stage extracting dephenolization with the second solvent as the extracting agent and conveying dephenolized water into a biochemical treatment working section. The wastewater subjected to first-stage dephenolization has the total phenol content of 400-1,000mg/l and the COD (Chemical Oxygen Demand) of 2,000-5,000mg/l; the wastewater subjected to second-stage dephenolization has the total phenol content of smaller than 300mg/l and the COD of smaller than 2,000mg/l; and the total phenol removal rate is larger than 90 percent, and the polyphenol removal rate is larger than 70 percent. The invention can meet the requirement of water quality of biochemical treatment, has the advantages of high phenol removal rate, less solvent dosage and low energy consumption and is particularly suitable for treating the wastewater which has high polyphenol content and is produced in the coal gasification, coking and chemical industry synthesis process.
Owner:哈尔滨瑞格能源环境技术发展有限责任公司 +1

Flue gas-treating method and apparatus for treating acidic tail gas by using ammonia process

ActiveUS9370745B2Improve desulfurization efficiencyEffectively control the ammonia slip and the aerosol generationGas treatmentDispersed particle separationFlue gasAmmonia storage
A flue gas-treating method for treating acid tail gas by using an ammonia process, comprising the following steps of: 1) controlling the concentration of sulfur dioxide in an acid tail gas entering an absorber to be ≦30,000 mg / Nm3; 2) spraying and cooling with a process water or / and an ammonium sulfate solution in the inlet duct of the absorber or inside the absorber; 3) providing an oxidation section in the absorber, wherein the oxidation section is provided with oxidation distributors for oxidizing the desulfurization absorption solution; 4) providing an absorption section in the absorber wherein the absorption section achieves desulfurization spray absorption by using absorption solution distributors via an absorption solution containing ammonia; the absorption solution containing ammonia is supplied by an ammonia storage tank; 5) providing a water washing layer above the absorption section in the absorber, wherein the water washing layer washes the absorption solution in the tail gas to reduce the slip of the absorption solution; 6) providing a demister above the water washing layer inside the absorber to control the concentration of mist droplets contained in the cleaned tail gas. In the coal chemical industry, the integration of the Claus sulfur recovery process and the ammonia desulfurization technology can reduce the investment of the post-treatment and simplify the operation process, and provide intensive advantages to the environmental control of plants.
Owner:JIANGNAN ENVIRONMENTAL PROTECTION GRP INC

Thermal pyrolysis combination method and device

The invention discloses a thermal pyrolysis combination method and device and relates to a coal chemical industry technology. A fuel is pyrolyzed in a low-speed bed pyrolyzing furnace, the generated semicoke is discharged from the bottom of the pyrolyzing furnace, sent into a circulating fluid bed gasifier by virtue of a semicoke returning device so as to be subjected to gasification, and coal gas generated by the gasifier, carrying solid particles, enters in a cyclone separator; the gasification temperature of the gasifier is 900-1,200 DEG C, the fuel thermal pyrolysis temperature in the thermal pyrolyzing furnace is 50-200 DEG C lower than the temperature of the gasifier; pyrolysis gas generated in the pyrolyzing furnace is introduced into the upper part of the gasifier or introduced into the cyclone separator together with the coal gas generated in the gasifier; and the solid particles gathered by the cyclone separator are sent above the dense phase area of the pyrolyzing furnace by virtue of the returning device so as to provide heat for pyrolysis of the fuel. The method and device disclosed by the invention are used for pyrolysis and gasification of coal, biomass and other carbon-containing fuels, the generated coal gas has the advantages of high thermal value and low tar content, and the system is simple.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI

Comprehensive utilization method of high-concentration waste saline water containing Na<+>, Ka<+>, NH<4+>, Cl<->, SO4<2-> and NO<3-> in coal chemical industry

The invention relates to a comprehensive utilization method of high-concentration waste saline water containing Na<+>, Ka<+>, NH<4+>, Cl<->, SO4<2-> and NO<3-> in the coal chemical industry. After the high-concentration waste saline water is subjected to softening for impurity removal and subjected to coagulation sedimentation to remove COD (chemical oxygen demand), the water is concentrated by 20%-30% through an air cooler; then, the water enters second and third concentration systems and a salt mixture recovery system, and sodium sulfate, sodium chloride and sodium nitrate and potassium sulfate mixed salt are concentrated and separated with a multi-effect negative pressure evaporation method; condensed water is recycled. The purity of separated sodium chloride and the purity of separated sodium sulfate are higher than 99%, and sodium chloride and sodium sulfate can be directly sold. The method has remarkable economic benefits and social benefits, is environment-friendly, comprehensively reaches the standard and can be used for comprehensive treatment and utilization of similar high-concentration saline water in other industries, so that the environment-friendly and energy-saving requirements for full utilization of resources are met.
Owner:和易中诚环保科技有限公司

Coal tar heavy fraction suspension-bed hydrocracking method and system thereof

The invention belongs to the technical field of coal chemical industry, and provides a coal tar heavy fraction suspension-bed hydrocracking method. The method comprises the following steps: mixing raw materials of coal tar heavy fractions with a catalyst and a vulcanizing agent to form a uniform mixed material; vulcanizing the catalyst in the mixed material under the action of hydrogen; preheating the vulcanized mixed material, and then allowing the preheated material to enter a suspension-bed reactor for hydrocracking reaction; and fractionating the product from the suspension-bed reactor to finally obtain gaseous hydrocarbon, gasoline fractions, diesel fractions and tail oil. In the invention, by directly adopting the hydrocracking method with a coal tar heavy fraction suspension bed and a system thereof, the coal tar heavy fractions can keep light weight, and the yield of the fuel oil product hydrogenated by coal tar can be effectively increased; and the suspension-bed hydrogenation reactor has simple structure without a bed layer, thus causing no phenomena such as blockage, increased pressure drop, overtemperature and the like occurred on the reaction bed layer, and the reactor further has the characteristics of great operation flexibility, long operation cycle, being safe and stable, easy control and the like.
Owner:DALIAN UNIV OF TECH

Multi-stage countercurrent electrodialyzer reversal-based method for treating saline wastewater in coal chemical industry

The invention relates to the field of industrial wastewater treatment processes and provides a multi-stage countercurrent electrodialyzer reversal-based method for treating saline wastewater in the coal chemical industry. The method comprises the following steps: 1) carrying out catalytic ozonation treatment on the saline wastewater in the coal chemical industry; 2) carrying out multi-media filtration and membrane filtration treatment on the wastewater subjected to catalytic ozonation in the step 1) in sequence; and 3) treating the effluent obtained after membrane filtration in the step 2) with a multi-stage countercurrent electrodialyzer reversal, thus achieving deep treatment, desalting and recycling of the saline wastewater in the coal chemical industry, wherein the multi-stage countercurrent electrodialyzer reversal comprises an electrodialysis membrane stack unit, a frequency reversal control unit and an online monitoring and process control unit. The method has the advantages of high fresh water recovery rate, low concentrated water discharge, low operating cost, stability in system operation and the like and can avoid the problems of low fresh water recovery rate, low concentration multiple, high treatment cost, serious membrane pollution, instability in system operation and the like in the routine techniques.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Coal chemical industry high-concentration wastewater treatment method and apparatus

The invention provides a coal chemical industry high-concentration wastewater treatment method and an apparatus which can solve the problems of low flux and high membrane pollution when an MBR (membrane bioreactor) is used for coal chemical industry wastewater treatment in the prior art. The coal chemical industry high-concentration wastewater treatment apparatus comprises an oil separation device, a flocculation reaction device communicated with the oil separation device, an ultra-micro air flotation device communicated with the flocculation reaction device, an advanced oxidation device communicated with the ultra-micro air flotation device, a hydrolysis and acidification device communicated with the advanced oxidation device, a denitrification device communicated with the hydrolysis and acidification device, an anoxic device communicated with the denitrification device, and an aerobic MBR device which comprises a plurality of MBR membranes arranged in the aerobic MBR device and is communicated with the anoxic device. The coal chemical industry high-concentration wastewater treatment method and the device provided by the invention have the beneficial effects that the pretreatment is complete, the subsequent treatment difficulty is low, and the biochemical treatment effect is ensured so as to be favorable for reducing membrane pollution; in addition, the cleaning frequency of the membranes is low and the service life is long; and furthermore, the MBR outlet water is stable, suspended matters are avoided, and the deep treatment effect can be further ensured.
Owner:GO HIGHER ENVIRONMENT GRP CO LTD

Horizontal solid-liquid mixing device and application thereof

The invention relates to a horizontal solid-liquid mixing device and the application thereof. The mixing device comprises a motor, a reduction gearbox, a ratcheting, a front bearing end, a rotary valve, a solid feeding hole, a liquid feeding hole, a mixer shaft, a mixing cylinder, an exhaust hole, a rear bearing end, a discharge hole, a solid-liquid mixing room, a drawing template, a plough coulter, a fixed link of the plough coulter and a baffle; wherein, the drawing template is fixed on the mixer shaft and arranged under the solid feeding hole, the plough coulter is fixed on the mixer shaft by the fixed link of the plough coulter, a plowshare of the plough coulter forms an angle with the mixer shaft, the baffle is arranged inside the mixing cylinder, and a gap is arranged at the position of a contact surface between the baffle and the cylinder in front of the discharge hole. Compared with the prior art, the horizontal solid-liquid mixing device can fully mix two phases of solid and liquid within a short time, has high mixing efficiency, low energy consumption and even material mixing, does not produce 'powder balls' generated by mixing the powder and the liquid, is good in continuous operation effect and can be widely applied to industries such as petroleum, chemical industry, coal chemical industry, food, medicine, etc.
Owner:SHANGHAI RES INST OF CHEM IND +1

Advanced treatment process of coal chemical industry wastewater

The invention relates to an advanced treatment process and device of coal chemical industry wastewater. The process comprises the following steps: removing oil, performing deacidification and deamination, performing centrifugal extraction and dephenolization, performing catalytic wet oxidation and performing biochemical treatment. The device comprises an oil removal pool, a deacidification and deamination regulating reservoir, an ammonia still, a high speed centrifuge, a catalytic wet oxidation regulating reservoir, a catalytic wet oxidation tower, a biochemical regulating reservoir and an A/O biochemical system which are connected with one another sequentially. The indirect emission standard requirements in the national coking chemical industrial pollutant discharge standard (GB16171-2012) can be met after main pollutants such as chemical oxygen demand (COD), oil, ammonia nitrogen and phenol in coal chemical industry wastewater are treated, and ammonia water and crude phenol can be recovered. Compared with the prior art, the advanced treatment process of coal chemical industry wastewater has the beneficial effects that sewage produced in coal chemical industry is treated with a clear target on the basis of characteristics of the coal chemical industry production process, so that the indirect emission standard requirements are met, available resources in the sewage are recovered, and sewage resource treatment is really realized.
Owner:SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD

Process for treating coal chemical waste water

The invention relates to a process for treating coal chemical waste water, wherein a method combining active material adsorption and biochemical treatment is adopted. The method comprises the following steps of: firstly, introducing coal chemical waste water in a waste water regulating reservoir; secondly, introducing the waste water subjected to adsorption treatment by an adsorption tank into a clarification reservoir for sedimentation; then introducing the waste water subjected to the treatment of the clarification reservoir into a biochemical unit for biochemical treatment; and finally, introducing the waste water subjected to the biochemical treatment into a sedimentation reservoir for sedimentation treatment. In the technical scheme, macromolecular organic pollutants are removed through adsorption, therefore, the requirement of the subsequent biochemical treatment is met, and the problems of insufficient utilization of pores of activated carbon and incomplete exertion of the adsorbability of the activated carbon due to the influence of sludge when the activated carbon is added into an activated sludge aeration tank in the prior art are solved; and the process for treating coal chemical waste water has high efficiency and can sufficiently utilize the pores of the activated carbon and ensure the full exertion of the adsorbability of the activated carbon.
Owner:北京国能普华环保工程技术有限公司 +1

Preparation method of catalyst for catalyzing ozonation for advanced treatment of coal chemical wastewater

The invention discloses a preparation method of a catalyst for catalyzing ozonation for advanced treatment of coal chemical wastewater and relates to a preparation method for the catalyst. The preparation method is used for solving the technical problems that the existing ozonation method is poor in ozone water solubility and low in degradation rate, successfully applied to the advanced treatment of the coal chemical wastewater, and capable of removing the degradation-resistant hazardous substances in water, improving the biodegradability of the wastewater and enabling the quality of the outlet water to reach the first-grade national emission standards. The preparation method comprises the following steps of: firstly, washing active carbon particles; secondly, soaking the active carbon in a metal nitrate solution, shaking for mixing and reacting, and taking out the active carbon 12 hours later; and thirdly, drying the active carbon and putting the dried active carbon to a muffle furnace, heating the muffle furnace to 200 DEG C by adopting nitrogen gas as the protective gas, roasting for one hour, continuing heating the muffle furnace to 600 DEG C and roasting for 3 hours at 600 DEG C to obtain the catalyst for treating the coal chemical wastewater. By using the catalyst prepared by the preparation method disclosed by the invention, the utilization rate of ozone is greatly improved, and the catalyst is very suitable for the field of coal chemical wastewater treatment.
Owner:HARBIN INST OF TECH

Method for coal hydrogenation pyrolysis and gasification coupling

The invention discloses a method for coal hydrogenation pyrolysis and gasification coupling, comprising the steps of: drying and preheating raw material coal with granularity less than or equal to 2mm in a coal drying and preheating system; putting 60-80% of the dried and preheated raw material coal in a coal hydrogenation pyrolysis furnace to carry out coal hydrogenation pyrolysis; putting a pyrolyzed gas-phase product in a pyrolyzed gas purification and separation system to carry out separation; putting all the semicoke generated by the coal hydrogenation pyrolysis furnace in a coke hydrogenation gasification furnace to carry out hydrogenation gasification; putting a gasified gas-phase product in a gasified gas purification and separation system; and causing 20-40% of the dried and preheated raw material coal and high-temperature coke granules from the coke hydrogenation gasification furnace to enter a hydrogen-rich generator from upper and lower paths under the combined action of oxygen and a water vapor mixed gasification agent so as to carry out gasification reaction. The coal hydrogenation pyrolysis, semicoke hydrogenation gasification and coke granule hydrogen production are combined; therefore, the tar yield and the light component content are effectively improved and methane-rich pyrolyzed gas, gasified gas and coal chemical products such as naphthalene, benzene, phenol and the like with high added value can be obtained.
Owner:北京锦泰诚瑞科技发展有限公司
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