CN103776037A - High-concentration organic waste innocent treatment system and process - Google Patents
High-concentration organic waste innocent treatment system and process Download PDFInfo
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Abstract
The invention provides a high-concentration organic waste innocent treatment system and process. High-concentration organic waste discharged from industrial production is mixed with coal slime or fine particle clean coal to proportionally produce coal water slurries, the water content of the coal water slurries is controlled through a slurry ability experiment, and a coal water slurry plunger pump is used to continuously and stably convey the coal water slurries to a circulating fluidized bed boiler for burning to produce superheated steam for comprehensive utilization of enterprises, so that effects of energy conservation and environmental protection are achieved. Combustion tail gases are subjected to desulfurization, denitrification and dedusting through a flue gas cleaning system and discharged until the combustion tail gases meet the requirement of environment protection, and ashes left in the production process can be used as building materials or brick-making raw materials. According to the high-concentration organic waste innocent treatment system and process, the high-concentration organic waste discharged from industrial production and coal slime or fine particle clean coal is used as raw materials of the coal water slurries, and by means of a water coal slurry clean combustion technology, the high-concentration organic waste is used as production water for the water coal slurries, so that treatment costs of high-concentration organic waste and waste water are saved, industrial production waste is absorbed, and production costs of enterprises are reduced.
Description
Technical field
The present invention relates to method and the device of a kind of environmental protection and energy-saving field, be specifically related to a kind of high concentration debirs innocuity disposal system and technique thereof.
Background technology
High concentration debirs (comprising waste water, waste liquid, waste residue and various mud) are mainly from industries such as coking, papermaking, fermentation, medicine, food and leather rubber, textile printing and dyeing, petrochemical industries, especially the debirs of high concentration difficult for biological degradation, easily cause environmental pollution, human health and social sustainable development are constituted a threat to.Along with the quickening of process of industrialization, all trades and professions high concentration debirs discharge capacity is also continuing to increase, even through certain processing, still can produce certain harmfulness to environment after discharge.Typical high concentration debirs " minimizing, resource, the innoxious " processing mode of processing is to burn, but because high concentration debirs water content is high, calorific value is low, only relies on the heat of self to be difficult to maintain completing combustion, need to take combustion-supporting measure; For high concentrated organic wastewater, traditional biochemical processing process investment is large, cost is high, is also seriously restricting operation and the development of enterprise.China Patent No. 201210039460.6 adopts " efficient biochemical+Special Resin absorbs " technical finesse coking chemical waste water, treatment scale 10000m
3/ d, construction investment volume reaches 1,400 ten thousand yuan, and direct operating cost is at 0.5 yuan/m
3.China Patent No. 93209804 proposes organic waste liquid fluidized bed incinerator, adopts fluidized bed combustion mode to process organic liquid waste, but will, take coal as auxiliary fuel, increase processing cost, also consumes non-renewable energy resources.Dispatch from the factory moisture percentage in sewage sludge conventionally up to more than 80%, existing burning disposal mode is that first mummification is to moisture content 40%, enter again fluidized bed incinerator processing, though adopt better economy " " PROCESS FOR TREATMENT mud, its operating cost is also at 100～180 yuan/ton of wet mud for semi-oriented+multifuel combustion.In pharmaceutical industry, process the expense of one ton of bacterium slag (dry, burn) 1500 yuan of left and right, pharmacy corporation is invested huge every year in bacterium slag disposal costs.
China is the country of a rich coal, oil-poor, weak breath, rich coal resources, and the selected ratio of raw coal accounts for 45% of coal total resources, and annual coal slime is up to more than 2,000 ten thousand tons.Coal slime is that a kind of ash content is high, washiness, fine size, viscosity is large and Additional Value of Commodities is poor low heat value mine tailing, having the water of chance runs off, air-dryly fly upward, be difficult to the features such as storage and transportation, if abandon as waste material, the environmental problem causing is more much bigger than coal washing spoil, very easily produces serious environmental pollution.On market, be that the simple conduct of a part of coal slime " honeycomb briquette " flows to market, all the other major parts do not obtain rationally effectively exploitation.
Water-coal-slurry is a kind of Novel coal base fluid fuel, that national new high-tech product and Key Environmental Protection are promoted product, it is to be mixed and processed by a certain proportion of coal, water, chemical addition agent, have that concentration is high, efficiency of combustion is high, load regulation range is large, environmental protection and energy saving, the advantage such as safe and efficient, be real clean fuel technology of current China.
Summary of the invention
The problem existing in processing for above-mentioned existing high concentration debirs, in conjunction with water-coal-slurry clean burning technology, the object of this invention is to provide a kind of high concentration debirs innocuity disposal system, this system can be mixed with coal water slurry fuel by high concentration debirs and coal slime or fine grained cleaned coal, can solve and process investment and the environmental issue that industrial organic waste brings, also opened up enterprise's high concentration debirs recycling economy recycling approach, improve energy supply and consumption efficiency, reduced production cost.Another one object of the present invention is to provide the treatment process that utilizes this system, using high concentration debirs as water-coal-slurry clean energy resource raw material, adopt recirculating fluidized bed low temperature combustion mode, not only reach the harmless treatment of high concentration debirs but also realize the extensive comprehensive utilization of resources of coal slime, the treatment of wastes with processes of wastes against one another.
A kind of high concentration debirs innocuity disposal system provided by the present invention: debirs storage tank is connected to filter, and filter is connected to mixer by delivery pump, and water tank and dispersant storage tank are connected respectively to described mixer; Described mixer is connected with vibratory sieve and buffering chamber successively, and buffering chamber is connected to the combustion chamber of CFBB by water-coal-slurry plunger displacement pump, and combustion chamber is connected with cyclone separator; Smoke outlet in cyclone separator import and combustion chamber is respectively arranged with denitrification apparatus; Described cyclone separator is connected to the back-end ductwork of CFBB, and back-end ductwork is connected to Turbo-generator Set; Described back-end ductwork is connected successively with deduster, desulfurizer, air-introduced machine and chimney; Bottom at described back-end ductwork is provided with air preheater, and air preheater is connected to outside pressure fan.
Further, described buffering chamber is connected to the top of the combustion chamber of CFBB.
A kind of high concentration debirs harmless treatment process provided by the present invention, specifically comprise the following steps: 1) first utilize high concentration debirs to carry out the experiment of water-coal-slurry paste-forming properties, determine the addition of high concentration debirs, coal slime or coal dust, water and dispersant according to water-coal-slurry slurryability, the high concentration debirs that industrial production is discharged and coal slime or fine grained cleaned coal mixing match are made water-coal-slurry, test the moisture content of definite addition control water-coal-slurry by paste-forming properties, 2) by being stored in waste tank from the high concentration debirs of industrial production discharge, after removing impurity, filter delivers to mixer by delivery pump, 3) coal slime after fragmentation or coal dust enter scrapper conveyor, after metering, enter mixer and be mixed and made into water-coal-slurry with high concentration debirs by batcher, water-coal-slurry is entered CFBB after vibratory sieve filters by top combustion chambers burn by water-coal-slurry plunger displacement pump, in stove, temperature is controlled at 850 ℃～950 ℃, flue gas after burning is isolated combustible through cyclone separator, after-flame circulates in CFBB, high-temperature flue gas heat exchange in back-end ductwork is cooling, then enter denitrification apparatus and desulfurizer and carry out respectively denitration, desulfurization processing, finally remove dust by deduster, meet high altitude discharge after discharge standard, after the cooling collection of the remaining lime-ash of cool water mixture burning for cement building material raw material or brickmaking.
Above-mentioned steps 1) the coal mud water slurry moisture control made is 28%～35%.
Above-mentioned steps 1) in dispersant be lignin sulfonic acid dipersant and naphthalenesulfonate formaldehyde condensation compound dispersant, addition is 0.3%～1% of water-coal-slurry gross mass.
Above-mentioned steps 1) in the sieve diameter≤25mm of vibratory sieve, deduster adopts Low-Pressure Pulse Bag Filter.
Above-mentioned steps 3) in denitrification apparatus adopt non-selective catalytic reduction method, desulfurizer adopts wet desulfurization of flue gas by limestone-gypsum method technique.
The superheated steam that waste heat boiler of the present invention generates can be used for generating or drags or heat supply, and gas cleaning and dust pelletizing system adopt " non-selective catalytic-reduction denitrified+wet desulfurization of flue gas by limestone-gypsum method+Low-Pressure Pulse Bag Filter " group technology.Compared with conventional high concentration debirs treatment process, superiority of the present invention is embodied in:
(1) pulping process flow is simple, and reduced investment is easy to promote and industrial applications;
(2) high concentration debirs and coal slime or fine grained cleaned coal are mixed with coal water slurry fuel, both investment and the environmental issue of processing industrial organic waste had been solved, opened up enterprise's high concentration debirs recycling economy recycling approach simultaneously, improve energy supply and consumption efficiency, reduced production cost;
(3) owing to being to adopt the mode of water-coal-slurry to process high concentration debirs, convert high concentration debirs to clean energy resource, realize the processing of debirs clean burning, utilize high concentration debirs to substitute the required moisture of preparation water-coal-slurry simultaneously, not only save valuable water resource, but also increased to a certain extent the calorific value of water-coal-slurry;
(4) adopt water-coal-slurry clean fuel in conjunction with recirculating fluidized bed low-temperature burning technology, realize desulfuration in furnace and low NOx drainage;
(5) system run all right, continuous operation, can realize high concentration debirs scale processing.
In addition, the present invention adopts water-coal-slurry CFBC processing mode to realize to reduce and pollutes, protect and improve environment object, burns relatively separately the zero-emission that becomes of high concentration debirs ， bioxin, main because:
(1) this process using high concentration debirs and coal slime are made water-coal-slurry multifuel combustion, research shows, in CFBB, adopt the mode of mixing burning can greatly reduce the growing amount of combustion process bioxin, significant for combustion tail gas qualified discharge;
(2) fluid bed furnace temperature control is more than 850 ℃, and the time of staying is long, and under action of high-speed airflow, in stove, turbulivity is large, makes the burning of high concentration debirs thoroughly, stops the synthetic of bioxin;
(one of precondition that 3) dioxins form is to have chlorine source, therefore the control of chlorion is played a key effect to the generation that suppresses bioxin, general high concentration debirs are as extremely low in chlorinities such as coking chemical waste water, papermaking night, wine brewing vinasse, pharmacy bacterium slag, dyeing waste waters, add that water-coal-slurry proportioning moisture control is in 30% left and right, therefore water-coal-slurry chloride content is extremely low, thereby reduces the formation condition of bioxin;
(4) water-coal-slurry main fuel is coal slime, and because coal slime ash content is high, in ash, alkaline-earth oxide Dui bioxin is formed with certain inhibitory action.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Fig. 2 is system architecture schematic diagram of the present invention.Description of symbols in figure: 1-raw material carrier vehicle; 2-coal storage storehouse; The 3-grab bucket of driving a vehicle; 4-breaker; 5-discharger; 6-scrapper conveyor; 7-water tank; 8-dispersant storage tank; 9-debirs storage tank; 10-filter; 11-delivery pump; 12-mixer; 13-vibratory sieve; 14-buffer tank; 15-water-coal-slurry plunger displacement pump; 16-combustion chamber; 17-cyclone separator; 18-back-end ductwork; 19-Turbo-generator Set; 20-oxygen-eliminating device; 21-feed pump; 22-denitrification apparatus; 23-pressure fan; 24-ash conveying device; 25-Low-Pressure Pulse Bag Filter; 26-desulfurizer; 27-air-introduced machine; 28-chimney; 29-bulk cement storage tank; 30-the first lime-ash transport vehicle; Slag cooler at the bottom of 31-; 32-the second lime-ash transport vehicle; 33-light oil tank; 34-light oil pump; 35-burner; 36-cesspool; 37-economizer; 38-air preheater.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is illustrated.
Process chart of the present invention as shown in Figure 1, system architecture schematic diagram of the present invention as shown in Figure 2, a kind of high concentration debirs harmless treatment process and system, first there is refuse to carry out paste-forming properties experiment to high concentration, measure water-coal-slurry moisture content, apparent viscosity and flow behavior, to determine that high concentration has refuse and the best proportioning of coal slime, and calculate the addition of high concentration debirs, coal slime, water and dispersant, carry for optimizing coal water slurry fuel, improving the stability of a system provides technical conditions.
On above-mentioned paste-forming properties experiment basis, high concentration is had to waste storage in debirs storage tank 9, debirs storage tank possesses 8 hours above storage volumes, delivers to mixer 12 interior as water-coal-slurry raw material after filter 10 is removed impurity by delivery pump 11.Need to determine that from the coal slime of coal washery calorific value is more than 3000kcal/kg, meet the coal slime of calorific value requirement in coal slime transport vehicle 1 is delivered to coal storage storehouse 2, coal storage storehouse 2 can store material 10 days, coal slime delivers to by the grab bucket 3 of driving a vehicle that breaker 4 is interior to be dropped down onto on scrapper conveyor 6 through discharger 5, be delivered to mixer 12 as coal mud water slurry raw material by scrapper conveyor 6 again, according to coal slime moisture content, high concentration debirs moisture content and paste-forming properties are tested definite coal mud water slurry moisture content meter and calculate the water yield of extra interpolation, this part supplementing water is provided by water tank 7, simultaneously, the dispersant of interpolation 0.3%～1% improves the hydrophily of water-coal-slurry, mobility and stability, dispersant is provided by dispersant storage tank 8.
The water-coal-slurry stirring is before entering CFBB, remove by filter after impurity through vibratory sieve 13, be temporarily stored in buffering chamber 14, to guarantee the continuity of coal mud water slurry feed, then enter combustion chamber 16 by water-coal-slurry plunger displacement pump 15 by top, indoor temperature is controlled at 850 ℃～950 ℃, and the high-temperature flue gas after burning is first isolated combustible through cyclone separator 17 and returned to the interior second-time burning in combustion chamber 16, improves efficiency of combustion.Be provided with denitrification apparatus 22 in cyclone separator 17 imports and smoke outlet, after denitrification apparatus 22 denitrations, export NOx concentration lower than 100mg/Nm
3.Cyclone separator 17 high-temperature flue gas is out cooling in the interior heat exchange of back-end ductwork 18, produces superheated steam and delivers to Turbo-generator Set 19, realizes cogeneration of heat and power or heat supply drags.Flue gas is introduced Low-Pressure Pulse Bag Filter 25 except dust after economizer 37 coolings, meets outlet dust concentration≤30mg/m
3emission request, desulfurizer 26 is connected with bag-type dust, and flue gas was controlled flue-gas temperature at 125 ℃ before entering desulfurizer 26, and described desulfurizer 26 is wet desulfurization of flue gas by limestone-gypsum method technique, SO in flue gas after desulfurizing and purifying
2concentration of emission≤50mg/Nm
3, in sweetening process, objectionable impurities contained in flue gas is as flying dust, SO
3, the major part such as HCl and HF also removed, flue gas meets after discharge standard through 80m chimney 28 high altitude discharges.
CFBC required air is provided by pressure fan 23, for improving efficiency of combustion, be provided with air preheater 38 at back-end ductwork 18 ends, after cool water mixture burning, remaining slag is delivered to cement plant as cement building material raw material by the second lime-ash transport vehicle 32 after end slag cooler 31 is cooling, the flying dust centralized collection that back-end ductwork 18 and sack cleaner 25 are collected is delivered to cement plant as cement building material raw material by the first lime-ash transport vehicle 30 to bulk cement storage tank 29, realizes resource circulation utilization.When recirculating fluidized bed starts, open burner 35, required fuel is provided by light oil tank 33.
According to actual conditions, in above-mentioned technique and System Implementation process, if coal slime calorific value is less than 3000kcal/kg or coal slurry fuel shortage, can adds fine grained cleaned coal and improve coal slime calorific value, realize high concentration debirs harmlessness disposing.Because pre-treatment pulping process flow is simple, reduced investment, be easy to promote and industrial applications, in implementation process, convert high concentration debirs to clean energy resource, realize the processing of debirs clean burning, utilize high concentration debirs to substitute the required moisture of preparation water-coal-slurry simultaneously, not only save valuable water resource, but also increase to a certain extent the calorific value of water-coal-slurry, both investment and the environmental issue of processing industrial organic waste had been solved, open up again enterprise's high concentration debirs recycling economy recycling approach, energy supply and consumption efficiency are improved, reduce production cost.
The present invention can also have other embodiments, all changing, and the technique and the system schema that adopt equal replacement or equivalent transformation to form, within all should being included in the scope of the present invention.
Claims (7)
1. a high concentration debirs innocuity disposal system, is characterized in that, debirs storage tank is connected to filter, and filter is connected to mixer by delivery pump, and water tank and dispersant storage tank are connected respectively to described mixer; Described mixer is connected with vibratory sieve and buffering chamber successively, and buffering chamber is connected to the combustion chamber of CFBB by water-coal-slurry plunger displacement pump, and combustion chamber is connected with cyclone separator; Smoke outlet in cyclone separator import and combustion chamber is respectively arranged with denitrification apparatus; Described cyclone separator is connected to the back-end ductwork of CFBB, and back-end ductwork is connected to Turbo-generator Set; Described back-end ductwork is connected successively with deduster, desulfurizer, air-introduced machine and chimney; Bottom at described back-end ductwork is provided with air preheater, and air preheater is connected to outside pressure fan.
2. a kind of high concentration debirs innocuity disposal system according to claim 1, is characterized in that, described buffering chamber is connected to the top of the combustion chamber of CFBB.
3. a high concentration debirs harmless treatment process, is characterized in that, concrete steps are as follows:
1) first utilize high concentration debirs to carry out the experiment of water-coal-slurry paste-forming properties, determine the addition of high concentration debirs, coal slime or coal dust, water and dispersant according to water-coal-slurry slurryability; The high concentration debirs that industrial production is discharged and coal slime or fine grained cleaned coal mixing match are made water-coal-slurry, test the moisture content of definite addition control water-coal-slurry by paste-forming properties;
2) by being stored in waste tank from the high concentration debirs of industrial production discharge, after removing impurity, filter delivers to mixer by delivery pump;
3) coal slime after fragmentation or coal dust enter scrapper conveyor, after metering, enter mixer and be mixed and made into water-coal-slurry with high concentration debirs by batcher, water-coal-slurry is entered CFBB after vibratory sieve filters by top combustion chambers burn by water-coal-slurry plunger displacement pump, in stove, temperature is controlled at 850 ℃～950 ℃, flue gas after burning is isolated combustible through cyclone separator, after-flame circulates in CFBB, high-temperature flue gas heat exchange in back-end ductwork is cooling, then enter denitrification apparatus and desulfurizer and carry out respectively denitration, desulfurization processing, finally remove dust by deduster, meet high altitude discharge after discharge standard, after the cooling collection of the remaining lime-ash of cool water mixture burning for cement building material raw material or brickmaking.
4. a kind of high concentration debirs harmless treatment process according to claim 3, is characterized in that: the water-coal-slurry moisture control of making in described step 1) is 28%～35%.
5. a kind of high concentration debirs harmless treatment process according to claim 3, it is characterized in that: in described step 1), dispersant is lignin sulfonic acid dipersant and naphthalenesulfonate formaldehyde condensation compound dispersant, and addition is 0.3%～1% of water-coal-slurry gross mass.
6. a kind of high concentration debirs harmless treatment process according to claim 3, is characterized in that: the sieve diameter≤25mm of vibratory sieve in described step 3); Described deduster adopts Low-Pressure Pulse Bag Filter.
7. a kind of high concentration debirs harmless treatment process according to claim 3, is characterized in that: in described step 3), denitrification apparatus adopts non-selective catalytic reduction method, and desulfurizer adopts wet desulfurization of flue gas by limestone-gypsum method technique.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI593794B (en) * | 2014-09-19 | 2017-08-01 | Industrial sludge made of renewable building materials method | |
| CN111520730A (en) * | 2020-05-26 | 2020-08-11 | 西安热工研究院有限公司 | Sludge-water-coal-slurry co-combustion system for coal-fired boiler and working method thereof |
| CN111573648A (en) * | 2020-04-09 | 2020-08-25 | 浙江省天正设计工程有限公司 | Struvite method recycling treatment process for phosphorus and sulfur containing high-concentration organic wastewater |
| CN113915626A (en) * | 2021-10-29 | 2022-01-11 | 陕西大唐新能电力设计股份有限公司 | Feeding system for resource utilization of sludge incineration disposal and operation method |
| CN115978574A (en) * | 2023-03-20 | 2023-04-18 | 河南瑞德克气力输送设备有限公司 | Pulverized coal quantitative feeding system for side-blown furnace |
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| CN111520730A (en) * | 2020-05-26 | 2020-08-11 | 西安热工研究院有限公司 | Sludge-water-coal-slurry co-combustion system for coal-fired boiler and working method thereof |
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| CN115978574A (en) * | 2023-03-20 | 2023-04-18 | 河南瑞德克气力输送设备有限公司 | Pulverized coal quantitative feeding system for side-blown furnace |
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Application publication date: 20140507 |