CN102899111B - A kind of method being produced gasification slip by trade effluent and coke powder - Google Patents
A kind of method being produced gasification slip by trade effluent and coke powder Download PDFInfo
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- CN102899111B CN102899111B CN201210429540.2A CN201210429540A CN102899111B CN 102899111 B CN102899111 B CN 102899111B CN 201210429540 A CN201210429540 A CN 201210429540A CN 102899111 B CN102899111 B CN 102899111B
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Abstract
The present invention relates to the method utilizing trade effluent and coke powder to prepare gasification slip, the method comprises Waste Water Analysis and pre-treatment, coke powder fragmentation and processes trade effluent, broken coke powder and auxiliary agent carries out wet-milling and obtains the steps such as slip that gasify.Trade effluent organic substance not only reduces the usage quantity of slip additive, promote slurrying concentration, simultaneously wherein the useful element such as C, H improves the gasification performance indexes of slip, and waste water of the present invention is BOD≤500mg/l, COD≤260mg/l, greatly reduces cost for wastewater treatment and difficulty.The present invention has widened the source of gasification pulping raw material, reduce slurrying cost, gasification phosphoric acid prepared by simultaneously the present invention is moderate, good stability, good fluidity, be easy to pumping, directly can use on existing wet entrained flow bed gasifying apparatus, have good development prospect.
Description
[technical field]
The invention belongs to Coal Gasification Technology field.More specifically, the present invention relates to a kind of method being produced gasification slip by trade effluent and coke powder.
[background technology]
Wet entrained flow bed gasification technology is the technology that slip and pure oxygen be waste synthetic gas that gasifies, and is an environmental protection, efficient, energy-conservation Coal Gasification Technology.Wet entrained flow bed gasification technology is utilized to produce main component for CO and H
2synthetic gas in order to produce synthetic ammonia, methyl alcohol and some derived product, therefore, this technology occupies an important position in national product activity.At present, the gasification slip in wet entrained flow bed gasification technology obtains primarily of coal dust, fresh water and the wet-milling in grinding machine of a small amount of auxiliary agent, and wherein coal accounts for 55 ~ 68% by weight, and water accounts for 32 ~ 45%.According to statistics, China about has 60 at present overlaps wet entrained flow bed gasifying apparatus in steady running, all needs every year to consume a large amount of coals and fresh water.
China is the country of a shortage of water resources, and distribution of water resources is uneven.At present, in China more than 600 city, more than 400 lack of water, wherein more than 100 serious water shortage, water saving, rational utilization of water resources will become the theme of future development.Due to the fast development of China's economy, the development of the industry such as drive China oil refining, chemical industry, dye to spin, these industries can produce a large amount of industrial sewages in process of production, these trade effluents contain a large amount of organism and inorganics, COD, BOD content is all very high, these trade effluents not only not easily purify, and process is also more difficult.And although existing process for treating industrial waste water achieves some achievements, there is running cost high, the defect of fluctuation of service, thus there are some problems in large-scale promotion application.Owing to lacking cost-effective treatment technology, the waste water of generation is directly drained into terminal Sewage treatment systems by a lot of enterprise, the normal running of this treatment system is caused to be affected, become the important factor that sewage disposal is for a long time not up to standard, even indivedual enterprise, by direct discharging of waste water, causes serious problem of environmental pollution.
Coke powder is the small-particle coke that coke shattering process produces, and its physical and chemical performance and large lump coke there is no much difference.But the granularity of coke powder is difficult to meet manufacturing technique requirent, can not directly utilize, thus the generation of coke powder will reduce the utilization ratio of coke.At present, China's great majority because not finding the way of Appropriate application coke powder, make the outdoor accumulation of most of coke powder with burnt enterprise, expose to the weather, fly upward everywhere, severe contamination environment, directly have influence on work and the life of production plant area and surrounding resident, be detrimental to health.Even if some enterprise utilizes coke powder be also just used as the process of conventional fuel cheapness, reduce the economic worth of coke powder, cause a large amount of energy dissipations, harm is caused to environment simultaneously.
Being that preparation gasification slip needs a large amount of fresh waters and feed coal on the one hand, is that a large amount of trade effluents and coke powder are not fully utilized on the other hand.Develop a kind of method utilizing trade effluent and coke powder to produce gasification slip, trade effluent and pulverized coke instead fresh water and coal is utilized to produce gasification slip, while comprehensive regulation coke powder and industrial wastewater pollution problem, reduce former the consumption of coal, good economic benefit and social benefit can be created.
[summary of the invention]
[technical problem that will solve]
The object of this invention is to provide a kind of method being produced gasification slip by trade effluent and coke powder.
[technical scheme]
The present invention is achieved through the following technical solutions.
The present invention relates to a kind of method being produced gasification slip by trade effluent and coke powder.
The step of this gasification Pulp preparation method is as follows:
A, Waste Water Analysis and pre-treatment
Described trade effluent carries out colourity, turbidity, BOD, COD, pH value, solid substance, organism or inorganic content analysis, then the solid content of described trade effluent is adjusted to described trade effluent total weight less than 30%, again the pH value of described trade effluent is adjusted to 7 ~ 9, obtains a kind of process trade effluent;
B, coke powder use disintegrating apparatus to carry out fragmentation, obtain a kind of granularity and 100% are less than the broken coke powder that 1.4mm, 40 ~ 55% is less than 0.076mm by weight;
The broken coke powder that C, process trade effluent steps A obtained, step B obtain and auxiliary agent add in grinding plant and carry out wet-milling, obtain described gasification slip;
The weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 32 ~ 45,55 ~ 68 and 0.1 ~ 0.5;
Described auxiliary agent is pH value regulator, fusing assistant and additive.
A preferred embodiment of the invention, described trade effluent is that one or more are selected from the trade effluent of paper waste, dyeing waste water, sewage from oil refinery or pharmaceutical factory waste water.
According to another kind of preferred implementation of the present invention, the solid content of described trade effluent is with described trade effluent total weight less than 20%.
According to another kind of preferred implementation of the present invention, when described trade effluent contains hydrophobic oil substances, heating is needed to carry out heating power breakdown of emulsion, to reach the dispersiveness of described coke powder in water and stability.
According to another kind of preferred implementation of the present invention, described coke powder is that one or more are selected from the coke powder of high temperature pyrolysis coke powder, low temperature pyrogenation coke powder or petroleum coke powder; The granularity of described coke powder 100% is less than 20mm by weight, index HGI can be ground be >=50.
According to another kind of preferred implementation of the present invention, the weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 35 ~ 40,60 ~ 65 and 0.2 ~ 0.35.
According to another kind of preferred implementation of the present invention, described pH value regulator is alkaline pH adjuster or acid ph value conditioning agent;
Described alkaline pH adjuster is that one or more are selected from the alkaline pH adjuster of sodium hydroxide, sodium carbonate or ammoniacal liquor;
Described acid ph value conditioning agent is that one or more are selected from the acid ph value conditioning agent of ferrous sulfate, hydrochloric acid, sulfuric acid or nitric acid.
According to another kind of preferred implementation of the present invention, described fusing assistant is selected from silicon-dioxide, calcium oxide or calcium carbonate.
According to another kind of preferred implementation of the present invention, described additive is anionic dispersing agent or Anionic-nonionic Compositional type additive;
Described anionic dispersing agent is that one or more are selected from the dispersion agent of sodium lignosulfonate, calcium lignin sulphonate, polycondensation sodium naphthalene sulfonate, high polymerization sodium naphthalene sulfonate or non-gluey high phosphorus china clay;
Described Anionic-nonionic Compositional type additive is made up of according to its weight ratio 1:2 ~ 4 sulfonated lignin and oxyethane and propylene oxide block copolymer.
The invention still further relates to the gasification slip adopting aforesaid method to obtain.
Described gasification slip has following performance: rheological is yield pseudoplasticity, stability 2.0 ~ 3.0%, static 7 days without obvious sediment, apparent viscosity be 1100 ~ 1180mPa.s, mobility 13.0 ~ 16.0, pH value be 7.0 ~ 9.0.
In more detail the present invention will be described below.
The present invention relates to a kind of method being produced gasification slip by trade effluent and coke powder.
The step of this gasification Pulp preparation method is as follows:
A, Waste Water Analysis and pre-treatment
Described trade effluent carries out colourity, turbidity, BOD, COD, pH value, solid substance, organism or inorganic content analysis, then the solid content of described trade effluent is adjusted to described trade effluent total weight less than 30%, again the pH value of described trade effluent is adjusted to 7 ~ 9, obtains a kind of process trade effluent.
In the present invention, described trade effluent can be acid or alkaline industrial waste water, and can be oily(waste)water, also can be the trade effluent that BOD, COD content is very high, and its BOD content can more than 10000mg/l more than 2000mg/l, COD content.In the present invention, described trade effluent is such as that one or more are selected from the trade effluent of paper waste, dyeing waste water, sewage from oil refinery or pharmaceutical factory waste water.
The waste water that the present invention uses is that chemical composition is very complicated, the trade effluent that BOD, COD content is very high.Therefore, these trade effluents need to carry out detailed analysis before use, comprising colourity, turbidity, BOD, COD, pH value analysis, solid substance, organism, inorganic content measure, and these analysis projects are all carry out Sequencing and analysis according to the current art standard of national regulation.
In the present invention, the analysis project that above-mentioned analysis project is normally main, but, sometimes other correlation analysis project also should be increased according to wastewater source and practical situation, to guarantee that subsequent technique process can be carried out smoothly, prepare the gasification slip conforming with follow-up gasifying process requirement, this is apparent for a person skilled in the art.
The trade effluent collected generally all needs to carry out pre-treatment and could use further.Pretreated Main Function is the solid contents of the large granular impurity removed in trade effluent, adjustment trade effluent pH, adjustment trade effluent.
May the various solid matter such as rock particles, metal fragment be contained in various different trade effluent, therefore need to filter these solid matters before slurrying., consider from oar technique processed and economic aspect meanwhile, the solid matter content in these waste water can be controlled on certain level, usually the solids content of these trade effluents is controlled with trade effluent total weight less than 30%.
Preferably, the solids content of these trade effluents controls with trade effluent total weight less than 20%.
More preferably, the solids content of these trade effluents controls with trade effluent total weight less than 15%.
Then, described trade effluent also need to carry out modifying process could as slurrying water.In the present invention, so-called upgrading should be appreciated that it is regulate its pH and eliminate emulsion.
Regulate pH Neutralization of Industrial Wastewater to make the pH value of slip within the zone of reasonableness of 7-9, and pH value control method is method well known to those skilled in the art.
Next step determines the need of carrying out breakdown of emulsion process according to wastewater through organic matter component, as the waste lye in refining of petroleum products process contains petroleum-type naphthenic acid and organic phenols, need first to heat and carry out heating demulsification type, affect the dispersiveness of coke powder in water and stability to eliminate hydrophobicity oil substances in waste water.Described heating demulsification type is the conventional demulsification technology of one of this area, and selecting type of heating to carry out heating demulsification type as the case may be to those skilled in the art should without any difficulty.
B, the coke powder using disintegrating apparatus can grind index HGI >=50 carry out fragmentation, obtain a kind of granularity 100% broken coke powder being less than 20mm by weight;
Described coke powder is that one or more are selected from the coke powder of high temperature pyrolysis coke powder, low temperature pyrogenation coke powder or petroleum coke powder.They are all the coke powder products sold in the market.
Usually, also need to carry out fragmentation from the coke powder obtained in the market can use.Needed, with the iron that may exist in magnet removing coke powder, then to utilize disintegrating apparatus to carry out fragmentation before carrying out fragmentation, the coke fines size obtained 100% is less than 20mm by weight.
Preferably, the granularity of described coke powder 100% is less than 15mm by weight.
More preferably, the granularity of described coke powder 100% is less than 10mm by weight.
The disintegrating apparatus that the present invention uses is the impact breaker that slurrying field is commonly used, the crusher that such as Shanghai Yuan Hua Machinery Manufacturing Co., Ltd. sells with impact breaker trade(brand)name with impact breaker trade(brand)name or mining and metallurgy company of great Santex Group with impact breaker trade(brand)name, Shanghai Shi Bang manufacture company limited.
Kazakhstan can grind the important indicator that index HGI is the grindability index of reflection coal.The grindability index of coal is a kind of hardness with coal, intensity, the toughness overall physical characteristics relevant with brittleness, relevant with age of coal, lithostructure, colliery type and distribution etc.Current conventional Hardgrove grindability index HGI in the world weighs the grindability index of coal, and HGI is a nondimensional physical quantity, and the size of its value reflects the relative ease that different coal sample reduction becomes powder.HGI value is larger, illustrates that, under the condition consuming certain energy, the fineness that the coal sample of identical amount designated size grinds into powder is thinner.
Preferably, the coke powder that the present invention uses can grind index HGI >=55.
More preferably, the coke powder that the present invention uses can grind index HGI >=60.
The broken coke powder that C, process trade effluent steps A obtained, step B obtain and auxiliary agent add in grinding plant and carry out wet-milling, obtain described gasification slip;
In the present invention, described auxiliary agent is pH value regulator, fusing assistant and additive.
The weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 32 ~ 45,55 ~ 68 and 0.1 ~ 0.5;
Preferably, the weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 35 ~ 40,60 ~ 65 and 0.2 ~ 0.35.
More preferably, the weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 36 ~ 38,62 ~ 64 and 0.25 ~ 0.30.
Described pH value regulator should be appreciated that it is a kind of material with the effect of adjustment slip pH value.In the present invention, the pH value of described gasification slip needs to control 7.0 ~ 9.0, therefore generally uses alkaline pH adjuster or acid ph value conditioning agent to control the pH value of its gasification slip.
In the present invention, described pH value regulator is alkaline pH adjuster or acid ph value conditioning agent.
Described alkaline pH adjuster is that one or more are selected from the alkaline pH adjuster of sodium hydroxide, sodium carbonate or ammoniacal liquor.
Described acid ph value conditioning agent is that one or more are selected from the acid ph value conditioning agent of ferrous sulfate, hydrochloric acid, sulfuric acid or nitric acid.
Those skilled in the art according to the acid of described process trade effluent, basicity situation, can be easy to determine to be select alkaline pH adjuster, or the acid ph value conditioning agent described in selecting.
In the present invention, described fusing assistant should be appreciated that it is a kind ofly can reduce material of the present invention and soften, melt or the material of liquefaction temperature, and conventional fusing assistant has silicon-dioxide, calcium oxide or calcium carbonate etc.
Those skilled in the art is according to the ash oontent of used coke powder and can be determined the add-on of described fusing assistant by normal experiment, and the addition of described fusing assistant is generally 5 ~ 20% of ash oontent.
In the present invention, described additive should be appreciated that it is a kind of material having reduction phosphoric acid, improve mud dispersivity performance, strengthen slip mobility.Described additive can be anionic or Anionic-nonionic Compositional type slip additive.
Described anionic additive is that one or more are selected from the additive of sodium lignosulfonate, calcium lignin sulphonate, polycondensation sodium naphthalene sulfonate, high polymerization sodium naphthalene sulfonate or non-gluey high phosphorus china clay.
Preferably, described anionic additive is that one or more are selected from the additive of sodium lignosulfonate, calcium lignin sulphonate, high polymerization sodium naphthalene sulfonate or non-gluey high phosphorus china clay.
More preferably, described anionic additive is that one or more are selected from the additive of sodium lignosulfonate, calcium lignin sulphonate or non-gluey high phosphorus china clay.
The anionic additive that the present invention uses is all product sold in the market, such as sodium lignosulfonate, calcium lignin sulphonate are Xinyi City of Jiangsu Province Fei Huang products that Chemical Co., Ltd. sells, and non-gluey high phosphorus china clay is that Tangxian County, Baoding Bao Yi mining industry company limited sells product.
Described Anionic-nonionic Compositional type slip additive is made up of according to its weight ratio 1:2 ~ 4 sulfonated lignin and oxyethane and propylene oxide block copolymer.Described sulfonated lignin are selected from sodium lignosulfonate, calcium lignin sulphonate, polycondensation sodium naphthalene sulfonate or high polymerization sodium naphthalene sulfonate.The oxyethane that the present invention uses and propylene oxide block copolymer are product solds in the market, the oxyethane that such as Guangzhou Bi Sheng trade Co., Ltd sells and propylene oxide block copolymer product.
In the present invention, the amount of described additive tests according to the pulping of coke powder and waste water to determine, is usually with described gasification slip total weight 0.1-0.5%.
Described grinding machine is normally used in the art grinding machine, the grinding machine that such as Zhong Xin heavy industry company limited, Jiangsu Jiang Qiulin heavy industry limited liability company sell with ball mill trade(brand)name with rod mill trade(brand)name or Shenyang Nonferrous Metallurgical Machinery Plant company with rod mill trade(brand)name, Shenyang Heavy Machinery Group Limited Liability Company.
In order to make the rational size distribution of coke powder in gasification slip, various granularity is filled mutually, improve coke powder slurrying concentration to greatest extent, need to select rational grinding body gradation ratio according to coke powder kind transitivity in pulping process, namely rational steel ball matching selected by ball mill, and rational frotton proportioning selected by rod mill.Those skilled in the art can, by the rational steel ball matching of test and Selection or rational frotton proportioning, make the size-grade distribution of its coke powder meet following requirement.
In gasification slip, the size distribution requirements of coke powder is as follows:
In the present invention, should reach 100% at grinding machine outlet coke fines size and be less than 1.4mm, 40 ~ 55% are less than 0.076mm.
Adopt the gasification slip for preparing of the inventive method to have following performance: rheological is yield pseudoplasticity, stability 2.0 ~ 3.0%, static 7 days without obvious sediment, apparent viscosity be 1100 ~ 1180mPa.s, mobility 13.0 ~ 16.0, pH value be 7.0 ~ 7.5.
Described rheological refers to the gasification viscosity of slip and the shear-stress Changing Pattern with shearing rate, and the rheological in the present invention adopts rheometer to measure.
Described stability refers to that gasification slip keeps the uniform ability of condition in transport and storage process, and the stability in the present invention adopts static observation method to measure with reference to GB/T18856.5-2008.
Described apparent viscosity refers to the viscosity of gasification slip under shearing rate is 100S-1, and the apparent viscosity in the present invention adopts coaxial cylinders rotary viscosity design determining with reference to GB/T18856.4-2008.
Described mobility is a parameter of reflection gasification slurry pipeline transport complexity, and the mobility in the present invention adopts funnel method to measure.
The gasification slip adopting the inventive method to prepare is flowed in slip storage tank by pipeline after mill trommel removing macrobead.In order to prevent gassiness material from starching precipitation, keep gasification slip uniform and stable, slip storage tank arranges slip agitator, and the agitator that the present invention uses is mechanical stirrer, such as three-vane agitator or quaterfoil formula agitator.Then the gasification slip in slip storage tank passes through high-pressure slurry pumping toward reactor, gasification slip carries out being obtained by reacting crude synthesis gas with vaporized chemical in the reactor, synthetic gas is sent to next unit after scrubbing dust collection, the gasification Heisui River produced retrieval system after precipitation clarification uses, for keeping system intermediate ion balance, need toward discharge unit waste water in Waste Water Treatment.
[beneficial effect]
The present invention has following beneficial effect:
1, the trade effluent that the present invention utilizes environmental pollution serious carries out slurrying, utilizes these reluctant waste water of wet method gasification technology process, not only saves the production cost of enterprise, also reach the object turned waste into wealth simultaneously; And existing pulping process generally adopts fresh water, while wasting valuable water resources, increase the production cost of enterprise.
2, be that the waste slip that gasifies is different with coal from traditional, pulping raw material of the present invention selects coke powder, not only widen the available sources of pulping raw material, reduce the dependence to feed coal, reduce the environmental pollution caused because of exploitation colliery, solve the problem that each coke powder use value producing coke powder enterprise is low simultaneously, adopt the inventive method that coke powder usually can be made to rise in value and reach 30% ~ 45%.
3, trade effluent and coke powder is utilized to produce gasification slip, through grinding the slip produced, there is modest viscosity, good stability, the advantages such as good fluidity, are conducive to the pumping of gasification slip, Cemented filling, safety storing and spray burning, are applicable to very much using in wet entrained flow bed gasifying apparatus.
4, the complicated and existing complex treatment process of trade effluent that BOD, COD value are very high of component and cost is very high, these waste water discharge by such as not treated or not up to standard the carrying out of process, very big to environmental hazard.But after adopting the inventive method trade effluent and coke powder to be made gasification slip, the elements such as C, H, O of containing in trade effluent are fully utilized at gasification reaction unit, and the Heisui River that gasification unit produces, after grey water handing unit, only produces a small amount of efflux wastewater.Test COD in this part efflux wastewater via many covering devices and be down to 500 ~ 1000ppm, BOD is down to 200 ~ 500ppm, and this wastewater treatment is easy, flow process simple, compared with existing cost for wastewater treatment, adopts processing cost of the present invention to reduce about 70 ~ 80%.
Generally speaking, the present invention is by the various reluctant waste water produced in industrial production and use the low coke powder of value added to carry out Appropriate application, turn waste into wealth, while the good economic return of acquisition, realize eco-friendly object, for Environmental Protection in China and sustainable economic development cause contribute.
[embodiment]
The present invention can be understood better by following embodiment.
Embodiment 1: produce gasification slip by trade effluent and coke powder
The present embodiment selects waste water to be that waste water is discharged in certain paper mill, adopts its waste water quality of Conventional waste water analytical in table 1.
Table 1: waste water quality is discharged in paper mill
The coke powder that the present embodiment uses is Anqing refinery coke 1# coke powder, adopts conventional coke powder analytical coke powder constituent content to list in table 2.
Table 2: coke powder ultimate analysis
The auxiliary agent that the present embodiment uses is lignosulfonic acid sodium additives, silicon-dioxide fusing assistant, sodium hydroxide pH value regulator, and its amount is 0.4kg/h, 0kg/h, 0.1kg/h respectively.
Use the disintegrating apparatus sold with impact breaker trade(brand)name of Shanghai Yuan Hua Machinery Manufacturing Co., Ltd. that above-mentioned coke powder is carried out fragmentation, obtain a kind of granularity 100% broken coke powder being less than 20mm by weight.
Be 100kg/h to pulverize coke powder amount, above-mentioned wastewater flow for 72kg/h, above-mentioned amount of auxiliary is that 0.5kg/h adds in the grinding machine that Shenyang Nonferrous Metallurgical Machinery Plant company sells with ball mill trade(brand)name and carries out wet-milling, obtains described gasification slip.The slip flow of preparation is 172.9kg/h, and the concentration adopting infrared drying method to measure slurry is with described slurry total weight 58%.
Adopt the method illustrated in present specification to determine the performance of obtained slurry, consequently rheological is yield pseudoplasticity, stability 2.8%, and within static 7 days, without obvious sediment, apparent viscosity is 1107mPa.s(D=15.89s
-1), mobility 13.1, pH value is 7.3.
Known by data above, with the slip that Anqing refinery coke 1# coke powder and paper-making effluent are produced, there is satisfactory stability and mobility, be suitable as wet method gasified raw material.
The gasification slip using the present embodiment to prepare carries out gasification test according to method disclosed in ZL200810132975.4, and it the results are shown in table 3:
Table 3: gasification test result
The result of table 3 clearly illustrates that and utilizes paper mill discharge waste water and coke powder can prepare qualified gasification slip, and this gasification slip possesses good gasification performance, and its efficiency of carbon conversion is high, effective gas (CO+H in synthetic gas
2) content is higher, cold gas efficiency is higher, than oxygen consumption, and feature more good than coal consumption.
Embodiment 2: produce gasification slip by trade effluent and coke powder
The present embodiment carries out according to the mode identical with embodiment 1, but the present embodiment selects waste water to be the organic waste water that certain chemical plant is discharged, and adopts its waste water quality of Conventional waste water analytical in table 4.
Table 4: Organic Chemical Plant discharges waste water quality
The coke powder that the present embodiment uses is Anqing refinery coke 2# coke powder, adopts conventional coke powder analytical coke powder constituent content to list in table 5.
Table 5: coke powder ultimate analysis
Additive, ferrous sulfate pH value regulator, calcium carbonate fusing assistant that the auxiliary agent that the present embodiment uses is made up of according to its weight ratio 1:3 with oxyethane and propylene oxide block copolymer sodium lignosulfonate, its amount is 0.38kg/h, 0kg/h, 0.12kg/h respectively.
Use the disintegrating apparatus sold with impact breaker trade(brand)name of Shanghai Yuan Hua Machinery Manufacturing Co., Ltd. that above-mentioned coke powder is carried out fragmentation, obtain a kind of granularity 100% broken coke powder being less than 20mm by weight.
Be 100kg/h to pulverize coke powder amount, above-mentioned wastewater flow for 67kg/h, above-mentioned additive capacity is that 0.5kg/h adds in the grinding machine that Shenyang Nonferrous Metallurgical Machinery Plant company sells with ball mill trade(brand)name and carries out wet-milling, obtains described gasification slip.The slip flow of preparation is 167.2kg/h, and the concentration adopting infrared drying method to measure slurry is with described slurry total weight 60%.
Adopt the method illustrated in present specification to determine the performance of obtained slurry, consequently rheological is yield pseudoplasticity, stability 2.0%, and within static 7 days, without obvious sediment, apparent viscosity is 1164.1mPa.s(D=15.89s
-1), mobility 15.3, pH value is 7.3.
Known by data above, use Anqing refinery coke, the slip that 2# coke powder and chemical plant organic waste water are produced has satisfactory stability and mobility, is suitable as wet method gasified raw material.
The gasification slip using the present embodiment to prepare carries out gasification test according to method disclosed in ZL200810132975.4, and it the results are shown in table 6:
Table 6: gasification test result
The result of table 6 clearly illustrates that the gasification slip utilizing organic waste water and coke powder can prepare higher concentration, and this gasification slip possesses good gasification performance, and its efficiency of carbon conversion is high, effective gas (CO+H in the synthetic gas of generation
2) content is high, cold gas efficiency is high, lower than oxygen consumption, the advantage lower than coal consumption.
Embodiment 3: produce gasification slip by trade effluent and coke powder
This embodiment is implemented according to the mode identical with embodiment 1, just select waste water be certain pharmaceutical factory discharge organic waste water, above-mentioned wastewater flow is 47.5kg/h, waste water quality in table 7; Select coke powder to be pyrolysis coke powder, pulverizing coke powder amount is 100kg/h, and coke powder constituent content lists in table 8; Amount of auxiliary is 0.8kg/h, and described auxiliary agent is lignosulfonic acid sodium additives, silicon-dioxide fusing assistant, sodium hydroxide pH value regulator, and its amount is 0.25kg/h, 0.6kg/h, 0.05kg/h respectively.
Table 7: certain pharmaceutical factory discharges waste water quality
Table 8: coke powder ultimate analysis
The gasification slip using the present embodiment to prepare carries out gasification test according to method disclosed in ZL200810132975.4, and it the results are shown in table 9:
Table 9: gasification test result
The result of table 9 clearly illustrates that, the waste water in pharmaceutical plants that the solid contents such as C, H are higher and coke powder can prepare the gasification slip of high density, and this gasification slip possesses good gasification performance, and its efficiency of carbon conversion is high, effective gas (CO+H in the synthetic gas of generation
2) content is high, cold gas efficiency is high, lower than oxygen consumption, the advantage lower than coal consumption.
Embodiment 4: produce gasification slip by trade effluent and coke powder
This embodiment is implemented according to the mode identical with embodiment 1, and it selects waste water to be the waste water that certain printing and dyeing mill discharges, and above-mentioned wastewater flow is 81.0kg/h, and waste water quality is in table 10; Select coke powder to be semicoke, pulverizing coke powder amount is 100kg/h, and coke powder constituent content lists in table 11; Amount of auxiliary is 0.5kg/h, and described auxiliary agent is lignosulfonic acid sodium additives, silicon-dioxide fusing assistant, sodium hydroxide pH value regulator, and its amount is 0.4kg/h, 0kg/h, 0.1kg/h respectively.
Table 10: printing and dyeing mill discharges waste water quality
Table 11: coke powder ultimate analysis
The gasification slip using the present embodiment to prepare carries out gasification test according to method disclosed in ZL200810132975.4, and it the results are shown in table 12:
Table 12: gasification test result
The result of table 12 clearly illustrates that and utilizes dyeing waste water and coke powder can prepare qualified gasification slip, and this gasification slip possesses good gasification performance, but due to slurrying concentration medium on the low side, effective gas (CO+H in the synthetic gas of generation
2) content is lower, cold gas efficiency is lower, medium more higher than oxygen consumption, and lower than coal consumption is medium higher.
Claims (7)
1. produced a method for gasification slip by trade effluent and coke powder, it is characterized in that the step of the method is as follows:
A, Waste Water Analysis and pre-treatment
Described trade effluent carries out colourity, turbidity, BOD, COD, pH value, solid substance, organism or inorganic content analysis, and described trade effluent is that one or more are selected from the trade effluent of paper waste, dyeing waste water, sewage from oil refinery or pharmaceutical factory waste water; Then the solid content of described trade effluent is adjusted to described trade effluent total weight less than 30%, then the pH value of described trade effluent is adjusted to 7 ~ 9, obtain a kind of process trade effluent;
B, the coke powder using disintegrating apparatus can grind index HGI >=50 carry out fragmentation, obtain a kind of granularity 100% broken coke powder being less than 20mm by weight; Described coke powder is that one or more are selected from the coke powder of high temperature pyrolysis coke powder, low temperature pyrogenation coke powder or petroleum coke powder; The broken coke powder that C, process trade effluent steps A obtained, step B obtain and auxiliary agent add in grinding plant and carry out wet-milling, obtain described gasification slip;
The weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 32 ~ 45:55 ~ 68:0.1 ~ 0.5;
Described auxiliary agent is pH value regulator, fusing assistant and additive;
Described pH value regulator is alkaline pH adjuster or acid ph value conditioning agent;
Described additive is anionic dispersing agent or Anionic-nonionic Compositional type additive.
2. method according to claim 1, is characterized in that the solid content of described trade effluent is with described trade effluent total weight less than 20%.
3. method according to claim 1, when it is characterized in that described trade effluent contains hydrophobic oil substances, needs heating to carry out heating power breakdown of emulsion, to reach the dispersiveness of described broken coke powder in water and stability.
4. method according to claim 1, is characterized in that the weight ratio of described process trade effluent, broken coke powder and auxiliary agent is 35 ~ 40:60 ~ 65:0.2 ~ 0.35.
5. method according to claim 1, is characterized in that described alkaline pH adjuster is that one or more are selected from the alkaline pH adjuster of sodium hydroxide, sodium carbonate or ammoniacal liquor;
Described acid ph value conditioning agent is that one or more are selected from the acid ph value conditioning agent of ferrous sulfate, hydrochloric acid, sulfuric acid or nitric acid.
6. method according to claim 1, is characterized in that described fusing assistant is selected from silicon-dioxide, calcium oxide or calcium carbonate.
7. method according to claim 1, is characterized in that
Described anionic dispersing agent is that one or more are selected from the dispersion agent of sodium lignosulfonate, calcium lignin sulphonate, polycondensation sodium naphthalene sulfonate, high polymerization sodium naphthalene sulfonate or non-gluey high phosphorus china clay;
Described Anionic-nonionic Compositional type additive is made up of according to its weight ratio 1:2 ~ 4 sulfonated lignin and oxyethane and propylene oxide block copolymer.
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